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Any Transport over MPLS

This document describes the Any Transport over MPLS (AToM) feature, which provides the following capabilities:

  • Transport data link layer (Layer2) packets over a Multiprotocol Label Switching (MPLS) backbone.
  • Enable service providers to connect customer sites with existing Layer 2 networks by using a single, integrated, packet-based network infrastructure--a Cisco MPLS network. Instead of using separate networks with network management environments, service providers can deliver Layer 2 connections over an MPLS backbone.
  • Provide a common framework to encapsulate and transport supported Layer 2 traffic types over an MPLS network core.

AToM supports the following like-to-like transport types:

  • ATM Adaptation Layer Type-5 (AAL5) over MPLS
  • ATM Cell Relay over MPLS
  • Ethernet over MPLS (VLAN and port modes)
  • Frame Relay over MPLS
  • PPP over MPLS
  • High-Level Data Link Control (HDLC) over MPLS

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

Prerequisites for Any Transport over MPLS

Before configuring AToM, ensure that the network is configured as follows:

Restrictions for Any Transport over MPLS

General Restrictions

The following general restrictions pertain to all transport types under AToM:

  • Address format: Configure the Label Distribution Protocol (LDP) router ID on all PE routers to be a loopback address with a /32 mask. Otherwise, some configurations might not function properly.
  • Layer 2 virtual private networks (L2VPN) features (AToM and Layer 2 Tunnel Protocol Version 3 (L2TPv3)) are not supported on an ATM interface.
  • Distributed Cisco Express Forwarding is the only forwarding model supported on the Cisco 12000 series routers and is enabled by default. Disabling distributed Cisco Express Forwarding on the Cisco 12000 series routers disables forwarding.
  • Distributed Cisco Express Forwarding mode is supported on the Cisco 7500 series routers for Frame Relay, HDLC, and PPP. In distributed Cisco Express Forwarding mode, the switching process occurs on the Versatile Interface Processors (VIPs) that support switching. When distributed Cisco Express Forwarding is enabled, VIP port adapters maintain identical copies of the Forwarding Information Base (FIB) and adjacency tables. The port adapters perform the express forwarding between port adapters, relieving the Route Switch Processor (RSP) from performing the switching. Distributed Cisco Express Forwarding uses an interprocess communications (IPC) mechanism to ensure synchronization of FIBs and adjacency tables between the RSP and port adapters.
  • To convert an interface with L2TPv3 xconnect to AToM xconnect, remove the L2TPv3 configuration from the interface and then configure AToM. Some features may not work if AToM is configured when L2TPv3 configuration is not removed properly.

ATM Cell Relay over MPLS Restrictions

The following restrictions pertain to ATM Cell Relay over MPLS:

  • For ATM Cell Relay over MPLS,if you have TE tunnels running between the PE routers, you must enable LDP on the tunnel interfaces.
  • Configuring ATM Relay over MPLS with the Cisco 12000 Series Router engine 2 8-port OC-3 STM-1 ATM line card: In Cisco IOS Release 12.0(25)S, there were special instructions for configuring ATM cell relay on the Cisco 12000 series router with an engine 2 8-port OC-3 STM-1 ATM line card. The special configuration instructions do not apply to releases later than Cisco IOS Release 12.0(25)S and you do not need to use the atm mode cell-relay command.

In Cisco IOS Release 12.0(25)S, when you configured the Cisco 12000 series 8-port OC-3 STM-1 ATM line card for ATM Cell Relay over MPLS, two ports were reserved. In releases later than Cisco IOS Release 12.0(25)S, only one port is reserved.

In addition, in Cisco IOS Release 12.0(25)S, if you configured an 8-port OC-3 STM-1 ATM port for ATM Adaptation Layer 5 (AAL5) over MPLS and then configured ATM single cell relay over MPLS on that port, the Virtual Circuits (VCs) and Virtual Paths (VPs) for AAL5 on the port and its corresponding port were removed. Starting in Cisco IOS Release 12.0(26)S, this behavior no longer occurs. ATM AAL5 over MPLS and ATM single cell relay over MPLS are supported on the same port. The Cisco 12000 series 8-port OC-3 STM-1 ATM line cards now support, by default, the ATM single cell relay over MPLS feature in both VP and VC modes and ATM AAL5 over MPLS on the same port.

  • The F4 end-to-end Operation, Administration, and Maintenance (OAM) cells are transparently transported along with the ATM cells. When a permanent virtual path (PVP) or Permanent Virtual Circuit (PVC) is down on one PE router, the label associated with that PVP or PVC is withdrawn. Subsequently, the peer PE router detects the label withdrawal and sends an F4 AIS/RDI signal to its corresponding customer edge (CE) router. The PVP or PVC on the peer PE router remains in the up state.

Ethernet over MPLS (EoMPLS) Restrictions

The following restrictions pertain to the Ethernet over MPLS feature:

  • Ethernet over MPLS supports VLAN packets that conform to the IEEE 802.1Q standard. The 802.1Q specification establishes a standard method for inserting VLAN membership information into Ethernet frames. The Inter-Switch Link (ISL) protocol is not supported between the PE and CE routers.
  • The AToM control word is supported. However, if the peer PE does not support a control word, the control word is disabled. This negotiation is done by LDP label binding.
  • Ethernet packets with hardware-level cyclic redundancy check (CRC) errors, framing errors, and runt packets are discarded on input.
  • In Cisco IOS Release 12.2(25)S, the behavior of the mpls mtu command changed. If the interface MTU is less than 1524 bytes, you can set the maximum MPLS MTU to 24 bytes more than the interface MTU. For example, if the interface MTU is set to 1510 bytes, then you can set the maximum MPLS MTU to 1534 bytes (1510 + 24).

Caution

Although you can set the MPLS MTU to a value greater than the interface MTU, you must set the MPLS MTU to a value less than or equal to the interface MTU to prevent data corruption, dropped packets, and high CPU rates.

If the interface MTU is greater than or equal to 1524 bytes, then you can set the maximum MPLS MTU as high as the interface MTU. For example, if the interface MTU is set to 1600 bytes, then you can set the MPLS MTU to a maximum of 1600 bytes. If you set the MPLS MTU to a value higher than the interface MTU, traffic is dropped.

For interfaces that do not allow you to configure the interface MTU value and for interfaces where the interface MTU is 1500 bytes, the MPLS MTU range is 64 to 1524 bytes.

If you upgrade to Cisco IOS Release 12.2(25)S from an earlier release and you have an MPLS MTU setting that does not conform to these guidelines, the command is rejected. See the Maximum Transmission Unit Guidelines for Estimating Packet Size for more information.

Per-Subinterface MTU for Ethernet over MPLS Restrictions

  • The following features do not support MTU values in xconnect subinterface configuration mode:
    • Layer 2 Tunnel Protocol Version 3 (L2TPv3)
    • Virtual Private LAN services (VPLS)
    • L2VPN Pseudowire Switching
  • The MTU value can be configured in xconnect subinterface configuration mode only on the following interfaces and subinterfaces:
    • Fast Ethernet
    • Gigabit Ethernet
  • The router uses an MTU validation process for remote VCs established through LDP, which compares the MTU value configured in xconnect subinterface configuration mode to the MTU value of the remote customer interface. If an MTU value has not been configured in xconnect subinterface configuration mode, then the validation process compares the MTU value of the local customer interface to the MTU value of the remote xconnect, either explicitly configured or inherited from the underlying interface or subinterface.
  • When you configure the MTU value in xconnect subinterface configuration mode, the specified MTU value is not enforced by the dataplane. The dataplane enforces the MTU values of the interface (port mode) or subinterface (VLAN mode).
  • Ensure that the interface MTU is larger than the MTU value configured in xconnect subinterface configuration mode. If the MTU value of the customer-facing subinterface is larger than the MTU value of the core-facing interface, traffic may not be able to travel across the pseudowire.

Frame Relay over MPLS Restrictions

The following restrictions pertain to the Frame Relay over MPLS feature:

  • Frame Relay traffic shaping is not supported with AToM switched VCs.
  • If you configure Frame Relay over MPLS on the Cisco 12000 series router and the core-facing interface is an engine 4 or 4+ line card and the edge-facing interface is an engine 0 or 2 line card, then the BECN, FECN, control word (CW), and DE bit information is stripped from the PVC.

Information About Any Transport over MPLS

How AToM Transports Layer 2 Packets

AToM encapsulates Layer 2 frames at the ingress PE and sends them to a corresponding PE at the other end of a pseudowire, which is a connection between the two PE routers. The egress PE removes the encapsulation and sends out the Layer 2 frame.

The successful transmission of the Layer 2 frames between PE routers is due to the configuration of the PE routers. You can set up the connection, called a pseudowire, between the routers and specify the following information on each PE router:

  • The type of Layer 2 data that will be transported across the pseudowire such as Ethernet, Frame Relay, or ATM
  • The IP address of the loopback interface of the peer PE router, which enables the PE routers to communicate
  • A unique combination of peer PE IP address and VC ID that identifies the pseudowire

The following example shows the basic configuration steps on a PE router that enable the transport of Layer 2 packets. Each transport type has slightly different steps.

Step 1 defines the interface or subinterface on the PE router:

Router# interface 
interface-type interface-number

Step 2 specifies the encapsulation type for the interface, such as dot1q:

Router(config-if)# encapsulation encapsulation-type

Step 3 does the following:

  • Makes a connection to the peer PE router by specifying the LDP router ID of the peer PE router.
  • Specifies a 32-bit unique identifier, called the VC ID, which is shared between the two PE routers.

The combination of the peer router ID and the VC ID must be unique on the router. Two circuits cannot use the same combination of the peer router ID and VC ID.

  • Specifies the tunneling method used to encapsulate data in the pseudowire. AToM uses MPLS as the tunneling method. 
Router(config-if)# xconnect peer-router-id vcid encapsulation mpls

As an alternative, you can set up a pseudowire class to specify the tunneling method and other characteristics. For more information, see the Configuring the Pseudowire Class.

AToM Configuration Commands Prior to Cisco IOS Release 12.0(25)S

In releases of AToM before Cisco IOS 12.0(25)S, the mpls l2 transport routecommand was used to configure AToM circuits.This command has been replaced with the xconnectcommand.

No enhancements will be made to the mpls l2transport routecommand. Enhancements will be made to either the xconnectcommand or the pseudowire-classcommand. Therefore, Cisco recommends that you use the xconnect command to configure AToM circuits.

Configurations from releases before Cisco IOS 12.0(25)S that use the mpls l2transport routecommand are still supported.

Benefits of AToM

The following list explains some of the benefits of enabling Layer 2 packets to be sent in the MPLS network:

  • The AToM product set accommodates many types of Layer 2 packets, including Ethernet and Frame Relay, across multiple Cisco router platforms, such as the Cisco 7200 and Cisco 7500 series routers. This enables the service provider to transport all types of traffic over the backbone and accommodate all types of customers.
  • AToM adheres to the standards developed for transporting Layer 2 packets over MPLS. (See the "Standards" section for the specific standards that AToM follows.) This benefits the service provider that wants to incorporate industry-standard methodologies in the network. Other Layer 2 solutions are proprietary, which can limit the service provider’s ability to expand the network and can force the service provider to use only one vendor’s equipment.
  • Upgrading to AToM is transparent to the customer. Because the service provider network is separate from the customer network, the service provider can upgrade to AToM without disruption of service to the customer. The customers assume that they are using a traditional Layer 2 backbone.

MPLS Traffic Engineering Fast Reroute

AToM can use MPLS traffic engineering (TE) tunnels with fast reroute (FRR) support. AToM VCs can be rerouted around a failed link or node at the same time as MPLS and IP prefixes.

Enabling fast reroute on AToM does not require any special commands; you can use the standard fast reroute (FRR) commands. At the ingress PE, an AToM tunnel is protected by fast reroute when it is routed to an FRR-protected TE tunnel. Both link and node protection are supported for AToM VCs at the ingress PE. For more information on configuring MPLS TE fast reroute, see the following document:

MPLS Traffic Engineering (TE)--Link and Node Protection, with RSVP Hellos Support


Note

The AToM VC independence feature was introduced in Cisco IOS Release 12.0(31)S. This feature enables the Cisco 12000 series router to perform fast reroute in fewer than 50 milliseconds, regardless of the number of VCs configured. In previous releases, the fast reroute time depended on the number of VCs inside the protected TE tunnel.

For the Cisco 12000 series routers, fast reroute uses three or more labels, depending on where the TE tunnel ends:

  • If the TE tunnel is from a PE router to a PE router, three labels are used.
  • If the TE tunnel is from a PE router to the core router, four labels are used.

Engine 0 ATM line cards support three or more labels, but the performance degrades. Engine 2 Gigabit Ethernet line cards and engine 3 line cards support three or more labels and can work with the fast reroute feature.

You can issue the debug mpls l2transport fast-reroutecommand to debug fast reroute with AToM.


Note

This command does not display output on platforms where AToM fast reroute is implemented in the forwarding code. The command does display output on Cisco 10720 Internet router line cards and Cisco 12000 series line cards. This command does not display output for the Cisco 7500 (both Route Processor (RP) and Versatile Interface Processor (VIP)) series routers, Cisco 7200 series routers, and Cisco 12000 series RP.

In the following example, the primary link is disabled, which causes the backup tunnel (Tunnel 1) to become the primary path. In the following example, bolded output shows the status of the tunnel: 

Router# execute-on slot 3 debug mpls l2transport fast-reroute
========= Line Card (Slot 3) =========
AToM fast reroute debugging is on
SLOT 3:Sep 16 17:58:56.346: AToM SMGR: Processing TFIB FRR event for 10.4.0.1
SLOT 3:Sep 16 17:58:56.346: AToM SMGR: Finished processing TFIB FRR event for 10.4.0.1
SLOT 3:Sep 16 17:58:56.346: AToM SMGR: Processing TFIB FRR event for Tunnel41
SLOT 3:Sep 16 17:58:56.346: AToM SMGR: Finished processing TFIB FRR event for Tunnel41
Sep 16 17:58:58.342: %LINK-3-UPDOWN: Interface POS0/0, changed state to down
Sep 16 17:58:58.342: %OSPF-5-ADJCHG: Process 1, Nbr 10.0.0.1 on POS0/0 from FULL to DOWN, Neighbor Down: Interface down or detached
Sep 16 17:58:59.342: %LINEPROTO-5-UPDOWN: Line protocol on Interface POS0/0, changed state to down

Maximum Transmission Unit Guidelines for Estimating Packet Size

The following calculation helps you determine the size of the packets traveling through the core network. You set the maximum transmission unit (MTU) on the core-facing interfaces of the P and PE routers to accommodate packets of this size. The MTU should be greater than or equal to the total bytes of the items in the following equation:

Core MTU >= (Edge MTU + Transport header + AToM header + (MPLS label stack * MPLS label size))

The following sections describe the variables used in the equation:

Edge MTU

The edge MTU is the MTU for customer-facing interfaces.

Transport Header

The Transport header depends on the transport type. The table below lists the specific sizes of the headers.

Table 1 Header Size of Packets

Transport Type

Packet Size

AAL5

0-32 bytes

Ethernet VLAN

18 bytes

Ethernet Port

14 bytes

Frame Relay DLCI

2 bytes for Cisco encapsulation, 8 bytes for Internet Engineering Task Force (IETF) encapsulation

HDLC

4 bytes

PPP

4 bytes

AToM Header

The AToM header is 4 bytes (control word). The control word is optional for Ethernet, PPP, HDLC, and cell relay transport types. However, the control word is required for Frame Relay and ATM AAL5 transport types.

MPLS Label Stack

The MPLS label stack size depends on the configuration of the core MPLS network:

  • AToM uses one MPLS label to identify the AToM VCs (VC label). Therefore, the minimum MPLS label stack is one for directly connected AToM PEs, which are PE routers that do not have a P router between them.
  • If LDP is used in the MPLS network, the label stack size is two (the LDP label and the VC label).
  • If a TE tunnel is used instead of LDP between PE routers in the MPLS network, the label stack size is two (the TE label and the VC label).
  • If a TE tunnel and LDP are used in the MPLS network (for example, a TE tunnel between P routers or between P and PE routers, with LDP on the tunnel), the label stack is three (the TE label, LDP label, and VC label).
  • If you use MPLS fast reroute in the MPLS network, you add a label to the stack. The maximum MPLS label stack in this case is four (the FRR label, TE label, LDP label, and VC label).
  • If AToM is used by the customer carrier in an MPLS VPN Carrier Supporting Carrier environment, you add a label to the stack. The maximum MPLS label stack in the provider carrier network is five (the FRR label, TE label, LDP label, VPN label, and VC label).
  • If an AToM tunnel spans different service providers that exchange MPLS labels using IPv4 Border Gateway Protocol (BGP) (RFC 3107), you add a label to the stack. The maximum MPLS label stack is five (the FRR label, TE label, Border Gateway Protocol (BGP) label, LDP label, and VC label).

Other circumstances can increase the MPLS label stack size. Therefore, analyze the complete data path between the AToM tunnel endpoints, determine the maximum MPLS label stack size for your network, and then multiply the label stack size by the size of the MPLS label.

Example Estimating Packet Size

The size of packets is estimated in the following example, which uses the following assumptions:

  • The edge MTU is 1500 bytes.
  • The transport type is Ethernet VLAN, which designates 18 bytes for the transport header.
  • The AToM header is 0, because the control word is not used.
  • The MPLS label stack is 2, because LDP is used. The MPLS label is 4 bytes. 
Edge MTU + Transport header + AToM header + (MPLS label stack * MPLS label) = Core MTU
1500     + 18                    + 0      + (2                * 4         ) = 1526

You must configure the P and PE routers in the core to accept packets of 1526 bytes.

Once you determine the MTU size to set on your P and PE routers, you can issue the mtucommand on the routers to set the MTU size. The following example specifies an MTU of 1526 bytes:

Router(config-if)# mtu 1526

mpls mtu Command Changes

Some interfaces (such as FastEthernet) require the mpls mtu command to change the MTU size. In Cisco IOS Release 12.2(25)S, the behavior of the mpls mtu command changed.

If the interface MTU is fewer than 1524 bytes, you can set the maximum MPLS MTU to 24 bytes more than the interface MTU. For example, if the interface MTU is set to 1510 bytes, then you can set the maximum MPLS MTU to 1534 bytes (1510 + 24).


Caution

Although you can set the MPLS MTU to a value greater than the interface MTU, you must set the MPLS MTU value to less than or equal to the interface MTU to prevent data corruption, dropped packets, and high CPU rates.

If the interface MTU is greater than or equal to 1524 bytes, then you can set the maximum MPLS MTU value to as high as the interface MTU value. For example, if the interface MTU is set to 1600 bytes, then you can set the MPLS MTU to a maximum of 1600 bytes. If you set the MPLS MTU value to higher than the interface MTU, traffic is dropped.

For interfaces that do not allow you to configure the interface MTU value and for interfaces where the interface MTU is 1500 bytes, the MPLS MTU range is 64 to 1524 bytes.

For GRE tunnel interfaces you can set the MPLS MTU value to either the default value or the maximum value that is supported by the platform for the interface.

You can set the MPLS MTU value to the maximum value by using the max keyword along with the mpls mtu command. The mpls mtu max command allows the previously dropped packets to pass through the GRE tunnel by fragmentation on the underlying physical interface.

Note that the MPLS MTU value cannot be greater than the interface MTU value for non-GRE tunnels.

If you upgrade to Cisco IOS Release 12.2(25)S and you have an MPLS MTU setting that does not conform to these guidelines, the command is rejected.

For Cisco IOS Release 12.2(27)SBC, 12.2(33)SRA, 12.4(11)T, 12.2(33)SXH, and later releases, you cannot set the MPLS MTU to a value greater than the interface MTU. This eliminates problems, such as dropped packets, data corruption, and high CPU rates. See the MPLS MTU Command Changes document for more information.

Per-Subinterface MTU for Ethernet over MPLS

MTU values can be specified in xconnect subinterface configuration mode. When you use xconnect subinterface configuration mode to set the MTU value, you establish a pseudowire connection for situations where the interfaces have different MTU values that cannot be changed.

If you specify an MTU value in xconnect subinterface configuration mode that is outside the range of supported MTU values (64 bytes to the maximum number of bytes supported by the interface), the command might be rejected. If you specify an MTU value that is out of range in xconnect subinterface configuration mode, the router enters the command in subinterface configuration mode.

For example, if you specify an MTU of 1501 in xconnect subinterface configuration mode, and that value is out of range, the router enters the command in subinterface configuration mode, where it is accepted: 

Router# configure terminal
Router(config)# interface gigabitethernet0/0/2.1
Router(config-subif)# xconnect 10.10.10.1 100 encapsulation mpls
Router(config-subif-xconn)# mtu ?
<64 - 1500> MTU size in bytes
Router(config-subif-xconn)# mtu 1501 <<================
Router(config-subif)# mtu ?
<64 - 17940> MTU size in bytes

If the MTU value is not accepted in either xconnect subinterface configuration mode or subinterface configuration mode, then the command is rejected.

Frame Relay over MPLS and DTE DCE and NNI Connections

You can configure an interface as a DTE device or a DCE switch, or as a switch connected to a switch with network-to-network interface (NNI) connections. Use the following command in interface configuration mode:

frame-relay intf-type [dce | dte | nni]

The keywords are explained in the table below.

Table 2 frame-relay intf-type Command Keywords

Keyword

Description

dce

Enables the router or access server to function as a switch connected to a router.

dte

Enables the router or access server to function as a DTE device. DTE is the default.

nni

Enables the router or access server to function as a switch connected to a switch.

Local Management Interface and Frame Relay over MPLS

Local Management Interface (LMI) is a protocol that communicates status information about PVCs. When a PVC is added, deleted, or changed, the LMI notifies the endpoint of the status change. LMI also provides a polling mechanism that verifies that a link is up.

How LMI Works

To determine the PVC status, LMI checks that a PVC is available from the reporting device to the Frame Relay end-user device. If a PVC is available, LMI reports that the status is “Active,” which means that all interfaces, line protocols, and core segments are operational between the reporting device and the Frame Relay end-user device. If any of those components is not available, the LMI reports a status of “Inactive.”


Note

Only the DCE and NNI interface types can report the LMI status.

The figure below is a sample topology that helps illustrate how LMI works.

Figure 1. Sample Topology

In the figure above, note the following:

  • CE1 and PE1 and PE2 and CE2 are Frame Relay LMI peers.
  • CE1 and CE2 can be Frame Relay switches or end-user devices.
  • Each Frame Relay PVC comprises multiple segments.
  • The DLCI value is local to each segment and is changed as traffic is switched from segment to segment. Two Frame Relay PVC segments exist in the figure; one is between PE1 and CE1 and the other is between PE2 and CE2.

The LMI protocol behavior depends on whether you have DLCI-to-DLCI or port-to-port connections.

DLCI-to-DLCI Connections

If you have DLCI-to-DLCI connections, LMI runs locally on the Frame Relay ports between the PE and CE devices:

  • CE1 sends an active status to PE1 if the PVC for CE1 is available. If CE1 is a switch, LMI checks that the PVC is available from CE1 to the user device attached to CE1.
  • PE1 sends an active status to CE1 if the following conditions are met:
    • A PVC for PE1 is available.
    • PE1 received an MPLS label from the remote PE router.
    • An MPLS tunnel label exists between PE1 and the remote PE.

For DTE or DCE configurations, the following LMI behavior exists: The Frame Relay device accessing the network (DTE) does not report the PVC status. Only the network device (DCE) or NNI can report the status. Therefore, if a problem exists on the DTE side, the DCE is not aware of the problem.

Port-to-Port Connections

If you have port-to-port connections, the PE routers do not participate in the LMI status-checking procedures. LMI operates only between the CE routers. The CE routers must be configured as DCE-DTE or NNI-NNI.

For information about LMI, including configuration instructions, see the “Configuring the LMI” section of the Configuring Frame Relay document.

QoS Features Supported with AToM

For information about configuring QoS features on Cisco 12000 series routers, see the following feature module:

Any Transport over MPLS (AToM): Layer 2 QoS for the Cisco 12000 Series Router (Quality of Service)

The tables below list the QoS features supported by AToM on the Cisco 7200 and 7500 series routers.

Table 3 QoS Features Supported with Ethernet over MPLS on the Cisco 7200 and 7500 Series Routers

QoS Feature

Ethernet over MPLS

Service policy

Can be applied to:

  • Interface (input and output)
  • Subinterface (input and output)

Classification

Supports the following commands:

  • match cos (on interfaces and subinterfaces)
  • match mpls experimental (on interfaces and subinterfaces)
  • match qos-group (on interfaces) (output policy)

Marking

Supports the following commands:

  • set cos (output policy)
  • set discard-class (input policy)
  • set mpls experimental (input policy) (on interfaces and subinterfaces)
  • set qos-group (input policy)

Policing

Supports the following:

  • Single-rate policing
  • Two-rate policing
  • Color-aware policing
  • Multiple-action policing

Queueing and shaping

Supports the following:

  • Distributed Low Latency Queueing (dLLQ)
  • Distributed Weighted Random Early Detection (dWRED)
  • Byte-based WRED
Table 4 QoS Features Supported with Frame Relay over MPLS on the Cisco 7200 and 7500 Series Routers

QoS Feature

Frame Relay over MPLS

Service policy

Can be applied to:

  • Interface (input and output)
  • PVC (input and output)

Classification

Supports the following commands:

  • match fr-de (on interfaces and VCs)
  • match fr-dlci (on interfaces)
  • match qos-group

Marking

Supports the following commands:

  • frame-relay congestion management (output)
  • set discard-class
  • set fr-de (output policy)
  • set fr-fecn-becn (output)
  • set mpls experimental
  • set qos-group
  • threshold ecn (output)

Policing

Supports the following:

  • Single-rate policing
  • Two-rate policing
  • Color-aware policing
  • Multiple-action policing

Queueing and shaping

Supports the following:

  • dLLQ
  • dWRED
  • Distributed traffic shaping
  • Distributed class-based weighted fair queueing (dCBWFQ)
  • Byte-based WRED
  • random-detect discard-class-based command
Table 5 QoS Features Supported with ATM Cell Relay and AAL5 over MPLS on the Cisco 7200 and 7500 Series Routers

QoS Feature

ATM Cell Relay and AAL5 over MPLS

Service policy

Can be applied to:

  • Interface (input and output)
  • Subinterface (input and output)
  • PVC (input and output)

Classification

Supports the following commands:

  • match mpls experimental (on VCs)
  • match qos-group (output)

Marking

Supports the following commands:

  • random-detect discard-class-based (input)
  • set clp (output) (on interfaces, subinterfaces, and VCs)
  • set discard-class (input)
  • set mpls experimental (input) (on interfaces, subinterfaces, and VCs)
  • set qos-group (input)

Policing

Supports the following:

  • Single-rate policing
  • Two-rate policing
  • Color-aware policing
  • Multiple-action policing

Queueing and shaping

Supports the following:

  • dLLQ
  • dWRED
  • dCBWFQ
  • Byte-based WRED
  • random-detect discard-class-based command
  • Class-based shaping support on ATM PVCs

How to Configure Any Transport over MPLS

This section explains how to perform a basic AToM configuration and includes the following procedures:

Configuring the Pseudowire Class

The successful transmission of the Layer 2 frames between PE routers is due to the configuration of the PE routers. You set up the connection, called a pseudowire, between the routers.


Note

In simple configurations, this task is optional. You do not need to specify a pseudowire class if you specify the tunneling method as part of the xconnectcommand.

The pseudowire-class configuration group specifies the following characteristics of the tunneling mechanism:

  • Encapsulation type
  • Control protocol
  • Payload-specific options

For more information about the pseudowire-classcommand, see the following feature module: Layer 2 Tunnel Protocol Version 3.

You must specify the encapsulation mplscommandas part of the pseudowire class or as part of the xconnect command for the AToM VCs to work properly. If you omit the encapsulation mplscommandas part of the xconnectcommand, you will receive the following error: 

% Incomplete command.
SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    pseudowire-class name

    4.    encapsulation mpls

    5.    end


DETAILED STEPS
     Command or ActionPurpose
    Step 1 enable


    Example:
    Router> enable
     

    Enables privileged EXEC mode.

    • Enter your password if prompted.
     
    Step 2 configure terminal


    Example:
    Router# configure terminal
     

    Enters global configuration mode.

     
    Step 3 pseudowire-class name


    Example:
    Router(config)# pseudowire-class atom
     

    Establishes a pseudowire class with a name that you specify and enters pseudowire class configuration mode.

     
    Step 4 encapsulation mpls


    Example:
    Router(config-pw-class)# encapsulation mpls
     

    Specifies the tunneling encapsulation.

     
    Step 5 end


    Example:
    Router(config-pw-class)# end
     

    Exits pseudowire class configuration mode and returns to privileged EXEC mode.

     
    What to Do Next

    To change the type of encapsulation, remove the pseudowire with the no pseudowire-class command, reestablish the pseudowire, and specify the new encapsulation type.

    Once you specify the encapsulation mpls command, you can neither remove it using the no encapsulation mplscommand nor change the command setting using the encapsulation l2tpv3 command. If you try to remove or change the encapsulation type using the above-mentioned commands, you will get the following error message: 

    Encapsulation changes are not allowed on an existing pw-class.

    To remove a pseudowire, use the clear xconnect command in privileged EXEC mode. You can remove all pseudowires or specific pseudowires on an interface or peer router.

    Configuring ATM AAL5 over MPLS on PVCs

    ATM AAL5 over MPLS for PVCs encapsulates ATM AAL5 service data unit (SDUs) in MPLS packets and forwards them across the MPLS network. Each ATM AAL5 SDU is transported as a single packet.


    Note

    AAL5 over MPLS is supported only in SDU mode.

    >
    SUMMARY STEPS

      1.    enable

      2.    configure terminal

      3.    interface typeslot/port

      4.    pvc [name] vpi/vci l2transport

      5.    encapsulation aal5

      6.    xconnect peer-router-id vcid encapsulation mpls

      7.    exit

      8.    exit

      9.    exit

      10.    show mpls l2transport vc


    DETAILED STEPS
       Command or ActionPurpose
      Step 1 enable


      Example:
      Router> enable
       

      Enables privileged EXEC mode.

      • Enter your password if prompted.
       
      Step 2 configure terminal


      Example:
      Router# configure terminal
       

      Enters global configuration mode.

       
      Step 3 interface typeslot/port


      Example:
      Router(config)# interface atm1/0
       

      Specifies the interface by type, slot, and port number, and enters interface configuration mode.

       
      Step 4 pvc [name] vpi/vci l2transport


      Example:
      Router(config-if)# pvc 1/200 l2transport
       

      Creates or assigns a name to an ATM PVC and enters L2transport PVC configuration mode.

      • The l2transport keyword indicates that the PVC is a switched PVC instead of a terminated PVC.
       
      Step 5 encapsulation aal5


      Example:
      Router(config-if-atm-l2trans-pvc)# encapsulation aal5
       

      Specifies the ATM ALL5 encapsulation for the PVC.

      • Make sure that you specify the same encapsulation type on the PE and CE routers.
       
      Step 6 xconnect peer-router-id vcid encapsulation mpls


      Example:
      Router(config-if-atm-l2trans-pvc)# xconnect 10.13.13.13 100 encapsulation mpls
       

      Binds the attachment circuit to a pseudowire VC.

       
      Step 7 exit


      Example:
      Router(config-if-atm-l2trans-pvc)# exit
       

      Exits L2transport PVC configuration mode.

       
      Step 8 exit


      Example:
      Router(config-if)# exit
       

      Exits interface configuration mode.

       
      Step 9 exit


      Example:
      Router(config)# exit
       

      Exits global configuration mode.

       
      Step 10 show mpls l2transport vc


      Example:
      Router# show mpls l2transport vc
       

      Displays output that shows ATM AAL5 over MPLS is configured on a PVC.

       

      Examples

      The following is sample output from the show mpls l2transport vccommand, which shows that ATM AAL5 over MPLS is configured on a PVC: 

      Router# show mpls l2transport vc
Local intf   Local circuit          Dest address      VC ID      Status
---------    -------------          ------------      -----      ------
ATM1/0       ATM AAL5 1/100         10.4.4.4           100        UP

      Configuring ATM AAL5 over MPLS in VC Class Configuration Mode

      You can create a VC class that specifies the AAL5 encapsulation and then attach the encapsulation type to an interface, subinterface, or PVC. The following task creates a VC class and attaches it to a main interface.


      Note

      AAL5 over MPLS is supported only in SDU mode.

      >
      SUMMARY STEPS

        1.    enable

        2.    configure terminal

        3.    vc-class atm vc-class-name

        4.    encapsulation layer-type

        5.    exit

        6.    interface typeslot/port

        7.    class-int vc-class-name

        8.    pvc [name] vpi/vci l2transport

        9.    xconnect peer-router-id vcid encapsulation mpls

        10.    exit

        11.    exit

        12.    exit

        13.    show atm class-links


      DETAILED STEPS
         Command or ActionPurpose
        Step 1 enable


        Example:
        Router> enable
         

        Enables privileged EXEC mode.

        • Enter your password if prompted.
         
        Step 2 configure terminal


        Example:
        Router# configure terminal
         

        Enters global configuration mode.

         
        Step 3 vc-class atm vc-class-name


        Example:
        Router(config)# vc-class atm aal5class
         

        Creates a VC class and enters VC class configuration mode.

         
        Step 4 encapsulation layer-type


        Example:
        Router(config-vc-class)# encapsulation aal5
         

        Configures AAL and the encapsulation type.

         
        Step 5 exit


        Example:
        Router(config-vc-class)# exit
         

        Exits VC class configuration mode.

         
        Step 6 interface typeslot/port


        Example:
        Router(config)# interface atm1/0
         

        Specifies the interface by type, slot, and port number, and enters interface configuration mode.

         
        Step 7 class-int vc-class-name


        Example:
        Router(config-if)# class-int aal5class
         

        Applies a VC class to the ATM main interface or subinterface.

        Note   

        You can also apply a VC class to a PVC.

         
        Step 8 pvc [name] vpi/vci l2transport


        Example:
        Router(config-if)# pvc 1/200 l2transport
         

        Creates or assigns a name to an ATM PVC and enters L2transport PVC configuration mode.

        • The l2transport keyword indicates that the PVC is a switched PVC instead of a terminated PVC.
         
        Step 9 xconnect peer-router-id vcid encapsulation mpls


        Example:
        Router(config-if-atm-l2trans-pvc)# xconnect 10.13.13.13 100 encapsulation mpls
         

        Binds the attachment circuit to a pseudowire VC.

         
        Step 10 exit


        Example:
        Router(config-if-atm-l2trans-pvc)# exit
         

        Exits L2transport PVC configuration mode.

         
        Step 11 exit


        Example:
        Router(config-if)# exit
         

        Exits interface configuration mode.

         
        Step 12 exit


        Example:
        Router(config)# exit
         

        Exits global configuration mode.

         
        Step 13 show atm class-links


        Example:
        Router# show atm class-links
         

        Shows the type of encapsulation and that the VC class was applied to an interface.

         

        Examples

        In the following example, the command output of the show atm class-linkscommand verifies that ATM AAL5 over MPLS is configured as part of a VC class. The command output shows the type of encapsulation and that the VC class was applied to an interface. 

        Router# show atm class-links 1/100
Displaying vc-class inheritance for ATM1/
0.0, vc 1/
100:
no broadcast - Not configured - using default
encapsulation aal5 - VC-class configured on main interface

        Configuring OAM Cell Emulation for ATM AAL5 over MPLS

        If a PE router does not support the transport of Operation, Administration, and Maintenance (OAM) cells across a label switched path (LSP), you can use OAM cell emulation to locally terminate or loop back the OAM cells. You configure OAM cell emulation on both PE routers, which emulates a VC by forming two unidirectional LSPs. You use the oam-ac emulation-enableand oam-pvc managecommands on both PE routers to enable OAM cell emulation.

        After you enable OAM cell emulation on a router, you can configure and manage the ATM VC in the same manner as you would a terminated VC. A VC that has been configured with OAM cell emulation can send loopback cells at configured intervals toward the local CE router. The endpoint can be either of the following:

        • End-to-end loopback, which sends OAM cells to the local CE router.
        • Segment loopback, which responds to OAM cells to a device along the path between the PE and CE routers.

        The OAM cells include the following cells:

        • Alarm indication signal (AIS)
        • Remote defect indication (RDI)

        These cells identify and report defects along a VC. When a physical link or interface failure occurs, intermediate nodes insert OAM AIS cells into all the downstream devices affected by the failure. When a router receives an AIS cell, it marks the ATM VC down and sends an RDI cell to let the remote end know about the failure.

        This section contains two tasks:

        Configuring OAM Cell Emulation for ATM AAL5 over MPLS on PVCs

        Perform this task to configure OAM cell emulation for ATM AAL5 over MPLS on a PVC.


        Note

        For AAL5 over MPLS, you can configure the oam-pvc managecommandonly after you issue the oam-ac emulation-enable command.

        SUMMARY STEPS

          1.    enable

          2.    configure terminal

          3.    interface typeslot /port

          4.    pvc [name] vpi/vci l2transport

          5.    encapsulation aal5

          6.    xconnect peer-router-id vcid encapsulation mpls

          7.    oam-ac emulation-enable [ais-rate]

          8.    oam-pvc manage [frequency]

          9.    exit

          10.    exit

          11.    exit

          12.    show atm pvc


        DETAILED STEPS
           Command or ActionPurpose
          Step 1 enable


          Example:
          Router> enable
           

          Enables privileged EXEC mode.

          • Enter your password if prompted.
           
          Step 2 configure terminal


          Example:
          Router# configure terminal
           

          Enters global configuration mode.

           
          Step 3 interface typeslot /port


          Example:
          Router(config)# interface atm1/0
           

          Specifies the interface by type, slot, and port number, and enters interface configuration mode.

           
          Step 4 pvc [name] vpi/vci l2transport


          Example:
          Router(config-if)# pvc 1/200 l2transport
           

          Creates or assigns a name to an ATM PVC and enters L2transport PVC configuration mode.

          • The l2transport keyword indicates that the PVC is a switched PVC instead of a terminated PVC.
           
          Step 5 encapsulation aal5


          Example:
          Router(config-if-atm-l2trans-pvc)# encapsulation aal5
           

          Specifies ATM AAL5 encapsulation for the PVC.

          • Make sure you specify the same encapsulation type on the PE and CE routers.
           
          Step 6 xconnect peer-router-id vcid encapsulation mpls


          Example:
          Router(config-if-atm-l2trans-pvc)# xconnect 10.13.13.13 100 encapsulation mpls
           

          Binds the attachment circuit to a pseudowire VC.

           
          Step 7 oam-ac emulation-enable [ais-rate]


          Example:
          Router(config-if-atm-l2trans-pvc)# oam-ac emulation-enable 30
           

          Enables OAM cell emulation for AAL5 over MPLS.

          • The ais-rate argument lets you specify the rate at which AIS cells are sent. The default is one cell every second. The range is 0 to 60 seconds.
           
          Step 8 oam-pvc manage [frequency]


          Example:
          Router(config-if-atm-l2trans-pvc)# oam-pvc manage
           

          Enables the PVC to generate end-to-end OAM loopback cells that verify connectivity on the virtual circuit.

          • The optional frequency argument is the interval between transmission of loopback cells and ranges from 0 to 600 seconds. The default value is 10 seconds.
           
          Step 9 exit


          Example:
          Router(config-if-atm-l2trans-pvc)# exit
           

          Exits L2transport PVC configuration mode.

           
          Step 10 exit


          Example:
          Router(config-if)# exit
           

          Exits interface configuration mode.

           
          Step 11 exit


          Example:
          Router(config)# exit
           

          Exits global configuration mode.

           
          Step 12 show atm pvc


          Example:
          Router# show atm pvc
           

          Displays output that shows OAM cell emulation is enabled on the ATM PVC.

           
          Examples

          The output of the show atm pvc command in the following example shows that OAM cell emulation is enabled on the ATM PVC: 

          Router# show atm pvc 5/500
ATM4/1/0.200: VCD: 6, VPI: 5, VCI: 500                    
UBR, PeakRate: 1                                         
AAL5-LLC/SNAP, etype:0x0, Flags: 0x34000C20, VCmode: 0x0 
OAM Cell Emulation: enabled, F5 End2end AIS Xmit frequency: 1 second(s) 
OAM frequency: 0 second(s), OAM retry frequency: 1 second(s)
OAM up retry count: 3, OAM down retry count: 5
OAM Loopback status: OAM Disabled
OAM VC state: Not ManagedVerified
ILMI VC state: Not Managed
InPkts: 564, OutPkts: 560, InBytes: 19792, OutBytes: 19680
InPRoc: 0, OutPRoc: 0
InFast: 4, OutFast: 0, InAS: 560, OutAS: 560
InPktDrops: 0, OutPktDrops: 0
CrcErrors: 0, SarTimeOuts: 0, OverSizedSDUs: 0
Out CLP=1 Pkts: 0
OAM cells received: 26
F5 InEndloop: 0, F5 InSegloop: 0, F5 InAIS: 0, F5 InRDI: 26
OAM cells sent: 77
F5 OutEndloop: 0, F5 OutSegloop: 0, F5 OutAIS: 77, F5 OutRDI: 0 
OAM cell drops: 0
Status: UP

          Configuring OAM Cell Emulation for ATM AAL5 over MPLS in VC Class Configuration Mode

          The following steps explain how to configure OAM cell emulation as part of a VC class. You can then apply the VC class to an interface, a subinterface, or a VC. When you configure OAM cell emulation in VC class configuration mode and then apply the VC class to an interface, the settings in the VC class apply to all the VCs on the interface, unless you specify a different OAM cell emulation value at a lower level, such as the subinterface or VC level. For example, you can create a VC class that specifies OAM cell emulation and sets the rate of AIS cells to every 30 seconds. You can apply the VC class to an interface. Then, for one PVC, you can enable OAM cell emulation and set the rate of AIS cells to every 15 seconds. All the PVCs on the interface use the cell rate of 30 seconds, except for the one PVC that was set to 15 seconds.

          Perform this task to enable OAM cell emulation as part of a VC class and apply it to an interface.


          Note

          For AAL5 over MPLS, you can configure the oam-pvc managecommand only after you issue the oam-ac emulation-enable command.

          SUMMARY STEPS

            1.    enable

            2.    configure terminal

            3.    vc-class atm name

            4.    encapsulation layer-type

            5.    oam-ac emulation-enable [ais-rate]

            6.    oam-pvc manage [frequency]

            7.    exit

            8.    interface typeslot/port

            9.    class-int vc-class-name

            10.    pvc [name] vpi/vci l2transport

            11.    xconnect peer-router-id vcid encapsulation mpls

            12.    end


          DETAILED STEPS
             Command or ActionPurpose
            Step 1 enable


            Example:
            Router> enable
             

            Enables privileged EXEC mode.

            • Enter your password if prompted.
             
            Step 2 configure terminal


            Example:
            Router# configure terminal
             

            Enters global configuration mode.

             
            Step 3 vc-class atm name


            Example:
            Router(config)# vc-class atm oamclass
             

            Creates a VC class and enters VC class configuration mode.

             
            Step 4 encapsulation layer-type


            Example:
            Router(config-vc-class)# encapsulation aal5
             

            Configures the AAL and encapsulation type.

             
            Step 5 oam-ac emulation-enable [ais-rate]


            Example:
            Router(config-vc-class)# oam-ac emulation-enable 30
             

            Enables OAM cell emulation for AAL5 over MPLS.

            • The ais-rate argument lets you specify the rate at which AIS cells are sent. The default is one cell every second. The range is 0 to 60 seconds.
             
            Step 6 oam-pvc manage [frequency]


            Example:
            Router(config-vc-class)# oam-pvc manage
             

            Enables the PVC to generate end-to-end OAM loopback cells that verify connectivity on the virtual circuit.

            • The optional frequency argument is the interval between transmission of loopback cells and ranges from 0 to 600 seconds. The default value is 10 seconds.
             
            Step 7 exit


            Example:
            Router(config-vc-class)# exit
             

            Exits VC class configuration mode.

             
            Step 8 interface typeslot/port


            Example:
            Router(config)# interface atm1/0
             

            Specifies the interface by type, slot, and port number, and enters interface configuration mode.

             
            Step 9 class-int vc-class-name


            Example:
            Router(config-if)# class-int oamclass
             

            Applies a VC class to the ATM main interface or subinterface.

            Note   

            You can also apply a VC class to a PVC.

             
            Step 10 pvc [name] vpi/vci l2transport


            Example:
            Router(config-if)# pvc 1/200 l2transport
             

            Creates or assigns a name to an ATM PVC and enters L2transport PVC configuration mode.

            • The l2transport keyword indicates that the PVC is a switched PVC instead of a terminated PVC.
             
            Step 11 xconnect peer-router-id vcid encapsulation mpls


            Example:
            Router(config-if-atm-l2trans-pvc)# xconnect 10.13.13.13 100 encapsulation mpls
             

            Binds the attachment circuit to a pseudowire VC.

             
            Step 12 end


            Example:
            Router(config-if-atm-l2trans-pvc)# end
             

            Exits L2transport PVC configuration mode and returns to privileged EXEC mode.

             

            Configuring ATM Cell Relay over MPLS in VC Mode

            Perform this task to configure ATM cell relay on the permanent virtual circuits.

            SUMMARY STEPS

              1.    enable

              2.    configure terminal

              3.    interface atm slot /port

              4.    pvc vpi/vci l2transport

              5.    encapsulation aal0

              6.    xconnect peer-router-id vcid encapsulation mpls

              7.    exit

              8.    exit

              9.    exit

              10.    show atm vc


            DETAILED STEPS
               Command or ActionPurpose
              Step 1 enable


              Example:
              Router> enable
               

              Enables privileged EXEC mode.

              • Enter your password if prompted.
               
              Step 2 configure terminal


              Example:
              Router# configure terminal
               

              Enters global configuration mode.

               
              Step 3 interface atm slot /port


              Example:
              Router(config)# interface atm1/0
               

              Specifies an ATM interface and enters interface configuration mode.

               
              Step 4 pvc vpi/vci l2transport


              Example:
              Router(config-if)# pvc 0/100 l2transport
               

              Assigns a virtual path identifier (VPI) and virtual circuit identifier (VCI) and enters L2transport PVC configuration mode.

              • The l2transportkeyword indicates that the PVC is a switched PVC instead of a terminated PVC.
               
              Step 5 encapsulation aal0


              Example:
              Router(config-if-atm-l2trans-pvc)# encapsulation aal0
               

              For ATM cell relay, specifies raw cell encapsulation for the interface.

              • Make sure you specify the same encapsulation type on the PE and CE routers.
               
              Step 6 xconnect peer-router-id vcid encapsulation mpls


              Example:
              Router(config-if-atm-l2trans-pvc)# xconnect 10.13.13.13 100 encapsulation mpls
               

              Binds the attachment circuit to a pseudowire VC.

               
              Step 7 exit


              Example:
              Router(config-if-atm-l2trans-pvc)# exit
               

              Exits L2transport PVC configuration mode.

               
              Step 8 exit


              Example:
              Router(config-if)# exit
               

              Exits interface configuration mode.

               
              Step 9 exit


              Example:
              Router(config)# exit
               

              Exits global configuration mode.

               
              Step 10 show atm vc


              Example:
              Router# show atm vc
               

              Verifies that OAM cell emulation is enabled on the ATM VC.

               

              Examples

              The output of the show atm vc command shows that the interface is configured for VC mode cell relay: 

              Router# show atm vc 7
ATM3/0: VCD: 7, VPI: 23, VCI: 100
UBR, PeakRate: 149760
AAL0-Cell Relay, etype:0x10, Flags: 0x10000C2D, VCmode: 0x0
OAM Cell Emulation: not configured
InBytes: 0, OutBytes: 0
Status: UP

              Configuring ATM Cell Relay over MPLS in VC Mode Using VC Class Configuration Mode

              You can create a VC class that specifies the ATM cell relay encapsulation and then attach the VC class to an interface, subinterface, or VC. The following task creates a VC class that specifies the ATM cell relay encapsulation and attaches it to a main interface.


              Note

              You can configure VC class configuration mode only in VC mode. VC class configuration mode is not supported on VP or port mode.

              SUMMARY STEPS

                1.    enable

                2.    configure terminal

                3.    vc-class atm name

                4.    encapsulation layer-type

                5.    exit

                6.    interface typeslot /port

                7.    class-int vc-class-name

                8.    pvc [name] vpi/vci l2transport

                9.    xconnect peer-router-id vcid encapsulation mpls

                10.    end


              DETAILED STEPS
                 Command or ActionPurpose
                Step 1 enable


                Example:
                Router> enable
                 

                Enables privileged EXEC mode.

                • Enter your password if prompted.
                 
                Step 2 configure terminal


                Example:
                Router# configure terminal
                 

                Enters global configuration mode.

                 
                Step 3 vc-class atm name


                Example:
                Router(config)# vc-class atm cellrelay
                 

                Creates a VC class and enters VC class configuration mode.

                 
                Step 4 encapsulation layer-type


                Example:
                Router(config-vc-class)# encapsulation aal0
                 

                Configures the AAL and encapsulation type.

                 
                Step 5 exit


                Example:
                Router(config-vc-class)# exit
                 

                Exits VC class configuration mode.

                 
                Step 6 interface typeslot /port


                Example:
                Router(config)# interface atm1/0
                 

                Specifies the interface by type, slot, and port number, and enters interface configuration mode.

                 
                Step 7 class-int vc-class-name


                Example:
                Router(config-if)# class-int cellrelay
                 

                Applies a VC class to the ATM main interface or subinterface.

                Note   

                You can also apply a VC class to a PVC.

                 
                Step 8 pvc [name] vpi/vci l2transport


                Example:
                Router(config-if)# pvc 1/200 l2transport
                 

                Creates or assigns a name to an ATM PVC and enters L2transport PVC configuration mode.

                • The l2transport keyword indicates that the PVC is a switched PVC instead of a terminated PVC.
                 
                Step 9 xconnect peer-router-id vcid encapsulation mpls


                Example:
                Router(config-if-atm-l2trans-pvc)# xconnect 10.13.13.13 100 encapsulation mpls
                 

                Binds the attachment circuit to a pseudowire VC.

                 
                Step 10 end


                Example:
                Router(config-if-atm-l2trans-pvc)# end
                 

                Exits L2transport PVC configuration mode and returns to privileged EXEC mode.

                 

                Configuring ATM Cell Relay over MPLS in PVP Mode

                VP mode allows cells coming into a predefined PVP on the ATM interface to be transported over the MPLS backbone to a predefined PVP on the egress ATM interface. You can use VP mode to send single cells or packed cells over the MPLS backbone.

                To configure VP mode, you must specify the following:

                • The VP for transporting cell relay cells.
                • The IP address of the peer PE router and the VC ID.

                When configuring ATM cell relay over MPLS in VP mode, use the following guidelines:

                • You do not need to enter the encapsulation aal0 command in VP mode.
                • One ATM interface can accommodate multiple types of ATM connections. VP cell relay, VC cell relay, and ATM AAL5 over MPLS can coexist on one ATM interface. On the Cisco 12000 series router, this is true only on the engine 0 ATM line cards.
                • If a VPI is configured for VP cell relay, you cannot configure a PVC using the same VPI.
                • VP trunking (mapping multiple VPs to one emulated VC label) is not supported. Each VP is mapped to one emulated VC.
                • Each VP is associated with one unique emulated VC ID. The AToM emulated VC type is ATM VP cell transport.
                • The AToM control word is supported. However, if a peer PE does not support the control word, it is disabled. This negotiation is done by LDP label binding.
                • VP mode (and VC mode) drop idle cells.

                Perform this task to configure ATM cell relay in PVP mode.

                SUMMARY STEPS

                  1.    enable

                  2.    configure terminal

                  3.    interface atm slot /port

                  4.    atm pvp vpi l2transport

                  5.    xconnect peer-router-id vcid encapsulation mpls

                  6.    exit

                  7.    exit

                  8.    exit

                  9.    show atm vp


                DETAILED STEPS
                   Command or ActionPurpose
                  Step 1 enable


                  Example:
                  Router> enable
                   

                  Enables privileged EXEC mode.

                  • Enter your password if prompted.
                   
                  Step 2 configure terminal


                  Example:
                  Router# configure terminal
                   

                  Enters global configuration mode.

                   
                  Step 3 interface atm slot /port


                  Example:
                  Router(config)# interface atm1/0
                   

                  Defines the interface and enters interface configuration mode.

                   
                  Step 4 atm pvp vpi l2transport


                  Example:
                  Router(config-if)# atm pvp 1 l2transport
                   

                  Specifies that the PVP is dedicated to transporting ATM cells and enters L2transport PVP configuration mode.

                  • The l2transport keyword indicates that the PVP is for cell relay. This mode is for Layer 2 transport only; it is not for regular PVPs.
                   
                  Step 5 xconnect peer-router-id vcid encapsulation mpls


                  Example:
                  Router(config-if-atm-l2trans-pvp)# xconnect 10.0.0.1 123 encapsulation mpls
                   

                  Binds the attachment circuit to a pseudowire VC.

                  • The syntax for this command is the same as for all other Layer 2 transports.
                   
                  Step 6 exit


                  Example:
                  Router(config-if-atm-l2trans-pvP)# exit
                   

                  Exits L2 transport PVP configuration mode.

                   
                  Step 7 exit


                  Example:
                  Router(config-if)# exit
                   

                  Exits interface configuration mode.

                   
                  Step 8 exit


                  Example:
                  Router(config)# exit
                   

                  Exits global configuration mode.

                   
                  Step 9 show atm vp


                  Example:
                  Router# show atm vp
                   

                  Displays output that shows OAM cell emulation is enabled on the ATM VP.

                   

                  Examples

                  The following show atm vp command in the following example shows that the interface is configured for VP mode cell relay: 

                  Router# show atm vp 1
ATM5/0  VPI: 1, Cell Relay, PeakRate: 149760, CesRate: 0, DataVCs: 1, CesVCs: 0, Status: ACTIVE
  VCD    VCI   Type   InPkts   OutPkts   AAL/Encap     Status
  6      3     PVC    0        0         F4 OAM        ACTIVE  
  7      4     PVC    0        0         F4 OAM        ACTIVE  
TotalInPkts: 0, TotalOutPkts: 0, TotalInFast: 0, TotalOutFast: 0,
TotalBroadcasts: 0 TotalInPktDrops: 0, TotalOutPktDrops: 0

                  Configuring ATM Cell Relay over MPLS in Port Mode

                  Port mode cell relay allows cells coming into an ATM interface to be packed into an MPLS packet and transported over the MPLS backbone to an egress ATM interface.

                  To configure port mode, issue the xconnect command from an ATM main interface and specify the destination address and the VC ID. The syntax of the xconnect command is the same as for all other transport types. Each ATM port is associated with one unique pseudowire VC label.

                  When configuring ATM cell relay over MPLS in port mode, use the following guidelines:

                  • The pseudowire VC type is set to ATM transparent cell transport (AAL0).
                  • The AToM control word is supported. However, if the peer PE does not support a control word, the control word is disabled. This negotiation is done by LDP label binding.

                  Note

                  The AToM control word is not supported for port mode cell relay on Cisco 7600 series routers.

                  • Port mode and VP and VC mode are mutually exclusive. If you enable an ATM main interface for cell relay, you cannot enter any PVP or PVC commands.
                  • If the pseudowire VC label is withdrawn due to an MPLS core network failure, the PE router sends a line AIS to the CE router.
                  • For the Cisco 7600 series routers, you must specify the interface ATM slot, bay, and port for the SIP400 or SIP200.
                  SUMMARY STEPS

                    1.    enable

                    2.    configure terminal

                    3.    interface atm slot /port

                    4.    xconnect peer-router-id vcid encapsulation mpls

                    5.    exit

                    6.    exit

                    7.    show atm route

                    8.    show mpls l2transport vc


                  DETAILED STEPS
                     Command or ActionPurpose
                    Step 1 enable


                    Example:
                    Router> enable
                     

                    Enables privileged EXEC mode.

                    • Enter your password if prompted.
                     
                    Step 2 configure terminal


                    Example:
                    Router# configure terminal
                     

                    Enters global configuration mode.

                     
                    Step 3 interface atm slot /port


                    Example:
                    or interface atm slot/bay/port


                    Example:
                    Router(config)# interface atm1/0


                    Example:
                    or


                    Example:
                    Router(config)# interface atm4/3/0
                     

                    Specifies an ATM interface and enters interface configuration mode.

                    • For the Cisco 7600 series routers, you must specify the interface ATM slot, bay, and port for the SIP400 or SIP200. In the example the slot is 4, the bay is 3, and the port is 0.
                     
                    Step 4 xconnect peer-router-id vcid encapsulation mpls


                    Example:
                    Router(config-if)# xconnect 10.0.0.1 123 encapsulation mpls
                     

                    Binds the attachment circuit to the interface.

                     
                    Step 5 exit


                    Example:
                    Router(config-if)# exit
                     

                    Exits interface configuration mode.

                     
                    Step 6 exit


                    Example:
                    Router(config)# exit
                     

                    Exits global configuration mode.

                     
                    Step 7 show atm route


                    Example:
                    Router# show atm route
                     

                    Displays output that shows ATM cell relay in port mode has been enabled.

                     
                    Step 8 show mpls l2transport vc


                    Example:
                    Router# show mpls l2transport vc
                     

                    Displays the attachment circuit and the interface.

                     

                    Examples

                    The show atm route command in the following example displays port mode cell relay state. The following example shows that atm interface 1/0 is for cell relay, the VC ID is 123 and the tunnel is down. 

                    Router# show atm route
Input Intf        Output Intf     Output VC       Status
ATM1/0            ATOM Tunnel     123             DOWN

                    The show mpls l2transport vc command in the following example also shows configuration information: 

                    Router# show mpls l2transport vc
Local intf     Local circuit        Dest address    VC ID      Status    
-------------  -------------------- --------------- ---------- ----------
AT1/0          ATM CELL ATM1/0      10.1.1.121     1121       UP

                    Troubleshooting Tips

                    The debug atm l2transport and debug mpls l2transport vcdisplay troubleshooting information.

                    Configuring ATM Single Cell Relay over MPLS

                    The single cell relay feature allows you to insert one ATM cell in each MPLS packet. You can use single cell relay in both VP and VC mode. The configuration steps show how to configure single cell relay in VC mode. For VP mode, see the Configuring ATM Cell Relay over MPLS in PVP Mode.

                    SUMMARY STEPS

                      1.    enable

                      2.    configure terminal

                      3.    interface atm slot/port

                      4.    pvc vpi/vci l2transport

                      5.    encapsulation aal0

                      6.    xconnect peer-router-id vcid encapsulation mpls

                      7.    end


                    DETAILED STEPS
                       Command or ActionPurpose
                      Step 1 enable


                      Example:
                      Router> enable
                       

                      Enables privileged EXEC mode.

                      • Enter your password if prompted.
                       
                      Step 2 configure terminal


                      Example:
                      Router# configure terminal
                       

                      Enters global configuration mode.

                       
                      Step 3 interface atm slot/port


                      Example:
                      Router(config)# interface atm1/0
                       

                      Specifies an ATM interface and enters interface configuration mode.

                       
                      Step 4 pvc vpi/vci l2transport


                      Example:
                      Router(config-if)# pvc 1/100 l2transport
                       

                      Assigns a VPI and VCI and enters L2transport PVC configuration mode.

                      • The l2transport keyword indicates that the PVC is a switched PVC instead of a terminated PVC.
                       
                      Step 5 encapsulation aal0


                      Example:
                      Router(config-if-atm-l2trans-pvc)# encapsulation aal0
                       

                      Specifies raw cell encapsulation for the interface.

                      • Make sure you specify the same encapsulation type on the PE and CE routers.
                       
                      Step 6 xconnect peer-router-id vcid encapsulation mpls


                      Example:
                      Router(config-if-atm-l2trans-pvc)# xconnect 10.0.0.1 123 encapsulation mpls
                       

                      Binds the attachment circuit to a pseudowire VC.

                       
                      Step 7 end


                      Example:
                      Router(config-if-atm-l2trans-pvc)# end
                       

                      Exits L2transport PVC configuration mode and returns to privileged EXEC mode.

                       

                      Configuring ATM Packed Cell Relay over MPLS

                      The packed cell relay feature allows you to insert multiple concatenated ATM cells in an MPLS packet. The packed cell relay feature is more efficient than single cell relay, because each ATM cell is 52 bytes, and each AToM packet is at least 64 bytes.

                      At a high level, packed cell relay configuration consists of the following steps:

                      1. You specify the amount of time a PE router can wait for cells to be packed into an MPLS packet. You can set up three timers by default with different amounts of time attributed to each timer.
                      2. You enable packed cell relay, specify how many cells should be packed into each MPLS packet, and choose which timer to use during the cell packing process.

                      Restrictions

                      • The cell-packingcommand is available only if you use AAL0 encapsulation in VC mode. If the command is configured with ATM AAL5 encapsulation, the command is not valid.
                      • Only cells from the same VC, VP, or port can be packed into one MPLS packet. Cells from different connections cannot be concatenated into the same MPLS packet.
                      • When you change, enable, or disable the cell-packing attributes, the ATM VC, VP, or port and the MPLS emulated VC are reestablished.
                      • If a PE router does not support packed cell relay, the PE router sends only one cell per MPLS packet.
                      • The number of packed cells does not need to match between the PE routers. The two PE routers agree on the lower of the two values. For example, if PE1 is allowed to pack 10 cells per MPLS packet and PE2 is allowed to pack 20 cells per MPLS packet, the two PE routers would agree to send no more than 10 cells per packet.
                      • If the number of cells packed by the peer PE router exceeds the limit, the packet is dropped.
                      • Issue the atm mcpt-timerscommand on an ATM interface before issuing the cell-packingcommand.

                      See the following sections for configuration information:

                      Configuring ATM Packed Cell Relay over MPLS in VC Mode

                      Perform this task to configure the ATM packed cell relay over MPLS feature in VC mode.

                      SUMMARY STEPS

                        1.    enable

                        2.    configure terminal

                        3.    interface atm slot /port

                        4.    shutdown

                        5.    atm mcpt-timers [timer1-timeout timer2-timeout timer3-timeout]

                        6.    no shutdown

                        7.    pvc vpi/vci l2transport

                        8.    encapsulation aal0

                        9.    xconnect peer-router-id vcid encapsulation mpls

                        10.    cell-packing cells mcpt-timer timer

                        11.    end


                      DETAILED STEPS
                         Command or ActionPurpose
                        Step 1 enable


                        Example:
                        Router> enable
                         

                        Enables privileged EXEC mode.

                        • Enter your password if prompted.
                         
                        Step 2 configure terminal


                        Example:
                        Router# configure terminal
                         

                        Enters global configuration mode.

                         
                        Step 3 interface atm slot /port


                        Example:
                        Router(config)# interface atm1/0
                         

                        Defines the interface and enters interface configuration mode.

                         
                        Step 4 shutdown


                        Example:
                        Router(config-if)# shutdown
                         

                        Shuts down the interface.

                         
                        Step 5 atm mcpt-timers [timer1-timeout timer2-timeout timer3-timeout]


                        Example:
                        Router(config-if)# atm mcpt-timers 100 200 250


                        Example:
                        

        
                        
 
                              		 
          
                        
Sets up the cell-packing timers, which specify how long the PE router can wait for cells to be packed into an MPLS packet.
                        

          
                        • 
You can set up to three timers. For each timer, you specify the maximum cell-packing timeout (MCPT). This value gives the cell-packing function a limited amount of time to complete. If the timer expires before the maximum number of cells are packed into an AToM packet, the packet is sent anyway. The timeout’s default and range of acceptable values depends on the ATM link speed. 

                          • 

                        • 
The respective default values for the PA-A3 port adapters are:
                          • 
OC-3: 30, 60, and 90 microseconds
                            • 

                          • 
T3: 100, 200, and 300 microseconds
                            • 

                          • 
E3: 130, 260, and 390 microseconds
                            • 

                          

                          

                          • 

                        • 
You can specify either the number of microseconds or use the default. 

                          • 

                        • 
The respective range of values for the PA-A3 port adapters are:
                          • 
OC-3: 10 to 4095 microseconds
                            • 

                          • 
T3: 30 to 4095 microseconds
                            • 

                          • 
E3: 40 to 4095 microseconds
                            • 

                          

                          

                          • 

                        

         
      
                        

                        Step 6
          
            no
            shutdown
          
        
                         

                        Example:
                        
          
                        Router(config-if)# no shutdown
                        

        
                        
 
                              		 
          
                        
Enables the interface.
                        

         
      
                        

                        Step 7
          
            pvc
          
          
            vpi/vci
          
          
            l2transport
          
        
                         

                        Example:
                        
          
                        Router(config-if)# pvc 1/100 l2transport
                        

        
                        
 
                              		 
          
                        
Assigns a VPI and VCI and enters L2transport PVC configuration mode. 
                        

          
                        • 
The l2transport keyword indicates that the PVC is a switched PVC instead of a terminated PVC. 

                          • 

                        

         
      
                        

                        Step 8
          
            encapsulation
            aal0
          
        
                         

                        Example:
                        
          
                        Router(config-if-atm-l2trans-pvc)# encapsulation aal0
                        

        
                        
 
                              		 
          
                        
Specifies raw cell encapsulation for the interface. 
                        

          
                        • 
Make sure you specify the same encapsulation type on the PE routers. 

                          • 

                        

         
      
                        

                        Step 9
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                         

                        Example:
                        
          
                        Router(config-if-atm-l2trans-pvc)# xconnect 10.0.0.1 123 encapsulation mpls 
                        

        
                        
 
                              		 
          
                        
Binds the attachment circuit to a pseudowire VC. 
                        

         
      
                        

                        Step 10
          
            cell-packing
          
          
            cells
          
          
            
            
            mcpt-timer
          
          
            timer
          
        
                         

                        Example:
                        
          
                        Router(config-if-atm-l2trans-pvc)# cell-packing 10 mcpt-timer 1
                        

        
                        
 

                        Example:
                        
          
                        

        
                        
 
                              		 
          
                        
Enables cell packing and specifies the cell-packing parameters.
                        

          
                        • 
The cellsargument represents the maximum number of cells to be packed into an MPLS packet. The range is from 2 to the MTU of the interface divided by 52. The default is MTU/52.

                          • 

                        • 
The timerargument allows you to specify which timer to use. The default is timer 1. 

                          • 

                        • 
See the cell-packing command page for more information. 

                          • 

                        

         
      
                        

                        Step 11
          
            end
          
        
                         

                        Example:
                        
          
                        Router(config-if-atm-l2trans-pvc)# end
                        

        
                        
 
                              		 
          
                        
Exits L2transport PVC configuration mode and returns to privileged EXEC mode.
                        

         
      
                        

                        

                        

                        

                        Configuring ATM Packed Cell Relay over MPLS in VC Mode Using VC Class Configuration Mode
                        

                        
      
                        
You can create a VC class that specifies the ATM cell relay encapsulation and the cell packing parameters and then attach the VC class to an interface, subinterface, or VC. The following task creates a VC class that specifies the ATM cell relay encapsulation and cell packing and attaches it to a main interface. 
                        

      

                        Note
                        
You can configure VC class configuration mode only in VC mode. VC class configuration mode is not supported on VP or port mode. 
                        

                        

      
                        
When you configure cell packing in VC class configuration mode and then apply the VC class to an interface, the settings in the VC class apply to all the VCs on the interface, unless you specify a different cell packing value at a lower level, such as the subinterface or VC level. For example, you can create a VC class that specifies three cells to be packed. You can apply the VC class to an interface. Then, for one PVC, you can specify two cells to be packed. All the PVCs on the interface pack three cells, except for the one PVC that was set to set two cells. 
                        

    
                        
SUMMARY STEPS
                          1.   
      
          
            enable
          
        
                          

                          2.   
      
          
            configure
          
          
            terminal
          
        
                          

                          3.   
      
          
            vc-class
            atm
          
          
            name
          
        
                          

                          4.   
      
          
            encapsulation
          
          
            
            
          
          
            layer-type
          
        
                          

                          5.   
      
          
            cell-packing
          
          
            cells
          
          
            mcpt-timer
          
          
            timer
          
        
                          

                          6.   
      
          
            exit
          
        
                          

                          7.   
      
          
            interface
          
          
            typeslot
          /port
                          

                          8.   
      
          
            shutdown
          
        
                          

                          9.   
      
          
            atm
            mcpt-timers
           [timer1-timeout timer2-timeout timer3-timeout]
                          

                          10.   
      
          
            no
            shutdown
          
        
                          

                          11.   
      
          
            class-int
          
          
            
            
          
          
            vc-class-name
          
          
            
            
          
        
                          

                          12.   
      
          
            pvc
           
[name]
 vpi/vci l2transport
                          

                          13.   
      
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                          

                          14.   
      
          
            end
          
        
                          


                        DETAILED STEPS
                           Command or ActionPurpose
                          Step 1
          
            enable
          
        
                           

                          Example:
                          
          
                          Router> enable
                          

        
                          
 
                                		 
          
                          
Enables privileged EXEC mode. 
                          

          
                          • 
Enter your password if prompted.

                            • 

                          

         
      
                          

                          Step 2
          
            configure
          
          
            terminal
          
        
                           

                          Example:
                          
          
                          Router# configure terminal
                          

        
                          
 
                                		 
          
                          
Enters global configuration mode.
                          

         
      
                          

                          Step 3
          
            vc-class
            atm
          
          
            name
          
        
                           

                          Example:
                          
          
                          Router(config)# vc-class atm cellpacking
                          

        
                          
 
                                		 
          
                          
Creates a VC class and enters VC class configuration mode.
                          

         
      
                          

                          Step 4
          
            encapsulation
          
          
            
            
          
          
            layer-type
          
        
                           

                          Example:
                          
          
                          Router(config-vc-class)# encapsulation aal0
                          

        
                          
 
                                		 
          
                          
Configures the AAL and encapsulation type. 
                          

         
      
                          

                          Step 5
          
            cell-packing
          
          
            cells
          
          
            mcpt-timer
          
          
            timer
          
        
                           

                          Example:
                          
          
                          Router(config-vc-class)# cell-packing 10 mcpt-timer 1
                          

        
                          
 

                          Example:
                          
          
                          

        
                          
 
                                		 
          
                          
Enables cell packing and specifies the cell-packing parameters.
                          

          
                          • 
The cellsargument represents the maximum number of cells to be packed into an MPLS packet. The range is from 2 to the MTU of the interface divided by 52. The default is MTU/52.

                            • 

                          • 
The timerargument allows you to specify which timer to use. The default is timer 1. 

                            • 

                          • 
See the cell-packing command page for more information. 

                            • 

                          

         
      
                          

                          Step 6
          
            exit
          
        
                           

                          Example:
                          
          
                          Router(config-vc-class)# exit
                          

        
                          
 
                                		 
          
                          
Exits VC class configuration mode.
                          

         
      
                          

                          Step 7
          
            interface
          
          
            typeslot
          /port
                           

                          Example:
                          
          
                          Router(config)# interface atm1/0
                          

        
                          
 
                                		 
          
                          
Specifies the interface by type, slot, and port number, and enters interface configuration mode.
                          

         
      
                          

                          Step 8
          
            shutdown
          
        
                           

                          Example:
                          
          
                          Router(config-if)# shutdown
                          

        
                          
 
                                		 
          
                          
Shuts down the interface.
                          

         
      
                          

                          Step 9
          
            atm
            mcpt-timers
           [timer1-timeout timer2-timeout timer3-timeout]
                           

                          Example:
                          
          
                          Router(config-if)# atm mcpt-timers 100 200 250
                          

        
                          
 

                          Example:
                          
          
                          

        
                          
 
                                		 
          
                          
Sets up the cell-packing timers, which specify how long the PE router can wait for cells to be packed into an MPLS packet.
                          

          
                          • 
You can set up to three timers. For each timer, you specify the MCPT. This value gives the cell-packing function a limited amount of time to complete. If the timer expires before the maximum number of cells are packed into an AToM packet, the packet is sent anyway. The timeout’s default and range of acceptable values depends on the ATM link speed. 

                            • 

                          • 
The respective default values for the PA-A3 port adapters are:
                            • 
OC-3: 30, 60, and 90 microseconds
                              • 

                            • 
T3: 100, 200, and 300 microseconds
                              • 

                            • 
E3: 130, 260, and 390 microseconds
                              • 

                            

                            

                            • 

                          • 
You can specify either the number of microseconds or use the default. 

                            • 

                          • 
The respective range of values for the PA-A3 port adapters are:
                            • 
OC-3: 10 to 4095 microseconds
                              • 

                            • 
T3: 30 to 4095 microseconds
                              • 

                            • 
E3: 40 to 4095 microseconds
                              • 

                            

                            

                            • 

                          

         
      
                          

                          Step 10
          
            no
            shutdown
          
        
                           

                          Example:
                          
          
                          Router(config-if)# no shutdown
                          

        
                          
 
                                		 
          
                          
Enables the interface.
                          

         
      
                          

                          Step 11
          
            class-int
          
          
            
            
          
          
            vc-class-name
          
          
            
            
          
        
                           

                          Example:
                          
          
                          Router(config-if)# class-int cellpacking
                          

        
                          
 
                                		 
          
                          
Applies a VC class to the ATM main interface or subinterface. 
                          

          
                          Note   
                
              
                          
You can also apply a VC class to a PVC. 
                          

                          

         
      
                          

                          Step 12
          
            pvc
           
[name]
 vpi/vci l2transport
                           

                          Example:
                          
          
                          Router(config-if)# pvc 1/200 l2transport
                          

        
                          
 
                                		 
          
                          
Creates or assigns a name to an ATM PVC and enters L2transport PVC configuration mode.
                          

          
                          • 
The l2transport keyword indicates that the PVC is a switched PVC instead of a terminated PVC. 

                            • 

                          

         
      
                          

                          Step 13
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                           

                          Example:
                          
          
                          Router(config-if-atm-l2trans-pvc)# xconnect 10.13.13.13 100 encapsulation mpls
                          

        
                          
 
                                		 
          
                          
Binds the attachment circuit to a pseudowire VC. 
                          

         
      
                          

                          Step 14
          
            end
          
        
                           

                          Example:
                          
          
                          Router(config-if-atm-l2trans-pvc)# end
                          

        
                          
 
                                		 
          
                          
Exits L2transport PVC configuration mode and returns to privileged EXEC mode.
                          

         
      
                          

                          

                          

                          

                          Configuring ATM Packed Cell Relay over MPLS in VP Mode
                          

                          
      
                          
Perform this task to configure the ATM cell-packing feature in VP mode. 
                          

    
                          
SUMMARY STEPS
                            1.   
      
          
            enable
          
        
                            

                            2.   
      
          
            configure
          
          
            terminal
          
        
                            

                            3.   
      
          
            interface
          
          
            atm
          
          
            slot
          /port
                            

                            4.   
      
          
            shutdown
          
        
                            

                            5.   
      
          
            atm
            mcpt-timers
           [timer1-timeout timer2-timeout timer3-timeout]
                            

                            6.   
      
          
            no
            shutdown
          
        
                            

                            7.   
      
          
            atm
            pvp
          
          
            vpi
          
          
            
            
          
          
            l2transport
          
        
                            

                            8.   
      
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                            

                            9.   
      
          
            cell-packing
          
          
            cells
          
          
            mcpt-timer
          
          
            timer
          
        
                            

                            10.   
      
          
            end
          
        
                            


                          DETAILED STEPS
                             Command or ActionPurpose
                            Step 1
          
            enable
          
        
                             

                            Example:
                            
          
                            Router> enable
                            

        
                            
 
                                  		 
          
                            
Enables privileged EXEC mode. 
                            

          
                            • 
Enter your password if prompted.

                              • 

                            

         
      
                            

                            Step 2
          
            configure
          
          
            terminal
          
        
                             

                            Example:
                            
          
                            Router# configure terminal
                            

        
                            
 
                                  		 
          
                            
Enters global configuration mode.
                            

         
      
                            

                            Step 3
          
            interface
          
          
            atm
          
          
            slot
          /port
                             

                            Example:
                            
          
                            Router(config)# interface atm1/0
                            

        
                            
 
                                  		 
          
                            
Defines the interface and enters interface configuration mode. 
                            

         
      
                            

                            Step 4
          
            shutdown
          
        
                             

                            Example:
                            
          
                            Router(config-if)# shutdown
                            

        
                            
 
                                  		 
          
                            
Shuts down the interface.
                            

         
      
                            

                            Step 5
          
            atm
            mcpt-timers
           [timer1-timeout timer2-timeout timer3-timeout]
                             

                            Example:
                            
          
                            Router(config-if)# atm mcpt-timers 100 200 250
                            

        
                            
 

                            Example:
                            
          
                            

        
                            
 
                                  		 
          
                            
Sets up the cell-packing timers, which specify how long the PE router can wait for cells to be packed into an MPLS packet.
                            

          
                            • 
You can set up to three timers. For each timer, you specify the MCPT. This value gives the cell-packing function a limited amount of time to complete. If the timer expires before the maximum number of cells are packed into an AToM packet, the packet is sent anyway. The timeout’s default and range of acceptable values depends on the ATM link speed. 

                              • 

                            • 
The respective default values for the PA-A3 port adapters are:
                              • 
OC-3: 30, 60, and 90 microseconds
                                • 

                              • 
T3: 100, 200, and 300 microseconds
                                • 

                              • 
E3: 130, 260, and 390 microseconds
                                • 

                              

                              

                              • 

                            • 
You can specify either the number of microseconds or use the default. 

                              • 

                            • 
The respective range of values for the PA-A3 port adapters are:
                              • 
OC-3: 10 to 4095 microseconds
                                • 

                              • 
T3: 30 to 4095 microseconds
                                • 

                              • 
E3: 40 to 4095 microseconds
                                • 

                              

                              

                              • 

                            

         
      
                            

                            Step 6
          
            no
            shutdown
          
        
                             

                            Example:
                            
          
                            Router(config-if)# no shutdown
                            

        
                            
 
                                  		 
          
                            
Enables the interface.
                            

         
      
                            

                            Step 7
          
            atm
            pvp
          
          
            vpi
          
          
            
            
          
          
            l2transport
          
        
                             

                            Example:
                            
          
                            Router(config-if)# atm pvp 1 l2transport
                            

        
                            
 
                                  		 
          
                            
Specifies that the PVP is dedicated to transporting ATM cells and enters L2transport PVP configuration mode. 
                            

          
                            • 
The l2transport keyword indicates that the PVP is for cell relay. This mode is for Layer 2 transport only; it is not for regular PVPs.

                              • 

                            

         
      
                            

                            Step 8
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                             

                            Example:
                            
          
                            Router(cfg-if-atm-l2trans-pvp)# xconnect 10.0.0.1 123 encapsulation mpls 
                            

        
                            
 
                                  		 
          
                            
Binds the attachment circuit to a pseudowire VC. 
                            

          
                            • 
The syntax for this command is the same as for all other 
Layer 2 transports. 

                              • 

                            

         
      
                            

                            Step 9
          
            cell-packing
          
          
            cells
          
          
            mcpt-timer
          
          
            timer
          
        
                             

                            Example:
                            
          
                            Router(cfg-if-atm-l2trans-pvp)# cell-packing 10 mcpt-timer 1
                            

        
                            
 

                            Example:
                            
          
                            

        
                            
 
                                  		 
          
                            
Enables cell packing and specifies the cell-packing parameters.
                            

          
                            • 
The cellsargument represents the maximum number of cells to be packed into an MPLS packet. The range is from 2 to the MTU of the interface divided by 52. The default is MTU/52.

                              • 

                            • 
The timerargument allows you to specify which timer to use. The default is timer 1. 

                              • 

                            • 
See the cell-packing command page for more information. 

                              • 

                            

         
      
                            

                            Step 10
          
            end
          
        
                             

                            Example:
                            
          
                            Router(config-if-atm-l2trans-pvc)# end
                            

        
                            
 
                                  		 
          
                            
Exits L2transport PVC configuration mode and returns to privileged EXEC mode.
                            

         
      
                            

                            

                            

                            

                            Configuring ATM Packed Cell Relay over MPLS in Port Mode
                            

                             
		
                             Perform this task to configure ATM packed cell relay over MPLS in port mode. 
		
                            
 
	 
                            
SUMMARY STEPS
                              1.   
       
			  
				enable 
			  
		  
                              

                              2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                              

                              3.   
       
			  
				interface 
			  
			  
				atm 
			  
			  
				slot 
			 /port
		  
                              

                              4.   
       
			  
				shutdown 
			  
		  
                              

                              5.   
       
			  
				atm 
				mcpt-timers 
			 [timer1-timeout 
				timer2-timeout 
				timer3-timeout]
		  
                              

                              6.   
       
			  
				no 
				shutdown 
			  
		  
                              

                              7.   
       
			  
				cell-packing 
			  
			  
				cells 
			  
			  
				mcpt-timer 
			  
			  
				timer 
			  
		  
                              

                              8.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                              

                              9.   
       
			  
				exit 
			  
		  
                              

                              10.   
       
			  
				exit 
			  
		  
                              

                              11.   
       
			  
				show 
				atm 
				cell-packing 
			  
		  
                              

                              12.   
       
			  
				show 
				atm 
				vp 
			  
		  
                              


                            DETAILED STEPS
                               Command or ActionPurpose
                              Step 1 
			  
				enable 
			  
		  
                               

                              Example:
                               
			 
                              Router> enable
                              
 
		  
                              
 
                                    		  
			 
                               Enables privileged EXEC mode. 
			 
                              
 
			 
                              •  Enter your password if prompted.
				

                                • 

                              
 
		   
      
                              

                              Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                               

                              Example:
                               
			 
                              Router# configure terminal
                              
 
		  
                              
 
                                    		  
			 
                               Enters global configuration mode.
			 
                              
 
		   
      
                              

                              Step 3 
			  
				interface 
			  
			  
				atm 
			  
			  
				slot 
			 /port
		  
                               

                              Example:
                               
			 
                              Router(config)# interface atm1/0
                              
 
		  
                              
 
                                    		  
			 
                               Specifies an ATM interface and enters interface configuration mode. 
			 
                              
 
		   
      
                              

                              Step 4 
			  
				shutdown 
			  
		  
                               

                              Example:
                               
			 
                              Router(config-if)# shutdown
                              
 
		  
                              
 
                                    		  
			 
                               Shuts down the interface.
			 
                              
 
		   
      
                              

                              Step 5 
			  
				atm 
				mcpt-timers 
			 [timer1-timeout 
				timer2-timeout 
				timer3-timeout]
		  
                               

                              Example:
                               
			 
                              Router(config-if)# atm mcpt-timers 100 200 250
                              
 
		  
                              
 
                                    		  
			 
                               Sets up the cell-packing timers, which specify how long the PE router can wait for cells to be packed into an MPLS packet.
			 
                              
 
			 
                              •  You can set up to three timers. For each timer, you specify the MCPT. This value gives the cell-packing function a limited amount of time to complete. If the timer expires before the maximum number of cells are packed into an AToM packet, the packet is sent anyway. The timeout’s default and range of acceptable values depends on the ATM link speed. 
				

                                • 

                              •  The respective default values for the PA-A3 port adapters are:
				  
                                •  OC-3: 30, 60, and 90 microseconds
					 
                                  • 

                                •  T3: 100, 200, and 300 microseconds
					 
                                  • 

                                •  E3: 130, 260, and 390 microseconds
					 
                                  • 

                                

				
                                

                                • 

                              •  You can specify either the number of microseconds or use the default. 
				

                                • 

                              •  The respective range of values for the PA-A3 port adapters are:
				  
                                •  OC-3: 10 to 4095 microseconds
					 
                                  • 

                                •  T3: 30 to 4095 microseconds
					 
                                  • 

                                •  E3: 40 to 4095 microseconds
					 
                                  • 

                                

				
                                

                                • 

                              
 
		   
      
                              

                              Step 6 
			  
				no 
				shutdown 
			  
		  
                               

                              Example:
                               
			 
                              Router(config-if)# no shutdown
                              
 
		  
                              
 
                                    		  
			 
                               Enables the interface.
			 
                              
 
		   
      
                              

                              Step 7 
			  
				cell-packing 
			  
			  
				cells 
			  
			  
				mcpt-timer 
			  
			  
				timer 
			  
		  
                               

                              Example:
                               
			 
                              Router(config-if)# cell-packing 10 mcpt-timer 1
                              
 
		  
                              
 

                              Example:
                               
			 
                              
 
		  
                              
 
                                    		  
			 
                               Enables cell packing and specifies the cell-packing parameters.
			 
                              
 
			 
                              •  The 
				  cellsargument represents the maximum number of cells to be packed into an MPLS packet. The range is from 2 to the MTU of the interface divided by 52. The default is MTU/52.
				

                                • 

                              •  The 
				  timerargument allows you to specify which timer to use. The default is timer 1. 
				

                                • 

                              •  See the cell-packing command page for more information. 
				

                                • 

                              
 
		   
      
                              

                              Step 8 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                               

                              Example:
                               
			 
                              Router(config-if)# xconnect 10.0.0.1 123 encapsulation mpls
                              
 
		  
                              
 
                                    		  
			 
                               Binds the attachment circuit to the interface. 
			 
                              
 
		   
      
                              

                              Step 9 
			  
				exit 
			  
		  
                               

                              Example:
                               
			 
                              Router(config-if)# exit
                              
 
		  
                              
 
                                    		  
			 
                               Exits interface configuration mode. 
			 
                              
 
		   
      
                              

                              Step 10 
			  
				exit 
			  
		  
                               

                              Example:
                               
			 
                              Router(config)# exit
                              
 
		  
                              
 
                                    		  
			 
                               Exits global configuration mode.
			 
                              
 
		   
      
                              

                              Step 11 
			  
				show 
				atm 
				cell-packing 
			  
		  
                               

                              Example:
                               
			 
                              Router# show atm cell-packing
                              
 
		  
                              
 
                                    		  
			 
                               Displays cell-packing statistics.
			 
                              
 
		   
      
                              

                              Step 12 
			  
				show 
				atm 
				vp 
			  
		  
                               

                              Example:
                               
			 
                              Router# show atm vp
                              
 
		  
                              
 
                                    		  
			 
                               Displays cell-packing information. 
			 
                              
 
		   
      
                              

                              

                              Examples
                              
		
		
                               The 
		  show 
			 atm 
			 cell-packing command in the following example displays the following statistics:
		
                              

		
                              •  The number of cells that are to be packed into an MPLS packet on the local and peer routers
		  

                                • 

                              •  The average number of cells sent and received
		  

                                • 

                              •  The timer values associated with the local router 
		  

                                • 

                              
 
		
                              Router# show atm cell-packing
                         average                 average 
        circuit  local  nbr of cells    peer    nbr of cells    MCPT
        type     MNCP   rcvd in one pkt MNCP    sent in one pkt (us)
==============================================================================
atm 1/0 vc 1/200  20    15              30              20       60      
atm 1/0 vp 2      25    21              30              24      100

                              
 
		
                               The 
		  show 
			 atm 
			 vp command in the following example displays the cell packing information at the end of the output:
		
                              
 
		
                              Router# show atm vp 12
ATM5/0  VPI: 12, Cell Relay, PeakRate: 149760, CesRate: 0, DataVCs: 1, CesVCs: 0, Status: ACTIVE
  VCD    VCI   Type   InPkts   OutPkts   AAL/Encap     Status
  6      3     PVC    0        0         F4 OAM        ACTIVE  
  7      4     PVC    0        0         F4 OAM        ACTIVE  
TotalInPkts: 0, TotalOutPkts: 0, TotalInFast: 0, TotalOutFast: 0,
TotalBroadcasts: 0 TotalInPktDrops: 0, TotalOutPktDrops: 0
Local MNCP: 5, average number of cells received: 3
Peer MNCP: 1, average number of cells sent: 1
Local MCPT: 100 us
                              

	 
                              

                              

                              

                              Troubleshooting Tips
                              

                              
To debug ATM cell packing, issue the debug atm cell-packing command.
                              

                              

                              

                              

                              Configuring Ethernet over MPLS in VLAN Mode
                              

                              
      
                              
A VLAN is a switched network that is logically segmented by functions, project teams, or applications regardless of the physical location of users. Ethernet over MPLS allows you to connect two VLAN networks that are in different locations. You configure the PE routers at each end of the MPLS backbone and add a point-to-point VC. Only the two PE routers at the ingress and egress points of the MPLS backbone know about the VCs dedicated to transporting Layer 2 VLAN traffic. All other routers do not have table entries for those VCs. Ethernet over MPLS in VLAN mode transports Ethernet traffic from a source 802.1Q VLAN to a destination 802.1Q VLAN over a core MPLS network.
                              

      

                              Note
                              
You must configure Ethernet over MPLS (VLAN mode) on the subinterfaces.
                              

                              

    
                              
SUMMARY STEPS
                                1.   
      
          
            enable
          
        
                                

                                2.   
      
          
            configure
          
          
            terminal
          
        
                                

                                3.   
      
          
            interface
          
          
            gigabitethernet
          
          
            slot
          /interface.subinterface
                                

                                4.   
      
          
            encapsulation
            dot1q
          
          
            vlan-id
          
        
                                

                                5.   
      
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                

                                6.   
      
          
            end
          
        
                                


                              DETAILED STEPS
                                 Command or ActionPurpose
                                Step 1
          
            enable
          
        
                                 

                                Example:
                                
          
                                Router> enable
                                

        
                                
 
                                      		 
          
                                
Enables privileged EXEC mode. 
                                

          
                                • 
Enter your password if prompted.

                                  • 

                                

         
      
                                

                                Step 2
          
            configure
          
          
            terminal
          
        
                                 

                                Example:
                                
          
                                Router# configure terminal
                                

        
                                
 
                                      		 
          
                                
Enters global configuration mode.
                                

         
      
                                

                                Step 3
          
            interface
          
          
            gigabitethernet
          
          
            slot
          /interface.subinterface
                                 

                                Example:
                                
          
                                Router(config)# interface gigabitethernet4/0.1
                                

        
                                
 
                                      		 
          
                                
Specifies the Gigabit Ethernet subinterface and enters subinterface configuration mode. 
                                

          
                                • 
Make sure the subinterface on the adjoining CE router is on the same VLAN as this PE router. 

                                  • 

                                

         
      
                                

                                Step 4
          
            encapsulation
            dot1q
          
          
            vlan-id
          
        
                                 

                                Example:
                                
          
                                Router(config-subif)# encapsulation dot1q 100
                                

        
                                
 
                                      		 
          
                                
Enables the subinterface to accept 802.1Q VLAN packets.   
                                

          
                                • 
The subinterfaces between the CE and PE routers that are running Ethernet over MPLS must be in the same subnet. All other subinterfaces and backbone routers do not. 

                                  • 

                                

         
      
                                

                                Step 5
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                 

                                Example:
                                
          
                                Router(config-subif)# xconnect 10.0.0.1 123 encapsulation mpls
                                

        
                                
 
                                      		 
          
                                
Binds the attachment circuit to a pseudowire VC. 
                                

          
                                • 
The syntax for this command is the same as for all other Layer 2 transports. 

                                  • 

                                

         
      
                                

                                Step 6
          
            end
          
        
                                 

                                Example:
                                
          
                                Router(config-if-atm-l2trans-pvc)# end
                                

        
                                
 
                                      		 
          
                                
Exits L2transport PVC configuration mode and returns to privileged EXEC mode.
                                

         
      
                                

                                

                                

                                

                                Configuring Ethernet over MPLS in Port Mode
                                

                                 
		
                                 Port mode allows a frame coming into an interface to be packed into an MPLS packet and transported over the MPLS backbone to an egress interface. The entire Ethernet frame without the preamble or FCS is transported as a single packet. To configure port mode, use the 
		  xconnect command in interface configuration mode and specify the destination address and the VC ID. The syntax of the 
		  xconnect command is the same as for all other transport types. Each interface is associated with one unique pseudowire VC label.
		
                                
 
		
                                 When configuring Ethernet over MPLS in port mode, use the following guidelines:
		
                                
 
		
                                •  The pseudowire VC type is set to Ethernet. 
		  

                                  • 

                                •  Port mode and Ethernet VLAN mode are mutually exclusive. If you enable a main interface for port-to-port transport, you cannot also enter commands on a subinterface.
		  

                                  • 

                                •  In Cisco IOS Release 12.2(33)SRE and later releases, L2VPN Routed Interworking using Ethernet over MPLS (EOMPLS) is no longer supported. When you configure the 
			 interworking 
				ip command in pseudowire configuration mode, the 
			 xconnect command is disabled. To configure L2VPN Routed Interworking, use either Ethernet over MPLS (EOMPLS) or SVI (Switched Virtual Interface) based EOMPLS.
		  

                                  • 

                                
 
	 
                                
SUMMARY STEPS
                                  1.   
       
			  
				enable 
			  
		  
                                  

                                  2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                  

                                  3.   
       
			  
				interface 
			  
			  
				gigabitethernet 
			  
			  
				slot/interface 
			  
		  
                                  

                                  4.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                  

                                  5.   
       
			  
				exit 
			  
		  
                                  

                                  6.   
       
			  
				exit 
			  
		  
                                  

                                  7.   
       
			  
				show 
				mpls 
				l2transport 
				vc 
			  
		  
                                  


                                DETAILED STEPS
                                   Command or ActionPurpose
                                  Step 1 
			  
				enable 
			  
		  
                                   

                                  Example:
                                   
			 
                                  Router> enable
                                  
 
		  
                                  
 
                                        		  
			 
                                   Enables privileged EXEC mode. 
			 
                                  
 
			 
                                  •  Enter your password if prompted.
				

                                    • 

                                  
 
		   
      
                                  

                                  Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                   

                                  Example:
                                   
			 
                                  Router# configure terminal
                                  
 
		  
                                  
 
                                        		  
			 
                                   Enters global configuration mode.
			 
                                  
 
		   
      
                                  

                                  Step 3 
			  
				interface 
			  
			  
				gigabitethernet 
			  
			  
				slot/interface 
			  
		  
                                   

                                  Example:
                                   
			 
                                  Router(config)# interface gigabitethernet4/0
                                  
 
		  
                                  
 
                                        		  
			 
                                   Specifies the Gigabit Ethernet interface and enters interface configuration mode. 
			 
                                  
 
			 
                                  •  Make sure the interface on the adjoining CE router is on the same VLAN as this PE router.
				

                                    • 

                                  
 
		   
      
                                  

                                  Step 4 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                   

                                  Example:
                                   
			 
                                  Router(config-if)# xconnect 10.0.0.1 123 encapsulation mpls
                                  
 
		  
                                  
 
                                        		  
			 
                                   Binds the attachment circuit to a pseudowire VC. 
			 
                                  
 
			 
                                  •  The syntax for this command is the same as for all other Layer 2 transports. 
				

                                    • 

                                  
 
		   
      
                                  

                                  Step 5 
			  
				exit 
			  
		  
                                   

                                  Example:
                                   
			 
                                  Router(config-if)# exit
                                  
 
		  
                                  
 
                                        		  
			 
                                   Exits interface configuration mode.
			 
                                  
 
		   
      
                                  

                                  Step 6 
			  
				exit 
			  
		  
                                   

                                  Example:
                                   
			 
                                  Router(config)# exit
                                  
 
		  
                                  
 
                                        		  
			 
                                   Exits router configuration mode.
			 
                                  
 
		   
      
                                  

                                  Step 7 
			  
				show 
				mpls 
				l2transport 
				vc 
			  
		  
                                   

                                  Example:
                                   
			 
                                  Router# show mpls l2transport vc
                                  
 
		  
                                  
 
                                        		  
			 
                                   Displays information about Ethernet over MPLS port mode. 
			 
                                  
 
		   
      
                                  

                                  

                                  Examples
                                  
		
		
                                   In the following example, the output of the 
		  show 
			 mpls 
			 l2transport 
			 vc 
			 detailcommand is displayed: 
		
                                  

		
                                  Router# show mpls l2transport vc detail
Local interface: Gi4/0.1 up, line protocol up, Eth VLAN 2 up
Destination address: 10.1.1.1, VC ID: 2, VC status: up
.
.
.
Local interface: Gi8/0/1 up, line protocol up, Ethernet up
  Destination address: 10.1.1.1, VC ID: 8, VC status: up
                                  

	 
                                  

                                  

                                  

                                  Configuring Ethernet over MPLS with VLAN ID Rewrite
                                  

                                  
The VLAN ID rewrite feature enables you to use VLAN interfaces with different VLAN IDs at both ends of the tunnel.
                                  

                                  
The Cisco 12000 series router requires you to configure VLAN ID rewrite manually, as described in the following sections.
                                  

                                  
The following routers automatically perform VLAN ID rewrite on the disposition PE router. No configuration is required:
                                  

                                  • 
Cisco 7200 series routers.

                                    • 

                                  • 
Cisco 7500 series routers.

                                    • 

                                  • 
Cisco 10720 series routers.

                                    • 

                                  • 
Routers supported on Cisco IOS Release 12.4(11)T. (Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS software image support.)

                                    • 

                                  

                                  
The following sections explain how to configure the VLAN ID rewrite feature:
                                  

                                  

                                  

                                  Configuring Ethernet over MPLS with VLAN ID Rewrite for Cisco 12k    Routers for 12.0(29)S and Earlier Releases
                                  

                                   Use the following guidelines for the VLAN ID rewrite feature for the
		Cisco 12000 series routers in Cisco IOS releases earlier than 12.0(29)S:
	 
                                  

                                  •  The IP Service Engine (ISE)
		  4-port Gigabit Ethernet line card performs the VLAN ID rewrite on the
		  disposition side at the edge-facing line card. 
		

                                    • 

                                  •  The engine 2 3-port Gigabit
		  Ethernet line card performs the VLAN ID rewrite on the imposition side at the
		  edge-facing line card. 
		

                                    • 

                                  

                                   The VLAN ID rewrite functionality requires that both ends of the
		Ethernet over MPLS connections be provisioned with the same line cards. Make
		sure that both edge-facing ends of the virtual circuit use either the engine 2
		or ISE Ethernet line card. The following example shows the system flow with the
		VLAN ID rewrite feature: 
	 
                                  

                                  •  The ISE 4-port Gigabit
		  Ethernet line card:
		

                                    • 

                                  

                                   Traffic flows from VLAN1 on CE1 to VLAN2 on CE2. As the frame reaches
		the edge-facing line card of the disposition router PE2, the VLAN ID in the
		dot1Q header changes to the VLAN ID assigned to VLAN2. 
	 
                                  

                                  •  The engine 2 3-port Gigabit
		  Ethernet line card:
		

                                    • 

                                  

                                   Traffic flows from VLAN1 on CE1 to VLAN2 on CE2. As the frame reaches
		the edge-facing line card of the imposition router PE1, the VLAN ID in the
		dot1Q header changes to the VLAN ID assigned to VLAN2. 
	 
                                  

                                   For the Cisco 12000 series router engine 2 3-port Gigabit Ethernet line
		card, you must issue the remote circuit id command as part of the Ethernet over MPLS VLAN ID
		rewrite configuration.
	 
                                  

                                  

                                  

                                  Configuring Ethernet over MPLS with VLAN ID Rewrite for Cisco 12k Routers for 12.0(30)S and Later Releases
                                  

                                   
		
                                   In Cisco IOS Release 12.0(30)S, the following changes to VLAN ID rewrite were implemented: 
		
                                  
 
		
                                  •  The ISE 4-port Gigabit Ethernet line card can perform VLAN ID rewrite at both the imposition and disposition sides of the edge-facing router. 
		  

                                    • 

                                  •  The 
			 remote 
				circuit 
				id command is not required as part of the Ethernet over MPLS VLAN ID rewrite configuration, as long as both PE routers are running Cisco IOS Release 12.0(30)S. The VLAN ID rewrite feature is implemented automatically when you configure Ethernet over MPLS. 
		  

                                    • 

                                  •  The VLAN ID rewrite feature in Cisco IOS Release 12.0(30)S can interoperate with routers that are running earlier releases. If you have a PE router at one end of the circuit that is using an earlier Cisco IOS release and the 
				remote 
				circuit 
				idcommand, the other PE can run Cisco IOS Release 12.0(30)S and still perform VLAN ID rewrite. 
		  

                                    • 

                                  •  You can mix the line cards on the PE routers, as shown in the following table 
		  

                                    • 

                                  
 
		

                                  Table 6 Supported Line Cards for VLAN ID Rewrite Feature:
                                   
				  
                                   If PE1 Has These Line Cards 
				  
                                  
 
				                                  		
 
				  
                                   Then PE2 Can Use These Line Cards 
				  
                                  
 
				                                  		

                                  
                                  

                                   
				  
                                   Engine 2 3-port Gigabit Ethernet line card or ISE 4-port Gigabit Ethernet line card 
				  
                                  
 
				                                  		
 
				  
                                   Engine 2 3-port Gigabit Ethernet line card or ISE 4-port Gigabit Ethernet line card 
				  
                                  
 
				                                  		

                                  

                                   
				  
                                   ISE 4-port Gigabit Ethernet line card 
				  
                                  
 
				                                  		
 
				  
                                   Any Cisco 12000 series router line card 
				  
                                  
 
				                                  		

                                  
                                  

                                  

                                  
 
	 
                                  
SUMMARY STEPS
                                    1.   
       
			  
				enable 
			  
		  
                                    

                                    2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                    

                                    3.   
       
			  
				interface 
			  
			  
				gigabitethernet 
			  
			  
				slot 
			 /interface.subinterface
		  
                                    

                                    4.   
       
			  
				encapsulation 
				dot1q 
			  
			  
				vlan-id 
			  
		  
                                    

                                    5.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                    

                                    6.   
       
			  
				remote 
				circuit 
				id 
			  
			  
				remote-vlan-id 
			  
		  
                                    

                                    7.   
       
			  
				exit 
			  
		  
                                    

                                    8.   
       
			  
				exit 
			  
		  
                                    

                                    9.   
       
			  
				exit 
			  
		  
                                    

                                    10.   
       
			  
				show 
				controllers 
				eompls 
				forwarding-table 
			  
		  
                                    


                                  DETAILED STEPS
                                     Command or ActionPurpose
                                    Step 1 
			  
				enable 
			  
		  
                                     

                                    Example:
                                     
			 
                                    Router> enable
                                    
 
		  
                                    
 
                                          		  
			 
                                     Enables privileged EXEC mode. 
			 
                                    
 
			 
                                    •  Enter your password if prompted. 
				

                                      • 

                                    
 
		   
      
                                    

                                    Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                     

                                    Example:
                                     
			 
                                    Router# configure terminal
                                    
 
		  
                                    
 
                                          		  
			 
                                     Enters global configuration mode. 
			 
                                    
 
		   
      
                                    

                                    Step 3 
			  
				interface 
			  
			  
				gigabitethernet 
			  
			  
				slot 
			 /interface.subinterface
		  
                                     

                                    Example:
                                     
			 
                                    Router(config)# interface gigabitethernet4/0.1
                                    
 
		  
                                    
 
                                          		  
			 
                                     Specifies the Gigabit Ethernet subinterface and enters subinterface configuration mode. 
			 
                                    
 
			 
                                    •  Make sure the subinterfaces between the CE and PE routers that are running Ethernet over MPLS are in the same subnet. All other subinterfaces and backbone routers do not need to be in the same subnet. 
				

                                      • 

                                    
 
		   
      
                                    

                                    Step 4 
			  
				encapsulation 
				dot1q 
			  
			  
				vlan-id 
			  
		  
                                     

                                    Example:
                                     
			 
                                    Router(config-subif)# encapsulation dot1q 100
                                    
 
		  
                                    
 
                                          		  
			 
                                     Enables the subinterface to accept 802.1Q VLAN packets. 
			 
                                    
 
			 
                                    •  Make sure the subinterface on the adjoining CE router is on the same VLAN as this PE router. 
				

                                      • 

                                    
 
		   
      
                                    

                                    Step 5 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                     

                                    Example:
                                     
			 
                                    Router(config-subif)# xconnect 10.0.0.1 123 encapsulation mpls
                                    
 
		  
                                    
 
                                          		  
			 
                                     Binds the attachment circuit to a pseudowire VC and enters xconnect configuration mode. 
			 
                                    
 
			 
                                    •  The syntax for this command is the same as for all other Layer 2 transports. 
				

                                      • 

                                    
 
		   
      
                                    

                                    Step 6 
			  
				remote 
				circuit 
				id 
			  
			  
				remote-vlan-id 
			  
		  
                                     

                                    Example:
                                     
			 
                                    Router(config-subif-xconn)# remote circuit id 101
                                    
 
		  
                                    
 
                                          		  
			 
                                     Enables you to use VLAN interfaces with different VLAN IDs at both ends of the tunnel. 
			 
                                    
 
			 
                                    •  This command is required only for the Cisco 12000 series router engine 2 3-port Gigabit Ethernet line card. 
				

                                      • 

                                    
 
		   
      
                                    

                                    Step 7 
			  
				exit 
			  
		  
                                     

                                    Example:
                                     
			 
                                    Router(config-subif-xconn)# exit
                                    
 
		  
                                    
 
                                          		  
			 
                                     Exits xconnect configuration mode. 
			 
                                    
 
		   
      
                                    

                                    Step 8 
			  
				exit 
			  
		  
                                     

                                    Example:
                                     
			 
                                    Router(config-subif)# exit
                                    
 
		  
                                    
 
                                          		  
			 
                                     Exits subinterface configuration mode. 
			 
                                    
 
		   
      
                                    

                                    Step 9 
			  
				exit 
			  
		  
                                     

                                    Example:
                                     
			 
                                    Router(config)# exit
                                    
 
		  
                                    
 
                                          		  
			 
                                     Exits global configuration mode. 
			 
                                    
 
		   
      
                                    

                                    Step 10 
			  
				show 
				controllers 
				eompls 
				forwarding-table 
			  
		  
                                     

                                    Example:
                                     
			 
                                    Router# execute slot 0 show controllers eompls forwarding-table
                                    
 
		  
                                    
 
                                          		  
			 
                                     Displays information about VLAN ID rewrite. 
			 
                                    
 
		   
      
                                    

                                    

                                    Examples
                                    
		
		
                                     The command output of the 
		  show 
			 controllers 
			 eompls 
			 forwarding-tablecommand in the following example shows VLAN ID rewrite configured on the Cisco 12000 series routers with an engine 2 3-port Gigabit Ethernet line card. In the following example, the bolded command output show the VLAN ID rewrite information.
		
                                    

		
		
                                    Router# execute slot 0 show controllers eompls forwarding-table 0 2
Port # 0, VLAN-ID # 2, Table-index 2
EoMPLS configured: 1
tag_rew_ptr             = D001BB58
Leaf entry?     = 1
FCR index       = 20
           **tagrew_psa_addr    = 0006ED60
           **tagrew_vir_addr    = 7006ED60
           **tagrew_phy_addr    = F006ED60
        [0-7] loq 8800 mtu 4458  oq 4000 ai 3 oi 04019110 (encaps size 4)
        cw-size 4 vlanid-rew 3
        gather A30 (bufhdr size 32 EoMPLS (Control Word) Imposition profile 81)
        2 tag: 18 18
        counters 1182, 10 reported 1182, 10.
    Local OutputQ (Unicast):    Slot:2  Port:0  RED queue:0  COS queue:0
    Output Q (Unicast):         Port:0          RED queue:0  COS queue:0
                                    

		
		
                                    Router# execute slot 0 show controllers eompls forwarding-table 0 3
 
Port # 0, VLAN-ID # 3, Table-index 3
EoMPLS configured: 1
tag_rew_ptr             = D0027B90
Leaf entry?     = 1
FCR index       = 20
           **tagrew_psa_addr    = 0009EE40
           **tagrew_vir_addr    = 7009EE40
           **tagrew_phy_addr    = F009EE40
        [0-7] loq 9400 mtu 4458  oq 4000 ai 8 oi 84000002 (encaps size 4)
        cw-size 4 vlanid-rew 2
        gather A30 (bufhdr size 32 EoMPLS (Control Word) Imposition profile 81)
        2 tag: 17 18
        counters 1182, 10 reported 1182, 10.
    Local OutputQ (Unicast):    Slot:5  Port:0  RED queue:0  COS queue:0
    Output Q (Unicast):         Port:0          RED queue:0  COS queue:0
                                    

	 
                                    

                                    

                                    

                                    Configuring per-Subinterface MTU for Ethernet over MPLS
                                    

                                    SUMMARY STEPS
                                      1.   
      
          
            enable
          
        
                                      

                                      2.   
      
          
            configure
          
          
            terminal
          
        
                                      

                                      3.   
      
          
            interface
            gigabitethernet
          
          
            slot
          
          
            /
          
          
            subslot
          
          
            /
          
          
            port
          [. subinterface]
                                      

                                      4.   
      
          
            mtu
          
          
            mtu-value
          
        
                                      

                                      5.   
      
          
            interface
            gigabitethernet
          
          
            slot
          
          
            /
          
          
            subslot
          
          
            /
          
          
            port
          [. subinterface]
                                      

                                      6.   
      
          
            encapsulation
            dot1q
          
          
            vlan-id
          
        
                                      

                                      7.   
      
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                      

                                      8.   
      
          
            mtu
          
          
            mtu-value
          
        
                                      

                                      9.   
      
          
            end
          
        
                                      

                                      10.   
      
          
            show
            mpls
            l2transport
            binding
          
        
                                      


                                    DETAILED STEPS
                                       Command or ActionPurpose
                                      Step 1
          
            enable
          
        
                                       

                                      Example:
                                      
          
                                      Router> enable
                                      

        
                                      
 
                                            		 
          
                                      
Enables privileged EXEC mode. 
                                      

          
                                      • 
Enter your password if prompted.

                                        • 

                                      

         
      
                                      

                                      Step 2
          
            configure
          
          
            terminal
          
        
                                       

                                      Example:
                                      
          
                                      Router# configure terminal
                                      

        
                                      
 
                                            		 
          
                                      
Enters global configuration mode.
                                      

         
      
                                      

                                      Step 3
          
            interface
            gigabitethernet
          
          
            slot
          
          
            /
          
          
            subslot
          
          
            /
          
          
            port
          [. subinterface]
                                       

                                      Example:
                                      
          
                                      Router(config)# interface gigabitethernet4/0/0
                                      

        
                                      
 
                                            		 
          
                                      
Specifies the Gigabit Ethernet interface and enters interface configuration mode. 
                                      

         
      
                                      

                                      Step 4
          
            mtu
          
          
            mtu-value
          
        
                                       

                                      Example:
                                      
          
                                      Router(config-if)# mtu 2000
                                      

        
                                      
 
                                            		 
          
                                      
Specifies the MTU value for the interface. The MTU value specified at the interface level can be inherited by a subinterface.
                                      

         
      
                                      

                                      Step 5
          
            interface
            gigabitethernet
          
          
            slot
          
          
            /
          
          
            subslot
          
          
            /
          
          
            port
          [. subinterface]
                                       

                                      Example:
                                      
          
                                      Router(config-if)# interface gigabitethernet4/0/0.1
                                      

        
                                      
 
                                            		 
          
                                      
Specifies the Gigabit Ethernet subinterface and enters subinterface configuration mode.
                                      

          
                                      
Make sure the subinterface on the adjoining CE router is on the same VLAN as this PE router. 
                                      

         
      
                                      

                                      Step 6
          
            encapsulation
            dot1q
          
          
            vlan-id
          
        
                                       

                                      Example:
                                      
          
                                      Router(config-subif)# encapsulation dot1q 100
                                      

        
                                      
 
                                            		 
          
                                      
Enables the subinterface to accept 802.1Q VLAN packets.   
                                      

          
                                      
The subinterfaces between the CE and PE routers that are running Ethernet over MPLS must be in the same subnet. All other subinterfaces and backbone routers need not be. 
                                      

         
      
                                      

                                      Step 7
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                       

                                      Example:
                                      
          
                                      Router(config-subif)# xconnect 10.0.0.1 123 encapsulation mpls
                                      

        
                                      
 
                                            		 
          
                                      
Binds the attachment circuit to a pseudowire VC.
                                      

          
                                      
The syntax for this command is the same as for all other Layer 2 transports. Enters xconnect subinterface configuration mode.
                                      

         
      
                                      

                                      Step 8
          
            mtu
          
          
            mtu-value
          
        
                                       

                                      Example:
                                      
          
                                      Router(config-if-xconn)# mtu 1400
                                      

        
                                      
 
                                            		 
          
                                      
Specifies the MTU for the VC. 
                                      

         
      
                                      

                                      Step 9
          
            end
          
        
                                       

                                      Example:
                                      
          
                                      Router(config-if-xconn)# end
                                      

        
                                      
 
                                            		 
          
                                      
Exits to privileged EXEC mode. 
                                      

         
      
                                      

                                      Step 10
          
            show
            mpls
            l2transport
            binding
          
        
                                       

                                      Example:
                                      
          
                                      Router# show mpls l2transport binding
                                      

        
                                      
 
                                            		 
          
                                      
Displays the MTU values assigned to the local and remote interfaces. 
                                      

         
      
                                      

                                      

                                      

                                      

                                      Configuring Frame Relay over MPLS with DLCI-to-DLCI Connections
                                      

                                       
		
                                       Frame Relay over MPLS encapsulates Frame Relay PDUs in MPLS packets and forwards them across the MPLS network. For Frame Relay, you can set up data-link connection identifier (DLCI)-to-DLCI connections or port-to-port connections. With DLCI-to-DLCI connections, the PE routers manipulate the packet by removing headers, adding labels, and copying control word elements from the header to the PDU. 
		
                                      
 
		
                                       Perform this task to configure Frame Relay over MPLS with DLCI-to-DLCI connections. 
		
                                      
 
	 
                                      
SUMMARY STEPS
                                        1.   
       
			  
				enable 
			  
		  
                                        

                                        2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                        

                                        3.   
       
			  
				frame-relay 
				switching 
			  
		  
                                        

                                        4.   
       
			  
				interface 
			  
			  
				serial 
			  
			  
				slot 
			 /port
		  
                                        

                                        5.   
       
			  
				encapsulation 
				frame-relay 
			  [cisco | 
			 ietf]
		  
                                        

                                        6.   
       
			  
				frame-relay 
				intf-type 
				dce 
			  
		  
                                        

                                        7.   
       
			  
				exit 
			  
		  
                                        

                                        8.   
       
			  
				connect 
			  
			  
				connection-name 
				interface 
				dlci 
			  
			  
				l2transport 
			  
		  
                                        

                                        9.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                        

                                        10.   
       
			  
				end 
			  
		  
                                        


                                      DETAILED STEPS
                                         Command or ActionPurpose
                                        Step 1 
			  
				enable 
			  
		  
                                         

                                        Example:
                                         
			 
                                        Router> enable
                                        
 
		  
                                        
 
                                              		  
			 
                                         Enables privileged EXEC mode. 
			 
                                        
 
			 
                                        •  Enter your password if prompted.
				

                                          • 

                                        
 
		   
      
                                        

                                        Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                         

                                        Example:
                                         
			 
                                        Router# configure terminal
                                        
 
		  
                                        
 
                                              		  
			 
                                         Enters global configuration mode.
			 
                                        
 
		   
      
                                        

                                        Step 3 
			  
				frame-relay 
				switching 
			  
		  
                                         

                                        Example:
                                         
			 
                                        Router(config)# frame-relay switching
                                        
 
		  
                                        
 
                                              		  
			 
                                         Enables PVC switching on a Frame Relay device.
			 
                                        
 
		   
      
                                        

                                        Step 4 
			  
				interface 
			  
			  
				serial 
			  
			  
				slot 
			 /port
		  
                                         

                                        Example:
                                         
			 
                                        Router(config)# interface serial3/1
                                        
 
		  
                                        
 
                                              		  
			 
                                         Specifies a serial interface and enters interface configuration mode. 
			 
                                        
 
		   
      
                                        

                                        Step 5 
			  
				encapsulation 
				frame-relay 
			  [cisco | 
			 ietf]
		  
                                         

                                        Example:
                                         
			 
                                        Router(config-if)# encapsulation frame-relay ietf 
                                        
 
		  
                                        
 
                                              		  
			 
                                         Specifies Frame Relay encapsulation for the interface. 
			 
                                        
 
			 
                                        •  You can specify different types of encapsulations. You can set one interface to Cisco encapsulation and the other interface to IETF encapsulation. 
				

                                          • 

                                        
 
		   
      
                                        

                                        Step 6 
			  
				frame-relay 
				intf-type 
				dce 
			  
		  
                                         

                                        Example:
                                         
			 
                                        Router(config-if)# frame-relay intf-type dce
                                        
 
		  
                                        
 
                                              		  
			 
                                         Specifies that the interface is a DCE switch. 
			 
                                        
 
			 
                                        •  You can also specify the interface to support Network-to-Network Interface (NNI) and DTE connections. 
				

                                          • 

                                        
 
		   
      
                                        

                                        Step 7 
			  
				exit 
			  
		  
                                         

                                        Example:
                                         
			 
                                        Router(config-if)# exit
                                        
 
		  
                                        
 
                                              		  
			 
                                         Exits from interface configuration mode. 
			 
                                        
 
		   
      
                                        

                                        Step 8 
			  
				connect 
			  
			  
				connection-name 
				interface 
				dlci 
			  
			  
				l2transport 
			  
		  
                                         

                                        Example:
                                         
			 
                                        Router(config)# connect fr1 serial5/0 1000 l2transport
                                        
 
		  
                                        
 
                                              		  
			 
                                         Defines connections between Frame Relay PVCs and enters connect configuration mode. 
			 
                                        
 
			 
                                        •  Using the 
				  l2transport keyword specifies that the PVC will not be a locally switched PVC, but will be tunneled over the backbone network.
				

                                          • 

                                        •  The 
					 connection-name argument is a text string that you provide. 
				

                                          • 

                                        •  The 
				  interface argument is the interface on which a PVC connection will be defined. 
				

                                          • 

                                        •  The 
				  dlciargument is the DLCI number of the PVC that will be connected.
				

                                          • 

                                        
 
		   
      
                                        

                                        Step 9 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                         

                                        Example:
                                         
			 
                                        Router(config-fr-pw-switching)# xconnect 10.0.0.1 123 encapsulation mpls
                                        
 
		  
                                        
 
                                              		  
			 
                                         Creates the VC to transport the Layer 2 packets. 
			 
                                        
 
			 
                                        •  In a DLCI-to DLCI connection type, Frame Relay over MPLS uses the 
				  xconnect command in connect configuration mode. 
				

                                          • 

                                        
 
		   
      
                                        

                                        Step 10 
			  
				end 
			  
		  
                                         

                                        Example:
                                         
			 
                                        Router(config-fr-pw-switching)# end
                                        
 
		  
                                        
 
                                              		  
			 
                                         Exits connect configuration mode and returns to privileged EXEC mode.
			 
                                        
 
		   
      
                                        

                                        

                                        

                                        

                                        Configuring Frame Relay over MPLS with Port-to-Port Connections
                                        

                                         
		
                                         Frame Relay over MPLS encapsulates Frame Relay PDUs in MPLS packets and forwards them across the MPLS network. For Frame Relay, you can set up DLCI-to-DLCI connections or port-to-port connections. With port-to-port connections, you use HDLC mode to transport the Frame Relay encapsulated packets. In HDLC mode, the whole HDLC packet is transported. Only the HDLC flags and FCS bits are removed. The contents of the packet are not used or changed, including the backward explicit congestion notification (BECN), forward explicit congestion notification (FECN) and discard eligibility (DE) bits. 
		
                                        
 
		
                                         Perform this task to set up Frame Relay port-to-port connections.
		
                                        
 
	 
                                        
SUMMARY STEPS
                                          1.   
       
			  
				enable 
			  
		  
                                          

                                          2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                          

                                          3.   
       
			  
				interface 
			  
			  
				serial 
			  
			  
				slot 
			 /port
		  
                                          

                                          4.   
       
			  
				encapsulation 
				hdlc 
			  
			  
				 
				 
			  
		  
                                          

                                          5.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                          

                                          6.   
       
			  
				end 
			  
		  
                                          


                                        DETAILED STEPS
                                           Command or ActionPurpose
                                          Step 1 
			  
				enable 
			  
		  
                                           

                                          Example:
                                           
			 
                                          Router> enable
                                          
 
		  
                                          
 
                                                		  
			 
                                           Enables privileged EXEC mode. 
			 
                                          
 
			 
                                          •  Enter your password if prompted.
				

                                            • 

                                          
 
		   
      
                                          

                                          Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                           

                                          Example:
                                           
			 
                                          Router# configure terminal
                                          
 
		  
                                          
 
                                                		  
			 
                                           Enters global configuration mode.
			 
                                          
 
		   
      
                                          

                                          Step 3 
			  
				interface 
			  
			  
				serial 
			  
			  
				slot 
			 /port
		  
                                           

                                          Example:
                                           
			 
                                          Router(config)# interface serial5/0
                                          
 
		  
                                          
 
                                                		  
			 
                                           Specifies a serial interface and enters interface configuration mode.
			 
                                          
 
		   
      
                                          

                                          Step 4 
			  
				encapsulation 
				hdlc 
			  
			  
				 
				 
			  
		  
                                           

                                          Example:
                                           
			 
                                          Router(config-if)# encapsulation hdlc 
                                          
 
		  
                                          
 
                                                		  
			 
                                           Specifies that Frame Relay PDUs will be encapsulated in HDLC packets. 
			 
                                          
 
		   
      
                                          

                                          Step 5 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                           

                                          Example:
                                           
			 
                                          Router(config-if)# xconnect 10.0.0.1 123 encapsulation mpls
                                          
 
		  
                                          
 
                                                		  
			 
                                           Creates the VC to transport the Layer 2 packets. 
			 
                                          
 
			 
                                           
			 
                                          
 
		   
      
                                          

                                          Step 6 
			  
				end 
			  
		  
                                           

                                          Example:
                                           
			 
                                          Router(config-if)# end
                                          
 
		  
                                          
 
                                                		  
			 
                                           Exits interface configuration mode and enters privileged EXEC mode.
			 
                                          
 
		   
      
                                          

                                          

                                          

                                          

                                          Configuring HDLC and PPP over MPLS
                                          

                                          
      
                                          
With HDLC over MPLS, the whole HDLC packet is transported. The ingress PE router removes only the HDLC flags and FCS bits. The contents of the packet are not used or changed.
                                          

      
                                          
With PPP over MPLS, the ingress PE router removes the flags, address, control field, and the FCS. 
                                          

      

                                          Note
                                          
        
                                          
The following restrictions pertain to the HDLC over MPLS feature:
                                          

        
                                          • 
Asynchronous interfaces are not supported. 

                                            • 

                                          • 
You must configure HDLC over MPLS on router interfaces only. You cannot configure HDLC over MPLS on subinterfaces. 

                                            • 

                                          

        
                                          
The following restrictions pertain to the PPP over MPLS feature:
                                          

        
                                          • 
Zero hops on one router is not supported. However, you can have back-to-back PE routers. 

                                            • 

                                          • 
Asynchronous interfaces are not supported. The connections between the CE and PE routers on both ends of the backbone must have similar link layer characteristics. The connections between the CE and PE routers must both be synchronous. 

                                            • 

                                          • 
Multilink PPP (MLP) is not supported.

                                            • 

                                          • 
You must configure PPP on router interfaces only. You cannot configure PPP on subinterfaces. 

                                            • 

                                          

>
                                          

    
                                          
SUMMARY STEPS
                                            1.   
      
          
            enable
          
        
                                            

                                            2.   
      
          
            configure
          
          
            terminal
          
        
                                            

                                            3.   
      
          
            interface
          
          
            serial
          
          
            slot
          /port
                                            

                                            4.   
      Do one of the following:
                                            • 
            
              encapsulation
            
            
              
              
            
            
              ppp
            
          
                                              • 

                                            • 
          
                                              • 

                                            • 
            
              encapsulation
              hdlc
            
          
                                              • 

                                            

                                            

                                            5.   
      
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                            

                                            6.   
      
          
            end
          
        
                                            


                                          DETAILED STEPS
                                             Command or ActionPurpose
                                            Step 1
          
            enable
          
        
                                             

                                            Example:
                                            
          
                                            Router> enable
                                            

        
                                            
 
                                                  		 
          
                                            
Enables privileged EXEC mode. 
                                            

          
                                            • 
Enter your password if prompted.

                                              • 

                                            

         
      
                                            

                                            Step 2
          
            configure
          
          
            terminal
          
        
                                             

                                            Example:
                                            
          
                                            Router# configure terminal
                                            

        
                                            
 
                                                  		 
          
                                            
Enters global configuration mode.
                                            

         
      
                                            

                                            Step 3
          
            interface
          
          
            serial
          
          
            slot
          /port
                                             

                                            Example:
                                            
          
                                            Router(config)# interface serial5/0
                                            

        
                                            
 
                                                  		 
          
                                            
Specifies a serial interface and enters interface configuration mode. 
                                            

          
                                            • 
You must configure HDLC and PPP over MPLS on router interfaces only. You cannot configure HDLC over MPLS on subinterfaces. 

                                              • 

                                            

         
      
                                            

                                            Step 4Do one of the following:
                                            • 
            
              encapsulation
            
            
              
              
            
            
              ppp
            
          
                                              • 

                                            • 
          
                                              • 

                                            • 
            
              encapsulation
              hdlc
            
          
                                              • 

                                            
 

                                            Example:
                                            
          
                                            Router(config-if)# encapsulation ppp 
                                            

        
                                            
 

                                            Example:
                                            
          
                                            or 
                                            

        
                                            
 

                                            Example:
                                            
          
                                                        

          
                                            

        
                                            
 

                                            Example:
                                            
          
                                            Router(config-if)# encapsulation hdlc 
                                            

        
                                            
 
                                                  		 
          
                                            
Specifies HDLC or PPP encapsulation and enters connect configuration mode.
                                            

         
      
                                            

                                            Step 5
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                             

                                            Example:
                                            
          
                                            Router(config-fr-pw-switching)# xconnect 10.0.0.1 123 encapsulation mpls
                                            

        
                                            
 
                                                  		 
          
                                            
Creates the VC to transport the Layer 2 packets. 
                                            

          
                                            
          
                                            

         
      
                                            

                                            Step 6
          
            end
          
        
                                             
                                                  		 
          
                                            
Exits connect configuration mode and returns to privileged EXEC mode.
                                            

         
      
                                            

                                            

                                            

                                            

                                            Configuring Tunnel Selection
                                            

                                             
		
                                             The tunnel selection feature allows you to specify the path that traffic uses. You can specify either an MPLS TE tunnel or destination IP address or domain name server (DNS) name. 
		
                                            
 
		
                                             You also have the option of specifying whether the VCs should use the default path (the path LDP uses for signaling) if the preferred path is unreachable. This option is enabled by default; you must explicitly disable it.
		
                                            
 
		
                                             You configure tunnel selection when you set up the pseudowire class. You enable tunnel selection with the 
		  preferred-path command. Then, you apply the pseudowire class to an interface that has been configured to transport AToM packets. 
		
                                            
 
		
                                             The following guidelines provide more information about configuring tunnel selection:
		
                                            
 
		
                                            •  The 
			 preferred-path command is available only if the pseudowire encapsulation type is MPLS. 
		  

                                              • 

                                            •  This tunnel selection feature is enabled when you exit from pseudowire mode.
		  

                                              • 

                                            •  The selected path should be an LSP destined to the peer PE router. 
		  

                                              • 

                                            •  The selected tunnel must be an MPLS TE tunnel.
		  

                                              • 

                                            •  If you select a tunnel, the tunnel tailend must be on the remote PE router. 
		  

                                              • 

                                            •  If you specify an IP address, that address must be the IP address of the loopback interface on the remote PE router. The address must have a /32 mask. There must be an LSP destined to that selected address. The LSP need not be a TE tunnel. 
		  

                                              • 

                                            
 
	 
                                            
SUMMARY STEPS
                                              1.   
       
			  
				enable 
			  
		  
                                              

                                              2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                              

                                              3.   
       
			  
				pseudowire-class 
			  
			  
				name 
			  
		  
                                              

                                              4.   
       
			  
				encapsulation 
				mpls 
			  
		  
                                              

                                              5.   
       
			  
				preferred-path 
			  {interface 
				tunnel 
			 tunnel-number | 
			 peer {ip-address | 
			 host-name}} [disable-fallback]
		  
                                              

                                              6.   
       
			  
				exit 
			  
		  
                                              

                                              7.   
       
			  
				interface 
			  
			  
				slot 
			 /port
		  
                                              

                                              8.   
       
			  
				encapsulation 
			  
			  
				encapsulation-type 
			  
		  
                                              

                                              9.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				pw-class 
				name 
			  
		  
                                              

                                              10.   
       
			  
				end 
			  
		  
                                              


                                            DETAILED STEPS
                                               Command or ActionPurpose
                                              Step 1 
			  
				enable 
			  
		  
                                               

                                              Example:
                                               
			 
                                              Router> enable
                                              
 
		  
                                              
 
                                                    		  
			 
                                               Enables privileged EXEC mode. 
			 
                                              
 
			 
                                              •  Enter your password if prompted.
				

                                                • 

                                              
 
		   
      
                                              

                                              Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                               

                                              Example:
                                               
			 
                                              Router# configure terminal
                                              
 
		  
                                              
 
                                                    		  
			 
                                               Enters global configuration mode.
			 
                                              
 
		   
      
                                              

                                              Step 3 
			  
				pseudowire-class 
			  
			  
				name 
			  
		  
                                               

                                              Example:
                                               
			 
                                              Router(config)# pseudowire-class ts1
                                              
 
		  
                                              
 
                                                    		  
			 
                                               Establishes a pseudowire class with a name that you specify and enters pseudowire configuration mode.
			 
                                              
 
		   
      
                                              

                                              Step 4 
			  
				encapsulation 
				mpls 
			  
		  
                                               

                                              Example:
                                               
			 
                                              Router(config-pw-class)# encapsulation mpls 
                                              
 
		  
                                              
 
                                                    		  
			 
                                               Specifies the tunneling encapsulation. 
			 
                                              
 
			 
                                              •  For AToM, the encapsulation type is 
				  mpls.
				

                                                • 

                                              
 
		   
      
                                              

                                              Step 5 
			  
				preferred-path 
			  {interface 
				tunnel 
			 tunnel-number | 
			 peer {ip-address | 
			 host-name}} [disable-fallback]
		  
                                               

                                              Example:
                                               
			 
                                              Router(config-pw-class)# preferred path peer 10.18.18.18
                                              
 
		  
                                              
 
                                                    		  
			 
                                               Specifies the MPLS traffic engineering tunnel or IP address or hostname to be used as the preferred path. 
			 
                                              
 
		   
      
                                              

                                              Step 6 
			  
				exit 
			  
		  
                                               

                                              Example:
                                               
			 
                                              Router(config-pw-class)# exit
                                              
 
		  
                                              
 
                                                    		  
			 
                                               Exits from pseudowire configuration mode. 
			 
                                              
 
		   
      
                                              

                                              Step 7 
			  
				interface 
			  
			  
				slot 
			 /port
		  
                                               

                                              Example:
                                               
			 
                                              Router(config)# interface atm1/1
                                              
 
		  
                                              
 
                                                    		  
			 
                                               Specifies an interface and enters interface configuration mode.
			 
                                              
 
		   
      
                                              

                                              Step 8 
			  
				encapsulation 
			  
			  
				encapsulation-type 
			  
		  
                                               

                                              Example:
                                               
			 
                                              Router(config-if)# encapsulation aal5
                                              
 
		  
                                              
 
                                                    		  
			 
                                               Specifies the encapsulation for the interface. 
			 
                                              
 
		   
      
                                              

                                              Step 9 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				pw-class 
				name 
			  
		  
                                               

                                              Example:
                                               
			 
                                              Router(config-if)# xconnect 10.0.0.1 123 pw-class ts1
                                              
 
		  
                                              
 
                                                    		  
			 
                                               Binds the attachment circuit to a pseudowire VC. 
			 
                                              
 
		   
      
                                              

                                              Step 10 
			  
				end 
			  
		  
                                               

                                              Example:
                                               
			 
                                              Router(config-if)# end
                                              
 
		  
                                              
 
                                                    		  
			 
                                               Exits interface configuration mode and returns to Privileged EXEC mode.
			 
                                              
 
		   
      
                                              

                                              

                                              Examples
                                              
		
		
                                               In the following example, the 
		  show 
			 mpls 
			 l2transport 
			 vc command shows the following information about the VCs:
		
                                              

		
                                              •  VC 101 has been assigned a preferred path called Tunnel1. The default path is disabled, because the preferred path specified that the default path should not be used if the preferred path fails. 
		  

                                                • 

                                              •  VC 150 has been assigned an IP address of a loopback address on PE2. The default path can be used if the preferred path fails. 
		  

                                                • 

                                              

		
                                               In the following example, command output that is bolded shows the preferred path information.
		
                                              
 
		
                                              Router# show mpls l2transport vc detail
Local interface: Gi0/0/0.1 up, line protocol up, Eth VLAN 222 up
  Destination address: 10.16.16.16, VC ID: 101, VC status: up
    Preferred path: Tunnel1,  active
    Default path: disabled
    Tunnel label: 3, next hop point2point
    Output interface: Tu1, imposed label stack {17 16}
  Create time: 00:27:31, last status change time: 00:27:31
  Signaling protocol: LDP, peer 10.16.16.16:0 up
    MPLS VC labels: local 25, remote 16
    Group ID: local 0, remote 6
    MTU: local 1500, remote 1500
    Remote interface description:
  Sequencing: receive disabled, send disabled
  VC statistics:
    packet totals: receive 10, send 10
    byte totals:   receive 1260, send 1300
    packet drops:  receive 0, send 0
Local interface: AT1/0/0 up, line protocol up, ATM AAL5 0/50 up
  Destination address: 10.16.16.16, VC ID: 150, VC status: up
    Preferred path: 10.18.18.18, active
    Default path: ready
    Tunnel label: 3, next hop point2point
    Output interface: Tu2, imposed label stack {18 24}
  Create time: 00:15:08, last status change time: 00:07:37
  Signaling protocol: LDP, peer 10.16.16.16:0 up
    MPLS VC labels: local 26, remote 24
    Group ID: local 2, remote 0
    MTU: local 4470, remote 4470
    Remote interface description:
  Sequencing: receive disabled, send disabled
  VC statistics:
    packet totals: receive 0, send 0
    byte totals:   receive 0, send 0
    packet drops:  receive 0, send 0
                                              

	 
                                              

                                              

                                              Troubleshooting Tips
                                              

                                              
You can use the debug mpls l2transport vc eventcommand to troubleshoot tunnel selection. For example, if the tunnel interface that is used for the preferred path is shut down, the default path is enabled. The debug mpls l2transport vc eventcommand provides the following output:
                                              

                                              AToM SMGR [10.2.2.2, 101]: Processing imposition update, vc_handle 62091860, update_action 3, remote_vc_label 16 
AToM SMGR [10.2.2.2, 101]: selected route no parent rewrite: tunnel not up 
AToM SMGR [10.2.2.2, 101]: Imposition Programmed, Output Interface: Et3/2 
                                              

                                              

                                              

                                              

                                              Setting Experimental Bits with AToM
                                              

                                               
		
                                               MPLS AToM uses the three experimental bits in a label to determine the queue of packets. You statically set the experimental bits in both the VC label and the LSP tunnel label, because the LSP tunnel label might be removed at the penultimate router. The following sections explain the transport-specific implementations of the EXP bits.
		
                                              
 
		

                                              Note
                                               For information about setting EXP bits on the Cisco 12000 series router for Cisco IOS Release 12.0(30)S, see the AToM: L2 QoS feature module. 
		
                                              

                                              
 
		

                                              Note
                                               
		  
                                               The following restrictions apply to ATM AAL5 over MPLS with EXP bits:
		  
                                              
 
		  
                                              •  ATM AAL5 over MPLS allows you to statically set the experimental bits.
			 

                                                • 

                                              •  If you do not assign values to the experimental bits, the priority bits in the header’s “tag control information” field are set to zero.
			 

                                                • 

                                              •  On the Cisco 7500 series routers, distributed Cisco Express Forwarding must be enabled before you set the experimental bits. 
			 

                                                • 

                                              
 
		  
                                               The following restrictions apply to ATM Cell Relay over MPLS with EXP bits:
		  
                                              
 
		  
                                              •  ATM Cell Relay over MPLS allows you to statically set the experimental bits in VC, PVP, and port modes. 
			 

                                                • 

                                              •  If you do not assign values to the experimental bits, the priority bits in the header’s “tag control information” field are set to zero.
			 

                                                • 

                                              •  On the Cisco 7500 series routers, distributed Cisco Express Forwarding must be enabled before you set the experimental bits. 
			 

                                                • 

                                              
 
		  
                                               The following restrictions apply to Ethernet over MPLS with EXP bits:
		  
                                              
 
		  
                                               
			  On the Cisco 7200 and 7500 Series Routers 
		  
                                              
 
		  
                                              •  Ethernet over MPLS allows you to set the EXP bits by using either of the following methods:
				
                                                •  Writing the priority bits into the experimental bit field, which is the default.
				  
                                                  • 

                                                •  Using the 
					 match 
						anycommand with the 
					 set 
						mpls 
						exp command.
				  
                                                  • 

                                                

			 
                                                

                                                • 

                                              •  If you do not assign values to the experimental bits, the priority bits in the 802.1Q header’s “tag control information” field are written into the experimental bit fields.
			 

                                                • 

                                              •  On the Cisco 7500 series routers, distributed Cisco Express Forwarding must be enabled before you set the experimental bits. 
			 

                                                • 

                                              
 
		  
                                               
			  On the Cisco 10720 Internet Router 
		  
                                              
 
		  
                                               The table below lists the commands that are supported on the Cisco 10720 Internet router for Ethernet over MPLS. The letter Y means that the command is supported on that interface. A dash (--) means that command is not supported on that interface.
		  
                                              
 
		  
                                               
			 

                                              Note
                                               The 
				match 
				  coscommand is supported only on subinterfaces, not main interfaces.
			 
                                              

                                              
 
		  
                                              
 
		
                                              
 
		

                                              Table 7 Commands Supported on the Cisco 10720 Router for Ethernet over MPLS
                                               
				  
                                               Commands
				  
                                              
 
				                                              		
 
				  
                                               Imposition
				  
                                              
 
				                                              		
 
				  
                                               Disposition
				  
                                              
 
				                                              		

                                              
                                              

                                               
				  
                                               
					  
						Traffic 
						Matching 
						Commands 
					  
				  
                                              
 
				                                              		
 
				  
                                               In
				  
                                              
 
				                                              		
 
				  
                                               Out
				  
                                              
 
				                                              		
 
				  
                                               In 
				  
                                              
 
				                                              		
 
				  
                                               Out
				  
                                              
 
				                                              		

                                              

                                               
				  
                                               
					  
						match 
						any 
					  
				  
                                              
 
				                                              		
 
				  
                                               Y
				  
                                              
 
				                                              		
 
				  
                                               Y
				  
                                              
 
				                                              		
 
				  
                                               Y
				  
                                              
 
				                                              		
 
				  
                                               Y
				  
                                              
 
				                                              		

                                              

                                               
				  
                                               
					  
						match 
						cos 
					  
				  
                                              
 
				                                              		
 
				  
                                               Y
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		

                                              

                                               
				  
                                               
					  
						match 
						input-interface 
					  
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		
 
				  
                                               Y
				  
                                              
 
				                                              		
 
				  
                                               Y
				  
                                              
 
				                                              		

                                              

                                               
				  
                                               
					  
						match 
						mpls 
						exp 
					  
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		
 
				  
                                               Y
				  
                                              
 
				                                              		
 
				  
                                               Y
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		

                                              

                                               
				  
                                               
					  
						match 
						qos-group 
					  
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		
 
				  
                                               Y
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		
 
				  
                                               Y
				  
                                              
 
				                                              		

                                              

                                               
				  
                                               
					  
						Traffic 
						Action 
						Commands 
					  
				  
                                              
 
				                                              		
 
				  
                                               In
				  
                                              
 
				                                              		
 
				  
                                               Out
				  
                                              
 
				                                              		
 
				  
                                               In 
				  
                                              
 
				                                              		
 
				  
                                               Out
				  
                                              
 
				                                              		

                                              

                                               
				  
                                               
					  
						set 
						cos 
					  
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		
 
				  
                                               Y
				  
                                              
 
				                                              		

                                              

                                               
				  
                                               
					  
						set 
						mpls 
						exp 
					  
				  
                                              
 
				                                              		
 
				  
                                               Y
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		

                                              

                                               
				  
                                               
					  
						set 
						qos-group 
					  
				  
                                              
 
				                                              		
 
				  
                                               Y
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		
 
				  
                                               Y
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		

                                              

                                               
				  
                                               
					  
						set 
						srp-priority 
					  
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		
 
				  
                                               Y
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		
 
				  
                                               --
				  
                                              
 
				                                              		

                                              
                                              

                                              

                                              
 
		
                                               The following restrictions apply to Frame Relay over MPLS and EXP bits:
		
                                              
 
		
                                              •  If you do not assign values to the experimental bits, the priority bits in the header's “tag control information” field are set to zero.
		  

                                                • 

                                              •  On the Cisco 7500 series routers, distributed Cisco Express Forwarding must be enabled before you set the experimental bits. 
		  

                                                • 

                                              
 
		
                                               The following restrictions apply to HDLC over MPLS and PPP over MPLS and EXP bits:
		
                                              
 
		
                                              •  If you do not assign values to the experimental bits, zeros are written into the experimental bit fields.
		  

                                                • 

                                              •  On the Cisco 7500 series routers, enable distributed Cisco Express Forwarding before setting the experimental bits. 
		  

                                                • 

                                              
 
		
                                               Set the experimental bits in both the VC label and the LSP tunnel label. You set the experimental bits in the VC label, because the LSP tunnel label might be removed at the penultimate router. Perform this task to set the experimental bits. 
		
                                              
 
	 
                                              
SUMMARY STEPS
                                                1.   
       
			  
				enable 
			  
		  
                                                

                                                2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                

                                                3.   
       
			  
				class-map 
			  
			  
				class-name 
			  
		  
                                                

                                                4.   
       
			  
				match 
				any 
			  
		  
                                                

                                                5.   
       
			  
				exit 
			  
		  
                                                

                                                6.   
       
			  
				policy-map 
			  
			  
				policy-name 
			  
		  
                                                

                                                7.   
       
			  
				class 
			  
			  
				class-name 
			  
		  
                                                

                                                8.   
       
			  
				set 
				mpls 
				experimental 
			  
			  
				value 
			  
		  
                                                

                                                9.   
       
			  
				exit 
			  
			  
				 
				 
			  
		  
                                                

                                                10.   
       
			  
				exit 
			  
		  
                                                

                                                11.   
       
			  
				interface 
			  
			  
				slot 
			 /port
		  
                                                

                                                12.   
       
			  
				service-policy 
				input 
			  
			  
				policy-name 
			  
		  
                                                

                                                13.   
       
			  
				exit 
			  
		  
                                                

                                                14.   
       
			  
				exit 
			  
		  
                                                

                                                15.   
       
			  
				show 
				policy-map 
				interface 
			  
			  
				interface-name 
			  [vc [vpi/] 
			 vci] [dlci 
			 dlci] [input | 
			 output] 
		  
                                                


                                              DETAILED STEPS
                                                 Command or ActionPurpose
                                                Step 1 
			  
				enable 
			  
		  
                                                 

                                                Example:
                                                 
			 
                                                Router> enable
                                                
 
		  
                                                
 
                                                      		  
			 
                                                 Enables privileged EXEC mode. 
			 
                                                
 
			 
                                                •  Enter your password if prompted.
				

                                                  • 

                                                
 
		   
      
                                                

                                                Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                 

                                                Example:
                                                 
			 
                                                Router# configure terminal
                                                
 
		  
                                                
 
                                                      		  
			 
                                                 Enters global configuration mode.
			 
                                                
 
		   
      
                                                

                                                Step 3 
			  
				class-map 
			  
			  
				class-name 
			  
		  
                                                 

                                                Example:
                                                 
			 
                                                Router(config)# class-map class1 
                                                
 
		  
                                                
 
                                                      		  
			 
                                                 Specifies the user-defined name of the traffic class and enters class map configuration mode. 
			 
                                                
 
		   
      
                                                

                                                Step 4 
			  
				match 
				any 
			  
		  
                                                 

                                                Example:
                                                 
			 
                                                Router(config-cmap)# match any
                                                
 
		  
                                                
 
                                                      		  
			 
                                                 Specifies that all packets will be matched. 
			 
                                                
 
			 
                                                •  Use only the 
				  any keyword. Other keywords might cause unexpected results.
				

                                                  • 

                                                
 
		   
      
                                                

                                                Step 5 
			  
				exit 
			  
		  
                                                 

                                                Example:
                                                 
			 
                                                Router(config-cmap)# exit
                                                
 
		  
                                                
 
                                                      		  
			 
                                                 Exits class map configuration mode.
			 
                                                
 
		   
      
                                                

                                                Step 6 
			  
				policy-map 
			  
			  
				policy-name 
			  
		  
                                                 

                                                Example:
                                                 
			 
                                                Router(config)# policy-map policy1 
                                                
 
		  
                                                
 
                                                      		  
			 
                                                 Specifies the name of the traffic policy to configure and enters policy-map configuration mode.
			 
                                                
 
		   
      
                                                

                                                Step 7 
			  
				class 
			  
			  
				class-name 
			  
		  
                                                 

                                                Example:
                                                 
			 
                                                Router(config-pmap)# class class1
                                                
 
		  
                                                
 
                                                      		  
			 
                                                 Specifies the name of the predefined traffic that was configured with the 
				class-map command and was used to classify traffic to the traffic policy specified, and enters policy-map class configuration mode. 
			 
                                                
 
		   
      
                                                

                                                Step 8 
			  
				set 
				mpls 
				experimental 
			  
			  
				value 
			  
		  
                                                 

                                                Example:
                                                 
			 
                                                Router(config-pmap-c)# set mpls experimental 7
                                                
 
		  
                                                
 
                                                      		  
			 
                                                 Designates the value to which the MPLS bits are set if the packets match the specified policy map. 
			 
                                                
 
		   
      
                                                

                                                Step 9 
			  
				exit 
			  
			  
				 
				 
			  
		  
                                                 

                                                Example:
                                                 
			 
                                                Router(config-pmap-c)# exit
                                                
 
		  
                                                
 
                                                      		  
			 
                                                 Exits policy-map class configuration mode.
			 
                                                
 
		   
      
                                                

                                                Step 10 
			  
				exit 
			  
		  
                                                 

                                                Example:
                                                 
			 
                                                Router(config-pmap)# exit
                                                
 
		  
                                                
 
                                                      		  
			 
                                                 Exits policy-map configuration mode. 
			 
                                                
 
		   
      
                                                

                                                Step 11 
			  
				interface 
			  
			  
				slot 
			 /port
		  
                                                 

                                                Example:
                                                 
			 
                                                Router(config)# interface atm4/0 
                                                
 
		  
                                                
 
                                                      		  
			 
                                                 Specifies the interface and enters interface configuration mode.
			 
                                                
 
		   
      
                                                

                                                Step 12 
			  
				service-policy 
				input 
			  
			  
				policy-name 
			  
		  
                                                 

                                                Example:
                                                 
			 
                                                Router(config-if)# service-policy input policy1 
                                                
 
		  
                                                
 
                                                      		  
			 
                                                 Attaches a traffic policy to an interface.
			 
                                                
 
		   
      
                                                

                                                Step 13 
			  
				exit 
			  
		  
                                                 

                                                Example:
                                                 
			 
                                                Router(config-if)# exit
                                                
 
		  
                                                
 
                                                      		  
			 
                                                 Exits interface configuration mode. 
			 
                                                
 
		   
      
                                                

                                                Step 14 
			  
				exit 
			  
		  
                                                 

                                                Example:
                                                 
			 
                                                Router(config)# exit
                                                
 
		  
                                                
 
                                                      		  
			 
                                                 Exits global configuration mode. 
			 
                                                
 
		   
      
                                                

                                                Step 15 
			  
				show 
				policy-map 
				interface 
			  
			  
				interface-name 
			  [vc [vpi/] 
			 vci] [dlci 
			 dlci] [input | 
			 output] 
		  
                                                 

                                                Example:
                                                 
			 
                                                Router# show policy-map interface serial3/0 
                                                
 
		  
                                                
 
                                                      		  
			 
                                                 Displays the traffic policy attached to an interface.
			 
                                                
 
		   
      
                                                

                                                

                                                

                                                

                                                Setting the Frame Relay Discard Eligibility Bit on the Cisco 7200 and 7500 Series Routers
                                                

                                                
      
                                                
You can use the DE bit in the address field of a Frame Relay frame to prioritize frames in congested Frame Relay networks. The Frame Relay DE bit has only one bit and can therefore only have two settings, 0 or 1. If congestion occurs in a Frame Relay network, frames with the DE bit set to 1 are discarded before frames with the DE bit set to 0. Therefore, important traffic should have the DE bit set to 0, and less important traffic should be forwarded with the DE bit set at 1. The default DE bit setting is 0. You can change the DE bit setting to 1 with the set fr-de command. 
                                                

      

                                                Note
                                                
The set fr-de command can be used only in an output service policy.
                                                

                                                

      
                                                
Perform this task to set the Frame Relay DE bit on the Cisco 7200 and 7500 series routers.
                                                

    
                                                
SUMMARY STEPS
                                                  1.   
      
          
            enable
          
        
                                                  

                                                  2.   
      
          
            configure
          
          
            terminal
          
        
                                                  

                                                  3.   
      
          
            policy-map
          
          
            policy-name
          
        
                                                  

                                                  4.   
      
          
            class
          
          
            class-name
          
        
                                                  

                                                  5.   
      
          
            set
            fr-de
          
        
                                                  

                                                  6.   
      
          
            end
          
        
                                                  


                                                DETAILED STEPS
                                                   Command or ActionPurpose
                                                  Step 1
          
            enable
          
        
                                                   

                                                  Example:
                                                  
          
                                                  Router> enable
                                                  

        
                                                  
 
                                                        		 
          
                                                  
Enables privileged EXEC mode. 
                                                  

          
                                                  • 
Enter your password if prompted.

                                                    • 

                                                  

         
      
                                                  

                                                  Step 2
          
            configure
          
          
            terminal
          
        
                                                   

                                                  Example:
                                                  
          
                                                  Router# configure terminal
                                                  

        
                                                  
 
                                                        		 
          
                                                  
Enters global configuration mode.
                                                  

         
      
                                                  

                                                  Step 3
          
            policy-map
          
          
            policy-name
          
        
                                                   

                                                  Example:
                                                  
          
                                                  Router(config)# policy-map policy1
                                                  

        
                                                  
 
                                                        		 
          
                                                  
Specifies the name of the traffic policy to configure and enters policy-map configuration mode. 
                                                  

          
                                                  • 
Names can be a maximum of 40 alphanumeric characters.

                                                    • 

                                                  

         
      
                                                  

                                                  Step 4
          
            class
          
          
            class-name
          
        
                                                   

                                                  Example:
                                                  
          
                                                  Router(config-pmap)# class class1 
                                                  

        
                                                  
 
                                                        		 
          
                                                  
Specifies the name of a predefined traffic class and enters policy-map class configuration mode. 
                                                  

         
      
                                                  

                                                  Step 5
          
            set
            fr-de
          
        
                                                   

                                                  Example:
                                                  
          
                                                  Router(config-pmap-c)# set fr-de
                                                  

        
                                                  
 
                                                        		 
          
                                                  
Sets the Frame Relay DE bit setting for all packets that match the specified traffic class from 0 to 1. 
                                                  

         
      
                                                  

                                                  Step 6
          
            end
          
        
                                                   

                                                  Example:
                                                  
          
                                                  Router(config-pmap-c)# end
                                                  

        
                                                  
 
                                                        		 
          
                                                  
Exits policy-map class configuration mode and returns to privileged EXEC mode.
                                                  

         
      
                                                  

                                                  

                                                  

                                                  

                                                  Matching the Frame Relay DE Bit on the Cisco 7200 and 7500 Series Routers
                                                  

                                                  
      
                                                  
You can use the match fr-decommand to enable frames with a DE bit setting of 1 to be considered a member of a defined class and forwarded according to the specifications set in the service policy. 
                                                  

      
                                                  
Perform this task to match frames with the FR DE bit set to 1.
                                                  

    
                                                  
SUMMARY STEPS
                                                    1.   
      
          
            enable
          
        
                                                    

                                                    2.   
      
          
            configure
          
          
            terminal
          
        
                                                    

                                                    3.   
      
          
            class-map
          
          
            class-map-name
          
        
                                                    

                                                    4.   
      
          
            match
            fr-de
          
        
                                                    

                                                    5.   
      
          
            end
          
        
                                                    


                                                  DETAILED STEPS
                                                     Command or ActionPurpose
                                                    Step 1
          
            enable
          
        
                                                     

                                                    Example:
                                                    
          
                                                    Router> enable
                                                    

        
                                                    
 
                                                          		 
          
                                                    
Enables privileged EXEC mode. 
                                                    

          
                                                    • 
Enter your password if prompted.

                                                      • 

                                                    

         
      
                                                    

                                                    Step 2
          
            configure
          
          
            terminal
          
        
                                                     

                                                    Example:
                                                    
          
                                                    Router# configure terminal
                                                    

        
                                                    
 
                                                          		 
          
                                                    
Enters global configuration mode.
                                                    

         
      
                                                    

                                                    Step 3
          
            class-map
          
          
            class-map-name
          
        
                                                     

                                                    Example:
                                                    
          
                                                    Router(config)# class-map de-bits
                                                    

        
                                                    
 
                                                          		 
          
                                                    
Specifies the name of a predefined traffic class and enters class-map configuration mode. 
                                                    

         
      
                                                    

                                                    Step 4
          
            match
            fr-de
          
        
                                                     

                                                    Example:
                                                    
          
                                                    Router(config-cmap)# match fr-de
                                                    

        
                                                    
 
                                                          		 
          
                                                    
Classifies all frames with the DE bit set to 1. 
                                                    

         
      
                                                    

                                                    Step 5
          
            end
          
        
                                                     

                                                    Example:
                                                    
          
                                                    Router(config-cmap)# end
                                                    

        
                                                    
 
                                                          		 
          
                                                    
Exits class-map configuration mode and returns to privileged EXEC mode.
                                                    

         
      
                                                    

                                                    

                                                    

                                                    

                                                    Enabling the Control Word
                                                    

                                                    
      
                                                    
You can enable the control word for dynamic and static pseudowires under a pseudowire class. Use the control-word command to enable, disable, or set a control word to autosense mode. If you do not enable a control word, autosense is the default mode for the control word.
                                                    

      
                                                    
Perform this task to enable a control word.
                                                    

    
                                                    
SUMMARY STEPS
                                                      1.   
      
          
            enable
          
        
                                                      

                                                      2.   
      
          
            configure
          
          
            terminal
          
        
                                                      

                                                      3.   
      
          
            pseudowire-class
            cw_enable
          
        
                                                      

                                                      4.   
      
          
            encapsulation
            mpls
          
          
            
            
          
        
                                                      

                                                      5.   
      
          
            control-word
          
          
            
            
          
        
                                                      

                                                      6.   
      
          
            exit
          
          
            
            
          
        
                                                      

                                                      7.   
      
          
            exit
          
        
                                                      


                                                    DETAILED STEPS
                                                       Command or ActionPurpose
                                                      Step 1
          
            enable
          
        
                                                       

                                                      Example:
                                                      
          
                                                      Router> enable
                                                      

        
                                                      
 
                                                            		 
          
                                                      
Enables privileged EXEC mode. 
                                                      

          
                                                      • 
Enter your password if prompted.

                                                        • 

                                                      

         
      
                                                      

                                                      Step 2
          
            configure
          
          
            terminal
          
        
                                                       

                                                      Example:
                                                      
          
                                                      Router# configure terminal
                                                      

        
                                                      
 
                                                            		 
          
                                                      
Enters global configuration mode.
                                                      

         
      
                                                      

                                                      Step 3
          
            pseudowire-class
            cw_enable
          
        
                                                       

                                                      Example:
                                                      
          
                                                      Router(config)# pseudowire-class cw_enable
                                                      

        
                                                      
 
                                                            		 
          
                                                      
Enters pseudowire class configuration mode. 
                                                      

         
      
                                                      

                                                      Step 4
          
            encapsulation
            mpls
          
          
            
            
          
        
                                                       

                                                      Example:
                                                      
          
                                                      Router(config-pw-class)# encapsulation mpls 
                                                      

        
                                                      
 
                                                            		 
          
                                                      
Specifies the tunneling encapsulation. 
                                                      

          
                                                      • 
For AToM, the encapsulation type is mpls.

                                                        • 

                                                      

         
      
                                                      

                                                      Step 5
          
            control-word
          
          
            
            
          
        
                                                       

                                                      Example:
                                                      
          
                                                      Router(config-pw-class)# control-word 
                                                      

        
                                                      
 
                                                            		 
          
                                                      
Enables the control word. 
                                                      

         
      
                                                      

                                                      Step 6
          
            exit
          
          
            
            
          
        
                                                       

                                                      Example:
                                                      
          
                                                      Router(config-pw-class)# exit 
                                                      

        
                                                      
 
                                                            		 
          
                                                      
Exits pseudowire class configuration mode and returns to global configuration mode. 
                                                      

         
      
                                                      

                                                      Step 7
          
            exit
          
        
                                                       

                                                      Example:
                                                      
          
                                                      Router(config)# exit
                                                      

        
                                                      
 
                                                            		 
          
                                                      
Exits global configuration mode.
                                                      

         
      
                                                      

                                                      

                                                      

                                                      

                                                      

                                                      Configuration Examples for Any Transport over MPLS
                                                      

                                                       
	 
                                                      

                                                      

                                                      Example  ATM AAL5 over MPLS
                                                      

                                                      
    
                                                      

                                                      ATM AAL5 over MPLS on PVCs
                                                      
      
      
                                                      
The following example shows how to enable ATM AAL5 over MPLS on an ATM PVC:
                                                      

      
                                                      enable
 configure terminal
 interface atm1/
0
 pvc 1/
200 l2transport
 encapsulation aal5
 xconnect 10.13.13.13 100 encapsulation mpls
                                                      

    
                                                      

                                                      ATM AAL5 over MPLS in VC Class Configuration Mode
                                                      
      
      
                                                      
The following example shows how to configure ATM AAL5 over MPLS in VC class configuration mode. The VC class is then applied to an interface.
                                                      

      
                                                      enable
configure terminal
vc-class atm aal5class
encapsulation aal5
interface atm1/
0
class-int aal5class
pvc 1/
200 l2transport
xconnect 10.13.13.13 100 encapsulation mpls

                                                      

      
                                                      
The following example shows how to configure ATM AAL5 over MPLS in VC class configuration mode. The VC class is then applied to a PVC.
                                                      

      
                                                      enable
configure terminal
vc-class atm aal5class
encapsulation aal5
interface atm1/
0
pvc 1/
200 l2transport
class-vc aal5class
xconnect 10.13.13.13 100 encapsulation mpls
                                                      

    
                                                      

                                                      

                                                      

                                                      Example  OAM Cell Emulation for ATM AAL5 over MPLS
                                                      

                                                      
    
                                                      

                                                      OAM Cell Emulation for ATM AAL5 over MPLS on PVCs
                                                      
      
      
                                                      
The following example shows how to enable OAM cell emulation on an ATM PVC:
                                                      

      
                                                      interface ATM 1/0/0
pvc 1/200 l2transport
encapsulation aal5
xconnect 10.13.13.13 100 encapsulation mpls 
oam-ac emulation-enable
oam-pvc manage

                                                      

      
                                                      
The following example shows how to set the rate at which an AIS cell is sent every 30 seconds:
                                                      

      
                                                      interface ATM 1/0/0
pvc 1/200 l2transport
encapsulation aal5
xconnect 10.13.13.13 100 encapsulation mpls 
oam-ac emulation-enable 30
oam-pvc manage
                                                      

    
                                                      

                                                      OAM Cell Emulation for ATM AAL5 over MPLS in VC Class Configuration Mode
                                                      
      
      
                                                      
The following example shows how to configure OAM cell emulation for ATM AAL5 over MPLS in VC class configuration mode. The VC class is then applied to an interface.
                                                      

      
                                                      enable
configure terminal
vc-class atm oamclass
encapsulation aal5
oam-ac emulation-enable 30
oam-pvc manage
interface atm1/0
class-int oamclass
pvc 1/200 l2transport
xconnect 10.13.13.13 100 encapsulation mpls

                                                      

      
                                                      
The following example shows how to configure OAM cell emulation for ATM AAL5 over MPLS in VC class configuration mode. The VC class is then applied to a PVC.
                                                      

      
                                                      enable
configure terminal
vc-class atm oamclass
encapsulation aal5
oam-ac emulation-enable 30
oam-pvc manage
interface atm1/0
pvc 1/200 l2transport
class-vc oamclass
xconnect 10.13.13.13 100 encapsulation mpls

                                                      

      
                                                      
The following example shows how to configure OAM cell emulation for ATM AAL5 over MPLS in VC class configuration mode. The VC class is then applied to an interface. One PVC is configured with OAM cell emulation at an AIS rate of 10. That PVC uses the AIS rate of 10 instead of 30.
                                                      

      
                                                      enable
configure terminal
vc-class atm oamclass
encapsulation aal5
oam-ac emulation-enable 30
oam-pvc manage
interface atm1/0
class-int oamclass
pvc 1/200 l2transport
oam-ac emulation-enable 10
xconnect 10.13.13.13 100 encapsulation mpls
                                                      

    
                                                      

                                                      

                                                      

                                                      Example  ATM Cell Relay over MPLS
                                                      

                                                      
    
                                                      

                                                      ATM Cell Relay over MPLS in VC Mode Using VC Class Configuration Mode
                                                      
      
      
                                                      
The following example shows how to configure ATM cell relay over MPLS in VC class configuration mode. The VC class is then applied to an interface.
                                                      

      
                                                      enable
configure terminal
vc-class atm cellrelay
encapsulation aal0
interface atm1/0
class-int cellrelay
pvc 1/200 l2transport
xconnect 10.13.13.13 100 encapsulation mpls

                                                      

      
                                                      
The following example shows how to configure ATM cell relay over MPLS in VC class configuration mode. The VC class is then applied to a PVC.
                                                      

      
                                                      enable
configure terminal
vc-class atm cellrelay
encapsulation aal0
interface atm1/0
pvc 1/200 l2transport
class-vc cellrelay
                                                      

      
                                                      
xconnect 10.13.13.13 100 encapsulation mpls
                                                      

    
                                                      

                                                      ATM Cell Relay over MPLS in PVP Mode
                                                      
      
      
                                                      
The following example shows how to transport single ATM cells over a virtual path:
                                                      

      
                                                      pseudowire-class vp-cell-relay
encapsulation mpls
interface atm 5/0 
atm pvp 1 l2transport 
xconnect 10.0.0.1 123 pw-class vp-cell-relay
                                                      

    
                                                      

                                                      ATM Cell Relay over MPLS in Port Mode
                                                      
      
      
                                                      
The following example shows how to configure interface ATM 5/0 to transport ATM cell relay packets: 
                                                      

      
                                                      pseudowire-class atm-cell-relay
encapsulation mpls
interface atm 5/0 
xconnect 10.0.0.1 123 pw-class atm-cell-relay

                                                      

      
                                                      
The following example shows how to configure interface ATM 9/0/0 to transport ATM cell relay packets on a Cisco 7600 series router, where you must specify the interface ATM slot, bay, and port: 
                                                      

      
                                                      pseudowire-class atm-cell-relay
encapsulation mpls
interface atm 9/0/0 
xconnect 10.0.0.1 500 pw-class atm-cell-relay
                                                      

    
                                                      

                                                      

                                                      

                                                      Example  ATM Single Cell Relay over MPLS
                                                      

                                                      
    
                                                      

                                                      ATM Packed Cell Relay over MPLS in VC Mode 
                                                      
      
      
                                                      
The following example shows that ATM PVC 1/100 is an AToM cell relay PVC. There are three timers set up, with values of 1000 milliseconds, 800 milliseconds, and 500 milliseconds, respectively. The cell-packing command specifies that five ATM cells are to be packed into an MPLS packet. The cell-packing command also specifies that timer 1 is to be used. 
                                                      

      
                                                      interface atm 1/0
shutdown
atm mcpt-timer 1000 800 500
no shutdown
pvc 1/100 l2transport
encapsulation aal0
xconnect 10.0.0.1 123 encapsulation mpls
                                                      

      
                                                      
cell-packing 5 mcpt-timer 1
                                                      

    
                                                      

                                                      ATM Packed Cell Relay over MPLS in VC Mode Using VC Class Configuration Mode
                                                      
      
      
                                                      
The following example shows how to configure ATM cell relay over MPLS with cell packing in VC class configuration mode. The VC class is then applied to an interface.
                                                      

      
                                                      enable
configure terminal
vc-class atm cellpacking
encapsulation aal0
cell-packing 10 mcpt-timer 1
interface atm1/0
shutdown
atm mcpt-timers 100 200 250
no shutdown
class-int cellpacking 
pvc 1/200 l2transport
xconnect 10.13.13.13 100 encapsulation mpls

                                                      

      
                                                      
The following example shows how to configure ATM cell relay over MPLS in VC class configuration mode. The VC class is then applied to a PVC.
                                                      

      
                                                      enable
configure terminal
vc-class atm cellpacking 
encapsulation aal0
cell-packing 10 mcpt-timer 1
interface atm1/0
shutdown
atm mcpt-timers 100 200 250
no shutdown
pvc 1/200 l2transport
class-vc cellpacking 
xconnect 10.13.13.13 100 encapsulation mpls
                                                      

    
                                                      

                                                      ATM Packed Cell Relay over MPLS in VP Mode
                                                      
      
      
                                                      
The following example shows packed cell relay enabled on an interface configured for PVP mode. The cell-packing command specifies that 10 ATM cells are to be packed into an MPLS packet. The cell-packing command also specifies that timer 2 is to be used.
                                                      

      
                                                      interface atm 1/0
shutdown
atm mcpt-timer 1000 800 500
no shutdown
atm pvp 100 l2transport
xconnect 10.0.0.1 234 encapsulation mpls
cell-packing 10 mcpt-timer 2
                                                      

    
                                                      

                                                      ATM Packed Cell Relay over MPLS in Port Mode
                                                      
      
      
                                                      
The following example shows packed cell relay enabled on an interface set up for port mode. The cell-packing command specifies that 10 ATM cells are to be packed into an MPLS packet. The cell-packing command also specifies that timer 2 is to be used.
                                                      

      
                                                      interface atm 5/0 
shutdown
atm mcpt-timer 1000 800 500
no shutdown
cell-packing 10 mcpt-timer 2
xconnect 10.0.0.1 123 encapsulation mpls
                                                      

    
                                                      

                                                      

                                                      

                                                      Example  Ethernet over MPLS
                                                      

                                                      
    
                                                      

                                                      Ethernet over MPLS in Port Mode
                                                      
      
      
                                                      
The following example shows how to configure VC 123 in Ethernet port mode:
                                                      

      
                                                      pseudowire-class ethernet-port
encapsulation mpls
 
int gigabitethernet1/0 
xconnect 10.0.0.1 123 pw-class ethernet-port
                                                      

    
                                                      

                                                      Ethernet over MPLS with VLAN ID Rewrite
                                                      
      
      
                                                      
The following example shows how to configure VLAN ID rewrite on peer PE routers with Cisco 12000 series router engine 2 3-port Gigabit Ethernet line cards.
                                                      

      

                                                      
                
                                                      
PE1
                                                      

                                                                    		

                
                                                      
PE2
                                                      

                                                                    		

                                                      
                                                      

                                                      
                
                                                      interface GigabitEthernet0/0.2
encapsulation dot1Q 2
no ip directed-broadcast
no cdp enable
xconnect 10.5.5.5 2 encapsulation mpls
remote circuit id 3
                                                      

              
                                                      
                                                      		

                                                      
                
                                                      interface GigabitEthernet3/0.2
encapsulation dot1Q 3
no ip directed-broadcast
no cdp enable
xconnect 10.3.3.3 2 encapsulation mpls
remote circuit id 2
                                                      

              
                                                      
                                                      		

                                                      
                                                      

                                                      

                                                      

    
                                                      

                                                      

                                                      

                                                      Example  Tunnel Selection
                                                      

                                                      
      
                                                      
The following example shows how to set up two preferred paths for PE1. One preferred path specifies an MPLS traffic engineering tunnel. The other preferred path specifies an IP address of a loopback address on PE2. There is a static route configured on PE1 that uses a TE tunnel to reach the IP address on PE2. 
                                                      

    
                                                      

                                                      PE1 Configuration 
                                                      
      
      
                                                      mpls label protocol ldp
mpls traffic-eng tunnels
tag-switching tdp router-id Loopback0
pseudowire-class pw1
 encapsulation mpls
 preferred-path interface Tunnel1 disable-fallback
!
pseudowire-class pw2
 encapsulation mpls
 preferred-path peer 10.18.18.18
!
interface Loopback0
 ip address 10.2.2.2 255.255.255.255
 no ip directed-broadcast
 no ip mroute-cache
!
interface Tunnel1
 ip unnumbered Loopback0
 no ip directed-broadcast
 tunnel destination 10.16.16.16
 tunnel mode mpls traffic-eng
 tunnel mpls traffic-eng priority 7 7
 tunnel mpls traffic-eng bandwidth 1500
 tunnel mpls traffic-eng path-option 1 explicit name path-tu1
!
interface Tunnel2
 ip unnumbered Loopback0
 no ip directed-broadcast
 tunnel destination 10.16.16.16
 tunnel mode mpls traffic-eng
 tunnel mpls traffic-eng priority 7 7
 tunnel mpls traffic-eng bandwidth 1500
 tunnel mpls traffic-eng path-option 1 dynamic
!
interface gigabitethernet0/0/0
 no ip address
 no ip directed-broadcast
 no negotiation auto
!
interface gigabitethernet0/0/0.1
 encapsulation dot1Q 222
 no ip directed-broadcast
 xconnect 10.16.16.16 101 pw-class pw1
!
interface ATM1/0/0
 no ip address
 no ip directed-broadcast
 no atm enable-ilmi-trap
 no atm ilmi-keepalive
 pvc 0/50 l2transport
  encapsulation aal5
  xconnect 10.16.16.16 150 pw-class pw2
!
interface Ethernet2/0/1
 ip address 10.0.0.1 255.255.255.0
 no ip directed-broadcast
 tag-switching ip
 mpls traffic-eng tunnels
 ip rsvp bandwidth 15000 15000
!
router ospf 1
 log-adjacency-changes
 network 10.0.0.0 0.0.0.255 area 0
 network 10.2.2.2 0.0.0.0 area 0
 mpls traffic-eng router-id Loopback0
 mpls traffic-eng area 0
!
ip route 10.18.18.18 255.255.255.255 Tunnel2
!
ip explicit-path name path-tu1 enable
 next-address 10.0.0.1
 index 3 next-address 10.0.0.1
                                                      

    
                                                      

                                                      PE2 Configuration 
                                                      
      
      
                                                      mpls label protocol ldp
mpls traffic-eng tunnels
mpls ldp router-id Loopback0
interface Loopback0
 ip address 10.16.16.16 255.255.255.255
 no ip directed-broadcast
 no ip mroute-cache
!
interface Loopback2
 ip address 10.18.18.18 255.255.255.255
 no ip directed-broadcast
!
interface Ethernet3/1
 ip address 10.0.0.2 255.255.255.0
 no ip directed-broadcast
 mpls traffic-eng tunnels
 mpls ip
 no cdp enable
 ip rsvp bandwidth 15000 15000
!
interface Ethernet3/3 
 no ip address 
 no ip directed-broadcast 
 no cdp enable 
! 
interface Ethernet3/3.1 
 encapsulation dot1Q 222 
 no ip directed-broadcast 
 no cdp enable 
 mpls l2transport route 10.2.2.2 101 
! 
interface ATM5/0
 no ip address
 no ip directed-broadcast
 no atm enable-ilmi-trap
 no atm ilmi-keepalive
 pvc 0/50 l2transport
  encapsulation aal5
  xconnect 10.2.2.2 150 encapsulation mpls
!
router ospf 1
 log-adjacency-changes
 network 10.0.0.0 0.0.0.255 area 0
 network 10.16.16.16 0.0.0.0 area 0
 mpls traffic-eng router-id Loopback0
 mpls traffic-eng area 0
                                                      

    
                                                      

                                                      

                                                      

                                                      Example  Setting Frame Relay Discard Eligibility Bit on the Cisco 7200 and 7500 Series Routers
                                                      

                                                      
      
                                                      
The following example shows how to configure the service policy called set-de and attach it to an interface. In this example, the class map called data evaluates all packets exiting the interface for an IP precedence value of 1. If the exiting packet has been marked with the IP precedence value of 1, the packet’s DE bit is set to 1.
                                                      

      
                                                      class-map data 
match ip precedence 1 
policy-map set-de 
class data 
set fr-de 
interface Serial0/0/0 
encapsulation frame-relay 
interface Serial0/0/0.1 point-to-point 
ip address 192.168.249.194 255.255.255.252 
frame-relay interface-dlci 100 
service output set-de 
                                                      

    
                                                      

                                                      

                                                      

                                                      Example  Matching Frame Relay DE Bit on the Cisco 7200 and 7500 Series Routers
                                                      

                                                      
      
                                                      
The following example shows how to configure the service policy called match-de and attach it to an interface. In this example, the class map called data evaluates all packets entering the interface for a DE bit setting of 1. If the entering packet has been a DE bit value of 1, the packet’s EXP bit setting is set to 3.
                                                      

      
                                                      class-map data 
match fr-de 
policy-map match-de
class data 
set mpls exp 3 
ip routing 
ip cef distributed 
mpls label protocol ldp 
interface Loopback0 
 ip address 10.20.20.20 255.255.255.255 
interface Ethernet1/0/0 
 ip address 10.0.0.2 255.255.255.0 
 mpls ip 
interface Serial4/0/0 
 encapsulation frame-relay 
service input match-de 
connect 100 Serial4/0/0 100 l2transport 
                                                      

      
                                                      
 xconnect 10.10.10.10 100 encapsulation mpls
                                                      

    
                                                      

                                                      

                                                      

                                                      Example ATM over MPLS
                                                      

                                                       
		
                                                       The table below shows the configuration of ATM over MPLS on two PE routers. 
		
                                                      
 
		

                                                      Table 8 ATM over MPLS Configuration Example
                                                       
				  
                                                       PE1 
				  
                                                      
 
				                                                      		
 
				  
                                                       PE2 
				  
                                                      
 
				                                                      		

                                                      
                                                      

                                                       
				  
                                                      mpls label protocol ldp
                                                      
 
				  
                                                       mpls ldp router-id Loopback0 force
                                                      
 
				  
                                                      !
                                                      
 
				  
                                                      interface Loopback0
                                                      
 
				  
                                                       ip address 10.16.12.12 255.255.255.255
                                                      
 
				  
                                                      ! 
                                                      
 
				  
                                                      interface ATM4/0
                                                      
 
				  
                                                       pvc 0/100 l2transport
                                                      
 
				  
                                                         encapsulation aal0
                                                      
 
				  
                                                         xconnect 10.13.13.13 100 encapsulation mpls
                                                      
 
				  
                                                      ! 
                                                      
 
				  
                                                      interface ATM4/0.300 point-to-point
                                                      
 
				  
                                                       no ip directed-broadcast
                                                      
 
				  
                                                       no atm enable-ilmi-trap
                                                      
 
				  
                                                       pvc 0/300 l2transport
                                                      
 
				  
                                                         encapsulation aal0
                                                      
 
				  
                                                         xconnect 10.13.13.13 300 encapsulation mpls
                                                      
 
				
                                                      
                                                      		

                                                       
				  
                                                      mpls label protocol ldp
                                                      
 
				  
                                                       mpls ldp router-id Loopback0 force
                                                      
 
				  
                                                      !
                                                      
 
				  
                                                      interface Loopback0
                                                      
 
				  
                                                       ip address 10.13.13.13 255.255.255.255
                                                      
 
				  
                                                       
                                                      
 
				  
                                                      interface ATM4/0
                                                      
 
				  
                                                        pvc 0/100 l2transport
                                                      
 
				  
                                                          encapsulation aal0
                                                      
 
				  
                                                          xconnect 10.16.12.12 100 encapsulation mpls
                                                      
 
				  
                                                      !
                                                      
 
				  
                                                      interface ATM4/0.300 point-to-point
                                                      
 
				  
                                                       no ip directed-broadcast
                                                      
 
				  
                                                       no atm enable-ilmi-trap
                                                      
 
				  
                                                       pvc 0/300 l2transport
                                                      
 
				  
                                                         encapsulation aal0
                                                      
 
				  
                                                         xconnect 10.16.12.12 300 encapsulation mpls
                                                      
 
				
                                                      
                                                      		

                                                      
                                                      

                                                      

                                                      
 
	 
                                                      

                                                      

                                                      

                                                      Example Ethernet over MPLS with MPLS Traffic Engineering Fast Reroute
                                                      

                                                       
		
                                                       The following configuration example and the figure below show the configuration of Ethernet over MPLS with fast reroute on AToM PE routers. 
		
                                                      
 
		
                                                       Routers PE1 and PE2 have the following characteristics: 
		
                                                      
 
		
                                                      •  A TE tunnel called Tunnel41 is configured between PE1and PE2, using an explicit path through a link called L1. AToM VCs are configured to travel through the FRR-protected tunnel Tunnel41. 
		  

                                                        • 

                                                      •  The link L1 is protected by FRR, the backup tunnel is Tunnel1. 
		  

                                                        • 

                                                      •  PE2 is configured to forward the AToM traffic back to PE1 through the L2 link. 
		  

                                                        • 

                                                      
 
		
                                                      Figure 2. Fast Reroute Configuration

                                                      
 
		
                                                       PE1 Configuration 
		
                                                      
 
		
                                                      mpls label protocol ldp
mpls traffic-eng tunnels
mpls ldp router-id Loopback1 force
!
pseudowire-class T41
 encapsulation mpls
 preferred-path interface Tunnel41 disable-fallback
!
pseudowire-class IP1
 encapsulation mpls
 preferred-path peer 10.4.0.1 disable-fallback
!
interface Loopback1
 ip address 10.0.0.27 255.255.255.255
!
interface Tunnel1
 ip unnumbered Loopback1
 tunnel destination 10.0.0.1
 tunnel mode mpls traffic-eng
 tunnel mpls traffic-eng priority 1 1
 tunnel mpls traffic-eng bandwidth 10000
 tunnel mpls traffic-eng path-option 1 explicit name FRR
!
interface Tunnel41
 ip unnumbered Loopback1
 tunnel destination 10.0.0.4
 tunnel mode mpls traffic-eng
 tunnel mpls traffic-eng priority 1 1
 tunnel mpls traffic-eng bandwidth 1000
 tunnel mpls traffic-eng path-option 1 explicit name name-1
 tunnel mpls traffic-eng fast-reroute
!
interface POS0/0
 description pe1name POS8/0/0
 ip address 10.1.0.2 255.255.255.252
 mpls traffic-eng tunnels
 mpls traffic-eng backup-path Tunnel1
 crc 16
 clock source internal
 pos ais-shut
 pos report lrdi
 ip rsvp bandwidth 155000 155000
!
interface POS0/3
 description pe1name POS10/1/0
 ip address 10.1.0.14 255.255.255.252
 mpls traffic-eng tunnels
 crc 16   
 clock source internal
 ip rsvp bandwidth 155000 155000
!
interface gigabitethernet3/0.1
 encapsulation dot1Q 203
 xconnect 10.0.0.4 2 pw-class IP1
!         
interface gigabitethernet3/0.2
 encapsulation dot1Q 204
 xconnect 10.0.0.4 4 pw-class T41
!
router ospf 1
 network 10.0.0.0 0.255.255.255 area 0
 mpls traffic-eng router-id Loopback1
 mpls traffic-eng area 0
!
ip classless
ip route 10.4.0.1 255.255.255.255 Tunnel41
!
ip explicit-path name xxxx-1 enable
 next-address 10.4.1.2
 next-address 10.1.0.10
                                                      
 
	 
                                                      

                                                      P Configuration
                                                       
		 
		
                                                      ip cef
mpls traffic-eng tunnels
!
interface Loopback1
 ip address 10.0.0.1 255.255.255.255
!
interface FastEthernet1/0/0
 ip address 10.4.1.2 255.255.255.0
 mpls traffic-eng tunnels
 ip rsvp bandwidth 10000 10000
!
interface POS8/0/0
 description xxxx POS0/0
 ip address 10.1.0.1 255.255.255.252
 mpls traffic-eng tunnels
 pos ais-shut
 pos report lrdi
 ip rsvp bandwidth 155000 155000
!
interface POS10/1/0
 description xxxx POS0/3
 ip address 10.1.0.13 255.255.255.252
 mpls traffic-eng tunnels
 ip rsvp bandwidth 155000 155000
!
router ospf 1
 network 10.0.0.0 0.255.255.255 area 0
 mpls traffic-eng router-id Loopback1
 mpls traffic-eng area 0
                                                      
 
	 
                                                      

                                                      PE2 Configuration 
                                                       
		 
		
                                                      ip cef
mpls label protocol ldp
mpls traffic-eng tunnels
mpls ldp router-id Loopback1 force
!
interface Loopback1
 ip address 10.0.0.4 255.255.255.255
!
interface loopback 2
ip address 10.4.0.1 255.255.255.255
!
interface Tunnel27
 ip unnumbered Loopback1
 tunnel destination 10.0.0.27
 tunnel mode mpls traffic-eng
 tunnel mpls traffic-eng autoroute announce
 tunnel mpls traffic-eng priority 1 1
 tunnel mpls traffic-eng bandwidth 1000
 tunnel mpls traffic-eng path-option 1 explicit name xxxx-1
!
interface FastEthernet0/0.2
 encapsulation dot1Q 203
 xconnect 10.0.0.27 2 encapsulation mpls
!
interface FastEthernet0/0.3
 encapsulation dot1Q 204
 xconnect 10.0.0.27 4 encapsulation mpls 
!
interface FastEthernet1/1
 ip address 10.4.1.1 255.255.255.0
 mpls traffic-eng tunnels
 ip rsvp bandwidth 10000 10000
!
router ospf 1
 network 10.0.0.0 0.255.255.255 area 0
 mpls traffic-eng router-id Loopback1
 mpls traffic-eng area 0
!
ip explicit-path name xxxx-1 enable
 next-address 10.4.1.2
 next-address 10.1.0.10
                                                      
 
	 
                                                      

                                                      

                                                      

                                                      Example Configuring per-Subinterface MTU for Ethernet over MPLS
                                                      

                                                       
		
                                                       The figure below shows a configuration that enables matching MTU values between VC endpoints. 
		
                                                      
 
		
                                                       As shown in the figure below, PE1 is configured in xconnect subinterface configuration mode with an MTU value of 1500 bytes in order to establish an end-to-end VC with PE2, which also has an MTU value of 1500 bytes. If PE1 was not set with an MTU value of 1500 bytes, in xconnect subinterface configuration mode, the subinterface would inherit the MTU value of 2000 bytes set on the interface. This would cause a mismatch in MTU values between the VC endpoints, and the VC would not come up. 
		
                                                      
 
		
                                                      Figure 3. Configuring MTU Values in xconnect Subinterface Configuration Mode

                                                      
 
		
                                                       The following examples show the router configurations in the figure above: 
		
                                                      
 
	 
                                                      

                                                      CE1 Configuration
                                                       
		 
		
                                                      interface gigabitethernet0/0
 mtu 1500
 no ip address
!
interface gigabitethernet0/0.1
 encapsulation dot1Q 100
 ip address 10.181.182.1 255.255.255.0
                                                      
 
	 
                                                      

                                                      PE1 Configuration
                                                       
		 
		
                                                      interface gigabitethernet0/0
 mtu 2000
 no ip address
!
interface gigabitethernet0/0.1
 encapsulation dot1Q 100
 xconnect 10.1.1.152 100 encapsulation mpls
  mtu 1500
!
interface gigabitethernet0/0.2
 encapsulation dot1Q 200
 ip address 10.151.100.1 255.255.255.0
 mpls ip
                                                      
 
	 
                                                      

                                                      PE2 Configuration
                                                       
		 
		
                                                      interface gigabitethernet1/0
 mtu 2000
 no ip address
!
interface gigabitethernet1/0.2
 encapsulation dot1Q 200
 ip address 10.100.152.2 255.255.255.0
 mpls ip
!
interface fastethernet0/0
 no ip address
!
interface fastethernet0/0.1
 description default MTU of 1500 for FastEthernet
 encapsulation dot1Q 100
 xconnect 10.1.1.151 100 encapsulation mpls
                                                      
 
	 
                                                      

                                                      CE2 Configuration
                                                       
		 
		
                                                      interface fastethernet0/0
 no ip address
interface fastethernet0/0.1
 encapsulation dot1Q 100
 ip address 10.181.182.2 255.255.255.0

                                                      
 
		
                                                       The 
		  show 
			 mpls 
			 l2transport 
			 bindingcommand, issued from router PE1, shows a matching MTU value of 1500 bytes on both the local and remote routers: 
		
                                                      
 
		
                                                      Router# show mpls l2transport binding 
Destination Address: 10.1.1.152,  VC ID: 100
    Local Label: 100
        Cbit: 1,    VC Type: Ethernet,    GroupID: 0
        MTU: 1500,   Interface Desc: n/a
        VCCV: CC Type: CW [1], RA [2]
              CV Type: LSPV [2]
    Remote Label: 202
        Cbit: 1,    VC Type: Ethernet,    GroupID: 0
        MTU: 1500,   Interface Desc: n/a
        VCCV: CC Type: RA [2]
              CV Type: LSPV [2]
                                                      
 
		
                                                       
		
                                                      
 
		
                                                      Router# show mpls l2transport vc detail
Local interface: Gi0/0.1 up, line protocol up, Eth VLAN 100 up
  Destination address: 10.1.1.152, VC ID: 100, VC status: up
    Output interface: Gi0/0.2, imposed label stack {202}
    Preferred path: not configured  
    Default path: active
    Next hop: 10.151.152.2
  Create time: 1d11h, last status change time: 1d11h
  Signaling protocol: LDP, peer 10.1.1.152:0 up
    Targeted Hello: 10.1.1.151(LDP Id) -> 10.1.1.152
    MPLS VC labels: local 100, remote 202 
    Group ID: local 0, remote 0
    MTU: local 1500, remote 1500
    Remote interface description: 
  Sequencing: receive disabled, send disabled
  VC statistics:
    packet totals: receive 41, send 39
    byte totals:   receive 4460, send 5346
    packet drops:  receive 0, send 0
                                                      
 
		
                                                       In the following example, you are specifying an MTU of 1501 in xconnect subinterface configuration mode, and that value is out of range, the router enters the command in subinterface configuration mode, where it is accepted: 
		
                                                      
 
		
                                                      Router# configure terminal
router(config)# interface gigabitethernet0/2.1
router(config-subif)# xconnect 10.10.10.1 100 encapsulation mpls
router(config-subif-xconn)# mtu ?
<64 - 1500> MTU size in bytes
router(config-subif-xconn)# mtu 1501
router(config-subif)# mtu ?
<64 - 17940> MTU size in bytes

                                                      
 
		
                                                       If the MTU value is not accepted in either xconnect subinterface configuration mode or subinterface configuration mode, then the command is rejected, as shown in the following example: 
		
                                                      
 
		
                                                      Router# configure terminal
router(config)# interface gigabitethernet0/2.1
router(config-subif)# xconnect 10.10.10.1 100 encapsulation mpls
router(config-subif-xconn)# mtu ?
<64 - 1500> MTU size in bytes
router(config-subif-xconn)# mtu 63
% Invalid input detected at ^ marker
                                                      
 
	 
                                                      

                                                      

                                                      

                                                      Example  Configuring MTU Values in xconnect Configuration Mode for L2VPN Interworking
                                                      

                                                      
      
                                                      
The following example shows an L2VPN Interworking example. The PE1 router has a serial interface configured with an MTU value of 1492 bytes. The PE2 router uses xconnect configuration mode to set a matching MTU of 1492 bytes, which allows the two routers to form an interworking VC. If the PE2 router did not set the MTU value in xconnect configuration mode, the interface would be set to 
1500 bytes by default and the VC would not come up. 
                                                      

    
                                                      

                                                      PE1 Configuration 
                                                      
      
      
                                                      pseudowire-class atom-ipiw
 encapsulation mpls
 interworking ip 
!
interface Loopback0
 ip address 10.1.1.151 255.255.255.255
!
interface Serial2/0
 mtu 1492 
 no ip address
 encapsulation ppp
 no fair-queue
 serial restart-delay 0
 xconnect 10.1.1.152 123 pw-class atom-ipiw
!
interface Serial4/0
 ip address 10.151.100.1 255.255.255.252
 encapsulation ppp
 mpls ip
 serial restart-delay 0
!
router ospf 1
 log-adjacency-changes
 network 10.1.1.151 0.0.0.0 area 0
 network 10.151.100.0 0.0.0.3 area 0
!
mpls ldp router-id Loopback0
                                                      

    
                                                      

                                                      PE2 Configuration 
                                                      
      
      
                                                      pseudowire-class atom-ipiw
 encapsulation mpls
 interworking ip 
!
interface Loopback0
 ip address 10.1.1.152 255.255.255.255
!
interface Ethernet0/0 
 no ip address
 xconnect 10.1.1.151 123 pw-class atom-ipiw
  mtu 1492 
!
interface Serial4/0
 ip address 10.100.152.2 255.255.255.252
 encapsulation ppp
 mpls ip
 serial restart-delay 0
!
router ospf 1
 log-adjacency-changes
 network 10.1.1.152 0.0.0.0 area 0
 network 10.100.152.0 0.0.0.3 area 0
!
mpls ldp router-id Loopback0

                                                      

      
                                                      
The show mpls l2transport bindingcommand shows that the MTU value for the local and remote routers is 1492 bytes. 
                                                      

    
                                                      

                                                      PE1 Configuration
                                                      
      
      
                                                      Router# show mpls l2transport binding
 
Destination Address: 10.1.1.152,  VC ID: 123
    Local Label: 105
        Cbit: 1,    VC Type: PPP,    GroupID: 0
        MTU: 1492,   Interface Desc: n/a
        VCCV: CC Type: CW [1], RA [2]
              CV Type: LSPV [2]
    Remote Label: 205
        Cbit: 1,    VC Type: Ethernet,    GroupID: 0
        MTU: 1492,   Interface Desc: n/a
        VCCV: CC Type: RA [2]
              CV Type: LSPV [2]
Router# show mpls l2transport vc detail
Local interface: Se2/0 up, line protocol up, PPP up
  MPLS VC type is PPP, interworking type is IP 
  Destination address: 10.1.1.152, VC ID: 123, VC status: up
    Output interface: Se4/0, imposed label stack {1003 205}
    Preferred path: not configured  
    Default path: active
    Next hop: point2point
  Create time: 00:25:29, last status change time: 00:24:54
  Signaling protocol: LDP, peer 10.1.1.152:0 up
    Targeted Hello: 10.1.1.151(LDP Id) -> 10.1.1.152
    Status TLV support (local/remote)   : enabled/supported
      Label/status state machine        : established, LruRru
      Last local dataplane   status rcvd: no fault
      Last local SSS circuit status rcvd: no fault
      Last local SSS circuit status sent: no fault
      Last local  LDP TLV    status sent: no fault
      Last remote LDP TLV    status rcvd: no fault
    MPLS VC labels: local 105, remote 205 
    Group ID: local n/a, remote 0
    MTU: local 1492, remote 1492
    Remote interface description: 
  Sequencing: receive disabled, send disabled
  VC statistics:
    packet totals: receive 30, send 29
    byte totals:   receive 2946, send 3364
    packet drops:  receive 0, send 0
                                                      

    
                                                      

                                                      PE2 Configuration
                                                      
      
      
                                                      Router# show mpls l2transport binding
 
Destination Address: 10.1.1.151,  VC ID: 123
    Local Label: 205
        Cbit: 1,    VC Type: Ethernet,    GroupID: 0
        MTU: 1492,   Interface Desc: n/a
        VCCV: CC Type: RA [2]
              CV Type: LSPV [2]
    Remote Label: 105
        Cbit: 1,    VC Type: Ethernet,    GroupID: 0
        MTU: 1492,   Interface Desc: n/a
        VCCV: CC Type: CW [1], RA [2]
              CV Type: LSPV [2]
Router# show mpls l2transport vc detail
Local interface: Et0/0 up, line protocol up, Ethernet up
  MPLS VC type is Ethernet, interworking type is IP
  Destination address: 10.1.1.151, VC ID: 123, VC status: up
    Output interface: Se4/0, imposed label stack {1002 105}
    Preferred path: not configured  
    Default path: active
    Next hop: point2point
  Create time: 00:25:19, last status change time: 00:25:19
  Signaling protocol: LDP, peer 10.1.1.151:0 up
    Targeted Hello: 10.1.1.152(LDP Id) -> 10.1.1.151
    Status TLV support (local/remote)   : enabled/supported
      Label/status state machine        : established, LruRru
      Last local dataplane   status rcvd: no fault
      Last local SSS circuit status rcvd: no fault
      Last local SSS circuit status sent: no fault
      Last local  LDP TLV    status sent: no fault
      Last remote LDP TLV    status rcvd: no fault
    MPLS VC labels: local 205, remote 105 
    Group ID: local n/a, remote 0
    MTU: local 1492, remote 1492 
    Remote interface description: 
  Sequencing: receive disabled, send disabled
  VC statistics:
    packet totals: receive 29, send 30
    byte totals:   receive 2900, send 3426
    packet drops:  receive 0, send 0

                                                      

    
                                                      

                                                      

                                                      

                                                      Example  Removing a Pseudowire
                                                      

                                                      
      
                                                      
The following example shows how to remove all xconnects:
                                                      

      
                                                      Router# clear xconnect all
02:13:56: Xconnect[ac:Et1/0.1(Eth VLAN)]: provisioning fwder with fwd_type=1, sss_role=1
02:13:56: Xconnect[mpls:10.1.1.2:1234000]: provisioning fwder with fwd_type=2, sss_role=2
02:13:56: Xconnect[ac:Et1/0.2(Eth VLAN)]: provisioning fwder with fwd_type=1, sss_role=2
02:13:56: Xconnect[mpls:10.1.1.2:1234001]: provisioning fwder with fwd_type=2, sss_role=1
02:13:56: Xconnect[ac:Et1/0.3(Eth VLAN)]: provisioning fwder with fwd_type=1, sss_role=1
02:13:56: Xconnect[mpls:10.1.2.2:1234002]: provisioning fwder with fwd_type=2, sss_role=2
02:13:56: Xconnect[ac:Et1/0.4(Eth VLAN)]: provisioning fwder with fwd_type=1, sss_role=2
02:13:56: Xconnect[mpls:10.1.2.2:1234003]: provisioning fwder with fwd_type=2, sss_role=1
02:13:56: MPLS peer 10.1.1.2 vcid 1234000, VC DOWN, VC state DOWN
02:13:56: MPLS peer 10.1.1.2 vcid 1234001, VC DOWN, VC state DOWN
02:13:56: MPLS peer 10.1.2.2 vcid 1234002, VC DOWN, VC state DOWN
02:13:56: MPLS peer 10.1.2.2 vcid 1234003, VC DOWN, VC state DOWN
02:13:56: XC AUTH [Et1/0.1, 1001]: Event: start xconnect authorization, state changed from IDLE to AUTHORIZING
02:13:56: XC AUTH [Et1/0.1, 1001]: Event: found xconnect authorization, state changed from AUTHORIZING to DONE
02:13:56: XC AUTH [Et1/0.3, 1003]: Event: start xconnect authorization, state changed from IDLE to AUTHORIZING
02:13:56: XC AUTH [Et1/0.3, 1003]: Event: found xconnect authorization, state changed from AUTHORIZING to DONE
02:13:56: XC AUTH [10.1.1.2, 1234001]: Event: start xconnect authorization, state changed from IDLE to AUTHORIZING
02:13:56: XC AUTH [10.1.1.2, 1234001]: Event: found xconnect authorization, state changed from AUTHORIZING to DONE
02:13:56: XC AUTH [10.1.2.2, 1234003]: Event: start xconnect authorization, state changed from IDLE to AUTHORIZING
02:13:56: XC AUTH [10.1.2.2, 1234003]: Event: found xconnect authorization, state changed from AUTHORIZING to DONE
02:13:56: XC AUTH [Et1/0.1, 1001]: Event: free xconnect authorization request, state changed from DONE to END
02:13:56: XC AUTH [Et1/0.3, 1003]: Event: free xconnect authorization request, state changed from DONE to END
02:13:56: XC AUTH [10.1.1.2, 1234001]: Event: free xconnect authorization request, state changed from DONE to END
02:13:56: XC AUTH [10.1.2.2, 1234003]: Event: free xconnect authorization request, state changed from DONE to END
02:13:56: MPLS peer 10.1.1.2 vcid 1234001, VC UP, VC state UP
02:13:56: MPLS peer 10.1.2.2 vcid 1234003, VC UP, VC state UP
02:13:56: MPLS peer 10.1.1.2 vcid 1234000, VC UP, VC state UP
02:13:56: MPLS peer 10.1.2.2 vcid 1234002, VC UP, VC state UP

                                                      

      
                                                      
The following example shows how to remove all the xconnects associated with peer router 10.1.1.2:
                                                      

      
                                                      Router# clear xconnect peer 10.1.1.2 all
02:14:08: Xconnect[ac:Et1/0.1(Eth VLAN)]: provisioning fwder with fwd_type=1, sss_role=1
02:14:08: Xconnect[mpls:10.1.1.2:1234000]: provisioning fwder with fwd_type=2, sss_role=2
02:14:08: Xconnect[ac:Et1/0.2(Eth VLAN)]: provisioning fwder with fwd_type=1, sss_role=2
02:14:08: Xconnect[mpls:10.1.1.2:1234001]: provisioning fwder with fwd_type=2, sss_role=1
02:14:08: MPLS peer 10.1.1.2 vcid 1234000, VC DOWN, VC state DOWN
02:14:08: MPLS peer 10.1.1.2 vcid 1234001, VC DOWN, VC state DOWN
02:14:08: XC AUTH [Et1/0.1, 1001]: Event: start xconnect authorization, state changed from IDLE to AUTHORIZING
02:14:08: XC AUTH [Et1/0.1, 1001]: Event: found xconnect authorization, state changed from AUTHORIZING to DONE
02:14:08: XC AUTH [10.1.1.2, 1234001]: Event: start xconnect authorization, state changed from IDLE to AUTHORIZING
02:14:08: XC AUTH [10.1.1.2, 1234001]: Event: found xconnect authorization, state changed from AUTHORIZING to DONE
02:14:08: XC AUTH [Et1/0.1, 1001]: Event: free xconnect authorization request, state changed from DONE to END
02:14:08: XC AUTH [10.1.1.2, 1234001]: Event: free xconnect authorization request, state changed from DONE to END
02:14:08: MPLS peer 10.1.1.2 vcid 1234001, VC UP, VC state UP
02:14:08: MPLS peer 10.1.1.2 vcid 1234000, VC UP, VC state UP

                                                      

      
                                                      
The following example shows how to remove the xconnects associated with peer router 10.1.1.2 and VC ID 1234001:
                                                      

      
                                                      Router# clear xconnect peer 10.1.1.2 vcid 1234001
02:14:23: Xconnect[ac:Et1/0.2(Eth VLAN)]: provisioning fwder with fwd_type=1, sss_role=1
02:14:23: Xconnect[mpls:10.1.1.2:1234001]: provisioning fwder with fwd_type=2, sss_role=2
02:14:23: MPLS peer 10.1.1.2 vcid 1234001, VC DOWN, VC state DOWN
02:14:23: XC AUTH [Et1/0.2, 1002]: Event: start xconnect authorization, state changed from IDLE to AUTHORIZING
02:14:23: XC AUTH [Et1/0.2, 1002]: Event: found xconnect authorization, state changed from AUTHORIZING to DONE
02:14:23: XC AUTH [Et1/0.2, 1002]: Event: free xconnect authorization request, state changed from DONE to END
02:14:23: MPLS peer 10.1.1.2 vcid 1234001, VC UP, VC state UP
                                                      

      
                                                      
The following example shows how to remove the xconnects associated with interface Ethernet 1/0.1:
                                                      

      
                                                      Router# clear xconnect interface eth1/0.1
 
02:14:48: Xconnect[ac:Et1/0.1(Eth VLAN)]: provisioning fwder with fwd_type=1, sss_role=2
02:14:48: Xconnect[mpls:10.1.1.2:1234000]: provisioning fwder with fwd_type=2, sss_role=1
02:14:48: MPLS peer 10.1.1.2 vcid 1234000, VC DOWN, VC state DOWN
02:14:48: XC AUTH [10.1.1.2, 1234000]: Event: start xconnect authorization, state changed from IDLE to AUTHORIZING
02:14:48: XC AUTH [10.1.1.2, 1234000]: Event: found xconnect authorization, state changed from AUTHORIZING to DONE
02:14:48: XC AUTH [10.1.1.2, 1234000]: Event: free xconnect authorization request, state changed from DONE to END
                                                      

    
                                                      

                                                      

                                                      

                                                      

                                                      Additional References
                                                      

                                                       
	 
                                                      

                                                      Related Documents
                                                       
		 
		

                                                       
					 
                                                       Related Topic
					 
                                                      
 
				                                                        		
 
					 
                                                       Document Title
					 
                                                      
 
				                                                        		

                                                      
                                                      

                                                       
					 
                                                       Cisco IOS commands
					 
                                                      
 
				                                                        		
 
					 
                                                       
						Cisco IOS Master Commands List, All Releases 
					 
                                                      
 
				                                                        		

                                                      

                                                       
					 
                                                       MPLS commands
					 
                                                      
 
				                                                        		
 
					 
                                                      Cisco IOS Multiprotocol Label Switching Command Reference 
						 
					 
                                                      
 
				                                                        		

                                                      

                                                       
					 
                                                       Any Transport over MPLS
					 
                                                      
 
				                                                        		
 
					 
                                                       “Overview” section of 
						Cisco Any Transport over MPLS
					 
                                                      
 
				                                                        		

                                                      

                                                       
					 
                                                       Any Transport over MPLS for the Cisco 10000 series router 
					 
                                                      
 
				                                                        		
 
					 
                                                       
						Cisco 10000 Series Router Broadband Aggregation, Leased-Line, and MPLS Configuration Guide 
					 
                                                      
 
				                                                        		

                                                      

                                                       
					 
                                                       Layer 2 Tunnel Protocol Version 3 (L2TPv3)
					 
                                                      
 
				                                                        		
 
					 
                                                       Layer 2 Tunnel Protocol Version 3 (L2TPv3) 
					 
                                                      
 
				                                                        		

                                                      

                                                       
					 
                                                       L2VPN interworking
					 
                                                      
 
				                                                        		
 
					 
                                                       L2VPN Interworking 
					 
                                                      
 
				                                                        		

                                                      
                                                      

                                                      

                                                      
 
	 
                                                      

                                                      Standards
                                                       
		 
		

                                                       
					 
                                                       Standard
					 
                                                      
 
				                                                        		
 
					 
                                                       Title
					 
                                                      
 
				                                                        		

                                                      
                                                      

                                                       
					 
                                                       draft-martini-l2circuit-trans-mpls-08.txt
					 
                                                      
 
				                                                        		
 
					 
                                                       
						Transport of Layer 2 Frames Over MPLS 
					 
                                                      
 
				                                                        		

                                                      

                                                       
					 
                                                       draft-martini-l2circuit-encap-mpls-04.txt
					 
                                                      
 
				                                                        		
 
					 
                                                       
						Encapsulation Methods for Transport of Layer 2 Frames Over MPLS 
					 
                                                      
 
				                                                        		

                                                      
                                                      

                                                      

                                                      
 
	 
                                                      

                                                      MIBs
                                                       
		 
		

                                                       
					 
                                                       MIB 
					 
                                                      
 
				                                                        		
 
					 
                                                       MIBs Link
					 
                                                      
 
				                                                        		

                                                      
                                                      

                                                       
					 
                                                       ATM AAL5 over MPLS and ATM Cell Relay over MPLS:
					 
                                                      
 
					 
                                                      •  MPLS LDP MIB (MPLS-LDP-MIB.my) 
						

                                                        • 

                                                      •  ATM MIB (ATM-MIB.my)
						

                                                        • 

                                                      •  CISCO AAL5 MIB (CISCO-AAL5-MIB.my)
						

                                                        • 

                                                      •  Cisco Enterprise ATM Extension MIB (CISCO-ATM-EXT-MIB.my)
						

                                                        • 

                                                      •  Supplemental ATM Management Objects (CISCO-IETF-ATM2-PVCTRAP-MIB.my)
						

                                                        • 

                                                      •  Interfaces MIB (IF-MIB.my)
						

                                                        • 

                                                      
 
					 
                                                       Ethernet over MPLS: 
					 
                                                      
 
					 
                                                      •  CISCO-ETHERLIKE-CAPABILITIES.my 
						

                                                        • 

                                                      •  Ethernet MIB (ETHERLIKE-MIB.my) 
						

                                                        • 

                                                      •  Interfaces MIB (IF-MIB.my)
						

                                                        • 

                                                      •  MPLS LDP MIB (MPLS-LDP-MIB.my) 
						

                                                        • 

                                                      
 
					 
                                                       Frame Relay over MPLS:
					 
                                                      
 
					 
                                                      •  Cisco Frame Relay MIB (CISCO-FRAME-RELAY-MIB.my) 
						

                                                        • 

                                                      •  Interfaces MIB (IF-MIB.my)
						

                                                        • 

                                                      •  MPLS LDP MIB (MPLS-LDP-MIB.my) 
						

                                                        • 

                                                      
 
					 
                                                       HDLC and PPP over MPLS:
					 
                                                      
 
					 
                                                      •  MPLS LDP MIB (MPLS-LDP-MIB.my) 
						

                                                        • 

                                                      •  Interfaces MIB (IF-MIB.my)
						

                                                        • 

                                                      
 
				                                                        		
 
					 
                                                       To locate and download MIBs for selected platforms, Cisco software releases, and feature sets, use Cisco MIB Locator found at the following URL:
					 
                                                      
 
					 
                                                       
						http:/​/​www.cisco.com/​go/​mibs 
					 
                                                      
 
				                                                        		

                                                      
                                                      

                                                      

                                                      
 
	 
                                                      

                                                      RFCs
                                                       
		 
		

                                                       
					 
                                                       RFC 
					 
                                                      
 
				                                                        		
 
					 
                                                       Title
					 
                                                      
 
				                                                        		

                                                      
                                                      

                                                       
					 
                                                       RFC 3032
					 
                                                      
 
				                                                        		
 
					 
                                                       
						MPLS Label Stack Encoding 
					 
                                                      
 
				                                                        		

                                                      

                                                       
					 
                                                       RFC 3036
					 
                                                      
 
				                                                        		
 
					 
                                                       
						LDP Specification 
					 
                                                      
 
				                                                        		

                                                      
                                                      

                                                      

                                                      
 
	 
                                                      

                                                      Technical Assistance
                                                       
		 
		

                                                       
					 
                                                       Description
					 
                                                      
 
				                                                        		
 
					 
                                                       Link
					 
                                                      
 
				                                                        		

                                                      
                                                      

                                                       
					 
                                                       The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. 
					 
                                                      
 
				                                                        		
 
					 
                                                       
						http:/​/​www.cisco.com/​cisco/​web/​support/​index.html 
					 
                                                      
 
				                                                        		

                                                      
                                                      

                                                      

                                                      
 
	 
                                                      

                                                      

                                                      

                                                      Feature Information for Any Transport over MPLS
                                                      

                                                       
		
                                                      The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature. 
		
                                                      
 
		
                                                      Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to 
		  www.cisco.com/​go/​cfn. An account on Cisco.com is not required. 
		
                                                      
 
	 
                                                      

                                                       
		

                                                      Table 9 Feature Information for Any Transport over MPLS 
                                                       
				  
                                                       Feature Name 
				  
                                                      
 
				                                                      		
 
				  
                                                       Releases 
				  
                                                      
 
				                                                      		
 
				  
                                                       Feature Information 
				  
                                                      
 
				                                                      		

                                                      
                                                      

                                                       
				  
                                                       Any Transport over MPLS 
				  
                                                      
 
				                                                      		
 
				  
                                                       12.0(10)ST 12.0(21)ST 12.0(22)S 12.0(23)S 12.0(25)S 12.0(26)S 12.0(27)S 12.0(29)S 12.0(30)S 12.0(31)S 12.0(32)S 12.1(8a)E 12.2(14)S 12.2(15)T 12.2(28)SB 12.2(33)SRB 12.2(33)SXH 12.2(33)SRC 12.2(33)SRD 12.2(1)SRE 12.4(11)T 15.0(1)S 15.1(3)S 
				  
                                                      
 
				                                                      		
 
				  
                                                       In Cisco IOS Release 12.0(10)ST, Any Transport over MPLS: ATM AAL5 over MPLS was introduced on the Cisco 12000 series routers. 
				  
                                                      
 
				  
                                                       In Cisco IOS Release 12.1(8a)E, Ethernet over MPLS was introduced on the Cisco 7600 series Internet router. 
				  
                                                      
 
				  
                                                       In Cisco IOS Release 12.0(21)ST, Any Transport over MPLS: Ethernet over MPLS was introduced on the Cisco 12000 series routers. ATM AAL5 over MPLS was updated. 
				  
                                                      
 
				  
                                                       In Cisco IOS Release 12.0(22)S, Ethernet over MPLS was integrated into this release. Support for the Cisco 10720 Internet router was added. ATM AAL5 over MPLS was integrated into this release for the Cisco 12000 series routers. 
				  
                                                      
 
				  
                                                       In Cisco IOS Release 12.0(23)S, the following new features were introduced and support was added for them on the Cisco 7200 and 7500 series routers: 
				  
                                                      
 
				  
                                                      •  ATM Cell Relay over MPLS (single cell relay, VC mode) 
					 

                                                        • 

                                                      •  Frame Relay over MPLS 
					 

                                                        • 

                                                      •  HDLC over MPLS 
					 

                                                        • 

                                                      •  PPP over MPLS 
					 

                                                        • 

                                                      
 
				  
                                                       Cisco IOS Release 12.0(23)S also added support on the Cisco 12000, 7200, and 7500 series routers for the following features: 
				  
                                                      
 
				  
                                                      •  ATM AAL5 over MPLS 
					 

                                                        • 

                                                      •  Ethernet over MPLS (VLAN mode) 
					 

                                                        • 

                                                      
 
				  
                                                       The AToM features were integrated into Cisco IOS Release 12.2(14)S. 
				  
                                                      
 
				  
                                                       The AToM features were integrated into Cisco IOS Release 12.2(15)T. 
				  
                                                      
 
				  
                                                       In Cisco IOS Release 12.0(25)S, the following new features were introduced: 
				  
                                                      
 
				  
                                                      •  New commands for configuring AToM 
					 

                                                        • 

                                                      •  Ethernet over MPLS: port mode 
					 

                                                        • 

                                                      •  ATM Cell Relay over MPLS: packed cell relay 
					 

                                                        • 

                                                      •  ATM Cell Relay over MPLS: VP mode 
					 

                                                        • 

                                                      •  ATM Cell Relay over MPLS: port mode 
					 

                                                        • 

                                                      •  Distributed Cisco Express Forwarding mode for Frame Relay, PPP, and HDLC over MPLS 
					 

                                                        • 

                                                      •  Fast reroute with AToM 
					 

                                                        • 

                                                      •  Tunnel selection 
					 

                                                        • 

                                                      •  Traffic policing 
					 

                                                        • 

                                                      •  QoS support 
					 

                                                        • 

                                                      
 
				                                                      		

                                                      

                                                       
				
                                                      
                                                      		

                                                       
				
                                                      
                                                      		
 
				  
                                                       In Cisco IOS Release 12.0(26)S, the following new features were introduced: 
				  
                                                      
 
				  
                                                      •  Support for connecting disparate attachment circuits. See L2VPN Interworking for more information. 
					 

                                                        • 

                                                      •  QoS functionality with AToM for the Cisco 7200 series routers. 
					 

                                                        • 

                                                      
 
				  
                                                       Support for FECN and BECN marking with Frame Relay over MPLS. (See BECN and FECN Marking for Frame Relay over MPLS for more information.) 
				  
                                                      
 
				  
                                                       In Cisco IOS Release 12.0(27)S, the following new features were introduced: 
				  
                                                      
 
				  
                                                      •  ATM Cell Relay over MPLS: Packed Cell Relay for VC, PVP, and port mode for the Cisco 12000 series router. 
					 

                                                        • 

                                                      •  Support for ATM over MPLS on the Cisco 12000 series 4-port OC-12X/STM-4 ATM ISE line card. 
					 

                                                        • 

                                                      
 
				  
                                                       This feature was integrated into Cisco IOS Release 12.2(25)S for the Cisco 7200 and 7500 series routers. 
				  
                                                      
 
				  
                                                       In Cisco IOS Release 12.0(29)S, the “Any Transport over MPLS Sequencing Support” feature was added for the Cisco 7200 and 7500 series routers. 
				  
                                                      
 
				  
                                                       In Cisco IOS Release 12.0(30)S, the following new features were introduced: 
				  
                                                      
 
				  
                                                       In Cisco IOS Release 12.0(31)S, the Cisco 12000 series router introduced the following enhancements: 
				  
                                                      
 
				  
                                                      •  AToM VC Independence--With this enhancement, fast reroute is accomplished in less than 50 milliseconds, regardless of the number of VCs configured. 
					 

                                                        • 

                                                      •  Support for ISE line cards on the 2.5G ISE SPA Interface Processor (SIP). 
					 

                                                        • 

                                                      
 
				  
                                                       In Cisco IOS Release 12.0(32)S, the Cisco 12000 series router added engine 5 line card support for the following transport types: 
				  
                                                      
 
				  
                                                      •  Ethernet over MPLS 
					 

                                                        • 

                                                      •  Frame Relay over MPLS 
					 

                                                        • 

                                                      •  HDLC over MPLS 
					 

                                                        • 

                                                      •  PPP over MPLS 
					 

                                                        • 

                                                      
 
				                                                      		

                                                      

                                                       
				
                                                      
                                                      		

                                                       
				
                                                      
                                                      		
 
				  
                                                       This feature was integrated into Cisco IOS Release 12.2(28)SB on the Cisco 10000 series routers. Platform-specific configuration information is contained in the “Configuring Any Transport over MPLS” section of the 
					  Cisco 10000 Series Router Broadband Aggregation, Leased-Line, and MPLS Configuration Guide. 
				  
                                                      
 
				  
                                                       Any Transport over MPLS was integrated into Cisco IOS Release 12.4(11)T with support for the following features: 
				  
                                                      
 
				  
                                                      •  Any Transport over MPLS: Ethernet over MPLS: Port Mode 
					 

                                                        • 

                                                      •  Any Transport over MPLS: Ethernet over MPLS: VLAN Mode 
					 

                                                        • 

                                                      •  Any Transport over MPLS: Ethernet over MPLS: VLAN ID Rewrite 
					 

                                                        • 

                                                      •  Any Transport over MPLS: Frame Relay over MPLS 
					 

                                                        • 

                                                      •  Any Transport over MPLS: AAL5 over MPLS 
					 

                                                        • 

                                                      •  Any Transport over MPLS: ATM OAM Emulation 
					 

                                                        • 

                                                      
 
				  
                                                       This feature was integrated into Cisco IOS Release 12.2(33)SRB to support the following features on the Cisco 7600 router: 
				  
                                                      
 
				  
                                                      •  Any Transport over MPLS: Frame Relay over MPLS 
					 

                                                        • 

                                                      •  Any Transport over MPLS: ATM Cell Relay over MPLS: Packed Cell Relay 
					 

                                                        • 

                                                      •  Any Transport over MPLS: Ethernet over MPLS 
					 

                                                        • 

                                                      •  AToM Static Pseudowire Provisioning 
					 

                                                        • 

                                                      
 
				  
                                                       Platform-specific configuration information is contained in the following documents: 
				  
                                                      
 
				  
 
				                                                      		

                                                      

                                                       
				
                                                      
                                                      		

                                                       
				
                                                      
                                                      		
 
				  
                                                       This feature was integrated into Cisco IOS Release 12.2(33)SXH and supports the following features: 
				  
                                                      
 
				  
                                                      •  Any Transport over MPLS: Ethernet over MPLS: Port Mode 
					 

                                                        • 

                                                      •  Any Transport over MPLS: AAL5 over MPLS 
					 

                                                        • 

                                                      •  Any Transport over MPLS: ATM OAM Emulation 
					 

                                                        • 

                                                      •  Any Transport over MPLS: Single Cell Relay--VC Mode 
					 

                                                        • 

                                                      •  Any Transport over MPLS: ATM Cell Relay over MPLS--VP Mode 
					 

                                                        • 

                                                      •  Any Transport over MPLS: Packed Cell Relay--VC/VP Mode 
					 

                                                        • 

                                                      •  Any Transport over MPLS: Ethernet over MPLS 
					 

                                                        • 

                                                      •  ATM Port Mode Packed Cell Relay over AToM 
					 

                                                        • 

                                                      •  AToM Tunnel Selection 
					 

                                                        • 

                                                      
 
				  
                                                       The following features were integrated into Cisco IOS Release 12.2(33)SRC: 
				  
                                                      
 
				  
                                                      •  AToM Tunnel Selection for the Cisco 7200 and Cisco 7300 routers 
					 

                                                        • 

                                                      •  Per-Subinterface MTU for Ethernet over MPLS (EoMPLS) 
					 

                                                        • 

                                                      
 
				  
                                                       In Cisco IOS Release 12.2(33)SRD, support for ATM Cell Relay over MPLS in port mode on Cisco 7600 series routers was added. 
				  
                                                      
 
				  
                                                       Per Subinterface MTU for Ethernet over MPLS (EoMPLS) was integrated into Cisco IOS Release 15.1(3)S. 
				  
                                                      
 
				                                                      		

                                                      

                                                       
				  
                                                       MPLS L2VPN Clear Xconnect Command 
				  
                                                      
 
				                                                      		
 
				  
                                                       12.2(1)SRE 
				  
                                                      
 
				  
                                                       15.0(1)S 
				  
                                                      
 
				                                                      		
 
				  
                                                       These features are supported on Cisco 7600 routers in Cisco IOS Release 12.2(1)SRE and Cisco IOS Release 15.0(1)S. 
				  
                                                      
 
				  
                                                       These features enable you to: 
				  
                                                      
 
				  
                                                      •  Reset a VC associated with an interface, a peer address, or on all the configured xconnect circuit attachments 
					 

                                                        • 

                                                      •  Set the control word on dynamic pseudowires. 
					 

                                                        • 

                                                      •  Enable ATM cell packing for static pseudowires. 
					 

                                                        • 

                                                      
 
				  
                                                       The following commands were introduced or modified by these features: 
					 cell-packing, 
					 clear 
						xconnect, 
					 control-word, 
					 encapsulation 
						(Any 
						Transport 
						over 
						MPLS), 
						oam-ac 
						emulation-enable. 
				  
                                                      
 
				                                                      		

                                                      

                                                       
				  
                                                       MPLS MTU Command for GRE Tunnels 
				  
                                                      
 
				                                                      		
 
				  
                                                       15.1(1)T 15.1(2)S 
				  
                                                      
 
				                                                      		
 
				  
                                                       This feature allows you to reset the MPLS MTU size in GRE tunnels from default to the maximum. 
				  
                                                      
 
				  
                                                       The 
					 maximum keyword was replaced with the 
					 max keyword. 
				  
                                                      
 
				  
                                                       The following command was modified by this feature: 
					 mpls 
						mtu. 
				  
                                                      
 
				                                                      		

                                                      

                                                      
				  
                                                      ATM Port mode Packed Cell Relay over MPLS
				  
                                                      

				                                                      		

				  
                                                       15.2(1)S 
				  
                                                      

				                                                      		

				  
                                                       This feature was integrated into Cisco IOS Release 12.2(1)S.
				  
                                                      

				                                                      		

                                                      

                                                      
				  
                                                      Any Transport over MPLS (AToM): ATM Cell Relay over MPLS: Packed Cell Relay
				  
                                                      

				                                                      		

				  
                                                       15.2(1)S 
				  
                                                      

				                                                      		

				  
                                                       This feature was integrated into Cisco IOS Release 12.2(1)S.
				  
                                                      

				                                                      		

                                                      
                                                      

                                                      

                                                      
 
	 
                                                      

                                                      

                                                      

                                                      


                                                      















Any Transport over MPLS

                              

                                                      


                                                      Contents
                                                      Any Transport over MPLS
                                                      

                                                       
	 
                                                      

                                                       This document describes the Any Transport over MPLS (AToM) feature, which provides the following capabilities:
	 
                                                      

                                                      •  Transport data link layer (Layer2) packets over a Multiprotocol Label Switching (MPLS) backbone.
		

                                                        • 

                                                      •  Enable service providers to connect customer sites with existing Layer 2 networks by using a single, integrated, packet-based network infrastructure--a Cisco MPLS network. Instead of using separate networks with network management environments, service providers can deliver Layer 2 connections over an MPLS backbone.
		

                                                        • 

                                                      •  Provide a common framework to encapsulate and transport supported Layer 2 traffic types over an MPLS network core.
		

                                                        • 

                                                      

                                                       AToM supports the following like-to-like transport types:
	 
                                                      

                                                      •  ATM Adaptation Layer Type-5 (AAL5) over MPLS
		

                                                        • 

                                                      •  ATM Cell Relay over MPLS
		

                                                        • 

                                                      •  Ethernet over MPLS (VLAN and port modes)
		

                                                        • 

                                                      •  Frame Relay over MPLS
		

                                                        • 

                                                      •  PPP over MPLS 
		

                                                        • 

                                                      •  High-Level Data Link Control (HDLC) over MPLS
		

                                                        • 

                                                      

                                                      

                                                      Finding Feature Information
                                                      

                                                       Your software release may not support all the features documented in this module. For the latest caveats and feature information, see 
		Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module. 
	 
                                                      

                                                      Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to 
		www.cisco.com/​go/​cfn. An account on Cisco.com is not required. 
	 
                                                      

                                                      

                                                      

                                                      Prerequisites for Any Transport over MPLS
                                                      

                                                       Before configuring AToM, ensure that the network is configured as follows:
	 
                                                      


                                                      

                                                      

                                                      Restrictions for Any Transport over MPLS
                                                      

                                                      General Restrictions
                                                       
		 
		
                                                       The following general restrictions pertain to all transport types under AToM: 
		
                                                      
 
		
                                                      •  Address format: Configure the Label Distribution Protocol (LDP) router ID on all PE routers to be a loopback address with a /32 mask. Otherwise, some configurations might not function properly. 
		  

                                                        • 

                                                      •  Layer 2 virtual private networks (L2VPN) features (AToM and Layer 2 Tunnel Protocol Version 3 (L2TPv3)) are not supported on an ATM interface.
		  

                                                        • 

                                                      •  Distributed Cisco Express Forwarding is the only forwarding model supported on the Cisco 12000 series routers and is enabled by default. Disabling distributed Cisco Express Forwarding on the Cisco 12000 series routers disables forwarding.
		  

                                                        • 

                                                      •  Distributed Cisco Express Forwarding mode is supported on the Cisco 7500 series routers for Frame Relay, HDLC, and PPP. In distributed Cisco Express Forwarding mode, the switching process occurs on the Versatile Interface Processors (VIPs) that support switching. When distributed Cisco Express Forwarding is enabled, VIP port adapters maintain identical copies of the Forwarding Information Base (FIB) and adjacency tables. The port adapters perform the express forwarding between port adapters, relieving the Route Switch Processor (RSP) from performing the switching. Distributed Cisco Express Forwarding uses an interprocess communications (IPC) mechanism to ensure synchronization of FIBs and adjacency tables between the RSP and port adapters.
		  

                                                        • 

                                                      •  To convert an interface with L2TPv3 xconnect to AToM xconnect, remove the L2TPv3 configuration from the interface and then configure AToM. Some features may not work if AToM is configured when L2TPv3 configuration is not removed properly.
		  

                                                        • 

                                                      
 
	 
                                                      

                                                      ATM Cell Relay over MPLS Restrictions
                                                       
		 
		
                                                       The following restrictions pertain to ATM Cell Relay over MPLS:
		
                                                      
 
		
                                                      •  For ATM Cell Relay over MPLS,if you have TE tunnels running between the PE routers, you must enable LDP on the tunnel interfaces. 
		  

                                                        • 

                                                      •  Configuring ATM Relay over MPLS with the Cisco 12000 Series Router engine 2 8-port OC-3 STM-1 ATM line card: In Cisco IOS Release 12.0(25)S, there were special instructions for configuring ATM cell relay on the Cisco 12000 series router with an engine 2 8-port OC-3 STM-1 ATM line card. The special configuration instructions do not apply to releases later than Cisco IOS Release 12.0(25)S and you do not need to use the 
			 atm 
				mode 
				cell-relay command. 
		  

                                                        • 

                                                      
 
		
                                                       In Cisco IOS Release 12.0(25)S, when you configured the Cisco 12000 series 8-port OC-3 STM-1 ATM line card for ATM Cell Relay over MPLS, two ports were reserved. In releases later than Cisco IOS Release 12.0(25)S, only one port is reserved. 
		
                                                      
 
		
                                                       In addition, in Cisco IOS Release 12.0(25)S, if you configured an 8-port OC-3 STM-1 ATM port for ATM Adaptation Layer 5 (AAL5) over MPLS and then configured ATM single cell relay over MPLS on that port, the Virtual Circuits (VCs) and Virtual Paths (VPs) for AAL5 on the port and its corresponding port were removed. Starting in Cisco IOS Release 12.0(26)S, this behavior no longer occurs. ATM AAL5 over MPLS and ATM single cell relay over MPLS are supported on the same port. The Cisco 12000 series 8-port OC-3 STM-1 ATM line cards now support, by default, the ATM single cell relay over MPLS feature in both VP and VC modes and ATM AAL5 over MPLS on the same port.
		
                                                      
 
		
                                                      •  The F4 end-to-end Operation, Administration, and Maintenance (OAM) cells are transparently transported along with the ATM cells. When a permanent virtual path (PVP) or Permanent Virtual Circuit (PVC) is down on one PE router, the label associated with that PVP or PVC is withdrawn. Subsequently, the peer PE router detects the label withdrawal and sends an F4 AIS/RDI signal to its corresponding customer edge (CE) router. The PVP or PVC on the peer PE router remains in the up state.
		  

                                                        • 

                                                      
 
	 
                                                      

                                                      Ethernet over MPLS (EoMPLS) Restrictions
                                                       
		 
		
                                                       The following restrictions pertain to the Ethernet over MPLS feature:
		
                                                      
 
		
                                                      •  Ethernet over MPLS supports VLAN packets that conform to the IEEE 802.1Q standard. The 802.1Q specification establishes a standard method for inserting VLAN membership information into Ethernet frames. The Inter-Switch Link (ISL) protocol is not supported between the PE and CE routers. 
		  

                                                        • 

                                                      •  The AToM control word is supported. However, if the peer PE does not support a control word, the control word is disabled. This negotiation is done by LDP label binding.
		  

                                                        • 

                                                      •  Ethernet packets with hardware-level cyclic redundancy check (CRC) errors, framing errors, and runt packets are discarded on input.
		  

                                                        • 

                                                      •  In Cisco IOS Release 12.2(25)S, the behavior of the 
			 mpls 
				mtu command changed. If the interface MTU is less than 1524 bytes, you can set the maximum MPLS MTU to 24 bytes more than the interface MTU. For example, if the interface MTU is set to 1510 bytes, then you can set the maximum MPLS MTU to 1534 bytes (1510 + 24). 
		  

                                                        • 

                                                      
 
		

                                                      Caution
                                                       
		  
                                                       Although you can set the MPLS MTU to a value greater than the interface MTU, you must set the MPLS MTU to a value less than or equal to the interface MTU to prevent data corruption, dropped packets, and high CPU rates.
		  
                                                      
 
		
                                                      
 
		
                                                       If the interface MTU is greater than or equal to 1524 bytes, then you can set the maximum MPLS MTU as high as the interface MTU. For example, if the interface MTU is set to 1600 bytes, then you can set the MPLS MTU to a maximum of 1600 bytes. If you set the MPLS MTU to a value higher than the interface MTU, traffic is dropped.
		
                                                      
 
		
                                                       For interfaces that do not allow you to configure the interface MTU value and for interfaces where the interface MTU is 1500 bytes, the MPLS MTU range is 64 to 1524 bytes. 
		
                                                      
 
		
                                                       If you upgrade to Cisco IOS Release 12.2(25)S from an earlier release and you have an MPLS MTU setting that does not conform to these guidelines, the command is rejected. See the 
		  Maximum Transmission Unit Guidelines for Estimating Packet Size for more information.
		
                                                      
 
	 
                                                      

                                                      Per-Subinterface MTU for Ethernet over MPLS Restrictions
                                                      
		
		
                                                      
		
                                                      • The following features do not support MTU values in xconnect subinterface configuration mode:
			 
                                                        • Layer 2 Tunnel Protocol Version 3 (L2TPv3)
				
                                                          • 

                                                        • Virtual Private LAN services (VPLS)
				
                                                          • 

                                                        • L2VPN Pseudowire Switching
				
                                                          • 

                                                        

		  
                                                        

                                                        • 

                                                      • The MTU value can be configured in xconnect subinterface configuration mode only on the following interfaces and subinterfaces:
			 
                                                        • Fast Ethernet
				
                                                          • 

                                                        • Gigabit Ethernet
				
                                                          • 

                                                        

		  
                                                        

                                                        • 

                                                      • The router uses an MTU validation process for remote VCs established through LDP, which compares the MTU value configured in xconnect subinterface configuration mode to the MTU value of the remote customer interface. If an MTU value has not been configured in xconnect subinterface configuration mode, then the validation process compares the MTU value of the local customer interface to the MTU value of the remote xconnect, either explicitly configured or inherited from the underlying interface or subinterface.
		  

                                                        • 

                                                      • When you configure the MTU value in xconnect subinterface configuration mode, the specified MTU value is not enforced by the dataplane. The dataplane enforces the MTU values of the interface (port mode) or subinterface (VLAN mode). 
		  

                                                        • 

                                                      • Ensure that the interface MTU is larger than the MTU value configured in xconnect subinterface configuration mode. If the MTU value of the customer-facing subinterface is larger than the MTU value of the core-facing interface, traffic may not be able to travel across the pseudowire.
		  

                                                        • 

                                                      

		
                                                      

	 
                                                      

                                                      Frame Relay over MPLS Restrictions
                                                       
		 
		
                                                       The following restrictions pertain to the Frame Relay over MPLS feature:
		
                                                      
 
		
                                                      •  Frame Relay traffic shaping is not supported with AToM switched VCs. 
		  

                                                        • 

                                                      •  If you configure Frame Relay over MPLS on the Cisco 12000 series router and the core-facing interface is an engine 4 or 4+ line card and the edge-facing interface is an engine 0 or 2 line card, then the BECN, FECN, control word (CW), and DE bit information is stripped from the PVC.
		  

                                                        • 

                                                      
 
	 
                                                      

                                                      

                                                      

                                                      Information About Any Transport over MPLS
                                                      

                                                      

                                                      How AToM Transports Layer 2 Packets
                                                      

                                                      
AToM encapsulates Layer 2 frames at the ingress PE and sends them to a corresponding PE at the other end of a pseudowire, which is a connection between the two PE routers. The egress PE removes the encapsulation and sends out the Layer 2 frame. 
                                                      

                                                      
The successful transmission of the Layer 2 frames between PE routers is due to the configuration of the PE routers. You can set up the connection, called a pseudowire, between the routers and specify the following information on each PE router:
                                                      

                                                      • 
The type of Layer 2 data that will be transported across the pseudowire such as Ethernet, Frame Relay, or ATM

                                                        • 

                                                      • 
The IP address of the loopback interface of the peer PE router, which enables the PE routers to communicate 

                                                        • 

                                                      • 
A unique combination of peer PE IP address and VC ID that identifies the pseudowire

                                                        • 

                                                      

                                                      
The following example shows the basic configuration steps on a PE router that enable the transport of Layer 2 packets. Each transport type has slightly different steps. 
                                                      

                                                      
Step 1 defines the interface or subinterface on the PE router:
                                                      

                                                      Router# interface 
interface-type interface-number

                                                      

                                                      
Step 2 specifies the encapsulation type for the interface, such as dot1q:
                                                      

                                                      Router(config-if)# encapsulation encapsulation-type

                                                      

                                                      
Step 3 does the following:
                                                      

                                                      • 
Makes a connection to the peer PE router by specifying the LDP router ID of the peer PE router. 

                                                        • 

                                                      • 
Specifies a 32-bit unique identifier, called the VC ID, which is shared between the two PE routers. 

                                                        • 

                                                      

                                                      
The combination of the peer router ID and the VC ID must be unique on the router. Two circuits cannot use the same combination of the peer router ID and VC ID. 
                                                      

                                                      • 
Specifies the tunneling method used to encapsulate data in the pseudowire. AToM uses MPLS as the tunneling method. 

                                                        • 

                                                      

                                                      Router(config-if)# xconnect peer-router-id vcid encapsulation mpls

                                                      

                                                      
As an alternative, you can set up a pseudowire class to specify the tunneling method and other characteristics. For more information, see the Configuring the Pseudowire Class.
                                                      

                                                      

                                                      

                                                      AToM Configuration Commands Prior to Cisco IOS Release 12.0(25)S
                                                      

                                                      
In releases of AToM before Cisco IOS 12.0(25)S, the mpls l2 transport routecommand was used to configure AToM circuits.This command has been replaced with the xconnectcommand. 
                                                      

                                                      
No enhancements will be made to the mpls l2transport routecommand. Enhancements will be made to either the xconnectcommand or the pseudowire-classcommand. Therefore, Cisco recommends that you use the xconnect command to configure AToM circuits. 
                                                      

                                                      
Configurations from releases before Cisco IOS 12.0(25)S that use the mpls l2transport routecommand are still supported. 
                                                      

                                                      

                                                      

                                                      Benefits of AToM
                                                      

                                                       The following list explains some of the benefits of enabling Layer 2 packets to be sent in the MPLS network:
	 
                                                      

                                                      •  The AToM product set accommodates many types of Layer 2 packets, including Ethernet and Frame Relay, across multiple Cisco router platforms, such as the Cisco 7200 and Cisco 7500 series routers. This enables the service provider to transport all types of traffic over the backbone and accommodate all types of customers.
		

                                                        • 

                                                      •  AToM adheres to the standards developed for transporting Layer 2 packets over MPLS. (See the "Standards" section for the specific standards that AToM follows.) This benefits the service provider that wants to incorporate industry-standard methodologies in the network. Other Layer 2 solutions are proprietary, which can limit the service provider’s ability to expand the network and can force the service provider to use only one vendor’s equipment.
		

                                                        • 

                                                      •  Upgrading to AToM is transparent to the customer. Because the service provider network is separate from the customer network, the service provider can upgrade to AToM without disruption of service to the customer. The customers assume that they are using a traditional Layer 2 backbone.
		

                                                        • 

                                                      

                                                      

                                                      

                                                      MPLS Traffic Engineering Fast Reroute
                                                      

                                                       AToM can use MPLS traffic engineering (TE) tunnels with fast reroute (FRR) support. AToM VCs can be rerouted around a failed link or node at the same time as MPLS and IP prefixes.
	 
                                                      

                                                       Enabling fast reroute on AToM does not require any special commands; you can use the standard fast reroute (FRR) commands. At the ingress PE, an AToM tunnel is protected by fast reroute when it is routed to an FRR-protected TE tunnel. Both link and node protection are supported for AToM VCs at the ingress PE. For more information on configuring MPLS TE fast reroute, see the following document:
	 
                                                      

                                                       MPLS Traffic Engineering (TE)--Link and Node Protection, with RSVP Hellos Support 
	 
                                                      


                                                      Note
                                                       The AToM VC independence feature was introduced in Cisco IOS Release 12.0(31)S. This feature enables the Cisco 12000 series router to perform fast reroute in fewer than 50 milliseconds, regardless of the number of VCs configured. In previous releases, the fast reroute time depended on the number of VCs inside the protected TE tunnel.
	 
                                                      

                                                      

                                                       For the Cisco 12000 series routers, fast reroute uses three or more labels, depending on where the TE tunnel ends: 
	 
                                                      

                                                      •  If the TE tunnel is from a PE router to a PE router, three labels are used. 
		

                                                        • 

                                                      •  If the TE tunnel is from a PE router to the core router, four labels are used.
		

                                                        • 

                                                      

                                                       Engine 0 ATM line cards support three or more labels, but the performance degrades. Engine 2 Gigabit Ethernet line cards and engine 3 line cards support three or more labels and can work with the fast reroute feature. 
	 
                                                      

                                                       You can issue the 
		debug 
		  mpls 
		  l2transport 
		  fast-reroutecommand to debug fast reroute with AToM. 
	 
                                                      


                                                      Note
                                                       This command does not display output on platforms where AToM fast reroute is implemented in the forwarding code. The command does display output on Cisco 10720 Internet router line cards and Cisco 12000 series line cards. This command does not display output for the Cisco 7500 (both Route Processor (RP) and Versatile Interface Processor (VIP)) series routers, Cisco 7200 series routers, and Cisco 12000 series RP.
	 
                                                      

                                                      

                                                       In the following example, the primary link is disabled, which causes the backup tunnel (Tunnel 1) to become the primary path. In the following example, bolded output shows the status of the tunnel: 
	 
                                                      

                                                      Router# execute-on slot 3 debug mpls l2transport fast-reroute
========= Line Card (Slot 3) =========
AToM fast reroute debugging is on
SLOT 3:Sep 16 17:58:56.346: AToM SMGR: Processing TFIB FRR event for 10.4.0.1
SLOT 3:Sep 16 17:58:56.346: AToM SMGR: Finished processing TFIB FRR event for 10.4.0.1
SLOT 3:Sep 16 17:58:56.346: AToM SMGR: Processing TFIB FRR event for Tunnel41
SLOT 3:Sep 16 17:58:56.346: AToM SMGR: Finished processing TFIB FRR event for Tunnel41
Sep 16 17:58:58.342: %LINK-3-UPDOWN: Interface POS0/0, changed state to down
Sep 16 17:58:58.342: %OSPF-5-ADJCHG: Process 1, Nbr 10.0.0.1 on POS0/0 from FULL to DOWN, Neighbor Down: Interface down or detached
Sep 16 17:58:59.342: %LINEPROTO-5-UPDOWN: Line protocol on Interface POS0/0, changed state to down

                                                      

                                                      

                                                      

                                                      Maximum Transmission Unit Guidelines for Estimating Packet Size
                                                      

                                                       The following calculation helps you determine the size of the packets traveling through the core network. You set the maximum transmission unit (MTU) on the core-facing interfaces of the P and PE routers to accommodate packets of this size. The MTU should be greater than or equal to the total bytes of the items in the following equation:
	 
                                                      

                                                       
		 
		  Core 
		  MTU 
		 >= (Edge MTU + Transport header + AToM header + (MPLS label stack * MPLS label size))
	 
                                                      

                                                       The following sections describe the variables used in the equation:
	 
                                                      

                                                      Edge MTU
                                                       
		 
		
                                                       The edge MTU is the MTU for customer-facing interfaces. 
		
                                                      
 
	 
                                                      

                                                      Transport Header 
                                                       
		 
		
                                                       The Transport header depends on the transport type. The table below lists the specific sizes of the headers. 
		
                                                      
 
		

                                                      Table 1 Header Size of Packets 
                                                       
				  
                                                       Transport Type
				  
                                                      
 
				                                                      		
 
				  
                                                       Packet Size
				  
                                                      
 
				                                                      		

                                                      
                                                      

                                                       
				  
                                                       AAL5 
				  
                                                      
 
				                                                      		
 
				  
                                                       0-32 bytes 
				  
                                                      
 
				                                                      		

                                                      

                                                       
				  
                                                       Ethernet VLAN
				  
                                                      
 
				                                                      		
 
				  
                                                       18 bytes 
				  
                                                      
 
				                                                      		

                                                      

                                                       
				  
                                                       Ethernet Port
				  
                                                      
 
				                                                      		
 
				  
                                                       14 bytes
				  
                                                      
 
				                                                      		

                                                      

                                                       
				  
                                                       Frame Relay DLCI
				  
                                                      
 
				                                                      		
 
				  
                                                       2 bytes for Cisco encapsulation, 8 bytes for Internet Engineering Task Force (IETF) encapsulation
				  
                                                      
 
				                                                      		

                                                      

                                                       
				  
                                                       HDLC
				  
                                                      
 
				                                                      		
 
				  
                                                       4 bytes
				  
                                                      
 
				                                                      		

                                                      

                                                       
				  
                                                       PPP
				  
                                                      
 
				                                                      		
 
				  
                                                       4 bytes
				  
                                                      
 
				                                                      		

                                                      
                                                      

                                                      

                                                      
 
	 
                                                      

                                                      AToM Header 
                                                       
		 
		
                                                       The AToM header is 4 bytes (control word). The control word is optional for Ethernet, PPP, HDLC, and cell relay transport types. However, the control word is required for Frame Relay and ATM AAL5 transport types. 
		
                                                      
 
	 
                                                      

                                                      MPLS Label Stack 
                                                       
		 
		
                                                       The MPLS label stack size depends on the configuration of the core MPLS network:
		
                                                      
 
		
                                                      •  AToM uses one MPLS label to identify the AToM VCs (VC label). Therefore, the minimum MPLS label stack is one for directly connected AToM PEs, which are PE routers that do not have a P router between them. 
		  

                                                        • 

                                                      •  If LDP is used in the MPLS network, the label stack size is two (the LDP label and the VC label). 
		  

                                                        • 

                                                      •  If a TE tunnel is used instead of LDP between PE routers in the MPLS network, the label stack size is two (the TE label and the VC label). 
		  

                                                        • 

                                                      •  If a TE tunnel and LDP are used in the MPLS network (for example, a TE tunnel between P routers or between P and PE routers, with LDP on the tunnel), the label stack is three (the TE label, LDP label, and VC label). 
		  

                                                        • 

                                                      •  If you use MPLS fast reroute in the MPLS network, you add a label to the stack. The maximum MPLS label stack in this case is four (the FRR label, TE label, LDP label, and VC label). 
		  

                                                        • 

                                                      •  If AToM is used by the customer carrier in an MPLS VPN Carrier Supporting Carrier environment, you add a label to the stack. The maximum MPLS label stack in the provider carrier network is five (the FRR label, TE label, LDP label, VPN label, and VC label).
		  

                                                        • 

                                                      •  If an AToM tunnel spans different service providers that exchange MPLS labels using IPv4 Border Gateway Protocol (BGP) (RFC 3107), you add a label to the stack. The maximum MPLS label stack is five (the FRR label, TE label, Border Gateway Protocol (BGP) label, LDP label, and VC label). 
		  

                                                        • 

                                                      
 
		
                                                       Other circumstances can increase the MPLS label stack size. Therefore, analyze the complete data path between the AToM tunnel endpoints, determine the maximum MPLS label stack size for your network, and then multiply the label stack size by the size of the MPLS label. 
		
                                                      
 
	 
                                                      

                                                      

                                                      Example  Estimating Packet Size
                                                      

                                                      
      
                                                      
The size of packets is estimated in the following example, which uses the following assumptions:
                                                      

      
                                                      • 
The edge MTU is 1500 bytes.

                                                        • 

                                                      • 
The transport type is Ethernet VLAN, which designates 18 bytes for the transport header.

                                                        • 

                                                      • 
The AToM header is 0, because the control word is not used. 

                                                        • 

                                                      • 
The MPLS label stack is 2, because LDP is used. The MPLS label is 4 bytes. 

                                                        • 

                                                      

      
                                                      Edge MTU + Transport header + AToM header + (MPLS label stack * MPLS label) = Core MTU
1500     + 18                    + 0      + (2                * 4         ) = 1526

                                                      

      
                                                      
You must configure the P and PE routers in the core to accept packets of 1526 bytes. 
                                                      

      
                                                      
Once you determine the MTU size to set on your P and PE routers, you can issue the mtucommand on the routers to set the MTU size. The following example specifies an MTU of 1526 bytes:
                                                      

      
                                                      Router(config-if)# mtu 1526

                                                      

    
                                                      

                                                      

                                                      

                                                      mpls mtu Command Changes
                                                      

                                                       Some interfaces (such as FastEthernet) require the 
		mpls 
		  mtu command to change the MTU size. In Cisco IOS Release 12.2(25)S, the behavior of the 
		mpls 
		  mtu command changed.
	 
                                                      

                                                       If the interface MTU is fewer than 1524 bytes, you can set the maximum MPLS MTU to 24 bytes more than the interface MTU. For example, if the interface MTU is set to 1510 bytes, then you can set the maximum MPLS MTU to 1534 bytes (1510 + 24). 
	 
                                                      


                                                      Caution
                                                       
		
                                                       Although you can set the MPLS MTU to a value greater than the interface MTU, you must set the MPLS MTU value to less than or equal to the interface MTU to prevent data corruption, dropped packets, and high CPU rates. 
		
                                                      
 
	 
                                                      

                                                       If the interface MTU is greater than or equal to 1524 bytes, then you can set the maximum MPLS MTU value to as high as the interface MTU value. For example, if the interface MTU is set to 1600 bytes, then you can set the MPLS MTU to a maximum of 1600 bytes. If you set the MPLS MTU value to higher than the interface MTU, traffic is dropped.
	 
                                                      

                                                       For interfaces that do not allow you to configure the interface MTU value and for interfaces where the interface MTU is 1500 bytes, the MPLS MTU range is 64 to 1524 bytes. 
	 
                                                      

                                                       For GRE tunnel interfaces you can set the MPLS MTU value to either the default value or the maximum value that is supported by the platform for the interface. 
	 
                                                      

                                                       You can set the MPLS MTU value to the maximum value by using the 
		max keyword along with the 
		mpls 
		  mtu command. The 
		mpls 
		  mtu 
		  max command allows the previously dropped packets to pass through the GRE tunnel by fragmentation on the underlying physical interface. 
	 
                                                      

                                                       Note that the MPLS MTU value cannot be greater than the interface MTU value for non-GRE tunnels. 
	 
                                                      

                                                       If you upgrade to Cisco IOS Release 12.2(25)S and you have an MPLS MTU setting that does not conform to these guidelines, the command is rejected. 
	 
                                                      

                                                       For Cisco IOS Release 12.2(27)SBC, 12.2(33)SRA, 12.4(11)T, 12.2(33)SXH, and later releases, you cannot set the MPLS MTU to a value greater than the interface MTU. This eliminates problems, such as dropped packets, data corruption, and high CPU rates. See the MPLS MTU Command Changes document for more information. 
	 
                                                      

                                                      

                                                      

                                                      

                                                      Per-Subinterface MTU for Ethernet over MPLS
                                                      

                                                       MTU values can be specified in xconnect subinterface configuration mode. When you use xconnect subinterface configuration mode to set the MTU value, you establish a pseudowire connection for situations where the interfaces have different MTU values that cannot be changed. 
	 
                                                      

                                                       If you specify an MTU value in xconnect subinterface configuration mode that is outside the range of supported MTU values (64 bytes to the maximum number of bytes supported by the interface), the command might be rejected. If you specify an MTU value that is out of range in xconnect subinterface configuration mode, the router enters the command in subinterface configuration mode. 
	 
                                                      

                                                       For example, if you specify an MTU of 1501 in xconnect subinterface configuration mode, and that value is out of range, the router enters the command in subinterface configuration mode, where it is accepted:
	 
                                                      

                                                      Router# configure terminal
Router(config)# interface gigabitethernet0/0/2.1
Router(config-subif)# xconnect 10.10.10.1 100 encapsulation mpls
Router(config-subif-xconn)# mtu ?
<64 - 1500> MTU size in bytes
Router(config-subif-xconn)# mtu 1501 <<================
Router(config-subif)# mtu ?
<64 - 17940> MTU size in bytes

                                                      

                                                       If the MTU value is not accepted in either xconnect subinterface configuration mode or subinterface configuration mode, then the command is rejected.
	 
                                                      

                                                      

                                                      

                                                      Frame Relay over MPLS and DTE DCE and NNI Connections
                                                      

                                                       You can configure an interface as a DTE device or a DCE switch, or as a switch connected to a switch with network-to-network interface (NNI) connections. Use the following command in interface configuration mode: 
	 
                                                      

                                                       
		 
		  frame-relay 
		  intf-type 
		 [dce | 
		dte | 
		nni]
	 
                                                      

                                                       The keywords are explained in the table below.
	 
                                                      


                                                      Table 2 frame-relay intf-type Command Keywords
                                                       
				
                                                       Keyword
				
                                                      
 
			                                                       		
 
				
                                                       Description
				
                                                      
 
			                                                       		

                                                      
                                                      

                                                       
				
                                                       
				   
					 dce 
				   
				
                                                      
 
			                                                       		
 
				
                                                       Enables the router or access server to function as a switch connected to a router.
				
                                                      
 
			                                                       		

                                                      

                                                       
				
                                                       
				   
					 dte 
				   
				
                                                      
 
			                                                       		
 
				
                                                       Enables the router or access server to function as a DTE device. DTE is the default.
				
                                                      
 
			                                                       		

                                                      

                                                       
				
                                                       
				   
					 nni 
				   
				
                                                      
 
			                                                       		
 
				
                                                       Enables the router or access server to function as a switch connected to a switch. 
				
                                                      
 
			                                                       		

                                                      
                                                      

                                                      

                                                      

                                                      

                                                      Local Management Interface and Frame Relay over MPLS
                                                      

                                                      
Local Management Interface (LMI) is a protocol that communicates status information about PVCs. When a PVC is added, deleted, or changed, the LMI notifies the endpoint of the status change. LMI also provides a polling mechanism that verifies that a link is up. 
                                                      

                                                      

                                                      How LMI Works
                                                      

                                                       To determine the PVC status, LMI checks that a PVC is available from the reporting device to the Frame Relay end-user device. If a PVC is available, LMI reports that the status is “Active,” which means that all interfaces, line protocols, and core segments are operational between the reporting device and the Frame Relay end-user device. If any of those components is not available, the LMI reports a status of “Inactive.” 
	 
                                                      


                                                      Note
                                                       Only the DCE and NNI interface types can report the LMI status. 
	 
                                                      

                                                      

                                                       The figure below is a sample topology that helps illustrate how LMI works. 
	 
                                                      

                                                      Figure 1. Sample Topology 

                                                      

                                                       In the figure above, note the following: 
	 
                                                      

                                                      •  CE1 and PE1 and PE2 and CE2 are Frame Relay LMI peers. 
		

                                                        • 

                                                      •  CE1 and CE2 can be Frame Relay switches or end-user devices. 
		

                                                        • 

                                                      •  Each Frame Relay PVC comprises multiple segments. 
		

                                                        • 

                                                      •  The DLCI value is local to each segment and is changed as traffic is switched from segment to segment. Two Frame Relay PVC segments exist in the figure; one is between PE1 and CE1 and the other is between PE2 and CE2. 
		

                                                        • 

                                                      

                                                       The LMI protocol behavior depends on whether you have DLCI-to-DLCI or port-to-port connections. 
	 
                                                      

                                                      DLCI-to-DLCI Connections
                                                       
		 
		
                                                       If you have DLCI-to-DLCI connections, LMI runs locally on the Frame Relay ports between the PE and CE devices: 
		
                                                      
 
		
                                                      •  CE1 sends an active status to PE1 if the PVC for CE1 is available. If CE1 is a switch, LMI checks that the PVC is available from CE1 to the user device attached to CE1. 
		  

                                                        • 

                                                      •  PE1 sends an active status to CE1 if the following conditions are met: 
			 
                                                        •  A PVC for PE1 is available. 
				
                                                          • 

                                                        •  PE1 received an MPLS label from the remote PE router. 
				
                                                          • 

                                                        •  An MPLS tunnel label exists between PE1 and the remote PE. 
				
                                                          • 

                                                        
 
		  
                                                        

                                                        • 

                                                      
 
		
                                                       For DTE or DCE configurations, the following LMI behavior exists: The Frame Relay device accessing the network (DTE) does not report the PVC status. Only the network device (DCE) or NNI can report the status. Therefore, if a problem exists on the DTE side, the DCE is not aware of the problem. 
		
                                                      
 
	 
                                                      

                                                      Port-to-Port Connections
                                                       
		 
		
                                                       If you have port-to-port connections, the PE routers do not participate in the LMI status-checking procedures. LMI operates only between the CE routers. The CE routers must be configured as DCE-DTE or NNI-NNI. 
		
                                                      
 
		
                                                       For information about LMI, including configuration instructions, see the “Configuring the LMI” section of the Configuring Frame Relay document. 
		
                                                      
 
	 
                                                      

                                                      

                                                      

                                                      

                                                      

                                                      QoS Features Supported with AToM
                                                      

                                                       For information about configuring QoS features on Cisco 12000 series routers, see the following feature module:
	 
                                                      

                                                       Any Transport over MPLS (AToM): Layer 2 QoS for the Cisco 12000 Series Router (Quality of Service) 
	 
                                                      

                                                       The tables below list the QoS features supported by AToM on the Cisco 7200 and 7500 series routers.
	 
                                                      


                                                      Table 3 QoS Features Supported with Ethernet over MPLS on the Cisco 7200 and 7500 Series Routers 
                                                       
				
                                                       QoS Feature
				
                                                      
 
			                                                       		
 
				
                                                       Ethernet over MPLS 
				
                                                      
 
			                                                       		

                                                      
                                                      

                                                       
				
                                                       Service policy
				
                                                      
 
			                                                       		
 
				
                                                       Can be applied to:
				
                                                      
 
				
                                                      •  Interface (input and output)
				  

                                                        • 

                                                      •  Subinterface (input and output)
				  

                                                        • 

                                                      
 
			                                                       		

                                                      

                                                       
				
                                                       Classification
				
                                                      
 
			                                                       		
 
				
                                                       Supports the following commands:
				
                                                      
 
				
                                                      •  
					  
						match 
						cos 
					  (on interfaces and subinterfaces)
				  

                                                        • 

                                                      •  
					  
						match 
						mpls 
						experimental 
					  (on interfaces and subinterfaces)
				  

                                                        • 

                                                      •  
					  
						match 
						qos-group 
					  (on interfaces) (output policy)
				  

                                                        • 

                                                      
 
			                                                       		

                                                      

                                                       
				
                                                       Marking
				
                                                      
 
			                                                       		
 
				
                                                       Supports the following commands:
				
                                                      
 
				
                                                      •  
					  
						set 
						cos 
					  (output policy)
				  

                                                        • 

                                                      •  
					  
						set 
						discard-class 
					  (input policy)
				  

                                                        • 

                                                      •  
					  
						set 
						mpls 
						experimental 
					 (input policy) (on interfaces and subinterfaces)
				  

                                                        • 

                                                      •  
					  
						set 
						qos-group 
					  (input policy)
				  

                                                        • 

                                                      
 
			                                                       		

                                                      

                                                       
				
                                                       Policing
				
                                                      
 
			                                                       		
 
				
                                                       Supports the following:
				
                                                      
 
				
                                                      •  Single-rate policing
				  

                                                        • 

                                                      •  Two-rate policing
				  

                                                        • 

                                                      •  Color-aware policing
				  

                                                        • 

                                                      •  Multiple-action policing
				  

                                                        • 

                                                      
 
			                                                       		

                                                      

                                                       
				
                                                       Queueing and shaping
				
                                                      
 
			                                                       		
 
				
                                                       Supports the following:
				
                                                      
 
				
                                                      •  Distributed Low Latency Queueing (dLLQ) 
				  

                                                        • 

                                                      •  Distributed Weighted Random Early Detection (dWRED)
				  

                                                        • 

                                                      •  Byte-based WRED
				  

                                                        • 

                                                      
 
			                                                       		

                                                      
                                                      

                                                      

                                                      


                                                      Table 4 QoS Features Supported with Frame Relay over MPLS on the Cisco 7200 and 7500 Series Routers 
                                                       
				
                                                       QoS Feature
				
                                                      
 
			                                                       		
 
				
                                                       Frame Relay over MPLS 
				
                                                      
 
			                                                       		

                                                      
                                                      

                                                       
				
                                                       Service policy
				
                                                      
 
			                                                       		
 
				
                                                       Can be applied to:
				
                                                      
 
				
                                                      •  Interface (input and output)
				  

                                                        • 

                                                      •  PVC (input and output)
				  

                                                        • 

                                                      
 
			                                                       		

                                                      

                                                       
				
                                                       Classification
				
                                                      
 
			                                                       		
 
				
                                                       Supports the following commands:
				
                                                      
 
				
                                                      •  
					  
						match 
						fr-de 
					  (on interfaces and VCs)
				  

                                                        • 

                                                      •  
					  
						match 
						fr-dlci 
					 (on interfaces)
				  

                                                        • 

                                                      •  
					  
						match 
						qos-group 
					  
				  

                                                        • 

                                                      
 
			                                                       		

                                                      

                                                       
				
                                                       Marking
				
                                                      
 
			                                                       		
 
				
                                                       Supports the following commands:
				
                                                      
 
				
                                                      •  
					  
						frame-relay 
						congestion 
						management 
					  (output)
				  

                                                        • 

                                                      •  
					  
						set 
						discard-class 
					  
				  

                                                        • 

                                                      •  
					  
						set 
						fr-de 
					  (output policy)
				  

                                                        • 

                                                      •  
					  
						set 
						fr-fecn-becn 
					  (output)
				  

                                                        • 

                                                      •  
					  
						set 
						mpls 
						experimental 
					  
				  

                                                        • 

                                                      •  
					  
						set 
						qos-group 
					  
				  

                                                        • 

                                                      •  
					  
						threshold 
						ecn 
					  (output)
				  

                                                        • 

                                                      
 
			                                                       		

                                                      

                                                       
				
                                                       Policing
				
                                                      
 
			                                                       		
 
				
                                                       Supports the following:
				
                                                      
 
				
                                                      •  Single-rate policing
				  

                                                        • 

                                                      •  Two-rate policing
				  

                                                        • 

                                                      •  Color-aware policing
				  

                                                        • 

                                                      •  Multiple-action policing
				  

                                                        • 

                                                      
 
			                                                       		

                                                      

                                                       
				
                                                       Queueing and shaping
				
                                                      
 
			                                                       		
 
				
                                                       Supports the following:
				
                                                      
 
				
                                                      •  dLLQ
				  

                                                        • 

                                                      •  dWRED
				  

                                                        • 

                                                      •  Distributed traffic shaping
				  

                                                        • 

                                                      •  Distributed class-based weighted fair queueing (dCBWFQ)
				  

                                                        • 

                                                      •  Byte-based WRED
				  

                                                        • 

                                                      •  
					  
						random-detect 
						discard-class-based 
					  command
				  

                                                        • 

                                                      
 
			                                                       		

                                                      
                                                      

                                                      

                                                      


                                                      Table 5 QoS Features Supported with ATM Cell Relay and AAL5 over MPLS on the Cisco 7200 and 7500 Series Routers
                                                       
				
                                                       QoS Feature
				
                                                      
 
			                                                       		
 
				
                                                       ATM Cell Relay and AAL5 over MPLS
				
                                                      
 
			                                                       		

                                                      
                                                      

                                                       
				
                                                       Service policy
				
                                                      
 
			                                                       		
 
				
                                                       Can be applied to:
				
                                                      
 
				
                                                      •  Interface (input and output)
				  

                                                        • 

                                                      •  Subinterface (input and output)
				  

                                                        • 

                                                      •  PVC (input and output)
				  

                                                        • 

                                                      
 
			                                                       		

                                                      

                                                       
				
                                                       Classification
				
                                                      
 
			                                                       		
 
				
                                                       Supports the following commands:
				
                                                      
 
				
                                                      •  
					  
						match 
						mpls 
						experimental 
					 (on VCs)
				  

                                                        • 

                                                      •  
					  
						match 
						qos-group 
					  (output)
				  

                                                        • 

                                                      
 
			                                                       		

                                                      

                                                       
				
                                                       Marking
				
                                                      
 
			                                                       		
 
				
                                                       Supports the following commands:
				
                                                      
 
				
                                                      •  
					  
						random-detect 
						discard-class-based 
					  (input)
				  

                                                        • 

                                                      •  
					  
						set 
						clp 
					  (output) (on interfaces, subinterfaces, and VCs)
				  

                                                        • 

                                                      •  
					  
						set 
						discard-class 
					  (input)
				  

                                                        • 

                                                      •  
					  
						set 
						mpls 
						experimental 
					  (input) (on interfaces, subinterfaces, and VCs)
				  

                                                        • 

                                                      •  
					  
						set 
						qos-group 
					  (input)
				  

                                                        • 

                                                      
 
			                                                       		

                                                      

                                                       
				
                                                       Policing
				
                                                      
 
			                                                       		
 
				
                                                       Supports the following:
				
                                                      
 
				
                                                      •  Single-rate policing
				  

                                                        • 

                                                      •  Two-rate policing
				  

                                                        • 

                                                      •  Color-aware policing
				  

                                                        • 

                                                      •  Multiple-action policing
				  

                                                        • 

                                                      
 
			                                                       		

                                                      

                                                       
				
                                                       Queueing and shaping
				
                                                      
 
			                                                       		
 
				
                                                       Supports the following:
				
                                                      
 
				
                                                      •  dLLQ
				  

                                                        • 

                                                      •  dWRED
				  

                                                        • 

                                                      •  dCBWFQ
				  

                                                        • 

                                                      •  Byte-based WRED
				  

                                                        • 

                                                      •  random-detect discard-class-based command
				  

                                                        • 

                                                      •  Class-based shaping support on ATM PVCs
				  

                                                        • 

                                                      
 
			                                                       		

                                                      
                                                      

                                                      

                                                      

                                                      

                                                      

                                                      

                                                      How to Configure Any Transport over MPLS
                                                      

                                                      
This section explains how to perform a basic AToM configuration and includes the following procedures:
                                                      

                                                      

                                                      Configuring the Pseudowire Class
                                                      

                                                       
		
                                                       The successful transmission of the Layer 2 frames between PE routers is due to the configuration of the PE routers. You set up the connection, called a pseudowire, between the routers. 
		
                                                      
 
		

                                                      Note
                                                       In simple configurations, this task is optional. You do not need to specify a pseudowire class if you specify the tunneling method as part of the 
		  xconnectcommand. 
		
                                                      

                                                      
 
		
                                                       The pseudowire-class configuration group specifies the following characteristics of the tunneling mechanism: 
		
                                                      
 
		
                                                      •  Encapsulation type
		  

                                                        • 

                                                      •  Control protocol
		  

                                                        • 

                                                      •  Payload-specific options
		  

                                                        • 

                                                      
 
		
                                                       For more information about the 
		  pseudowire-classcommand, see the following feature module: Layer 2 Tunnel Protocol Version 3. 
		
                                                      
 
		
                                                       You must specify the 
		  encapsulation 
			 mplscommandas part of the pseudowire class or as part of the 
		  xconnect command for the AToM VCs to work properly. If you omit the 
		  encapsulation 
			 mplscommandas part of the 
		  xconnectcommand, you will receive the following error:
		
                                                      
 
		
                                                      % Incomplete command.
                                                      
 
	 
                                                      
SUMMARY STEPS
                                                        1.   
       
			  
				enable 
			  
		  
                                                        

                                                        2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                        

                                                        3.   
       
			  
				pseudowire-class 
			  
			  
				name 
			  
		  
                                                        

                                                        4.   
       
			  
				encapsulation 
				mpls 
			  
			  
				 
				 
			  
		  
                                                        

                                                        5.   
       
			  
				end 
			  
		  
                                                        


                                                      DETAILED STEPS
                                                         Command or ActionPurpose
                                                        Step 1 
			  
				enable 
			  
		  
                                                         

                                                        Example:
                                                         
			 
                                                        Router> enable
                                                        
 
		  
                                                        
 
                                                              		  
			 
                                                         Enables privileged EXEC mode. 
			 
                                                        
 
			 
                                                        •  Enter your password if prompted.
				

                                                          • 

                                                        
 
		   
      
                                                        

                                                        Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                         

                                                        Example:
                                                         
			 
                                                        Router# configure terminal
                                                        
 
		  
                                                        
 
                                                              		  
			 
                                                         Enters global configuration mode.
			 
                                                        
 
		   
      
                                                        

                                                        Step 3 
			  
				pseudowire-class 
			  
			  
				name 
			  
		  
                                                         

                                                        Example:
                                                         
			 
                                                        Router(config)# pseudowire-class atom
                                                        
 
		  
                                                        
 
                                                              		  
			 
                                                         Establishes a pseudowire class with a name that you specify and enters pseudowire class configuration mode. 
			 
                                                        
 
		   
      
                                                        

                                                        Step 4 
			  
				encapsulation 
				mpls 
			  
			  
				 
				 
			  
		  
                                                         

                                                        Example:
                                                         
			 
                                                        Router(config-pw-class)# encapsulation mpls 
                                                        
 
		  
                                                        
 
                                                              		  
			 
                                                         Specifies the tunneling encapsulation. 
			 
                                                        
 
		   
      
                                                        

                                                        Step 5 
			  
				end 
			  
		  
                                                         

                                                        Example:
                                                         
			 
                                                        Router(config-pw-class)# end
                                                        
 
		  
                                                        
 
                                                              		  
			 
                                                         Exits pseudowire class configuration mode and returns to privileged EXEC mode.
			 
                                                        
 
		   
      
                                                        

                                                        
What to Do Next
                                                        

		
                                                         To change the type of encapsulation, remove the pseudowire with the 
		  no 
			 pseudowire-class command, reestablish the pseudowire, and specify the new encapsulation type.
		
                                                        
 
		
                                                         Once you specify the 
		  encapsulation 
			 mpls command, you can neither remove it using the 
		  no 
			 encapsulation 
			 mplscommand nor change the command setting using the 
		  encapsulation 
			 l2tpv3 command. If you try to remove or change the encapsulation type using the above-mentioned commands, you will get the following error message:
		
                                                        
 
		
                                                        Encapsulation changes are not allowed on an existing pw-class.

                                                        
 
		
                                                         To remove a pseudowire, use the 
		  clear 
			 xconnect command in privileged EXEC mode. You can remove all pseudowires or specific pseudowires on an interface or peer router. 
		
                                                        
 
	 
                                                        

                                                        

                                                        Configuring ATM AAL5 over MPLS on PVCs
                                                        

                                                         
		
                                                         ATM AAL5 over MPLS for PVCs encapsulates ATM AAL5 service data unit (SDUs) in MPLS packets and forwards them across the MPLS network. Each ATM AAL5 SDU is transported as a single packet. 
		
                                                        
 
		

                                                        Note
                                                         
		  
                                                         AAL5 over MPLS is supported only in SDU mode. 
		  
                                                        
 > 
		
                                                        
 
	 
                                                        
SUMMARY STEPS
                                                          1.   
       
			  
				enable 
			  
		  
                                                          

                                                          2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                          

                                                          3.   
       
			  
				interface 
			  
			  
				typeslot/port 
			  
		  
                                                          

                                                          4.   
       
			  
				pvc 
			  [name] 
			 vpi/vci 
			 l2transport 
		  
                                                          

                                                          5.   
       
			  
				encapsulation 
				aal5 
			  
		  
                                                          

                                                          6.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                          

                                                          7.   
       
			  
				exit 
			  
		  
                                                          

                                                          8.   
       
			  
				exit 
			  
		  
                                                          

                                                          9.   
       
			  
				exit 
			  
		  
                                                          

                                                          10.   
       
			  
				show 
				mpls 
				l2transport 
				vc 
			  
		  
                                                          


                                                        DETAILED STEPS
                                                           Command or ActionPurpose
                                                          Step 1 
			  
				enable 
			  
		  
                                                           

                                                          Example:
                                                           
			 
                                                          Router> enable
                                                          
 
		  
                                                          
 
                                                                		  
			 
                                                           Enables privileged EXEC mode. 
			 
                                                          
 
			 
                                                          •  Enter your password if prompted. 
				

                                                            • 

                                                          
 
		   
      
                                                          

                                                          Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                           

                                                          Example:
                                                           
			 
                                                          Router# configure terminal
                                                          
 
		  
                                                          
 
                                                                		  
			 
                                                           Enters global configuration mode. 
			 
                                                          
 
		   
      
                                                          

                                                          Step 3 
			  
				interface 
			  
			  
				typeslot/port 
			  
		  
                                                           

                                                          Example:
                                                           
			 
                                                          Router(config)# interface atm1/0
                                                          
 
		  
                                                          
 
                                                                		  
			 
                                                           Specifies the interface by type, slot, and port number, and enters interface configuration mode. 
			 
                                                          
 
		   
      
                                                          

                                                          Step 4 
			  
				pvc 
			  [name] 
			 vpi/vci 
			 l2transport 
		  
                                                           

                                                          Example:
                                                           
			 
                                                          Router(config-if)# pvc 1/200 l2transport
                                                          
 
		  
                                                          
 
                                                                		  
			 
                                                           Creates or assigns a name to an ATM PVC and enters L2transport PVC configuration mode. 
			 
                                                          
 
			 
                                                          •  The 
				  l2transport keyword indicates that the PVC is a switched PVC instead of a terminated PVC. 
				

                                                            • 

                                                          
 
		   
      
                                                          

                                                          Step 5 
			  
				encapsulation 
				aal5 
			  
		  
                                                           

                                                          Example:
                                                           
			 
                                                          Router(config-if-atm-l2trans-pvc)# encapsulation aal5
                                                          
 
		  
                                                          
 
                                                                		  
			 
                                                           Specifies the ATM ALL5 encapsulation for the PVC. 
			 
                                                          
 
			 
                                                          •  Make sure that you specify the same encapsulation type on the PE and CE routers. 
				

                                                            • 

                                                          
 
		   
      
                                                          

                                                          Step 6 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                           

                                                          Example:
                                                           
			 
                                                          Router(config-if-atm-l2trans-pvc)# xconnect 10.13.13.13 100 encapsulation mpls
                                                          
 
		  
                                                          
 
                                                                		  
			 
                                                           Binds the attachment circuit to a pseudowire VC. 
			 
                                                          
 
		   
      
                                                          

                                                          Step 7 
			  
				exit 
			  
		  
                                                           

                                                          Example:
                                                           
			 
                                                          Router(config-if-atm-l2trans-pvc)# exit
                                                          
 
		  
                                                          
 
                                                                		  
			 
                                                           Exits L2transport PVC configuration mode. 
			 
                                                          
 
		   
      
                                                          

                                                          Step 8 
			  
				exit 
			  
		  
                                                           

                                                          Example:
                                                           
			 
                                                          Router(config-if)# exit
                                                          
 
		  
                                                          
 
                                                                		  
			 
                                                           Exits interface configuration mode. 
			 
                                                          
 
		   
      
                                                          

                                                          Step 9 
			  
				exit 
			  
		  
                                                           

                                                          Example:
                                                           
			 
                                                          Router(config)# exit
                                                          
 
		  
                                                          
 
                                                                		  
			 
                                                           Exits global configuration mode. 
			 
                                                          
 
		   
      
                                                          

                                                          Step 10 
			  
				show 
				mpls 
				l2transport 
				vc 
			  
		  
                                                           

                                                          Example:
                                                           
			 
                                                          Router# show mpls l2transport vc
                                                          
 
		  
                                                          
 
                                                                		  
			 
                                                           Displays output that shows ATM AAL5 over MPLS is configured on a PVC. 
			 
                                                          
 
		   
      
                                                          

                                                          

                                                          Examples
                                                          
		
		
                                                           The following is sample output from the 
		  show 
			 mpls 
			 l2transport 
			 vccommand, which shows that ATM AAL5 over MPLS is configured on a PVC: 
		
                                                          

		
                                                          Router# show mpls l2transport vc
Local intf   Local circuit          Dest address      VC ID      Status
---------    -------------          ------------      -----      ------
ATM1/0       ATM AAL5 1/100         10.4.4.4           100        UP
                                                          

	 
                                                          

                                                          

                                                          

                                                          Configuring ATM AAL5 over MPLS in VC Class Configuration Mode
                                                          

                                                           
		
                                                           You can create a VC class that specifies the AAL5 encapsulation and then attach the encapsulation type to an interface, subinterface, or PVC. The following task creates a VC class and attaches it to a main interface. 
		
                                                          
 
		

                                                          Note
                                                           
		  
                                                           AAL5 over MPLS is supported only in SDU mode. 
		  
                                                          
 >
		
                                                          
 
	 
                                                          
SUMMARY STEPS
                                                            1.   
       
			  
				enable 
			  
		  
                                                            

                                                            2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                            

                                                            3.   
       
			  
				vc-class 
				atm 
			  
			  
				vc-class-name 
			  
		  
                                                            

                                                            4.   
       
			  
				encapsulation 
			  
			  
				 
				 
			  
			  
				layer-type 
			  
		  
                                                            

                                                            5.   
       
			  
				exit 
			  
		  
                                                            

                                                            6.   
       
			  
				interface 
			  
			  
				typeslot/port 
			  
		  
                                                            

                                                            7.   
       
			  
				class-int 
			  
			  
				 
				 
			  
			  
				vc-class-name 
			  
			  
				 
				 
			  
		  
                                                            

                                                            8.   
       
			  
				pvc 
			  [name] 
			 vpi/vci 
			 l2transport
		  
                                                            

                                                            9.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                            

                                                            10.   
       
			  
				exit 
			  
		  
                                                            

                                                            11.   
       
			  
				exit 
			  
		  
                                                            

                                                            12.   
       
			  
				exit 
			  
		  
                                                            

                                                            13.   
       
			  
				show 
				atm 
				class-links 
			  
		  
                                                            


                                                          DETAILED STEPS
                                                             Command or ActionPurpose
                                                            Step 1 
			  
				enable 
			  
		  
                                                             

                                                            Example:
                                                             
			 
                                                            Router> enable
                                                            
 
		  
                                                            
 
                                                                  		  
			 
                                                             Enables privileged EXEC mode. 
			 
                                                            
 
			 
                                                            •  Enter your password if prompted.
				

                                                              • 

                                                            
 
		   
      
                                                            

                                                            Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                             

                                                            Example:
                                                             
			 
                                                            Router# configure terminal
                                                            
 
		  
                                                            
 
                                                                  		  
			 
                                                             Enters global configuration mode.
			 
                                                            
 
		   
      
                                                            

                                                            Step 3 
			  
				vc-class 
				atm 
			  
			  
				vc-class-name 
			  
		  
                                                             

                                                            Example:
                                                             
			 
                                                            Router(config)# vc-class atm aal5class
                                                            
 
		  
                                                            
 
                                                                  		  
			 
                                                             Creates a VC class and enters VC class configuration mode.
			 
                                                            
 
		   
      
                                                            

                                                            Step 4 
			  
				encapsulation 
			  
			  
				 
				 
			  
			  
				layer-type 
			  
		  
                                                             

                                                            Example:
                                                             
			 
                                                            Router(config-vc-class)# encapsulation aal5
                                                            
 
		  
                                                            
 
                                                                  		  
			 
                                                             Configures AAL and the encapsulation type. 
			 
                                                            
 
		   
      
                                                            

                                                            Step 5 
			  
				exit 
			  
		  
                                                             

                                                            Example:
                                                             
			 
                                                            Router(config-vc-class)# exit
                                                            
 
		  
                                                            
 
                                                                  		  
			 
                                                             Exits VC class configuration mode. 
			 
                                                            
 
		   
      
                                                            

                                                            Step 6 
			  
				interface 
			  
			  
				typeslot/port 
			  
		  
                                                             

                                                            Example:
                                                             
			 
                                                            Router(config)# interface atm1/0
                                                            
 
		  
                                                            
 
                                                                  		  
			 
                                                             Specifies the interface by type, slot, and port number, and enters interface configuration mode.
			 
                                                            
 
		   
      
                                                            

                                                            Step 7 
			  
				class-int 
			  
			  
				 
				 
			  
			  
				vc-class-name 
			  
			  
				 
				 
			  
		  
                                                             

                                                            Example:
                                                             
			 
                                                            Router(config-if)# class-int aal5class
                                                            
 
		  
                                                            
 
                                                                  		  
			 
                                                             Applies a VC class to the ATM main interface or subinterface. 
			 
                                                            
 
			 
                                                            Note   
                
              
                                                             You can also apply a VC class to a PVC. 
			 
                                                            

                                                            
 
		   
      
                                                            

                                                            Step 8 
			  
				pvc 
			  [name] 
			 vpi/vci 
			 l2transport
		  
                                                             

                                                            Example:
                                                             
			 
                                                            Router(config-if)# pvc 1/200 l2transport
                                                            
 
		  
                                                            
 
                                                                  		  
			 
                                                             Creates or assigns a name to an ATM PVC and enters L2transport PVC configuration mode. 
			 
                                                            
 
			 
                                                            •  The 
				  l2transport keyword indicates that the PVC is a switched PVC instead of a terminated PVC. 
				

                                                              • 

                                                            
 
		   
      
                                                            

                                                            Step 9 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                             

                                                            Example:
                                                             
			 
                                                            Router(config-if-atm-l2trans-pvc)# xconnect 10.13.13.13 100 encapsulation mpls
                                                            
 
		  
                                                            
 
                                                                  		  
			 
                                                             Binds the attachment circuit to a pseudowire VC. 
			 
                                                            
 
		   
      
                                                            

                                                            Step 10 
			  
				exit 
			  
		  
                                                             

                                                            Example:
                                                             
			 
                                                            Router(config-if-atm-l2trans-pvc)# exit
                                                            
 
		  
                                                            
 
                                                                  		  
			 
                                                             Exits L2transport PVC configuration mode.
			 
                                                            
 
		   
      
                                                            

                                                            Step 11 
			  
				exit 
			  
		  
                                                             

                                                            Example:
                                                             
			 
                                                            Router(config-if)# exit
                                                            
 
		  
                                                            
 
                                                                  		  
			 
                                                             Exits interface configuration mode.
			 
                                                            
 
		   
      
                                                            

                                                            Step 12 
			  
				exit 
			  
		  
                                                             

                                                            Example:
                                                             
			 
                                                            Router(config)# exit
                                                            
 
		  
                                                            
 
                                                                  		  
			 
                                                             Exits global configuration mode.
			 
                                                            
 
		   
      
                                                            

                                                            Step 13 
			  
				show 
				atm 
				class-links 
			  
		  
                                                             

                                                            Example:
                                                             
			 
                                                            Router# show atm class-links
                                                            
 
		  
                                                            
 
                                                                  		  
			 
                                                             Shows the type of encapsulation and that the VC class was applied to an interface.
			 
                                                            
 
		   
      
                                                            

                                                            

                                                            Examples
                                                            
		
		
                                                             In the following example, the command output of the 
		  show 
			 atm 
			 class-linkscommand verifies that ATM AAL5 over MPLS is configured as part of a VC class. The command output shows the type of encapsulation and that the VC class was applied to an interface. 
		
                                                            

		
                                                            Router# show atm class-links 1/100
Displaying vc-class inheritance for ATM1/
0.0, vc 1/
100:
no broadcast - Not configured - using default
encapsulation aal5 - VC-class configured on main interface
                                                            

	 
                                                            

                                                            

                                                            

                                                            Configuring OAM Cell Emulation for ATM AAL5 over MPLS
                                                            

                                                            
If a PE router does not support the transport of Operation, Administration, and Maintenance (OAM) cells across a label switched path (LSP), you can use OAM cell emulation to locally terminate or loop back the OAM cells. You configure OAM cell emulation on both PE routers, which emulates a VC by forming two unidirectional LSPs. You use the oam-ac emulation-enableand oam-pvc managecommands on both PE routers to enable OAM cell emulation. 
                                                            

                                                            
After you enable OAM cell emulation on a router, you can configure and manage the ATM VC in the same manner as you would a terminated VC. A VC that has been configured with OAM cell emulation can send loopback cells at configured intervals toward the local CE router. The endpoint can be either of the following:
                                                            

                                                            • 
End-to-end loopback, which sends OAM cells to the local CE router.

                                                              • 

                                                            • 
Segment loopback, which responds to OAM cells to a device along the path between the PE and CE routers. 

                                                              • 

                                                            

                                                            
The OAM cells include the following cells:
                                                            

                                                            • 
Alarm indication signal (AIS) 

                                                              • 

                                                            • 
Remote defect indication (RDI)

                                                              • 

                                                            

                                                            
These cells identify and report defects along a VC. When a physical link or interface failure occurs, intermediate nodes insert OAM AIS cells into all the downstream devices affected by the failure. When a router receives an AIS cell, it marks the ATM VC down and sends an RDI cell to let the remote end know about the failure. 
                                                            

                                                            
This section contains two tasks:
                                                            

                                                            

                                                            Configuring OAM Cell Emulation for ATM AAL5 over MPLS on PVCs
                                                            

                                                             
		
                                                             Perform this task to configure OAM cell emulation for ATM AAL5 over MPLS on a PVC. 
		
                                                            
 
		

                                                            Note
                                                             For AAL5 over MPLS, you can configure the 
		  oam-pvc 
			 managecommandonly after you issue the 
		  oam-ac 
			 emulation-enable command. 
		
                                                            

                                                            
 
	 
                                                            
SUMMARY STEPS
                                                              1.   
       
			  
				enable 
			  
		  
                                                              

                                                              2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                              

                                                              3.   
       
			  
				interface 
			  
			  
				typeslot 
			 /port 
		  
                                                              

                                                              4.   
       
			  
				pvc 
			  [name] 
			 vpi/vci 
			 l2transport 
		  
                                                              

                                                              5.   
       
			  
				encapsulation 
				aal5 
			  
		  
                                                              

                                                              6.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                              

                                                              7.   
       
			  
				oam-ac 
				emulation-enable 
			 [ais-rate] 
		  
                                                              

                                                              8.   
       
			  
				oam-pvc 
				manage 
			  [frequency] 
		  
                                                              

                                                              9.   
       
			  
				exit 
			  
		  
                                                              

                                                              10.   
       
			  
				exit 
			  
		  
                                                              

                                                              11.   
       
			  
				exit 
			  
		  
                                                              

                                                              12.   
       
			  
				show 
				atm 
				pvc 
			  
		  
                                                              


                                                            DETAILED STEPS
                                                               Command or ActionPurpose
                                                              Step 1 
			  
				enable 
			  
		  
                                                               

                                                              Example:
                                                               
			 
                                                              Router> enable
                                                              
 
		  
                                                              
 
                                                                    		  
			 
                                                               Enables privileged EXEC mode. 
			 
                                                              
 
			 
                                                              •  Enter your password if prompted. 
				

                                                                • 

                                                              
 
		   
      
                                                              

                                                              Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                               

                                                              Example:
                                                               
			 
                                                              Router# configure terminal
                                                              
 
		  
                                                              
 
                                                                    		  
			 
                                                               Enters global configuration mode. 
			 
                                                              
 
		   
      
                                                              

                                                              Step 3 
			  
				interface 
			  
			  
				typeslot 
			 /port 
		  
                                                               

                                                              Example:
                                                               
			 
                                                              Router(config)# interface atm1/0
                                                              
 
		  
                                                              
 
                                                                    		  
			 
                                                               Specifies the interface by type, slot, and port number, and enters interface configuration mode. 
			 
                                                              
 
		   
      
                                                              

                                                              Step 4 
			  
				pvc 
			  [name] 
			 vpi/vci 
			 l2transport 
		  
                                                               

                                                              Example:
                                                               
			 
                                                              Router(config-if)# pvc 1/200 l2transport
                                                              
 
		  
                                                              
 
                                                                    		  
			 
                                                               Creates or assigns a name to an ATM PVC and enters L2transport PVC configuration mode. 
			 
                                                              
 
			 
                                                              •  The 
					 l2transport keyword indicates that the PVC is a switched PVC instead of a terminated PVC. 
				

                                                                • 

                                                              
 
		   
      
                                                              

                                                              Step 5 
			  
				encapsulation 
				aal5 
			  
		  
                                                               

                                                              Example:
                                                               
			 
                                                              Router(config-if-atm-l2trans-pvc)# encapsulation aal5
                                                              
 
		  
                                                              
 
                                                                    		  
			 
                                                               Specifies ATM AAL5 encapsulation for the PVC. 
			 
                                                              
 
			 
                                                              •  Make sure you specify the same encapsulation type on the PE and CE routers. 
				

                                                                • 

                                                              
 
		   
      
                                                              

                                                              Step 6 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                               

                                                              Example:
                                                               
			 
                                                              Router(config-if-atm-l2trans-pvc)# xconnect 10.13.13.13 100 encapsulation mpls
                                                              
 
		  
                                                              
 
                                                                    		  
			 
                                                               Binds the attachment circuit to a pseudowire VC. 
			 
                                                              
 
		   
      
                                                              

                                                              Step 7 
			  
				oam-ac 
				emulation-enable 
			 [ais-rate] 
		  
                                                               

                                                              Example:
                                                               
			 
                                                              Router(config-if-atm-l2trans-pvc)# oam-ac emulation-enable 30
                                                              
 
		  
                                                              
 
                                                                    		  
			 
                                                               Enables OAM cell emulation for AAL5 over MPLS. 
			 
                                                              
 
			 
                                                              •  The 
				  ais-rate argument lets you specify the rate at which AIS cells are sent. The default is one cell every second. The range is 0 to 60 seconds. 
				

                                                                • 

                                                              
 
		   
      
                                                              

                                                              Step 8 
			  
				oam-pvc 
				manage 
			  [frequency] 
		  
                                                               

                                                              Example:
                                                               
			 
                                                              Router(config-if-atm-l2trans-pvc)# oam-pvc manage
                                                              
 
		  
                                                              
 
                                                                    		  
			 
                                                               Enables the PVC to generate end-to-end OAM loopback cells that verify connectivity on the virtual circuit. 
			 
                                                              
 
			 
                                                              •  The optional 
				  frequency argument is the interval between transmission of loopback cells and ranges from 0 to 600 seconds. The default value is 10 seconds. 
				

                                                                • 

                                                              
 
		   
      
                                                              

                                                              Step 9 
			  
				exit 
			  
		  
                                                               

                                                              Example:
                                                               
			 
                                                              Router(config-if-atm-l2trans-pvc)# exit
                                                              
 
		  
                                                              
 
                                                                    		  
			 
                                                               Exits L2transport PVC configuration mode. 
			 
                                                              
 
		   
      
                                                              

                                                              Step 10 
			  
				exit 
			  
		  
                                                               

                                                              Example:
                                                               
			 
                                                              Router(config-if)# exit
                                                              
 
		  
                                                              
 
                                                                    		  
			 
                                                               Exits interface configuration mode. 
			 
                                                              
 
		   
      
                                                              

                                                              Step 11 
			  
				exit 
			  
		  
                                                               

                                                              Example:
                                                               
			 
                                                              Router(config)# exit
                                                              
 
		  
                                                              
 
                                                                    		  
			 
                                                               Exits global configuration mode. 
			 
                                                              
 
		   
      
                                                              

                                                              Step 12 
			  
				show 
				atm 
				pvc 
			  
		  
                                                               

                                                              Example:
                                                               
			 
                                                              Router# show atm pvc
                                                              
 
		  
                                                              
 
                                                                    		  
			 
                                                               Displays output that shows OAM cell emulation is enabled on the ATM PVC. 
			 
                                                              
 
		   
      
                                                              

                                                              

                                                              Examples
                                                              
		
		
                                                               The output of the 
		  show 
			 atm 
			 pvc command in the following example shows that OAM cell emulation is enabled on the ATM PVC: 
		
                                                              

		
                                                              Router# show atm pvc 5/500
ATM4/1/0.200: VCD: 6, VPI: 5, VCI: 500                    
UBR, PeakRate: 1                                         
AAL5-LLC/SNAP, etype:0x0, Flags: 0x34000C20, VCmode: 0x0 
OAM Cell Emulation: enabled, F5 End2end AIS Xmit frequency: 1 second(s) 
OAM frequency: 0 second(s), OAM retry frequency: 1 second(s)
OAM up retry count: 3, OAM down retry count: 5
OAM Loopback status: OAM Disabled
OAM VC state: Not ManagedVerified
ILMI VC state: Not Managed
InPkts: 564, OutPkts: 560, InBytes: 19792, OutBytes: 19680
InPRoc: 0, OutPRoc: 0
InFast: 4, OutFast: 0, InAS: 560, OutAS: 560
InPktDrops: 0, OutPktDrops: 0
CrcErrors: 0, SarTimeOuts: 0, OverSizedSDUs: 0
Out CLP=1 Pkts: 0
OAM cells received: 26
F5 InEndloop: 0, F5 InSegloop: 0, F5 InAIS: 0, F5 InRDI: 26
OAM cells sent: 77
F5 OutEndloop: 0, F5 OutSegloop: 0, F5 OutAIS: 77, F5 OutRDI: 0 
OAM cell drops: 0
Status: UP
                                                              

	 
                                                              

                                                              

                                                              

                                                              Configuring OAM Cell Emulation for ATM AAL5 over MPLS in VC Class Configuration Mode
                                                              

                                                              
      
                                                              
The following steps explain how to configure OAM cell emulation as part of a VC class. You can then apply the VC class to an interface, a subinterface, or a VC. When you configure OAM cell emulation in VC class configuration mode and then apply the VC class to an interface, the settings in the VC class apply to all the VCs on the interface, unless you specify a different OAM cell emulation value at a lower level, such as the subinterface or VC level. For example, you can create a VC class that specifies OAM cell emulation and sets the rate of AIS cells to every 30 seconds. You can apply the VC class to an interface. Then, for one PVC, you can enable OAM cell emulation and set the rate of AIS cells to every 15 seconds. All the PVCs on the interface use the cell rate of 30 seconds, except for the one PVC that was set to 15 seconds. 
                                                              

      
                                                              
Perform this task to enable OAM cell emulation as part of a VC class and apply it to an interface. 
                                                              

      

                                                              Note
                                                              
For AAL5 over MPLS, you can configure the oam-pvc managecommand only after you issue the oam-ac emulation-enable command.
                                                              

                                                              

    
                                                              
SUMMARY STEPS
                                                                1.   
      
          
            enable
          
        
                                                                

                                                                2.   
      
          
            configure
          
          
            terminal
          
        
                                                                

                                                                3.   
      
          
            vc-class
            atm
          
          
            name
          
        
                                                                

                                                                4.   
      
          
            encapsulation
          
          
            
            
          
          
            layer-type
          
        
                                                                

                                                                5.   
      
          
            oam-ac
            emulation-enable
          
          
            
            
          [ais-rate]
                                                                

                                                                6.   
      
          
            oam-pvc
            manage
          
          
            
            
          [frequency]
                                                                

                                                                7.   
      
          
            exit
          
        
                                                                

                                                                8.   
      
          
            interface
          
          
            typeslot/port
          
        
                                                                

                                                                9.   
      
          
            class-int
          
          
            
            
          
          
            vc-class-name
          
          
            
            
          
        
                                                                

                                                                10.   
      
          
            pvc
           
[name]
 vpi/vci l2transport
                                                                

                                                                11.   
      
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                

                                                                12.   
      
          
            end
          
        
                                                                


                                                              DETAILED STEPS
                                                                 Command or ActionPurpose
                                                                Step 1
          
            enable
          
        
                                                                 

                                                                Example:
                                                                
          
                                                                Router> enable
                                                                

        
                                                                
 
                                                                      		 
          
                                                                
Enables privileged EXEC mode. 
                                                                

          
                                                                • 
Enter your password if prompted.

                                                                  • 

                                                                

         
      
                                                                

                                                                Step 2
          
            configure
          
          
            terminal
          
        
                                                                 

                                                                Example:
                                                                
          
                                                                Router# configure terminal
                                                                

        
                                                                
 
                                                                      		 
          
                                                                
Enters global configuration mode.
                                                                

         
      
                                                                

                                                                Step 3
          
            vc-class
            atm
          
          
            name
          
        
                                                                 

                                                                Example:
                                                                
          
                                                                Router(config)# vc-class atm oamclass
                                                                

        
                                                                
 
                                                                      		 
          
                                                                
Creates a VC class and enters VC class configuration mode.
                                                                

         
      
                                                                

                                                                Step 4
          
            encapsulation
          
          
            
            
          
          
            layer-type
          
        
                                                                 

                                                                Example:
                                                                
          
                                                                Router(config-vc-class)# encapsulation aal5
                                                                

        
                                                                
 
                                                                      		 
          
                                                                
Configures the AAL and encapsulation type. 
                                                                

         
      
                                                                

                                                                Step 5
          
            oam-ac
            emulation-enable
          
          
            
            
          [ais-rate]
                                                                 

                                                                Example:
                                                                
          
                                                                Router(config-vc-class)# oam-ac emulation-enable 30
                                                                

        
                                                                
 
                                                                      		 
          
                                                                
Enables OAM cell emulation for AAL5 over MPLS. 
                                                                

          
                                                                • 
The ais-rate argument lets you specify the rate at which AIS cells are sent. The default is one cell every second. The range is 0 to 60 seconds.

                                                                  • 

                                                                

         
      
                                                                

                                                                Step 6
          
            oam-pvc
            manage
          
          
            
            
          [frequency]
                                                                 

                                                                Example:
                                                                
          
                                                                Router(config-vc-class)# oam-pvc manage
                                                                

        
                                                                
 
                                                                      		 
          
                                                                
Enables the PVC to generate end-to-end OAM loopback cells that verify connectivity on the virtual circuit.
                                                                

          
                                                                • 
The optional frequency argument is the interval between transmission of loopback cells and ranges from 0 to 600 seconds. The default value is 10 seconds. 

                                                                  • 

                                                                

         
      
                                                                

                                                                Step 7
          
            exit
          
        
                                                                 

                                                                Example:
                                                                
          
                                                                Router(config-vc-class)# exit
                                                                

        
                                                                
 
                                                                      		 
          
                                                                
Exits VC class configuration mode.
                                                                

         
      
                                                                

                                                                Step 8
          
            interface
          
          
            typeslot/port
          
        
                                                                 

                                                                Example:
                                                                
          
                                                                Router(config)# interface atm1/0
                                                                

        
                                                                
 
                                                                      		 
          
                                                                
Specifies the interface by type, slot, and port number, and enters interface configuration mode.
                                                                

         
      
                                                                

                                                                Step 9
          
            class-int
          
          
            
            
          
          
            vc-class-name
          
          
            
            
          
        
                                                                 

                                                                Example:
                                                                
          
                                                                Router(config-if)# class-int oamclass
                                                                

        
                                                                
 
                                                                      		 
          
                                                                
Applies a VC class to the ATM main interface or subinterface. 
                                                                

          
                                                                Note   
                
              
                                                                
You can also apply a VC class to a PVC. 
                                                                

                                                                

         
      
                                                                

                                                                Step 10
          
            pvc
           
[name]
 vpi/vci l2transport
                                                                 

                                                                Example:
                                                                
          
                                                                Router(config-if)# pvc 1/200 l2transport
                                                                

        
                                                                
 
                                                                      		 
          
                                                                
Creates or assigns a name to an ATM PVC and enters L2transport PVC configuration mode. 
                                                                

          
                                                                • 
The l2transport keyword indicates that the PVC is a switched PVC instead of a terminated PVC. 

                                                                  • 

                                                                

         
      
                                                                

                                                                Step 11
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                 

                                                                Example:
                                                                
          
                                                                Router(config-if-atm-l2trans-pvc)# xconnect 10.13.13.13 100 encapsulation mpls
                                                                

        
                                                                
 
                                                                      		 
          
                                                                
Binds the attachment circuit to a pseudowire VC. 
                                                                

         
      
                                                                

                                                                Step 12
          
            end
          
        
                                                                 

                                                                Example:
                                                                
          
                                                                Router(config-if-atm-l2trans-pvc)# end
                                                                

        
                                                                
 
                                                                      		 
          
                                                                
Exits L2transport PVC configuration mode and returns to privileged EXEC mode.
                                                                

         
      
                                                                

                                                                

                                                                

                                                                

                                                                

                                                                Configuring ATM Cell Relay over MPLS in VC Mode
                                                                

                                                                 
		
                                                                 Perform this task to configure ATM cell relay on the permanent virtual circuits. 
		
                                                                
 
	 
                                                                
SUMMARY STEPS
                                                                  1.   
       
			  
				enable 
			  
		  
                                                                  

                                                                  2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                  

                                                                  3.   
       
			  
				interface 
			  
			  
				atm 
			  
			  
				slot 
			 /port
		  
                                                                  

                                                                  4.   
       
			  
				pvc 
			  
			  
				vpi/vci 
			  
			  
				l2transport 
			  
		  
                                                                  

                                                                  5.   
       
			  
				encapsulation 
				aal0 
			  
		  
                                                                  

                                                                  6.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                                  

                                                                  7.   
       
			  
				exit 
			  
		  
                                                                  

                                                                  8.   
       
			  
				exit 
			  
		  
                                                                  

                                                                  9.   
       
			  
				exit 
			  
		  
                                                                  

                                                                  10.   
       
			  
				show 
				atm 
				vc 
			  
		  
                                                                  


                                                                DETAILED STEPS
                                                                   Command or ActionPurpose
                                                                  Step 1 
			  
				enable 
			  
		  
                                                                   

                                                                  Example:
                                                                   
			 
                                                                  Router> enable
                                                                  
 
		  
                                                                  
 
                                                                        		  
			 
                                                                   Enables privileged EXEC mode.
			 
                                                                  
 
			 
                                                                  •  Enter your password if prompted.
				

                                                                    • 

                                                                  
 
		   
      
                                                                  

                                                                  Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                   

                                                                  Example:
                                                                   
			 
                                                                  Router# configure terminal
                                                                  
 
		  
                                                                  
 
                                                                        		  
			 
                                                                   Enters global configuration mode.
			 
                                                                  
 
		   
      
                                                                  

                                                                  Step 3 
			  
				interface 
			  
			  
				atm 
			  
			  
				slot 
			 /port
		  
                                                                   

                                                                  Example:
                                                                   
			 
                                                                  Router(config)# interface atm1/0
                                                                  
 
		  
                                                                  
 
                                                                        		  
			 
                                                                   Specifies an ATM interface and enters interface configuration mode.
			 
                                                                  
 
		   
      
                                                                  

                                                                  Step 4 
			  
				pvc 
			  
			  
				vpi/vci 
			  
			  
				l2transport 
			  
		  
                                                                   

                                                                  Example:
                                                                   
			 
                                                                  Router(config-if)# pvc 0/100 l2transport
                                                                  
 
		  
                                                                  
 
                                                                        		  
			 
                                                                   Assigns a virtual path identifier (VPI) and virtual circuit identifier (VCI) and enters L2transport PVC configuration mode. 
			 
                                                                  
 
			 
                                                                  •  The 
				  l2transportkeyword indicates that the PVC is a switched PVC instead of a terminated PVC. 
				

                                                                    • 

                                                                  
 
		   
      
                                                                  

                                                                  Step 5 
			  
				encapsulation 
				aal0 
			  
		  
                                                                   

                                                                  Example:
                                                                   
			 
                                                                  Router(config-if-atm-l2trans-pvc)# encapsulation aal0
                                                                  
 
		  
                                                                  
 
                                                                        		  
			 
                                                                   For ATM cell relay, specifies raw cell encapsulation for the interface. 
			 
                                                                  
 
			 
                                                                  •  Make sure you specify the same encapsulation type on the PE and CE routers. 
				

                                                                    • 

                                                                  
 
		   
      
                                                                  

                                                                  Step 6 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                                   

                                                                  Example:
                                                                   
			 
                                                                  Router(config-if-atm-l2trans-pvc)# xconnect 10.13.13.13 100 encapsulation mpls
                                                                  
 
		  
                                                                  
 
                                                                        		  
			 
                                                                   Binds the attachment circuit to a pseudowire VC. 
			 
                                                                  
 
		   
      
                                                                  

                                                                  Step 7 
			  
				exit 
			  
		  
                                                                   

                                                                  Example:
                                                                   
			 
                                                                  Router(config-if-atm-l2trans-pvc)# exit
                                                                  
 
		  
                                                                  
 
                                                                        		  
			 
                                                                   Exits L2transport PVC configuration mode.
			 
                                                                  
 
		   
      
                                                                  

                                                                  Step 8 
			  
				exit 
			  
		  
                                                                   

                                                                  Example:
                                                                   
			 
                                                                  Router(config-if)# exit
                                                                  
 
		  
                                                                  
 
                                                                        		  
			 
                                                                   Exits interface configuration mode.
			 
                                                                  
 
		   
      
                                                                  

                                                                  Step 9 
			  
				exit 
			  
		  
                                                                   

                                                                  Example:
                                                                   
			 
                                                                  Router(config)# exit
                                                                  
 
		  
                                                                  
 
                                                                        		  
			 
                                                                   Exits global configuration mode.
			 
                                                                  
 
		   
      
                                                                  

                                                                  Step 10 
			  
				show 
				atm 
				vc 
			  
		  
                                                                   

                                                                  Example:
                                                                   
			 
                                                                  Router# show atm vc
                                                                  
 
		  
                                                                  
 
                                                                        		  
			 
                                                                   Verifies that OAM cell emulation is enabled on the ATM VC.
			 
                                                                  
 
		   
      
                                                                  

                                                                  

                                                                  Examples
                                                                  
		
		
                                                                   The output of the 
		  show 
			 atm 
			 vc command shows that the interface is configured for VC mode cell relay:
		
                                                                  

		
                                                                  Router# show atm vc 7
ATM3/0: VCD: 7, VPI: 23, VCI: 100
UBR, PeakRate: 149760
AAL0-Cell Relay, etype:0x10, Flags: 0x10000C2D, VCmode: 0x0
OAM Cell Emulation: not configured
InBytes: 0, OutBytes: 0
Status: UP
                                                                  

	 
                                                                  

                                                                  

                                                                  

                                                                  Configuring ATM Cell Relay over MPLS in VC Mode Using VC Class Configuration Mode
                                                                  

                                                                  
      
                                                                  
You can create a VC class that specifies the ATM cell relay encapsulation and then attach the VC class to an interface, subinterface, or VC. The following task creates a VC class that specifies the ATM cell relay encapsulation and attaches it to a main interface. 
                                                                  

      

                                                                  Note
                                                                  
You can configure VC class configuration mode only in VC mode. VC class configuration mode is not supported on VP or port mode. 
                                                                  

                                                                  

    
                                                                  
SUMMARY STEPS
                                                                    1.   
      
          
            enable
          
        
                                                                    

                                                                    2.   
      
          
            configure
          
          
            terminal
          
        
                                                                    

                                                                    3.   
      
          
            vc-class
            atm
          
          
            name
          
        
                                                                    

                                                                    4.   
      
          
            encapsulation
          
          
            
            
          
          
            layer-type
          
        
                                                                    

                                                                    5.   
      
          
            exit
          
        
                                                                    

                                                                    6.   
      
          
            interface
          
          
            typeslot
          /port
                                                                    

                                                                    7.   
      
          
            class-int
          
          
            
            
          
          
            vc-class-name
          
          
            
            
          
        
                                                                    

                                                                    8.   
      
          
            pvc
           
[name]
 vpi/vci l2transport
                                                                    

                                                                    9.   
      
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                    

                                                                    10.   
      
          
            end
          
        
                                                                    


                                                                  DETAILED STEPS
                                                                     Command or ActionPurpose
                                                                    Step 1
          
            enable
          
        
                                                                     

                                                                    Example:
                                                                    
          
                                                                    Router> enable
                                                                    

        
                                                                    
 
                                                                          		 
          
                                                                    
Enables privileged EXEC mode. 
                                                                    

          
                                                                    • 
Enter your password if prompted.

                                                                      • 

                                                                    

         
      
                                                                    

                                                                    Step 2
          
            configure
          
          
            terminal
          
        
                                                                     

                                                                    Example:
                                                                    
          
                                                                    Router# configure terminal
                                                                    

        
                                                                    
 
                                                                          		 
          
                                                                    
Enters global configuration mode.
                                                                    

         
      
                                                                    

                                                                    Step 3
          
            vc-class
            atm
          
          
            name
          
        
                                                                     

                                                                    Example:
                                                                    
          
                                                                    Router(config)# vc-class atm cellrelay
                                                                    

        
                                                                    
 
                                                                          		 
          
                                                                    
Creates a VC class and enters VC class configuration mode.
                                                                    

         
      
                                                                    

                                                                    Step 4
          
            encapsulation
          
          
            
            
          
          
            layer-type
          
        
                                                                     

                                                                    Example:
                                                                    
          
                                                                    Router(config-vc-class)# encapsulation aal0
                                                                    

        
                                                                    
 
                                                                          		 
          
                                                                    
Configures the AAL and encapsulation type. 
                                                                    

         
      
                                                                    

                                                                    Step 5
          
            exit
          
        
                                                                     

                                                                    Example:
                                                                    
          
                                                                    Router(config-vc-class)# exit
                                                                    

        
                                                                    
 
                                                                          		 
          
                                                                    
Exits VC class configuration mode.
                                                                    

         
      
                                                                    

                                                                    Step 6
          
            interface
          
          
            typeslot
          /port
                                                                     

                                                                    Example:
                                                                    
          
                                                                    Router(config)# interface atm1/0
                                                                    

        
                                                                    
 
                                                                          		 
          
                                                                    
Specifies the interface by type, slot, and port number, and enters interface configuration mode.
                                                                    

         
      
                                                                    

                                                                    Step 7
          
            class-int
          
          
            
            
          
          
            vc-class-name
          
          
            
            
          
        
                                                                     

                                                                    Example:
                                                                    
          
                                                                    Router(config-if)# class-int cellrelay
                                                                    

        
                                                                    
 
                                                                          		 
          
                                                                    
Applies a VC class to the ATM main interface or subinterface. 
                                                                    

          
                                                                    Note   
                
              
                                                                    
You can also apply a VC class to a PVC. 
                                                                    

                                                                    

         
      
                                                                    

                                                                    Step 8
          
            pvc
           
[name]
 vpi/vci l2transport
                                                                     

                                                                    Example:
                                                                    
          
                                                                    Router(config-if)# pvc 1/200 l2transport
                                                                    

        
                                                                    
 
                                                                          		 
          
                                                                    
Creates or assigns a name to an ATM PVC and enters L2transport PVC configuration mode. 
                                                                    

          
                                                                    • 
The l2transport keyword indicates that the PVC is a switched PVC instead of a terminated PVC.

                                                                      • 

                                                                    

         
      
                                                                    

                                                                    Step 9
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                     

                                                                    Example:
                                                                    
          
                                                                    Router(config-if-atm-l2trans-pvc)# xconnect 10.13.13.13 100 encapsulation mpls
                                                                    

        
                                                                    
 
                                                                          		 
          
                                                                    
Binds the attachment circuit to a pseudowire VC. 
                                                                    

         
      
                                                                    

                                                                    Step 10
          
            end
          
        
                                                                     

                                                                    Example:
                                                                    
          
                                                                    Router(config-if-atm-l2trans-pvc)# end
                                                                    

        
                                                                    
 
                                                                          		 
          
                                                                    
Exits L2transport PVC configuration mode and returns to privileged EXEC mode.
                                                                    

         
      
                                                                    

                                                                    

                                                                    

                                                                    

                                                                    Configuring ATM Cell Relay over MPLS in PVP Mode
                                                                    

                                                                     
		
                                                                     VP mode allows cells coming into a predefined PVP on the ATM interface to be transported over the MPLS backbone to a predefined PVP on the egress ATM interface. You can use VP mode to send single cells or packed cells over the MPLS backbone. 
		
                                                                    
 
		
                                                                     To configure VP mode, you must specify the following:
		
                                                                    
 
		
                                                                    •  The VP for transporting cell relay cells. 
		  

                                                                      • 

                                                                    •  The IP address of the peer PE router and the VC ID. 
		  

                                                                      • 

                                                                    
 
		
                                                                     When configuring ATM cell relay over MPLS in VP mode, use the following guidelines:
		
                                                                    
 
		
                                                                    •  You do not need to enter the 
			 encapsulation 
				aal0 command in VP mode. 
		  

                                                                      • 

                                                                    •  One ATM interface can accommodate multiple types of ATM connections. VP cell relay, VC cell relay, and ATM AAL5 over MPLS can coexist on one ATM interface. On the Cisco 12000 series router, this is true only on the engine 0 ATM line cards. 
		  

                                                                      • 

                                                                    •  If a VPI is configured for VP cell relay, you cannot configure a PVC using the same VPI.
		  

                                                                      • 

                                                                    •  VP trunking (mapping multiple VPs to one emulated VC label) is not supported. Each VP is mapped to one emulated VC.
		  

                                                                      • 

                                                                    •  Each VP is associated with one unique emulated VC ID. The AToM emulated VC type is ATM VP cell transport.
		  

                                                                      • 

                                                                    •  The AToM control word is supported. However, if a peer PE does not support the control word, it is disabled. This negotiation is done by LDP label binding.
		  

                                                                      • 

                                                                    •  VP mode (and VC mode) drop idle cells. 
		  

                                                                      • 

                                                                    
 
		
                                                                     Perform this task to configure ATM cell relay in PVP mode.
		
                                                                    
 
	 
                                                                    
SUMMARY STEPS
                                                                      1.   
       
			  
				enable 
			  
		  
                                                                      

                                                                      2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                      

                                                                      3.   
       
			  
				interface 
			  
			  
				atm 
			  
			  
				slot 
			 /port
		  
                                                                      

                                                                      4.   
       
			  
				atm 
				pvp 
			  
			  
				vpi 
			  
			  
				l2transport 
			  
		  
                                                                      

                                                                      5.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                                      

                                                                      6.   
       
			  
				exit 
			  
		  
                                                                      

                                                                      7.   
       
			  
				exit 
			  
		  
                                                                      

                                                                      8.   
       
			  
				exit 
			  
		  
                                                                      

                                                                      9.   
       
			  
				show 
				atm 
				vp 
			  
		  
                                                                      


                                                                    DETAILED STEPS
                                                                       Command or ActionPurpose
                                                                      Step 1 
			  
				enable 
			  
		  
                                                                       

                                                                      Example:
                                                                       
			 
                                                                      Router> enable
                                                                      
 
		  
                                                                      
 
                                                                            		  
			 
                                                                       Enables privileged EXEC mode. 
			 
                                                                      
 
			 
                                                                      •  Enter your password if prompted.
				

                                                                        • 

                                                                      
 
		   
      
                                                                      

                                                                      Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                       

                                                                      Example:
                                                                       
			 
                                                                      Router# configure terminal
                                                                      
 
		  
                                                                      
 
                                                                            		  
			 
                                                                       Enters global configuration mode.
			 
                                                                      
 
		   
      
                                                                      

                                                                      Step 3 
			  
				interface 
			  
			  
				atm 
			  
			  
				slot 
			 /port
		  
                                                                       

                                                                      Example:
                                                                       
			 
                                                                      Router(config)# interface atm1/0
                                                                      
 
		  
                                                                      
 
                                                                            		  
			 
                                                                       Defines the interface and enters interface configuration mode. 
			 
                                                                      
 
		   
      
                                                                      

                                                                      Step 4 
			  
				atm 
				pvp 
			  
			  
				vpi 
			  
			  
				l2transport 
			  
		  
                                                                       

                                                                      Example:
                                                                       
			 
                                                                      Router(config-if)# atm pvp 1 l2transport
                                                                      
 
		  
                                                                      
 
                                                                            		  
			 
                                                                       Specifies that the PVP is dedicated to transporting ATM cells and enters L2transport PVP configuration mode.
			 
                                                                      
 
			 
                                                                      •  The 
				  l2transport keyword indicates that the PVP is for cell relay. This mode is for Layer 2 transport only; it is not for regular PVPs.
				

                                                                        • 

                                                                      
 
		   
      
                                                                      

                                                                      Step 5 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                                       

                                                                      Example:
                                                                       
			 
                                                                      Router(config-if-atm-l2trans-pvp)# xconnect 10.0.0.1 123 encapsulation mpls 
                                                                      
 
		  
                                                                      
 
                                                                            		  
			 
                                                                       Binds the attachment circuit to a pseudowire VC. 
			 
                                                                      
 
			 
                                                                      •  The syntax for this command is the same as for all other Layer 2 transports. 
				

                                                                        • 

                                                                      
 
		   
      
                                                                      

                                                                      Step 6 
			  
				exit 
			  
		  
                                                                       

                                                                      Example:
                                                                       
			 
                                                                      Router(config-if-atm-l2trans-pvP)# exit
                                                                      
 
		  
                                                                      
 
                                                                            		  
			 
                                                                       Exits L2 transport PVP configuration mode.
			 
                                                                      
 
		   
      
                                                                      

                                                                      Step 7 
			  
				exit 
			  
		  
                                                                       

                                                                      Example:
                                                                       
			 
                                                                      Router(config-if)# exit
                                                                      
 
		  
                                                                      
 
                                                                            		  
			 
                                                                       Exits interface configuration mode.
			 
                                                                      
 
		   
      
                                                                      

                                                                      Step 8 
			  
				exit 
			  
		  
                                                                       

                                                                      Example:
                                                                       
			 
                                                                      Router(config)# exit
                                                                      
 
		  
                                                                      
 
                                                                            		  
			 
                                                                       Exits global configuration mode.
			 
                                                                      
 
		   
      
                                                                      

                                                                      Step 9 
			  
				show 
				atm 
				vp 
			  
		  
                                                                       

                                                                      Example:
                                                                       
			 
                                                                      Router# show atm vp
                                                                      
 
		  
                                                                      
 
                                                                            		  
			 
                                                                       Displays output that shows OAM cell emulation is enabled on the ATM VP.
			 
                                                                      
 
		   
      
                                                                      

                                                                      

                                                                      Examples
                                                                      
		
		
                                                                       The following 
			 show 
			 atm 
			 vp command in the following example shows that the interface is configured for VP mode cell relay:
		
                                                                      

		
                                                                      Router# show atm vp 1
ATM5/0  VPI: 1, Cell Relay, PeakRate: 149760, CesRate: 0, DataVCs: 1, CesVCs: 0, Status: ACTIVE
  VCD    VCI   Type   InPkts   OutPkts   AAL/Encap     Status
  6      3     PVC    0        0         F4 OAM        ACTIVE  
  7      4     PVC    0        0         F4 OAM        ACTIVE  
TotalInPkts: 0, TotalOutPkts: 0, TotalInFast: 0, TotalOutFast: 0,
TotalBroadcasts: 0 TotalInPktDrops: 0, TotalOutPktDrops: 0
                                                                      

	 
                                                                      

                                                                      

                                                                      

                                                                      Configuring ATM Cell Relay over MPLS in Port Mode
                                                                      

                                                                       
		
                                                                       Port mode cell relay allows cells coming into an ATM interface to be packed into an MPLS packet and transported over the MPLS backbone to an egress ATM interface.
		
                                                                      
 
		
                                                                       To configure port mode, issue the 
		  xconnect command from an ATM main interface and specify the destination address and the VC ID. The syntax of the 
		  xconnect command is the same as for all other transport types. Each ATM port is associated with one unique pseudowire VC label. 
		
                                                                      
 
		
                                                                       When configuring ATM cell relay over MPLS in port mode, use the following guidelines:
		
                                                                      
 
		
                                                                      •  The pseudowire VC type is set to ATM transparent cell transport (AAL0). 
		  

                                                                        • 

                                                                      •  The AToM control word is supported. However, if the peer PE does not support a control word, the control word is disabled. This negotiation is done by LDP label binding.
		  

                                                                        • 

                                                                      
 
		

                                                                      Note
                                                                       The AToM control word is not supported for port mode cell relay on Cisco 7600 series routers. 
		
                                                                      

                                                                      
 
		
                                                                      •  Port mode and VP and VC mode are mutually exclusive. If you enable an ATM main interface for cell relay, you cannot enter any PVP or PVC commands. 
		  

                                                                        • 

                                                                      •  If the pseudowire VC label is withdrawn due to an MPLS core network failure, the PE router sends a line AIS to the CE router. 
		  

                                                                        • 

                                                                      •  For the Cisco 7600 series routers, you must specify the interface ATM slot, bay, and port for the SIP400 or SIP200.
		  

                                                                        • 

                                                                      
 
	 
                                                                      
SUMMARY STEPS
                                                                        1.   
       
			  
				enable 
			  
		  
                                                                        

                                                                        2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                        

                                                                        3.   
       
			  
				interface 
			  
			  
				atm 
			  
			  
				slot 
			 /port
		  
                                                                        

                                                                        4.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                                        

                                                                        5.   
       
			  
				exit 
			  
		  
                                                                        

                                                                        6.   
       
			  
				exit 
			  
		  
                                                                        

                                                                        7.   
       
			  
				show 
				atm 
				route 
			  
		  
                                                                        

                                                                        8.   
       
			  
				show 
				mpls 
				l2transport 
				vc 
			  
		  
                                                                        


                                                                      DETAILED STEPS
                                                                         Command or ActionPurpose
                                                                        Step 1 
			  
				enable 
			  
		  
                                                                         

                                                                        Example:
                                                                         
			 
                                                                        Router> enable
                                                                        
 
		  
                                                                        
 
                                                                              		  
			 
                                                                         Enables privileged EXEC mode. 
			 
                                                                        
 
			 
                                                                        •  Enter your password if prompted.
				

                                                                          • 

                                                                        
 
		   
      
                                                                        

                                                                        Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                         

                                                                        Example:
                                                                         
			 
                                                                        Router# configure terminal
                                                                        
 
		  
                                                                        
 
                                                                              		  
			 
                                                                         Enters global configuration mode.
			 
                                                                        
 
		   
      
                                                                        

                                                                        Step 3 
			  
				interface 
			  
			  
				atm 
			  
			  
				slot 
			 /port
		  
                                                                         

                                                                        Example:
                                                                         
			 
                                                                        or interface atm slot/bay/port
                                                                        
 
		  
                                                                        
 

                                                                        Example:
                                                                         
			 
                                                                        Router(config)# interface atm1/0
                                                                        
 
		  
                                                                        
 

                                                                        Example:
                                                                         
			 
                                                                        or 
                                                                        
 
		  
                                                                        
 

                                                                        Example:
                                                                         
			 
                                                                        Router(config)# interface atm4/3/0 
                                                                        
 
		  
                                                                        
 
                                                                              		  
			 
                                                                         Specifies an ATM interface and enters interface configuration mode. 
			 
                                                                        
 
			 
                                                                        •  For the Cisco 7600 series routers, you must specify the interface ATM slot, bay, and port for the SIP400 or SIP200. In the example the slot is 4, the bay is 3, and the port is 0. 
				

                                                                          • 

                                                                        
 
		   
      
                                                                        

                                                                        Step 4 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                                         

                                                                        Example:
                                                                         
			 
                                                                        Router(config-if)# xconnect 10.0.0.1 123 encapsulation mpls
                                                                        
 
		  
                                                                        
 
                                                                              		  
			 
                                                                         Binds the attachment circuit to the interface. 
			 
                                                                        
 
		   
      
                                                                        

                                                                        Step 5 
			  
				exit 
			  
		  
                                                                         

                                                                        Example:
                                                                         
			 
                                                                        Router(config-if)# exit
                                                                        
 
		  
                                                                        
 
                                                                              		  
			 
                                                                         Exits interface configuration mode.
			 
                                                                        
 
		   
      
                                                                        

                                                                        Step 6 
			  
				exit 
			  
		  
                                                                         

                                                                        Example:
                                                                         
			 
                                                                        Router(config)# exit
                                                                        
 
		  
                                                                        
 
                                                                              		  
			 
                                                                         Exits global configuration mode.
			 
                                                                        
 
		   
      
                                                                        

                                                                        Step 7 
			  
				show 
				atm 
				route 
			  
		  
                                                                         

                                                                        Example:
                                                                         
			 
                                                                        Router# show atm route
                                                                        
 
		  
                                                                        
 
                                                                              		  
			 
                                                                         Displays output that shows ATM cell relay in port mode has been enabled.
			 
                                                                        
 
		   
      
                                                                        

                                                                        Step 8 
			  
				show 
				mpls 
				l2transport 
				vc 
			  
		  
                                                                         

                                                                        Example:
                                                                         
			 
                                                                        Router# show mpls l2transport vc
                                                                        
 
		  
                                                                        
 
                                                                              		  
			 
                                                                         Displays the attachment circuit and the interface.
			 
                                                                        
 
		   
      
                                                                        

                                                                        

                                                                        Examples
                                                                        
		
		
                                                                         The 
			 show 
			 atm 
			 route command in the following example displays port mode cell relay state. The following example shows that atm interface 1/0 is for cell relay, the VC ID is 123 and the tunnel is down.
		
                                                                        

		
                                                                        Router# show atm route
Input Intf        Output Intf     Output VC       Status
ATM1/0            ATOM Tunnel     123             DOWN

                                                                        
 
		
                                                                         The 
		  show 
			 mpls 
			 l2transport 
			 vc command in the following example also shows configuration information: 
		
                                                                        
 
		
                                                                        Router# show mpls l2transport vc
Local intf     Local circuit        Dest address    VC ID      Status    
-------------  -------------------- --------------- ---------- ----------
AT1/0          ATM CELL ATM1/0      10.1.1.121     1121       UP      

                                                                        
 
	 
                                                                        

                                                                        

                                                                        Troubleshooting Tips
                                                                        

                                                                        
The debug atm l2transport and debug mpls l2transport vcdisplay troubleshooting information. 
                                                                        

                                                                        

                                                                        

                                                                        

                                                                        Configuring ATM Single Cell Relay over MPLS
                                                                        

                                                                        
      
                                                                        
The single cell relay feature allows you to insert one ATM cell in each MPLS packet. You can use single cell relay in both VP and VC mode. The configuration steps show how to configure single cell relay in VC mode. For VP mode, see the Configuring ATM Cell Relay over MPLS in PVP Mode.
                                                                        

    
                                                                        
SUMMARY STEPS
                                                                          1.   
      
          
            enable
          
        
                                                                          

                                                                          2.   
      
          
            configure
          
          
            terminal
          
        
                                                                          

                                                                          3.   
      
          
            interface
          
          
            atm
          
          
            slot/port
          
        
                                                                          

                                                                          4.   
      
          
            pvc
          
          
            vpi/vci
          
          
            l2transport
          
        
                                                                          

                                                                          5.   
      
          
            encapsulation
            aal0
          
        
                                                                          

                                                                          6.   
      
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                          

                                                                          7.   
      
          
            end
          
        
                                                                          


                                                                        DETAILED STEPS
                                                                           Command or ActionPurpose
                                                                          Step 1
          
            enable
          
        
                                                                           

                                                                          Example:
                                                                          
          
                                                                          Router> enable
                                                                          

        
                                                                          
 
                                                                                		 
          
                                                                          
Enables privileged EXEC mode. 
                                                                          

          
                                                                          • 
Enter your password if prompted.

                                                                            • 

                                                                          

         
      
                                                                          

                                                                          Step 2
          
            configure
          
          
            terminal
          
        
                                                                           

                                                                          Example:
                                                                          
          
                                                                          Router# configure terminal
                                                                          

        
                                                                          
 
                                                                                		 
          
                                                                          
Enters global configuration mode.
                                                                          

         
      
                                                                          

                                                                          Step 3
          
            interface
          
          
            atm
          
          
            slot/port
          
        
                                                                           

                                                                          Example:
                                                                          
          
                                                                          Router(config)# interface atm1/0
                                                                          

        
                                                                          
 
                                                                                		 
          
                                                                          
Specifies an ATM interface and enters interface configuration mode.
                                                                          

         
      
                                                                          

                                                                          Step 4
          
            pvc
          
          
            vpi/vci
          
          
            l2transport
          
        
                                                                           

                                                                          Example:
                                                                          
          
                                                                          Router(config-if)# pvc 1/100 l2transport
                                                                          

        
                                                                          
 
                                                                                		 
          
                                                                          
Assigns a VPI and VCI and enters L2transport PVC configuration mode. 
                                                                          

          
                                                                          • 
The l2transport keyword indicates that the PVC is a switched PVC instead of a terminated PVC. 

                                                                            • 

                                                                          

         
      
                                                                          

                                                                          Step 5
          
            encapsulation
            aal0
          
        
                                                                           

                                                                          Example:
                                                                          
          
                                                                          Router(config-if-atm-l2trans-pvc)# encapsulation aal0
                                                                          

        
                                                                          
 
                                                                                		 
          
                                                                          
Specifies raw cell encapsulation for the interface. 
                                                                          

          
                                                                          • 
Make sure you specify the same encapsulation type on the PE and CE routers. 

                                                                            • 

                                                                          

         
      
                                                                          

                                                                          Step 6
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                           

                                                                          Example:
                                                                          
          
                                                                          Router(config-if-atm-l2trans-pvc)# xconnect 10.0.0.1 123 encapsulation mpls
                                                                          

        
                                                                          
 
                                                                                		 
          
                                                                          
Binds the attachment circuit to a pseudowire VC. 
                                                                          

         
      
                                                                          

                                                                          Step 7
          
            end
          
        
                                                                           

                                                                          Example:
                                                                          
          
                                                                          Router(config-if-atm-l2trans-pvc)# end
                                                                          

        
                                                                          
 
                                                                                		 
          
                                                                          
Exits L2transport PVC configuration mode and returns to privileged EXEC mode.
                                                                          

         
      
                                                                          

                                                                          

                                                                          

                                                                          

                                                                          Configuring ATM Packed Cell Relay over MPLS
                                                                          

                                                                          
The packed cell relay feature allows you to insert multiple concatenated ATM cells in an MPLS packet. The packed cell relay feature is more efficient than single cell relay, because each ATM cell is 52 bytes, and each AToM packet is at least 64 bytes. 
                                                                          

                                                                          
At a high level, packed cell relay configuration consists of the following steps:
                                                                          

                                                                          1. 
You specify the amount of time a PE router can wait for cells to be packed into an MPLS packet. You can set up three timers by default with different amounts of time attributed to each timer. 

                                                                            2. 

                                                                          2. 
You enable packed cell relay, specify how many cells should be packed into each MPLS packet, and choose which timer to use during the cell packing process. 

                                                                            3. 

                                                                          

                                                                          

                                                                          Restrictions
                                                                          

                                                                          • 
The cell-packingcommand is available only if you use AAL0 encapsulation in VC mode. If the command is configured with ATM AAL5 encapsulation, the command is not valid. 

                                                                            • 

                                                                          • 
Only cells from the same VC, VP, or port can be packed into one MPLS packet. Cells from different connections cannot be concatenated into the same MPLS packet. 

                                                                            • 

                                                                          • 
When you change, enable, or disable the cell-packing attributes, the ATM VC, VP, or port and the MPLS emulated VC are reestablished. 

                                                                            • 

                                                                          • 
If a PE router does not support packed cell relay, the PE router sends only one cell per MPLS packet.

                                                                            • 

                                                                          • 
The number of packed cells does not need to match between the PE routers. The two PE routers agree on the lower of the two values. For example, if PE1 is allowed to pack 10 cells per MPLS packet and PE2 is allowed to pack 20 cells per MPLS packet, the two PE routers would agree to send no more than 10 cells per packet. 

                                                                            • 

                                                                          • 
If the number of cells packed by the peer PE router exceeds the limit, the packet is dropped. 

                                                                            • 

                                                                          • 
Issue the atm mcpt-timerscommand on an ATM interface before issuing the cell-packingcommand. 

                                                                            • 

                                                                          

                                                                          
See the following sections for configuration information:
                                                                          

                                                                          

                                                                          

                                                                          Configuring ATM Packed Cell Relay over MPLS in VC Mode
                                                                          

                                                                          
      
                                                                          
Perform this task to configure the ATM packed cell relay over MPLS feature in VC mode. 
                                                                          

    
                                                                          
SUMMARY STEPS
                                                                            1.   
      
          
            enable
          
        
                                                                            

                                                                            2.   
      
          
            configure
          
          
            terminal
          
        
                                                                            

                                                                            3.   
      
          
            interface
          
          
            atm
          
          
            slot
          /port
                                                                            

                                                                            4.   
      
          
            shutdown
          
        
                                                                            

                                                                            5.   
      
          
            atm
            mcpt-timers
           [timer1-timeout timer2-timeout timer3-timeout]
                                                                            

                                                                            6.   
      
          
            no
            shutdown
          
        
                                                                            

                                                                            7.   
      
          
            pvc
          
          
            vpi/vci
          
          
            l2transport
          
        
                                                                            

                                                                            8.   
      
          
            encapsulation
            aal0
          
        
                                                                            

                                                                            9.   
      
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                            

                                                                            10.   
      
          
            cell-packing
          
          
            cells
          
          
            
            
            mcpt-timer
          
          
            timer
          
        
                                                                            

                                                                            11.   
      
          
            end
          
        
                                                                            


                                                                          DETAILED STEPS
                                                                             Command or ActionPurpose
                                                                            Step 1
          
            enable
          
        
                                                                             

                                                                            Example:
                                                                            
          
                                                                            Router> enable
                                                                            

        
                                                                            
 
                                                                                  		 
          
                                                                            
Enables privileged EXEC mode. 
                                                                            

          
                                                                            • 
Enter your password if prompted.

                                                                              • 

                                                                            

         
      
                                                                            

                                                                            Step 2
          
            configure
          
          
            terminal
          
        
                                                                             

                                                                            Example:
                                                                            
          
                                                                            Router# configure terminal
                                                                            

        
                                                                            
 
                                                                                  		 
          
                                                                            
Enters global configuration mode.
                                                                            

         
      
                                                                            

                                                                            Step 3
          
            interface
          
          
            atm
          
          
            slot
          /port
                                                                             

                                                                            Example:
                                                                            
          
                                                                            Router(config)# interface atm1/0
                                                                            

        
                                                                            
 
                                                                                  		 
          
                                                                            
Defines the interface and enters interface configuration mode.
                                                                            

         
      
                                                                            

                                                                            Step 4
          
            shutdown
          
        
                                                                             

                                                                            Example:
                                                                            
          
                                                                            Router(config-if)# shutdown
                                                                            

        
                                                                            
 
                                                                                  		 
          
                                                                            
Shuts down the interface.
                                                                            

         
      
                                                                            

                                                                            Step 5
          
            atm
            mcpt-timers
           [timer1-timeout timer2-timeout timer3-timeout]
                                                                             

                                                                            Example:
                                                                            
          
                                                                            Router(config-if)# atm mcpt-timers 100 200 250
                                                                            

        
                                                                            
 

                                                                            Example:
                                                                            
          
                                                                            

        
                                                                            
 
                                                                                  		 
          
                                                                            
Sets up the cell-packing timers, which specify how long the PE router can wait for cells to be packed into an MPLS packet.
                                                                            

          
                                                                            • 
You can set up to three timers. For each timer, you specify the maximum cell-packing timeout (MCPT). This value gives the cell-packing function a limited amount of time to complete. If the timer expires before the maximum number of cells are packed into an AToM packet, the packet is sent anyway. The timeout’s default and range of acceptable values depends on the ATM link speed. 

                                                                              • 

                                                                            • 
The respective default values for the PA-A3 port adapters are:
                                                                              • 
OC-3: 30, 60, and 90 microseconds
                                                                                • 

                                                                              • 
T3: 100, 200, and 300 microseconds
                                                                                • 

                                                                              • 
E3: 130, 260, and 390 microseconds
                                                                                • 

                                                                              

                                                                              

                                                                              • 

                                                                            • 
You can specify either the number of microseconds or use the default. 

                                                                              • 

                                                                            • 
The respective range of values for the PA-A3 port adapters are:
                                                                              • 
OC-3: 10 to 4095 microseconds
                                                                                • 

                                                                              • 
T3: 30 to 4095 microseconds
                                                                                • 

                                                                              • 
E3: 40 to 4095 microseconds
                                                                                • 

                                                                              

                                                                              

                                                                              • 

                                                                            

         
      
                                                                            

                                                                            Step 6
          
            no
            shutdown
          
        
                                                                             

                                                                            Example:
                                                                            
          
                                                                            Router(config-if)# no shutdown
                                                                            

        
                                                                            
 
                                                                                  		 
          
                                                                            
Enables the interface.
                                                                            

         
      
                                                                            

                                                                            Step 7
          
            pvc
          
          
            vpi/vci
          
          
            l2transport
          
        
                                                                             

                                                                            Example:
                                                                            
          
                                                                            Router(config-if)# pvc 1/100 l2transport
                                                                            

        
                                                                            
 
                                                                                  		 
          
                                                                            
Assigns a VPI and VCI and enters L2transport PVC configuration mode. 
                                                                            

          
                                                                            • 
The l2transport keyword indicates that the PVC is a switched PVC instead of a terminated PVC. 

                                                                              • 

                                                                            

         
      
                                                                            

                                                                            Step 8
          
            encapsulation
            aal0
          
        
                                                                             

                                                                            Example:
                                                                            
          
                                                                            Router(config-if-atm-l2trans-pvc)# encapsulation aal0
                                                                            

        
                                                                            
 
                                                                                  		 
          
                                                                            
Specifies raw cell encapsulation for the interface. 
                                                                            

          
                                                                            • 
Make sure you specify the same encapsulation type on the PE routers. 

                                                                              • 

                                                                            

         
      
                                                                            

                                                                            Step 9
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                             

                                                                            Example:
                                                                            
          
                                                                            Router(config-if-atm-l2trans-pvc)# xconnect 10.0.0.1 123 encapsulation mpls 
                                                                            

        
                                                                            
 
                                                                                  		 
          
                                                                            
Binds the attachment circuit to a pseudowire VC. 
                                                                            

         
      
                                                                            

                                                                            Step 10
          
            cell-packing
          
          
            cells
          
          
            
            
            mcpt-timer
          
          
            timer
          
        
                                                                             

                                                                            Example:
                                                                            
          
                                                                            Router(config-if-atm-l2trans-pvc)# cell-packing 10 mcpt-timer 1
                                                                            

        
                                                                            
 

                                                                            Example:
                                                                            
          
                                                                            

        
                                                                            
 
                                                                                  		 
          
                                                                            
Enables cell packing and specifies the cell-packing parameters.
                                                                            

          
                                                                            • 
The cellsargument represents the maximum number of cells to be packed into an MPLS packet. The range is from 2 to the MTU of the interface divided by 52. The default is MTU/52.

                                                                              • 

                                                                            • 
The timerargument allows you to specify which timer to use. The default is timer 1. 

                                                                              • 

                                                                            • 
See the cell-packing command page for more information. 

                                                                              • 

                                                                            

         
      
                                                                            

                                                                            Step 11
          
            end
          
        
                                                                             

                                                                            Example:
                                                                            
          
                                                                            Router(config-if-atm-l2trans-pvc)# end
                                                                            

        
                                                                            
 
                                                                                  		 
          
                                                                            
Exits L2transport PVC configuration mode and returns to privileged EXEC mode.
                                                                            

         
      
                                                                            

                                                                            

                                                                            

                                                                            

                                                                            Configuring ATM Packed Cell Relay over MPLS in VC Mode Using VC Class Configuration Mode
                                                                            

                                                                            
      
                                                                            
You can create a VC class that specifies the ATM cell relay encapsulation and the cell packing parameters and then attach the VC class to an interface, subinterface, or VC. The following task creates a VC class that specifies the ATM cell relay encapsulation and cell packing and attaches it to a main interface. 
                                                                            

      

                                                                            Note
                                                                            
You can configure VC class configuration mode only in VC mode. VC class configuration mode is not supported on VP or port mode. 
                                                                            

                                                                            

      
                                                                            
When you configure cell packing in VC class configuration mode and then apply the VC class to an interface, the settings in the VC class apply to all the VCs on the interface, unless you specify a different cell packing value at a lower level, such as the subinterface or VC level. For example, you can create a VC class that specifies three cells to be packed. You can apply the VC class to an interface. Then, for one PVC, you can specify two cells to be packed. All the PVCs on the interface pack three cells, except for the one PVC that was set to set two cells. 
                                                                            

    
                                                                            
SUMMARY STEPS
                                                                              1.   
      
          
            enable
          
        
                                                                              

                                                                              2.   
      
          
            configure
          
          
            terminal
          
        
                                                                              

                                                                              3.   
      
          
            vc-class
            atm
          
          
            name
          
        
                                                                              

                                                                              4.   
      
          
            encapsulation
          
          
            
            
          
          
            layer-type
          
        
                                                                              

                                                                              5.   
      
          
            cell-packing
          
          
            cells
          
          
            mcpt-timer
          
          
            timer
          
        
                                                                              

                                                                              6.   
      
          
            exit
          
        
                                                                              

                                                                              7.   
      
          
            interface
          
          
            typeslot
          /port
                                                                              

                                                                              8.   
      
          
            shutdown
          
        
                                                                              

                                                                              9.   
      
          
            atm
            mcpt-timers
           [timer1-timeout timer2-timeout timer3-timeout]
                                                                              

                                                                              10.   
      
          
            no
            shutdown
          
        
                                                                              

                                                                              11.   
      
          
            class-int
          
          
            
            
          
          
            vc-class-name
          
          
            
            
          
        
                                                                              

                                                                              12.   
      
          
            pvc
           
[name]
 vpi/vci l2transport
                                                                              

                                                                              13.   
      
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                              

                                                                              14.   
      
          
            end
          
        
                                                                              


                                                                            DETAILED STEPS
                                                                               Command or ActionPurpose
                                                                              Step 1
          
            enable
          
        
                                                                               

                                                                              Example:
                                                                              
          
                                                                              Router> enable
                                                                              

        
                                                                              
 
                                                                                    		 
          
                                                                              
Enables privileged EXEC mode. 
                                                                              

          
                                                                              • 
Enter your password if prompted.

                                                                                • 

                                                                              

         
      
                                                                              

                                                                              Step 2
          
            configure
          
          
            terminal
          
        
                                                                               

                                                                              Example:
                                                                              
          
                                                                              Router# configure terminal
                                                                              

        
                                                                              
 
                                                                                    		 
          
                                                                              
Enters global configuration mode.
                                                                              

         
      
                                                                              

                                                                              Step 3
          
            vc-class
            atm
          
          
            name
          
        
                                                                               

                                                                              Example:
                                                                              
          
                                                                              Router(config)# vc-class atm cellpacking
                                                                              

        
                                                                              
 
                                                                                    		 
          
                                                                              
Creates a VC class and enters VC class configuration mode.
                                                                              

         
      
                                                                              

                                                                              Step 4
          
            encapsulation
          
          
            
            
          
          
            layer-type
          
        
                                                                               

                                                                              Example:
                                                                              
          
                                                                              Router(config-vc-class)# encapsulation aal0
                                                                              

        
                                                                              
 
                                                                                    		 
          
                                                                              
Configures the AAL and encapsulation type. 
                                                                              

         
      
                                                                              

                                                                              Step 5
          
            cell-packing
          
          
            cells
          
          
            mcpt-timer
          
          
            timer
          
        
                                                                               

                                                                              Example:
                                                                              
          
                                                                              Router(config-vc-class)# cell-packing 10 mcpt-timer 1
                                                                              

        
                                                                              
 

                                                                              Example:
                                                                              
          
                                                                              

        
                                                                              
 
                                                                                    		 
          
                                                                              
Enables cell packing and specifies the cell-packing parameters.
                                                                              

          
                                                                              • 
The cellsargument represents the maximum number of cells to be packed into an MPLS packet. The range is from 2 to the MTU of the interface divided by 52. The default is MTU/52.

                                                                                • 

                                                                              • 
The timerargument allows you to specify which timer to use. The default is timer 1. 

                                                                                • 

                                                                              • 
See the cell-packing command page for more information. 

                                                                                • 

                                                                              

         
      
                                                                              

                                                                              Step 6
          
            exit
          
        
                                                                               

                                                                              Example:
                                                                              
          
                                                                              Router(config-vc-class)# exit
                                                                              

        
                                                                              
 
                                                                                    		 
          
                                                                              
Exits VC class configuration mode.
                                                                              

         
      
                                                                              

                                                                              Step 7
          
            interface
          
          
            typeslot
          /port
                                                                               

                                                                              Example:
                                                                              
          
                                                                              Router(config)# interface atm1/0
                                                                              

        
                                                                              
 
                                                                                    		 
          
                                                                              
Specifies the interface by type, slot, and port number, and enters interface configuration mode.
                                                                              

         
      
                                                                              

                                                                              Step 8
          
            shutdown
          
        
                                                                               

                                                                              Example:
                                                                              
          
                                                                              Router(config-if)# shutdown
                                                                              

        
                                                                              
 
                                                                                    		 
          
                                                                              
Shuts down the interface.
                                                                              

         
      
                                                                              

                                                                              Step 9
          
            atm
            mcpt-timers
           [timer1-timeout timer2-timeout timer3-timeout]
                                                                               

                                                                              Example:
                                                                              
          
                                                                              Router(config-if)# atm mcpt-timers 100 200 250
                                                                              

        
                                                                              
 

                                                                              Example:
                                                                              
          
                                                                              

        
                                                                              
 
                                                                                    		 
          
                                                                              
Sets up the cell-packing timers, which specify how long the PE router can wait for cells to be packed into an MPLS packet.
                                                                              

          
                                                                              • 
You can set up to three timers. For each timer, you specify the MCPT. This value gives the cell-packing function a limited amount of time to complete. If the timer expires before the maximum number of cells are packed into an AToM packet, the packet is sent anyway. The timeout’s default and range of acceptable values depends on the ATM link speed. 

                                                                                • 

                                                                              • 
The respective default values for the PA-A3 port adapters are:
                                                                                • 
OC-3: 30, 60, and 90 microseconds
                                                                                  • 

                                                                                • 
T3: 100, 200, and 300 microseconds
                                                                                  • 

                                                                                • 
E3: 130, 260, and 390 microseconds
                                                                                  • 

                                                                                

                                                                                

                                                                                • 

                                                                              • 
You can specify either the number of microseconds or use the default. 

                                                                                • 

                                                                              • 
The respective range of values for the PA-A3 port adapters are:
                                                                                • 
OC-3: 10 to 4095 microseconds
                                                                                  • 

                                                                                • 
T3: 30 to 4095 microseconds
                                                                                  • 

                                                                                • 
E3: 40 to 4095 microseconds
                                                                                  • 

                                                                                

                                                                                

                                                                                • 

                                                                              

         
      
                                                                              

                                                                              Step 10
          
            no
            shutdown
          
        
                                                                               

                                                                              Example:
                                                                              
          
                                                                              Router(config-if)# no shutdown
                                                                              

        
                                                                              
 
                                                                                    		 
          
                                                                              
Enables the interface.
                                                                              

         
      
                                                                              

                                                                              Step 11
          
            class-int
          
          
            
            
          
          
            vc-class-name
          
          
            
            
          
        
                                                                               

                                                                              Example:
                                                                              
          
                                                                              Router(config-if)# class-int cellpacking
                                                                              

        
                                                                              
 
                                                                                    		 
          
                                                                              
Applies a VC class to the ATM main interface or subinterface. 
                                                                              

          
                                                                              Note   
                
              
                                                                              
You can also apply a VC class to a PVC. 
                                                                              

                                                                              

         
      
                                                                              

                                                                              Step 12
          
            pvc
           
[name]
 vpi/vci l2transport
                                                                               

                                                                              Example:
                                                                              
          
                                                                              Router(config-if)# pvc 1/200 l2transport
                                                                              

        
                                                                              
 
                                                                                    		 
          
                                                                              
Creates or assigns a name to an ATM PVC and enters L2transport PVC configuration mode.
                                                                              

          
                                                                              • 
The l2transport keyword indicates that the PVC is a switched PVC instead of a terminated PVC. 

                                                                                • 

                                                                              

         
      
                                                                              

                                                                              Step 13
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                               

                                                                              Example:
                                                                              
          
                                                                              Router(config-if-atm-l2trans-pvc)# xconnect 10.13.13.13 100 encapsulation mpls
                                                                              

        
                                                                              
 
                                                                                    		 
          
                                                                              
Binds the attachment circuit to a pseudowire VC. 
                                                                              

         
      
                                                                              

                                                                              Step 14
          
            end
          
        
                                                                               

                                                                              Example:
                                                                              
          
                                                                              Router(config-if-atm-l2trans-pvc)# end
                                                                              

        
                                                                              
 
                                                                                    		 
          
                                                                              
Exits L2transport PVC configuration mode and returns to privileged EXEC mode.
                                                                              

         
      
                                                                              

                                                                              

                                                                              

                                                                              

                                                                              Configuring ATM Packed Cell Relay over MPLS in VP Mode
                                                                              

                                                                              
      
                                                                              
Perform this task to configure the ATM cell-packing feature in VP mode. 
                                                                              

    
                                                                              
SUMMARY STEPS
                                                                                1.   
      
          
            enable
          
        
                                                                                

                                                                                2.   
      
          
            configure
          
          
            terminal
          
        
                                                                                

                                                                                3.   
      
          
            interface
          
          
            atm
          
          
            slot
          /port
                                                                                

                                                                                4.   
      
          
            shutdown
          
        
                                                                                

                                                                                5.   
      
          
            atm
            mcpt-timers
           [timer1-timeout timer2-timeout timer3-timeout]
                                                                                

                                                                                6.   
      
          
            no
            shutdown
          
        
                                                                                

                                                                                7.   
      
          
            atm
            pvp
          
          
            vpi
          
          
            
            
          
          
            l2transport
          
        
                                                                                

                                                                                8.   
      
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                                

                                                                                9.   
      
          
            cell-packing
          
          
            cells
          
          
            mcpt-timer
          
          
            timer
          
        
                                                                                

                                                                                10.   
      
          
            end
          
        
                                                                                


                                                                              DETAILED STEPS
                                                                                 Command or ActionPurpose
                                                                                Step 1
          
            enable
          
        
                                                                                 

                                                                                Example:
                                                                                
          
                                                                                Router> enable
                                                                                

        
                                                                                
 
                                                                                      		 
          
                                                                                
Enables privileged EXEC mode. 
                                                                                

          
                                                                                • 
Enter your password if prompted.

                                                                                  • 

                                                                                

         
      
                                                                                

                                                                                Step 2
          
            configure
          
          
            terminal
          
        
                                                                                 

                                                                                Example:
                                                                                
          
                                                                                Router# configure terminal
                                                                                

        
                                                                                
 
                                                                                      		 
          
                                                                                
Enters global configuration mode.
                                                                                

         
      
                                                                                

                                                                                Step 3
          
            interface
          
          
            atm
          
          
            slot
          /port
                                                                                 

                                                                                Example:
                                                                                
          
                                                                                Router(config)# interface atm1/0
                                                                                

        
                                                                                
 
                                                                                      		 
          
                                                                                
Defines the interface and enters interface configuration mode. 
                                                                                

         
      
                                                                                

                                                                                Step 4
          
            shutdown
          
        
                                                                                 

                                                                                Example:
                                                                                
          
                                                                                Router(config-if)# shutdown
                                                                                

        
                                                                                
 
                                                                                      		 
          
                                                                                
Shuts down the interface.
                                                                                

         
      
                                                                                

                                                                                Step 5
          
            atm
            mcpt-timers
           [timer1-timeout timer2-timeout timer3-timeout]
                                                                                 

                                                                                Example:
                                                                                
          
                                                                                Router(config-if)# atm mcpt-timers 100 200 250
                                                                                

        
                                                                                
 

                                                                                Example:
                                                                                
          
                                                                                

        
                                                                                
 
                                                                                      		 
          
                                                                                
Sets up the cell-packing timers, which specify how long the PE router can wait for cells to be packed into an MPLS packet.
                                                                                

          
                                                                                • 
You can set up to three timers. For each timer, you specify the MCPT. This value gives the cell-packing function a limited amount of time to complete. If the timer expires before the maximum number of cells are packed into an AToM packet, the packet is sent anyway. The timeout’s default and range of acceptable values depends on the ATM link speed. 

                                                                                  • 

                                                                                • 
The respective default values for the PA-A3 port adapters are:
                                                                                  • 
OC-3: 30, 60, and 90 microseconds
                                                                                    • 

                                                                                  • 
T3: 100, 200, and 300 microseconds
                                                                                    • 

                                                                                  • 
E3: 130, 260, and 390 microseconds
                                                                                    • 

                                                                                  

                                                                                  

                                                                                  • 

                                                                                • 
You can specify either the number of microseconds or use the default. 

                                                                                  • 

                                                                                • 
The respective range of values for the PA-A3 port adapters are:
                                                                                  • 
OC-3: 10 to 4095 microseconds
                                                                                    • 

                                                                                  • 
T3: 30 to 4095 microseconds
                                                                                    • 

                                                                                  • 
E3: 40 to 4095 microseconds
                                                                                    • 

                                                                                  

                                                                                  

                                                                                  • 

                                                                                

         
      
                                                                                

                                                                                Step 6
          
            no
            shutdown
          
        
                                                                                 

                                                                                Example:
                                                                                
          
                                                                                Router(config-if)# no shutdown
                                                                                

        
                                                                                
 
                                                                                      		 
          
                                                                                
Enables the interface.
                                                                                

         
      
                                                                                

                                                                                Step 7
          
            atm
            pvp
          
          
            vpi
          
          
            
            
          
          
            l2transport
          
        
                                                                                 

                                                                                Example:
                                                                                
          
                                                                                Router(config-if)# atm pvp 1 l2transport
                                                                                

        
                                                                                
 
                                                                                      		 
          
                                                                                
Specifies that the PVP is dedicated to transporting ATM cells and enters L2transport PVP configuration mode. 
                                                                                

          
                                                                                • 
The l2transport keyword indicates that the PVP is for cell relay. This mode is for Layer 2 transport only; it is not for regular PVPs.

                                                                                  • 

                                                                                

         
      
                                                                                

                                                                                Step 8
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                                 

                                                                                Example:
                                                                                
          
                                                                                Router(cfg-if-atm-l2trans-pvp)# xconnect 10.0.0.1 123 encapsulation mpls 
                                                                                

        
                                                                                
 
                                                                                      		 
          
                                                                                
Binds the attachment circuit to a pseudowire VC. 
                                                                                

          
                                                                                • 
The syntax for this command is the same as for all other 
Layer 2 transports. 

                                                                                  • 

                                                                                

         
      
                                                                                

                                                                                Step 9
          
            cell-packing
          
          
            cells
          
          
            mcpt-timer
          
          
            timer
          
        
                                                                                 

                                                                                Example:
                                                                                
          
                                                                                Router(cfg-if-atm-l2trans-pvp)# cell-packing 10 mcpt-timer 1
                                                                                

        
                                                                                
 

                                                                                Example:
                                                                                
          
                                                                                

        
                                                                                
 
                                                                                      		 
          
                                                                                
Enables cell packing and specifies the cell-packing parameters.
                                                                                

          
                                                                                • 
The cellsargument represents the maximum number of cells to be packed into an MPLS packet. The range is from 2 to the MTU of the interface divided by 52. The default is MTU/52.

                                                                                  • 

                                                                                • 
The timerargument allows you to specify which timer to use. The default is timer 1. 

                                                                                  • 

                                                                                • 
See the cell-packing command page for more information. 

                                                                                  • 

                                                                                

         
      
                                                                                

                                                                                Step 10
          
            end
          
        
                                                                                 

                                                                                Example:
                                                                                
          
                                                                                Router(config-if-atm-l2trans-pvc)# end
                                                                                

        
                                                                                
 
                                                                                      		 
          
                                                                                
Exits L2transport PVC configuration mode and returns to privileged EXEC mode.
                                                                                

         
      
                                                                                

                                                                                

                                                                                

                                                                                

                                                                                Configuring ATM Packed Cell Relay over MPLS in Port Mode
                                                                                

                                                                                 
		
                                                                                 Perform this task to configure ATM packed cell relay over MPLS in port mode. 
		
                                                                                
 
	 
                                                                                
SUMMARY STEPS
                                                                                  1.   
       
			  
				enable 
			  
		  
                                                                                  

                                                                                  2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                                  

                                                                                  3.   
       
			  
				interface 
			  
			  
				atm 
			  
			  
				slot 
			 /port
		  
                                                                                  

                                                                                  4.   
       
			  
				shutdown 
			  
		  
                                                                                  

                                                                                  5.   
       
			  
				atm 
				mcpt-timers 
			 [timer1-timeout 
				timer2-timeout 
				timer3-timeout]
		  
                                                                                  

                                                                                  6.   
       
			  
				no 
				shutdown 
			  
		  
                                                                                  

                                                                                  7.   
       
			  
				cell-packing 
			  
			  
				cells 
			  
			  
				mcpt-timer 
			  
			  
				timer 
			  
		  
                                                                                  

                                                                                  8.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                                                  

                                                                                  9.   
       
			  
				exit 
			  
		  
                                                                                  

                                                                                  10.   
       
			  
				exit 
			  
		  
                                                                                  

                                                                                  11.   
       
			  
				show 
				atm 
				cell-packing 
			  
		  
                                                                                  

                                                                                  12.   
       
			  
				show 
				atm 
				vp 
			  
		  
                                                                                  


                                                                                DETAILED STEPS
                                                                                   Command or ActionPurpose
                                                                                  Step 1 
			  
				enable 
			  
		  
                                                                                   

                                                                                  Example:
                                                                                   
			 
                                                                                  Router> enable
                                                                                  
 
		  
                                                                                  
 
                                                                                        		  
			 
                                                                                   Enables privileged EXEC mode. 
			 
                                                                                  
 
			 
                                                                                  •  Enter your password if prompted.
				

                                                                                    • 

                                                                                  
 
		   
      
                                                                                  

                                                                                  Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                                   

                                                                                  Example:
                                                                                   
			 
                                                                                  Router# configure terminal
                                                                                  
 
		  
                                                                                  
 
                                                                                        		  
			 
                                                                                   Enters global configuration mode.
			 
                                                                                  
 
		   
      
                                                                                  

                                                                                  Step 3 
			  
				interface 
			  
			  
				atm 
			  
			  
				slot 
			 /port
		  
                                                                                   

                                                                                  Example:
                                                                                   
			 
                                                                                  Router(config)# interface atm1/0
                                                                                  
 
		  
                                                                                  
 
                                                                                        		  
			 
                                                                                   Specifies an ATM interface and enters interface configuration mode. 
			 
                                                                                  
 
		   
      
                                                                                  

                                                                                  Step 4 
			  
				shutdown 
			  
		  
                                                                                   

                                                                                  Example:
                                                                                   
			 
                                                                                  Router(config-if)# shutdown
                                                                                  
 
		  
                                                                                  
 
                                                                                        		  
			 
                                                                                   Shuts down the interface.
			 
                                                                                  
 
		   
      
                                                                                  

                                                                                  Step 5 
			  
				atm 
				mcpt-timers 
			 [timer1-timeout 
				timer2-timeout 
				timer3-timeout]
		  
                                                                                   

                                                                                  Example:
                                                                                   
			 
                                                                                  Router(config-if)# atm mcpt-timers 100 200 250
                                                                                  
 
		  
                                                                                  
 
                                                                                        		  
			 
                                                                                   Sets up the cell-packing timers, which specify how long the PE router can wait for cells to be packed into an MPLS packet.
			 
                                                                                  
 
			 
                                                                                  •  You can set up to three timers. For each timer, you specify the MCPT. This value gives the cell-packing function a limited amount of time to complete. If the timer expires before the maximum number of cells are packed into an AToM packet, the packet is sent anyway. The timeout’s default and range of acceptable values depends on the ATM link speed. 
				

                                                                                    • 

                                                                                  •  The respective default values for the PA-A3 port adapters are:
				  
                                                                                    •  OC-3: 30, 60, and 90 microseconds
					 
                                                                                      • 

                                                                                    •  T3: 100, 200, and 300 microseconds
					 
                                                                                      • 

                                                                                    •  E3: 130, 260, and 390 microseconds
					 
                                                                                      • 

                                                                                    

				
                                                                                    

                                                                                    • 

                                                                                  •  You can specify either the number of microseconds or use the default. 
				

                                                                                    • 

                                                                                  •  The respective range of values for the PA-A3 port adapters are:
				  
                                                                                    •  OC-3: 10 to 4095 microseconds
					 
                                                                                      • 

                                                                                    •  T3: 30 to 4095 microseconds
					 
                                                                                      • 

                                                                                    •  E3: 40 to 4095 microseconds
					 
                                                                                      • 

                                                                                    

				
                                                                                    

                                                                                    • 

                                                                                  
 
		   
      
                                                                                  

                                                                                  Step 6 
			  
				no 
				shutdown 
			  
		  
                                                                                   

                                                                                  Example:
                                                                                   
			 
                                                                                  Router(config-if)# no shutdown
                                                                                  
 
		  
                                                                                  
 
                                                                                        		  
			 
                                                                                   Enables the interface.
			 
                                                                                  
 
		   
      
                                                                                  

                                                                                  Step 7 
			  
				cell-packing 
			  
			  
				cells 
			  
			  
				mcpt-timer 
			  
			  
				timer 
			  
		  
                                                                                   

                                                                                  Example:
                                                                                   
			 
                                                                                  Router(config-if)# cell-packing 10 mcpt-timer 1
                                                                                  
 
		  
                                                                                  
 

                                                                                  Example:
                                                                                   
			 
                                                                                  
 
		  
                                                                                  
 
                                                                                        		  
			 
                                                                                   Enables cell packing and specifies the cell-packing parameters.
			 
                                                                                  
 
			 
                                                                                  •  The 
				  cellsargument represents the maximum number of cells to be packed into an MPLS packet. The range is from 2 to the MTU of the interface divided by 52. The default is MTU/52.
				

                                                                                    • 

                                                                                  •  The 
				  timerargument allows you to specify which timer to use. The default is timer 1. 
				

                                                                                    • 

                                                                                  •  See the cell-packing command page for more information. 
				

                                                                                    • 

                                                                                  
 
		   
      
                                                                                  

                                                                                  Step 8 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                                                   

                                                                                  Example:
                                                                                   
			 
                                                                                  Router(config-if)# xconnect 10.0.0.1 123 encapsulation mpls
                                                                                  
 
		  
                                                                                  
 
                                                                                        		  
			 
                                                                                   Binds the attachment circuit to the interface. 
			 
                                                                                  
 
		   
      
                                                                                  

                                                                                  Step 9 
			  
				exit 
			  
		  
                                                                                   

                                                                                  Example:
                                                                                   
			 
                                                                                  Router(config-if)# exit
                                                                                  
 
		  
                                                                                  
 
                                                                                        		  
			 
                                                                                   Exits interface configuration mode. 
			 
                                                                                  
 
		   
      
                                                                                  

                                                                                  Step 10 
			  
				exit 
			  
		  
                                                                                   

                                                                                  Example:
                                                                                   
			 
                                                                                  Router(config)# exit
                                                                                  
 
		  
                                                                                  
 
                                                                                        		  
			 
                                                                                   Exits global configuration mode.
			 
                                                                                  
 
		   
      
                                                                                  

                                                                                  Step 11 
			  
				show 
				atm 
				cell-packing 
			  
		  
                                                                                   

                                                                                  Example:
                                                                                   
			 
                                                                                  Router# show atm cell-packing
                                                                                  
 
		  
                                                                                  
 
                                                                                        		  
			 
                                                                                   Displays cell-packing statistics.
			 
                                                                                  
 
		   
      
                                                                                  

                                                                                  Step 12 
			  
				show 
				atm 
				vp 
			  
		  
                                                                                   

                                                                                  Example:
                                                                                   
			 
                                                                                  Router# show atm vp
                                                                                  
 
		  
                                                                                  
 
                                                                                        		  
			 
                                                                                   Displays cell-packing information. 
			 
                                                                                  
 
		   
      
                                                                                  

                                                                                  

                                                                                  Examples
                                                                                  
		
		
                                                                                   The 
		  show 
			 atm 
			 cell-packing command in the following example displays the following statistics:
		
                                                                                  

		
                                                                                  •  The number of cells that are to be packed into an MPLS packet on the local and peer routers
		  

                                                                                    • 

                                                                                  •  The average number of cells sent and received
		  

                                                                                    • 

                                                                                  •  The timer values associated with the local router 
		  

                                                                                    • 

                                                                                  
 
		
                                                                                  Router# show atm cell-packing
                         average                 average 
        circuit  local  nbr of cells    peer    nbr of cells    MCPT
        type     MNCP   rcvd in one pkt MNCP    sent in one pkt (us)
==============================================================================
atm 1/0 vc 1/200  20    15              30              20       60      
atm 1/0 vp 2      25    21              30              24      100

                                                                                  
 
		
                                                                                   The 
		  show 
			 atm 
			 vp command in the following example displays the cell packing information at the end of the output:
		
                                                                                  
 
		
                                                                                  Router# show atm vp 12
ATM5/0  VPI: 12, Cell Relay, PeakRate: 149760, CesRate: 0, DataVCs: 1, CesVCs: 0, Status: ACTIVE
  VCD    VCI   Type   InPkts   OutPkts   AAL/Encap     Status
  6      3     PVC    0        0         F4 OAM        ACTIVE  
  7      4     PVC    0        0         F4 OAM        ACTIVE  
TotalInPkts: 0, TotalOutPkts: 0, TotalInFast: 0, TotalOutFast: 0,
TotalBroadcasts: 0 TotalInPktDrops: 0, TotalOutPktDrops: 0
Local MNCP: 5, average number of cells received: 3
Peer MNCP: 1, average number of cells sent: 1
Local MCPT: 100 us
                                                                                  

	 
                                                                                  

                                                                                  

                                                                                  

                                                                                  Troubleshooting Tips
                                                                                  

                                                                                  
To debug ATM cell packing, issue the debug atm cell-packing command.
                                                                                  

                                                                                  

                                                                                  

                                                                                  

                                                                                  Configuring Ethernet over MPLS in VLAN Mode
                                                                                  

                                                                                  
      
                                                                                  
A VLAN is a switched network that is logically segmented by functions, project teams, or applications regardless of the physical location of users. Ethernet over MPLS allows you to connect two VLAN networks that are in different locations. You configure the PE routers at each end of the MPLS backbone and add a point-to-point VC. Only the two PE routers at the ingress and egress points of the MPLS backbone know about the VCs dedicated to transporting Layer 2 VLAN traffic. All other routers do not have table entries for those VCs. Ethernet over MPLS in VLAN mode transports Ethernet traffic from a source 802.1Q VLAN to a destination 802.1Q VLAN over a core MPLS network.
                                                                                  

      

                                                                                  Note
                                                                                  
You must configure Ethernet over MPLS (VLAN mode) on the subinterfaces.
                                                                                  

                                                                                  

    
                                                                                  
SUMMARY STEPS
                                                                                    1.   
      
          
            enable
          
        
                                                                                    

                                                                                    2.   
      
          
            configure
          
          
            terminal
          
        
                                                                                    

                                                                                    3.   
      
          
            interface
          
          
            gigabitethernet
          
          
            slot
          /interface.subinterface
                                                                                    

                                                                                    4.   
      
          
            encapsulation
            dot1q
          
          
            vlan-id
          
        
                                                                                    

                                                                                    5.   
      
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                                    

                                                                                    6.   
      
          
            end
          
        
                                                                                    


                                                                                  DETAILED STEPS
                                                                                     Command or ActionPurpose
                                                                                    Step 1
          
            enable
          
        
                                                                                     

                                                                                    Example:
                                                                                    
          
                                                                                    Router> enable
                                                                                    

        
                                                                                    
 
                                                                                          		 
          
                                                                                    
Enables privileged EXEC mode. 
                                                                                    

          
                                                                                    • 
Enter your password if prompted.

                                                                                      • 

                                                                                    

         
      
                                                                                    

                                                                                    Step 2
          
            configure
          
          
            terminal
          
        
                                                                                     

                                                                                    Example:
                                                                                    
          
                                                                                    Router# configure terminal
                                                                                    

        
                                                                                    
 
                                                                                          		 
          
                                                                                    
Enters global configuration mode.
                                                                                    

         
      
                                                                                    

                                                                                    Step 3
          
            interface
          
          
            gigabitethernet
          
          
            slot
          /interface.subinterface
                                                                                     

                                                                                    Example:
                                                                                    
          
                                                                                    Router(config)# interface gigabitethernet4/0.1
                                                                                    

        
                                                                                    
 
                                                                                          		 
          
                                                                                    
Specifies the Gigabit Ethernet subinterface and enters subinterface configuration mode. 
                                                                                    

          
                                                                                    • 
Make sure the subinterface on the adjoining CE router is on the same VLAN as this PE router. 

                                                                                      • 

                                                                                    

         
      
                                                                                    

                                                                                    Step 4
          
            encapsulation
            dot1q
          
          
            vlan-id
          
        
                                                                                     

                                                                                    Example:
                                                                                    
          
                                                                                    Router(config-subif)# encapsulation dot1q 100
                                                                                    

        
                                                                                    
 
                                                                                          		 
          
                                                                                    
Enables the subinterface to accept 802.1Q VLAN packets.   
                                                                                    

          
                                                                                    • 
The subinterfaces between the CE and PE routers that are running Ethernet over MPLS must be in the same subnet. All other subinterfaces and backbone routers do not. 

                                                                                      • 

                                                                                    

         
      
                                                                                    

                                                                                    Step 5
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                                     

                                                                                    Example:
                                                                                    
          
                                                                                    Router(config-subif)# xconnect 10.0.0.1 123 encapsulation mpls
                                                                                    

        
                                                                                    
 
                                                                                          		 
          
                                                                                    
Binds the attachment circuit to a pseudowire VC. 
                                                                                    

          
                                                                                    • 
The syntax for this command is the same as for all other Layer 2 transports. 

                                                                                      • 

                                                                                    

         
      
                                                                                    

                                                                                    Step 6
          
            end
          
        
                                                                                     

                                                                                    Example:
                                                                                    
          
                                                                                    Router(config-if-atm-l2trans-pvc)# end
                                                                                    

        
                                                                                    
 
                                                                                          		 
          
                                                                                    
Exits L2transport PVC configuration mode and returns to privileged EXEC mode.
                                                                                    

         
      
                                                                                    

                                                                                    

                                                                                    

                                                                                    

                                                                                    Configuring Ethernet over MPLS in Port Mode
                                                                                    

                                                                                     
		
                                                                                     Port mode allows a frame coming into an interface to be packed into an MPLS packet and transported over the MPLS backbone to an egress interface. The entire Ethernet frame without the preamble or FCS is transported as a single packet. To configure port mode, use the 
		  xconnect command in interface configuration mode and specify the destination address and the VC ID. The syntax of the 
		  xconnect command is the same as for all other transport types. Each interface is associated with one unique pseudowire VC label.
		
                                                                                    
 
		
                                                                                     When configuring Ethernet over MPLS in port mode, use the following guidelines:
		
                                                                                    
 
		
                                                                                    •  The pseudowire VC type is set to Ethernet. 
		  

                                                                                      • 

                                                                                    •  Port mode and Ethernet VLAN mode are mutually exclusive. If you enable a main interface for port-to-port transport, you cannot also enter commands on a subinterface.
		  

                                                                                      • 

                                                                                    •  In Cisco IOS Release 12.2(33)SRE and later releases, L2VPN Routed Interworking using Ethernet over MPLS (EOMPLS) is no longer supported. When you configure the 
			 interworking 
				ip command in pseudowire configuration mode, the 
			 xconnect command is disabled. To configure L2VPN Routed Interworking, use either Ethernet over MPLS (EOMPLS) or SVI (Switched Virtual Interface) based EOMPLS.
		  

                                                                                      • 

                                                                                    
 
	 
                                                                                    
SUMMARY STEPS
                                                                                      1.   
       
			  
				enable 
			  
		  
                                                                                      

                                                                                      2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                                      

                                                                                      3.   
       
			  
				interface 
			  
			  
				gigabitethernet 
			  
			  
				slot/interface 
			  
		  
                                                                                      

                                                                                      4.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                                                      

                                                                                      5.   
       
			  
				exit 
			  
		  
                                                                                      

                                                                                      6.   
       
			  
				exit 
			  
		  
                                                                                      

                                                                                      7.   
       
			  
				show 
				mpls 
				l2transport 
				vc 
			  
		  
                                                                                      


                                                                                    DETAILED STEPS
                                                                                       Command or ActionPurpose
                                                                                      Step 1 
			  
				enable 
			  
		  
                                                                                       

                                                                                      Example:
                                                                                       
			 
                                                                                      Router> enable
                                                                                      
 
		  
                                                                                      
 
                                                                                            		  
			 
                                                                                       Enables privileged EXEC mode. 
			 
                                                                                      
 
			 
                                                                                      •  Enter your password if prompted.
				

                                                                                        • 

                                                                                      
 
		   
      
                                                                                      

                                                                                      Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                                       

                                                                                      Example:
                                                                                       
			 
                                                                                      Router# configure terminal
                                                                                      
 
		  
                                                                                      
 
                                                                                            		  
			 
                                                                                       Enters global configuration mode.
			 
                                                                                      
 
		   
      
                                                                                      

                                                                                      Step 3 
			  
				interface 
			  
			  
				gigabitethernet 
			  
			  
				slot/interface 
			  
		  
                                                                                       

                                                                                      Example:
                                                                                       
			 
                                                                                      Router(config)# interface gigabitethernet4/0
                                                                                      
 
		  
                                                                                      
 
                                                                                            		  
			 
                                                                                       Specifies the Gigabit Ethernet interface and enters interface configuration mode. 
			 
                                                                                      
 
			 
                                                                                      •  Make sure the interface on the adjoining CE router is on the same VLAN as this PE router.
				

                                                                                        • 

                                                                                      
 
		   
      
                                                                                      

                                                                                      Step 4 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                                                       

                                                                                      Example:
                                                                                       
			 
                                                                                      Router(config-if)# xconnect 10.0.0.1 123 encapsulation mpls
                                                                                      
 
		  
                                                                                      
 
                                                                                            		  
			 
                                                                                       Binds the attachment circuit to a pseudowire VC. 
			 
                                                                                      
 
			 
                                                                                      •  The syntax for this command is the same as for all other Layer 2 transports. 
				

                                                                                        • 

                                                                                      
 
		   
      
                                                                                      

                                                                                      Step 5 
			  
				exit 
			  
		  
                                                                                       

                                                                                      Example:
                                                                                       
			 
                                                                                      Router(config-if)# exit
                                                                                      
 
		  
                                                                                      
 
                                                                                            		  
			 
                                                                                       Exits interface configuration mode.
			 
                                                                                      
 
		   
      
                                                                                      

                                                                                      Step 6 
			  
				exit 
			  
		  
                                                                                       

                                                                                      Example:
                                                                                       
			 
                                                                                      Router(config)# exit
                                                                                      
 
		  
                                                                                      
 
                                                                                            		  
			 
                                                                                       Exits router configuration mode.
			 
                                                                                      
 
		   
      
                                                                                      

                                                                                      Step 7 
			  
				show 
				mpls 
				l2transport 
				vc 
			  
		  
                                                                                       

                                                                                      Example:
                                                                                       
			 
                                                                                      Router# show mpls l2transport vc
                                                                                      
 
		  
                                                                                      
 
                                                                                            		  
			 
                                                                                       Displays information about Ethernet over MPLS port mode. 
			 
                                                                                      
 
		   
      
                                                                                      

                                                                                      

                                                                                      Examples
                                                                                      
		
		
                                                                                       In the following example, the output of the 
		  show 
			 mpls 
			 l2transport 
			 vc 
			 detailcommand is displayed: 
		
                                                                                      

		
                                                                                      Router# show mpls l2transport vc detail
Local interface: Gi4/0.1 up, line protocol up, Eth VLAN 2 up
Destination address: 10.1.1.1, VC ID: 2, VC status: up
.
.
.
Local interface: Gi8/0/1 up, line protocol up, Ethernet up
  Destination address: 10.1.1.1, VC ID: 8, VC status: up
                                                                                      

	 
                                                                                      

                                                                                      

                                                                                      

                                                                                      Configuring Ethernet over MPLS with VLAN ID Rewrite
                                                                                      

                                                                                      
The VLAN ID rewrite feature enables you to use VLAN interfaces with different VLAN IDs at both ends of the tunnel.
                                                                                      

                                                                                      
The Cisco 12000 series router requires you to configure VLAN ID rewrite manually, as described in the following sections.
                                                                                      

                                                                                      
The following routers automatically perform VLAN ID rewrite on the disposition PE router. No configuration is required:
                                                                                      

                                                                                      • 
Cisco 7200 series routers.

                                                                                        • 

                                                                                      • 
Cisco 7500 series routers.

                                                                                        • 

                                                                                      • 
Cisco 10720 series routers.

                                                                                        • 

                                                                                      • 
Routers supported on Cisco IOS Release 12.4(11)T. (Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS software image support.)

                                                                                        • 

                                                                                      

                                                                                      
The following sections explain how to configure the VLAN ID rewrite feature:
                                                                                      

                                                                                      

                                                                                      

                                                                                      Configuring Ethernet over MPLS with VLAN ID Rewrite for Cisco 12k    Routers for 12.0(29)S and Earlier Releases
                                                                                      

                                                                                       Use the following guidelines for the VLAN ID rewrite feature for the
		Cisco 12000 series routers in Cisco IOS releases earlier than 12.0(29)S:
	 
                                                                                      

                                                                                      •  The IP Service Engine (ISE)
		  4-port Gigabit Ethernet line card performs the VLAN ID rewrite on the
		  disposition side at the edge-facing line card. 
		

                                                                                        • 

                                                                                      •  The engine 2 3-port Gigabit
		  Ethernet line card performs the VLAN ID rewrite on the imposition side at the
		  edge-facing line card. 
		

                                                                                        • 

                                                                                      

                                                                                       The VLAN ID rewrite functionality requires that both ends of the
		Ethernet over MPLS connections be provisioned with the same line cards. Make
		sure that both edge-facing ends of the virtual circuit use either the engine 2
		or ISE Ethernet line card. The following example shows the system flow with the
		VLAN ID rewrite feature: 
	 
                                                                                      

                                                                                      •  The ISE 4-port Gigabit
		  Ethernet line card:
		

                                                                                        • 

                                                                                      

                                                                                       Traffic flows from VLAN1 on CE1 to VLAN2 on CE2. As the frame reaches
		the edge-facing line card of the disposition router PE2, the VLAN ID in the
		dot1Q header changes to the VLAN ID assigned to VLAN2. 
	 
                                                                                      

                                                                                      •  The engine 2 3-port Gigabit
		  Ethernet line card:
		

                                                                                        • 

                                                                                      

                                                                                       Traffic flows from VLAN1 on CE1 to VLAN2 on CE2. As the frame reaches
		the edge-facing line card of the imposition router PE1, the VLAN ID in the
		dot1Q header changes to the VLAN ID assigned to VLAN2. 
	 
                                                                                      

                                                                                       For the Cisco 12000 series router engine 2 3-port Gigabit Ethernet line
		card, you must issue the remote circuit id command as part of the Ethernet over MPLS VLAN ID
		rewrite configuration.
	 
                                                                                      

                                                                                      

                                                                                      

                                                                                      Configuring Ethernet over MPLS with VLAN ID Rewrite for Cisco 12k Routers for 12.0(30)S and Later Releases
                                                                                      

                                                                                       
		
                                                                                       In Cisco IOS Release 12.0(30)S, the following changes to VLAN ID rewrite were implemented: 
		
                                                                                      
 
		
                                                                                      •  The ISE 4-port Gigabit Ethernet line card can perform VLAN ID rewrite at both the imposition and disposition sides of the edge-facing router. 
		  

                                                                                        • 

                                                                                      •  The 
			 remote 
				circuit 
				id command is not required as part of the Ethernet over MPLS VLAN ID rewrite configuration, as long as both PE routers are running Cisco IOS Release 12.0(30)S. The VLAN ID rewrite feature is implemented automatically when you configure Ethernet over MPLS. 
		  

                                                                                        • 

                                                                                      •  The VLAN ID rewrite feature in Cisco IOS Release 12.0(30)S can interoperate with routers that are running earlier releases. If you have a PE router at one end of the circuit that is using an earlier Cisco IOS release and the 
				remote 
				circuit 
				idcommand, the other PE can run Cisco IOS Release 12.0(30)S and still perform VLAN ID rewrite. 
		  

                                                                                        • 

                                                                                      •  You can mix the line cards on the PE routers, as shown in the following table 
		  

                                                                                        • 

                                                                                      
 
		

                                                                                      Table 6 Supported Line Cards for VLAN ID Rewrite Feature:
                                                                                       
				  
                                                                                       If PE1 Has These Line Cards 
				  
                                                                                      
 
				                                                                                      		
 
				  
                                                                                       Then PE2 Can Use These Line Cards 
				  
                                                                                      
 
				                                                                                      		

                                                                                      
                                                                                      

                                                                                       
				  
                                                                                       Engine 2 3-port Gigabit Ethernet line card or ISE 4-port Gigabit Ethernet line card 
				  
                                                                                      
 
				                                                                                      		
 
				  
                                                                                       Engine 2 3-port Gigabit Ethernet line card or ISE 4-port Gigabit Ethernet line card 
				  
                                                                                      
 
				                                                                                      		

                                                                                      

                                                                                       
				  
                                                                                       ISE 4-port Gigabit Ethernet line card 
				  
                                                                                      
 
				                                                                                      		
 
				  
                                                                                       Any Cisco 12000 series router line card 
				  
                                                                                      
 
				                                                                                      		

                                                                                      
                                                                                      

                                                                                      

                                                                                      
 
	 
                                                                                      
SUMMARY STEPS
                                                                                        1.   
       
			  
				enable 
			  
		  
                                                                                        

                                                                                        2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                                        

                                                                                        3.   
       
			  
				interface 
			  
			  
				gigabitethernet 
			  
			  
				slot 
			 /interface.subinterface
		  
                                                                                        

                                                                                        4.   
       
			  
				encapsulation 
				dot1q 
			  
			  
				vlan-id 
			  
		  
                                                                                        

                                                                                        5.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                                                        

                                                                                        6.   
       
			  
				remote 
				circuit 
				id 
			  
			  
				remote-vlan-id 
			  
		  
                                                                                        

                                                                                        7.   
       
			  
				exit 
			  
		  
                                                                                        

                                                                                        8.   
       
			  
				exit 
			  
		  
                                                                                        

                                                                                        9.   
       
			  
				exit 
			  
		  
                                                                                        

                                                                                        10.   
       
			  
				show 
				controllers 
				eompls 
				forwarding-table 
			  
		  
                                                                                        


                                                                                      DETAILED STEPS
                                                                                         Command or ActionPurpose
                                                                                        Step 1 
			  
				enable 
			  
		  
                                                                                         

                                                                                        Example:
                                                                                         
			 
                                                                                        Router> enable
                                                                                        
 
		  
                                                                                        
 
                                                                                              		  
			 
                                                                                         Enables privileged EXEC mode. 
			 
                                                                                        
 
			 
                                                                                        •  Enter your password if prompted. 
				

                                                                                          • 

                                                                                        
 
		   
      
                                                                                        

                                                                                        Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                                         

                                                                                        Example:
                                                                                         
			 
                                                                                        Router# configure terminal
                                                                                        
 
		  
                                                                                        
 
                                                                                              		  
			 
                                                                                         Enters global configuration mode. 
			 
                                                                                        
 
		   
      
                                                                                        

                                                                                        Step 3 
			  
				interface 
			  
			  
				gigabitethernet 
			  
			  
				slot 
			 /interface.subinterface
		  
                                                                                         

                                                                                        Example:
                                                                                         
			 
                                                                                        Router(config)# interface gigabitethernet4/0.1
                                                                                        
 
		  
                                                                                        
 
                                                                                              		  
			 
                                                                                         Specifies the Gigabit Ethernet subinterface and enters subinterface configuration mode. 
			 
                                                                                        
 
			 
                                                                                        •  Make sure the subinterfaces between the CE and PE routers that are running Ethernet over MPLS are in the same subnet. All other subinterfaces and backbone routers do not need to be in the same subnet. 
				

                                                                                          • 

                                                                                        
 
		   
      
                                                                                        

                                                                                        Step 4 
			  
				encapsulation 
				dot1q 
			  
			  
				vlan-id 
			  
		  
                                                                                         

                                                                                        Example:
                                                                                         
			 
                                                                                        Router(config-subif)# encapsulation dot1q 100
                                                                                        
 
		  
                                                                                        
 
                                                                                              		  
			 
                                                                                         Enables the subinterface to accept 802.1Q VLAN packets. 
			 
                                                                                        
 
			 
                                                                                        •  Make sure the subinterface on the adjoining CE router is on the same VLAN as this PE router. 
				

                                                                                          • 

                                                                                        
 
		   
      
                                                                                        

                                                                                        Step 5 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                                                         

                                                                                        Example:
                                                                                         
			 
                                                                                        Router(config-subif)# xconnect 10.0.0.1 123 encapsulation mpls
                                                                                        
 
		  
                                                                                        
 
                                                                                              		  
			 
                                                                                         Binds the attachment circuit to a pseudowire VC and enters xconnect configuration mode. 
			 
                                                                                        
 
			 
                                                                                        •  The syntax for this command is the same as for all other Layer 2 transports. 
				

                                                                                          • 

                                                                                        
 
		   
      
                                                                                        

                                                                                        Step 6 
			  
				remote 
				circuit 
				id 
			  
			  
				remote-vlan-id 
			  
		  
                                                                                         

                                                                                        Example:
                                                                                         
			 
                                                                                        Router(config-subif-xconn)# remote circuit id 101
                                                                                        
 
		  
                                                                                        
 
                                                                                              		  
			 
                                                                                         Enables you to use VLAN interfaces with different VLAN IDs at both ends of the tunnel. 
			 
                                                                                        
 
			 
                                                                                        •  This command is required only for the Cisco 12000 series router engine 2 3-port Gigabit Ethernet line card. 
				

                                                                                          • 

                                                                                        
 
		   
      
                                                                                        

                                                                                        Step 7 
			  
				exit 
			  
		  
                                                                                         

                                                                                        Example:
                                                                                         
			 
                                                                                        Router(config-subif-xconn)# exit
                                                                                        
 
		  
                                                                                        
 
                                                                                              		  
			 
                                                                                         Exits xconnect configuration mode. 
			 
                                                                                        
 
		   
      
                                                                                        

                                                                                        Step 8 
			  
				exit 
			  
		  
                                                                                         

                                                                                        Example:
                                                                                         
			 
                                                                                        Router(config-subif)# exit
                                                                                        
 
		  
                                                                                        
 
                                                                                              		  
			 
                                                                                         Exits subinterface configuration mode. 
			 
                                                                                        
 
		   
      
                                                                                        

                                                                                        Step 9 
			  
				exit 
			  
		  
                                                                                         

                                                                                        Example:
                                                                                         
			 
                                                                                        Router(config)# exit
                                                                                        
 
		  
                                                                                        
 
                                                                                              		  
			 
                                                                                         Exits global configuration mode. 
			 
                                                                                        
 
		   
      
                                                                                        

                                                                                        Step 10 
			  
				show 
				controllers 
				eompls 
				forwarding-table 
			  
		  
                                                                                         

                                                                                        Example:
                                                                                         
			 
                                                                                        Router# execute slot 0 show controllers eompls forwarding-table
                                                                                        
 
		  
                                                                                        
 
                                                                                              		  
			 
                                                                                         Displays information about VLAN ID rewrite. 
			 
                                                                                        
 
		   
      
                                                                                        

                                                                                        

                                                                                        Examples
                                                                                        
		
		
                                                                                         The command output of the 
		  show 
			 controllers 
			 eompls 
			 forwarding-tablecommand in the following example shows VLAN ID rewrite configured on the Cisco 12000 series routers with an engine 2 3-port Gigabit Ethernet line card. In the following example, the bolded command output show the VLAN ID rewrite information.
		
                                                                                        

		
		
                                                                                        Router# execute slot 0 show controllers eompls forwarding-table 0 2
Port # 0, VLAN-ID # 2, Table-index 2
EoMPLS configured: 1
tag_rew_ptr             = D001BB58
Leaf entry?     = 1
FCR index       = 20
           **tagrew_psa_addr    = 0006ED60
           **tagrew_vir_addr    = 7006ED60
           **tagrew_phy_addr    = F006ED60
        [0-7] loq 8800 mtu 4458  oq 4000 ai 3 oi 04019110 (encaps size 4)
        cw-size 4 vlanid-rew 3
        gather A30 (bufhdr size 32 EoMPLS (Control Word) Imposition profile 81)
        2 tag: 18 18
        counters 1182, 10 reported 1182, 10.
    Local OutputQ (Unicast):    Slot:2  Port:0  RED queue:0  COS queue:0
    Output Q (Unicast):         Port:0          RED queue:0  COS queue:0
                                                                                        

		
		
                                                                                        Router# execute slot 0 show controllers eompls forwarding-table 0 3
 
Port # 0, VLAN-ID # 3, Table-index 3
EoMPLS configured: 1
tag_rew_ptr             = D0027B90
Leaf entry?     = 1
FCR index       = 20
           **tagrew_psa_addr    = 0009EE40
           **tagrew_vir_addr    = 7009EE40
           **tagrew_phy_addr    = F009EE40
        [0-7] loq 9400 mtu 4458  oq 4000 ai 8 oi 84000002 (encaps size 4)
        cw-size 4 vlanid-rew 2
        gather A30 (bufhdr size 32 EoMPLS (Control Word) Imposition profile 81)
        2 tag: 17 18
        counters 1182, 10 reported 1182, 10.
    Local OutputQ (Unicast):    Slot:5  Port:0  RED queue:0  COS queue:0
    Output Q (Unicast):         Port:0          RED queue:0  COS queue:0
                                                                                        

	 
                                                                                        

                                                                                        

                                                                                        

                                                                                        Configuring per-Subinterface MTU for Ethernet over MPLS
                                                                                        

                                                                                        SUMMARY STEPS
                                                                                          1.   
      
          
            enable
          
        
                                                                                          

                                                                                          2.   
      
          
            configure
          
          
            terminal
          
        
                                                                                          

                                                                                          3.   
      
          
            interface
            gigabitethernet
          
          
            slot
          
          
            /
          
          
            subslot
          
          
            /
          
          
            port
          [. subinterface]
                                                                                          

                                                                                          4.   
      
          
            mtu
          
          
            mtu-value
          
        
                                                                                          

                                                                                          5.   
      
          
            interface
            gigabitethernet
          
          
            slot
          
          
            /
          
          
            subslot
          
          
            /
          
          
            port
          [. subinterface]
                                                                                          

                                                                                          6.   
      
          
            encapsulation
            dot1q
          
          
            vlan-id
          
        
                                                                                          

                                                                                          7.   
      
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                                          

                                                                                          8.   
      
          
            mtu
          
          
            mtu-value
          
        
                                                                                          

                                                                                          9.   
      
          
            end
          
        
                                                                                          

                                                                                          10.   
      
          
            show
            mpls
            l2transport
            binding
          
        
                                                                                          


                                                                                        DETAILED STEPS
                                                                                           Command or ActionPurpose
                                                                                          Step 1
          
            enable
          
        
                                                                                           

                                                                                          Example:
                                                                                          
          
                                                                                          Router> enable
                                                                                          

        
                                                                                          
 
                                                                                                		 
          
                                                                                          
Enables privileged EXEC mode. 
                                                                                          

          
                                                                                          • 
Enter your password if prompted.

                                                                                            • 

                                                                                          

         
      
                                                                                          

                                                                                          Step 2
          
            configure
          
          
            terminal
          
        
                                                                                           

                                                                                          Example:
                                                                                          
          
                                                                                          Router# configure terminal
                                                                                          

        
                                                                                          
 
                                                                                                		 
          
                                                                                          
Enters global configuration mode.
                                                                                          

         
      
                                                                                          

                                                                                          Step 3
          
            interface
            gigabitethernet
          
          
            slot
          
          
            /
          
          
            subslot
          
          
            /
          
          
            port
          [. subinterface]
                                                                                           

                                                                                          Example:
                                                                                          
          
                                                                                          Router(config)# interface gigabitethernet4/0/0
                                                                                          

        
                                                                                          
 
                                                                                                		 
          
                                                                                          
Specifies the Gigabit Ethernet interface and enters interface configuration mode. 
                                                                                          

         
      
                                                                                          

                                                                                          Step 4
          
            mtu
          
          
            mtu-value
          
        
                                                                                           

                                                                                          Example:
                                                                                          
          
                                                                                          Router(config-if)# mtu 2000
                                                                                          

        
                                                                                          
 
                                                                                                		 
          
                                                                                          
Specifies the MTU value for the interface. The MTU value specified at the interface level can be inherited by a subinterface.
                                                                                          

         
      
                                                                                          

                                                                                          Step 5
          
            interface
            gigabitethernet
          
          
            slot
          
          
            /
          
          
            subslot
          
          
            /
          
          
            port
          [. subinterface]
                                                                                           

                                                                                          Example:
                                                                                          
          
                                                                                          Router(config-if)# interface gigabitethernet4/0/0.1
                                                                                          

        
                                                                                          
 
                                                                                                		 
          
                                                                                          
Specifies the Gigabit Ethernet subinterface and enters subinterface configuration mode.
                                                                                          

          
                                                                                          
Make sure the subinterface on the adjoining CE router is on the same VLAN as this PE router. 
                                                                                          

         
      
                                                                                          

                                                                                          Step 6
          
            encapsulation
            dot1q
          
          
            vlan-id
          
        
                                                                                           

                                                                                          Example:
                                                                                          
          
                                                                                          Router(config-subif)# encapsulation dot1q 100
                                                                                          

        
                                                                                          
 
                                                                                                		 
          
                                                                                          
Enables the subinterface to accept 802.1Q VLAN packets.   
                                                                                          

          
                                                                                          
The subinterfaces between the CE and PE routers that are running Ethernet over MPLS must be in the same subnet. All other subinterfaces and backbone routers need not be. 
                                                                                          

         
      
                                                                                          

                                                                                          Step 7
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                                           

                                                                                          Example:
                                                                                          
          
                                                                                          Router(config-subif)# xconnect 10.0.0.1 123 encapsulation mpls
                                                                                          

        
                                                                                          
 
                                                                                                		 
          
                                                                                          
Binds the attachment circuit to a pseudowire VC.
                                                                                          

          
                                                                                          
The syntax for this command is the same as for all other Layer 2 transports. Enters xconnect subinterface configuration mode.
                                                                                          

         
      
                                                                                          

                                                                                          Step 8
          
            mtu
          
          
            mtu-value
          
        
                                                                                           

                                                                                          Example:
                                                                                          
          
                                                                                          Router(config-if-xconn)# mtu 1400
                                                                                          

        
                                                                                          
 
                                                                                                		 
          
                                                                                          
Specifies the MTU for the VC. 
                                                                                          

         
      
                                                                                          

                                                                                          Step 9
          
            end
          
        
                                                                                           

                                                                                          Example:
                                                                                          
          
                                                                                          Router(config-if-xconn)# end
                                                                                          

        
                                                                                          
 
                                                                                                		 
          
                                                                                          
Exits to privileged EXEC mode. 
                                                                                          

         
      
                                                                                          

                                                                                          Step 10
          
            show
            mpls
            l2transport
            binding
          
        
                                                                                           

                                                                                          Example:
                                                                                          
          
                                                                                          Router# show mpls l2transport binding
                                                                                          

        
                                                                                          
 
                                                                                                		 
          
                                                                                          
Displays the MTU values assigned to the local and remote interfaces. 
                                                                                          

         
      
                                                                                          

                                                                                          

                                                                                          

                                                                                          

                                                                                          Configuring Frame Relay over MPLS with DLCI-to-DLCI Connections
                                                                                          

                                                                                           
		
                                                                                           Frame Relay over MPLS encapsulates Frame Relay PDUs in MPLS packets and forwards them across the MPLS network. For Frame Relay, you can set up data-link connection identifier (DLCI)-to-DLCI connections or port-to-port connections. With DLCI-to-DLCI connections, the PE routers manipulate the packet by removing headers, adding labels, and copying control word elements from the header to the PDU. 
		
                                                                                          
 
		
                                                                                           Perform this task to configure Frame Relay over MPLS with DLCI-to-DLCI connections. 
		
                                                                                          
 
	 
                                                                                          
SUMMARY STEPS
                                                                                            1.   
       
			  
				enable 
			  
		  
                                                                                            

                                                                                            2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                                            

                                                                                            3.   
       
			  
				frame-relay 
				switching 
			  
		  
                                                                                            

                                                                                            4.   
       
			  
				interface 
			  
			  
				serial 
			  
			  
				slot 
			 /port
		  
                                                                                            

                                                                                            5.   
       
			  
				encapsulation 
				frame-relay 
			  [cisco | 
			 ietf]
		  
                                                                                            

                                                                                            6.   
       
			  
				frame-relay 
				intf-type 
				dce 
			  
		  
                                                                                            

                                                                                            7.   
       
			  
				exit 
			  
		  
                                                                                            

                                                                                            8.   
       
			  
				connect 
			  
			  
				connection-name 
				interface 
				dlci 
			  
			  
				l2transport 
			  
		  
                                                                                            

                                                                                            9.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                                                            

                                                                                            10.   
       
			  
				end 
			  
		  
                                                                                            


                                                                                          DETAILED STEPS
                                                                                             Command or ActionPurpose
                                                                                            Step 1 
			  
				enable 
			  
		  
                                                                                             

                                                                                            Example:
                                                                                             
			 
                                                                                            Router> enable
                                                                                            
 
		  
                                                                                            
 
                                                                                                  		  
			 
                                                                                             Enables privileged EXEC mode. 
			 
                                                                                            
 
			 
                                                                                            •  Enter your password if prompted.
				

                                                                                              • 

                                                                                            
 
		   
      
                                                                                            

                                                                                            Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                                             

                                                                                            Example:
                                                                                             
			 
                                                                                            Router# configure terminal
                                                                                            
 
		  
                                                                                            
 
                                                                                                  		  
			 
                                                                                             Enters global configuration mode.
			 
                                                                                            
 
		   
      
                                                                                            

                                                                                            Step 3 
			  
				frame-relay 
				switching 
			  
		  
                                                                                             

                                                                                            Example:
                                                                                             
			 
                                                                                            Router(config)# frame-relay switching
                                                                                            
 
		  
                                                                                            
 
                                                                                                  		  
			 
                                                                                             Enables PVC switching on a Frame Relay device.
			 
                                                                                            
 
		   
      
                                                                                            

                                                                                            Step 4 
			  
				interface 
			  
			  
				serial 
			  
			  
				slot 
			 /port
		  
                                                                                             

                                                                                            Example:
                                                                                             
			 
                                                                                            Router(config)# interface serial3/1
                                                                                            
 
		  
                                                                                            
 
                                                                                                  		  
			 
                                                                                             Specifies a serial interface and enters interface configuration mode. 
			 
                                                                                            
 
		   
      
                                                                                            

                                                                                            Step 5 
			  
				encapsulation 
				frame-relay 
			  [cisco | 
			 ietf]
		  
                                                                                             

                                                                                            Example:
                                                                                             
			 
                                                                                            Router(config-if)# encapsulation frame-relay ietf 
                                                                                            
 
		  
                                                                                            
 
                                                                                                  		  
			 
                                                                                             Specifies Frame Relay encapsulation for the interface. 
			 
                                                                                            
 
			 
                                                                                            •  You can specify different types of encapsulations. You can set one interface to Cisco encapsulation and the other interface to IETF encapsulation. 
				

                                                                                              • 

                                                                                            
 
		   
      
                                                                                            

                                                                                            Step 6 
			  
				frame-relay 
				intf-type 
				dce 
			  
		  
                                                                                             

                                                                                            Example:
                                                                                             
			 
                                                                                            Router(config-if)# frame-relay intf-type dce
                                                                                            
 
		  
                                                                                            
 
                                                                                                  		  
			 
                                                                                             Specifies that the interface is a DCE switch. 
			 
                                                                                            
 
			 
                                                                                            •  You can also specify the interface to support Network-to-Network Interface (NNI) and DTE connections. 
				

                                                                                              • 

                                                                                            
 
		   
      
                                                                                            

                                                                                            Step 7 
			  
				exit 
			  
		  
                                                                                             

                                                                                            Example:
                                                                                             
			 
                                                                                            Router(config-if)# exit
                                                                                            
 
		  
                                                                                            
 
                                                                                                  		  
			 
                                                                                             Exits from interface configuration mode. 
			 
                                                                                            
 
		   
      
                                                                                            

                                                                                            Step 8 
			  
				connect 
			  
			  
				connection-name 
				interface 
				dlci 
			  
			  
				l2transport 
			  
		  
                                                                                             

                                                                                            Example:
                                                                                             
			 
                                                                                            Router(config)# connect fr1 serial5/0 1000 l2transport
                                                                                            
 
		  
                                                                                            
 
                                                                                                  		  
			 
                                                                                             Defines connections between Frame Relay PVCs and enters connect configuration mode. 
			 
                                                                                            
 
			 
                                                                                            •  Using the 
				  l2transport keyword specifies that the PVC will not be a locally switched PVC, but will be tunneled over the backbone network.
				

                                                                                              • 

                                                                                            •  The 
					 connection-name argument is a text string that you provide. 
				

                                                                                              • 

                                                                                            •  The 
				  interface argument is the interface on which a PVC connection will be defined. 
				

                                                                                              • 

                                                                                            •  The 
				  dlciargument is the DLCI number of the PVC that will be connected.
				

                                                                                              • 

                                                                                            
 
		   
      
                                                                                            

                                                                                            Step 9 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                                                             

                                                                                            Example:
                                                                                             
			 
                                                                                            Router(config-fr-pw-switching)# xconnect 10.0.0.1 123 encapsulation mpls
                                                                                            
 
		  
                                                                                            
 
                                                                                                  		  
			 
                                                                                             Creates the VC to transport the Layer 2 packets. 
			 
                                                                                            
 
			 
                                                                                            •  In a DLCI-to DLCI connection type, Frame Relay over MPLS uses the 
				  xconnect command in connect configuration mode. 
				

                                                                                              • 

                                                                                            
 
		   
      
                                                                                            

                                                                                            Step 10 
			  
				end 
			  
		  
                                                                                             

                                                                                            Example:
                                                                                             
			 
                                                                                            Router(config-fr-pw-switching)# end
                                                                                            
 
		  
                                                                                            
 
                                                                                                  		  
			 
                                                                                             Exits connect configuration mode and returns to privileged EXEC mode.
			 
                                                                                            
 
		   
      
                                                                                            

                                                                                            

                                                                                            

                                                                                            

                                                                                            Configuring Frame Relay over MPLS with Port-to-Port Connections
                                                                                            

                                                                                             
		
                                                                                             Frame Relay over MPLS encapsulates Frame Relay PDUs in MPLS packets and forwards them across the MPLS network. For Frame Relay, you can set up DLCI-to-DLCI connections or port-to-port connections. With port-to-port connections, you use HDLC mode to transport the Frame Relay encapsulated packets. In HDLC mode, the whole HDLC packet is transported. Only the HDLC flags and FCS bits are removed. The contents of the packet are not used or changed, including the backward explicit congestion notification (BECN), forward explicit congestion notification (FECN) and discard eligibility (DE) bits. 
		
                                                                                            
 
		
                                                                                             Perform this task to set up Frame Relay port-to-port connections.
		
                                                                                            
 
	 
                                                                                            
SUMMARY STEPS
                                                                                              1.   
       
			  
				enable 
			  
		  
                                                                                              

                                                                                              2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                                              

                                                                                              3.   
       
			  
				interface 
			  
			  
				serial 
			  
			  
				slot 
			 /port
		  
                                                                                              

                                                                                              4.   
       
			  
				encapsulation 
				hdlc 
			  
			  
				 
				 
			  
		  
                                                                                              

                                                                                              5.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                                                              

                                                                                              6.   
       
			  
				end 
			  
		  
                                                                                              


                                                                                            DETAILED STEPS
                                                                                               Command or ActionPurpose
                                                                                              Step 1 
			  
				enable 
			  
		  
                                                                                               

                                                                                              Example:
                                                                                               
			 
                                                                                              Router> enable
                                                                                              
 
		  
                                                                                              
 
                                                                                                    		  
			 
                                                                                               Enables privileged EXEC mode. 
			 
                                                                                              
 
			 
                                                                                              •  Enter your password if prompted.
				

                                                                                                • 

                                                                                              
 
		   
      
                                                                                              

                                                                                              Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                                               

                                                                                              Example:
                                                                                               
			 
                                                                                              Router# configure terminal
                                                                                              
 
		  
                                                                                              
 
                                                                                                    		  
			 
                                                                                               Enters global configuration mode.
			 
                                                                                              
 
		   
      
                                                                                              

                                                                                              Step 3 
			  
				interface 
			  
			  
				serial 
			  
			  
				slot 
			 /port
		  
                                                                                               

                                                                                              Example:
                                                                                               
			 
                                                                                              Router(config)# interface serial5/0
                                                                                              
 
		  
                                                                                              
 
                                                                                                    		  
			 
                                                                                               Specifies a serial interface and enters interface configuration mode.
			 
                                                                                              
 
		   
      
                                                                                              

                                                                                              Step 4 
			  
				encapsulation 
				hdlc 
			  
			  
				 
				 
			  
		  
                                                                                               

                                                                                              Example:
                                                                                               
			 
                                                                                              Router(config-if)# encapsulation hdlc 
                                                                                              
 
		  
                                                                                              
 
                                                                                                    		  
			 
                                                                                               Specifies that Frame Relay PDUs will be encapsulated in HDLC packets. 
			 
                                                                                              
 
		   
      
                                                                                              

                                                                                              Step 5 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				encapsulation 
				mpls 
			  
		  
                                                                                               

                                                                                              Example:
                                                                                               
			 
                                                                                              Router(config-if)# xconnect 10.0.0.1 123 encapsulation mpls
                                                                                              
 
		  
                                                                                              
 
                                                                                                    		  
			 
                                                                                               Creates the VC to transport the Layer 2 packets. 
			 
                                                                                              
 
			 
                                                                                               
			 
                                                                                              
 
		   
      
                                                                                              

                                                                                              Step 6 
			  
				end 
			  
		  
                                                                                               

                                                                                              Example:
                                                                                               
			 
                                                                                              Router(config-if)# end
                                                                                              
 
		  
                                                                                              
 
                                                                                                    		  
			 
                                                                                               Exits interface configuration mode and enters privileged EXEC mode.
			 
                                                                                              
 
		   
      
                                                                                              

                                                                                              

                                                                                              

                                                                                              

                                                                                              Configuring HDLC and PPP over MPLS
                                                                                              

                                                                                              
      
                                                                                              
With HDLC over MPLS, the whole HDLC packet is transported. The ingress PE router removes only the HDLC flags and FCS bits. The contents of the packet are not used or changed.
                                                                                              

      
                                                                                              
With PPP over MPLS, the ingress PE router removes the flags, address, control field, and the FCS. 
                                                                                              

      

                                                                                              Note
                                                                                              
        
                                                                                              
The following restrictions pertain to the HDLC over MPLS feature:
                                                                                              

        
                                                                                              • 
Asynchronous interfaces are not supported. 

                                                                                                • 

                                                                                              • 
You must configure HDLC over MPLS on router interfaces only. You cannot configure HDLC over MPLS on subinterfaces. 

                                                                                                • 

                                                                                              

        
                                                                                              
The following restrictions pertain to the PPP over MPLS feature:
                                                                                              

        
                                                                                              • 
Zero hops on one router is not supported. However, you can have back-to-back PE routers. 

                                                                                                • 

                                                                                              • 
Asynchronous interfaces are not supported. The connections between the CE and PE routers on both ends of the backbone must have similar link layer characteristics. The connections between the CE and PE routers must both be synchronous. 

                                                                                                • 

                                                                                              • 
Multilink PPP (MLP) is not supported.

                                                                                                • 

                                                                                              • 
You must configure PPP on router interfaces only. You cannot configure PPP on subinterfaces. 

                                                                                                • 

                                                                                              

>
                                                                                              

    
                                                                                              
SUMMARY STEPS
                                                                                                1.   
      
          
            enable
          
        
                                                                                                

                                                                                                2.   
      
          
            configure
          
          
            terminal
          
        
                                                                                                

                                                                                                3.   
      
          
            interface
          
          
            serial
          
          
            slot
          /port
                                                                                                

                                                                                                4.   
      Do one of the following:
                                                                                                • 
            
              encapsulation
            
            
              
              
            
            
              ppp
            
          
                                                                                                  • 

                                                                                                • 
          
                                                                                                  • 

                                                                                                • 
            
              encapsulation
              hdlc
            
          
                                                                                                  • 

                                                                                                

                                                                                                

                                                                                                5.   
      
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                                                

                                                                                                6.   
      
          
            end
          
        
                                                                                                


                                                                                              DETAILED STEPS
                                                                                                 Command or ActionPurpose
                                                                                                Step 1
          
            enable
          
        
                                                                                                 

                                                                                                Example:
                                                                                                
          
                                                                                                Router> enable
                                                                                                

        
                                                                                                
 
                                                                                                      		 
          
                                                                                                
Enables privileged EXEC mode. 
                                                                                                

          
                                                                                                • 
Enter your password if prompted.

                                                                                                  • 

                                                                                                

         
      
                                                                                                

                                                                                                Step 2
          
            configure
          
          
            terminal
          
        
                                                                                                 

                                                                                                Example:
                                                                                                
          
                                                                                                Router# configure terminal
                                                                                                

        
                                                                                                
 
                                                                                                      		 
          
                                                                                                
Enters global configuration mode.
                                                                                                

         
      
                                                                                                

                                                                                                Step 3
          
            interface
          
          
            serial
          
          
            slot
          /port
                                                                                                 

                                                                                                Example:
                                                                                                
          
                                                                                                Router(config)# interface serial5/0
                                                                                                

        
                                                                                                
 
                                                                                                      		 
          
                                                                                                
Specifies a serial interface and enters interface configuration mode. 
                                                                                                

          
                                                                                                • 
You must configure HDLC and PPP over MPLS on router interfaces only. You cannot configure HDLC over MPLS on subinterfaces. 

                                                                                                  • 

                                                                                                

         
      
                                                                                                

                                                                                                Step 4Do one of the following:
                                                                                                • 
            
              encapsulation
            
            
              
              
            
            
              ppp
            
          
                                                                                                  • 

                                                                                                • 
          
                                                                                                  • 

                                                                                                • 
            
              encapsulation
              hdlc
            
          
                                                                                                  • 

                                                                                                
 

                                                                                                Example:
                                                                                                
          
                                                                                                Router(config-if)# encapsulation ppp 
                                                                                                

        
                                                                                                
 

                                                                                                Example:
                                                                                                
          
                                                                                                or 
                                                                                                

        
                                                                                                
 

                                                                                                Example:
                                                                                                
          
                                                                                                            

          
                                                                                                

        
                                                                                                
 

                                                                                                Example:
                                                                                                
          
                                                                                                Router(config-if)# encapsulation hdlc 
                                                                                                

        
                                                                                                
 
                                                                                                      		 
          
                                                                                                
Specifies HDLC or PPP encapsulation and enters connect configuration mode.
                                                                                                

         
      
                                                                                                

                                                                                                Step 5
          
            xconnect
          
          
            peer-router-id
            vcid
          
          
            encapsulation
            mpls
          
        
                                                                                                 

                                                                                                Example:
                                                                                                
          
                                                                                                Router(config-fr-pw-switching)# xconnect 10.0.0.1 123 encapsulation mpls
                                                                                                

        
                                                                                                
 
                                                                                                      		 
          
                                                                                                
Creates the VC to transport the Layer 2 packets. 
                                                                                                

          
                                                                                                
          
                                                                                                

         
      
                                                                                                

                                                                                                Step 6
          
            end
          
        
                                                                                                 
                                                                                                      		 
          
                                                                                                
Exits connect configuration mode and returns to privileged EXEC mode.
                                                                                                

         
      
                                                                                                

                                                                                                

                                                                                                

                                                                                                

                                                                                                Configuring Tunnel Selection
                                                                                                

                                                                                                 
		
                                                                                                 The tunnel selection feature allows you to specify the path that traffic uses. You can specify either an MPLS TE tunnel or destination IP address or domain name server (DNS) name. 
		
                                                                                                
 
		
                                                                                                 You also have the option of specifying whether the VCs should use the default path (the path LDP uses for signaling) if the preferred path is unreachable. This option is enabled by default; you must explicitly disable it.
		
                                                                                                
 
		
                                                                                                 You configure tunnel selection when you set up the pseudowire class. You enable tunnel selection with the 
		  preferred-path command. Then, you apply the pseudowire class to an interface that has been configured to transport AToM packets. 
		
                                                                                                
 
		
                                                                                                 The following guidelines provide more information about configuring tunnel selection:
		
                                                                                                
 
		
                                                                                                •  The 
			 preferred-path command is available only if the pseudowire encapsulation type is MPLS. 
		  

                                                                                                  • 

                                                                                                •  This tunnel selection feature is enabled when you exit from pseudowire mode.
		  

                                                                                                  • 

                                                                                                •  The selected path should be an LSP destined to the peer PE router. 
		  

                                                                                                  • 

                                                                                                •  The selected tunnel must be an MPLS TE tunnel.
		  

                                                                                                  • 

                                                                                                •  If you select a tunnel, the tunnel tailend must be on the remote PE router. 
		  

                                                                                                  • 

                                                                                                •  If you specify an IP address, that address must be the IP address of the loopback interface on the remote PE router. The address must have a /32 mask. There must be an LSP destined to that selected address. The LSP need not be a TE tunnel. 
		  

                                                                                                  • 

                                                                                                
 
	 
                                                                                                
SUMMARY STEPS
                                                                                                  1.   
       
			  
				enable 
			  
		  
                                                                                                  

                                                                                                  2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                                                  

                                                                                                  3.   
       
			  
				pseudowire-class 
			  
			  
				name 
			  
		  
                                                                                                  

                                                                                                  4.   
       
			  
				encapsulation 
				mpls 
			  
		  
                                                                                                  

                                                                                                  5.   
       
			  
				preferred-path 
			  {interface 
				tunnel 
			 tunnel-number | 
			 peer {ip-address | 
			 host-name}} [disable-fallback]
		  
                                                                                                  

                                                                                                  6.   
       
			  
				exit 
			  
		  
                                                                                                  

                                                                                                  7.   
       
			  
				interface 
			  
			  
				slot 
			 /port
		  
                                                                                                  

                                                                                                  8.   
       
			  
				encapsulation 
			  
			  
				encapsulation-type 
			  
		  
                                                                                                  

                                                                                                  9.   
       
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				pw-class 
				name 
			  
		  
                                                                                                  

                                                                                                  10.   
       
			  
				end 
			  
		  
                                                                                                  


                                                                                                DETAILED STEPS
                                                                                                   Command or ActionPurpose
                                                                                                  Step 1 
			  
				enable 
			  
		  
                                                                                                   

                                                                                                  Example:
                                                                                                   
			 
                                                                                                  Router> enable
                                                                                                  
 
		  
                                                                                                  
 
                                                                                                        		  
			 
                                                                                                   Enables privileged EXEC mode. 
			 
                                                                                                  
 
			 
                                                                                                  •  Enter your password if prompted.
				

                                                                                                    • 

                                                                                                  
 
		   
      
                                                                                                  

                                                                                                  Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                                                   

                                                                                                  Example:
                                                                                                   
			 
                                                                                                  Router# configure terminal
                                                                                                  
 
		  
                                                                                                  
 
                                                                                                        		  
			 
                                                                                                   Enters global configuration mode.
			 
                                                                                                  
 
		   
      
                                                                                                  

                                                                                                  Step 3 
			  
				pseudowire-class 
			  
			  
				name 
			  
		  
                                                                                                   

                                                                                                  Example:
                                                                                                   
			 
                                                                                                  Router(config)# pseudowire-class ts1
                                                                                                  
 
		  
                                                                                                  
 
                                                                                                        		  
			 
                                                                                                   Establishes a pseudowire class with a name that you specify and enters pseudowire configuration mode.
			 
                                                                                                  
 
		   
      
                                                                                                  

                                                                                                  Step 4 
			  
				encapsulation 
				mpls 
			  
		  
                                                                                                   

                                                                                                  Example:
                                                                                                   
			 
                                                                                                  Router(config-pw-class)# encapsulation mpls 
                                                                                                  
 
		  
                                                                                                  
 
                                                                                                        		  
			 
                                                                                                   Specifies the tunneling encapsulation. 
			 
                                                                                                  
 
			 
                                                                                                  •  For AToM, the encapsulation type is 
				  mpls.
				

                                                                                                    • 

                                                                                                  
 
		   
      
                                                                                                  

                                                                                                  Step 5 
			  
				preferred-path 
			  {interface 
				tunnel 
			 tunnel-number | 
			 peer {ip-address | 
			 host-name}} [disable-fallback]
		  
                                                                                                   

                                                                                                  Example:
                                                                                                   
			 
                                                                                                  Router(config-pw-class)# preferred path peer 10.18.18.18
                                                                                                  
 
		  
                                                                                                  
 
                                                                                                        		  
			 
                                                                                                   Specifies the MPLS traffic engineering tunnel or IP address or hostname to be used as the preferred path. 
			 
                                                                                                  
 
		   
      
                                                                                                  

                                                                                                  Step 6 
			  
				exit 
			  
		  
                                                                                                   

                                                                                                  Example:
                                                                                                   
			 
                                                                                                  Router(config-pw-class)# exit
                                                                                                  
 
		  
                                                                                                  
 
                                                                                                        		  
			 
                                                                                                   Exits from pseudowire configuration mode. 
			 
                                                                                                  
 
		   
      
                                                                                                  

                                                                                                  Step 7 
			  
				interface 
			  
			  
				slot 
			 /port
		  
                                                                                                   

                                                                                                  Example:
                                                                                                   
			 
                                                                                                  Router(config)# interface atm1/1
                                                                                                  
 
		  
                                                                                                  
 
                                                                                                        		  
			 
                                                                                                   Specifies an interface and enters interface configuration mode.
			 
                                                                                                  
 
		   
      
                                                                                                  

                                                                                                  Step 8 
			  
				encapsulation 
			  
			  
				encapsulation-type 
			  
		  
                                                                                                   

                                                                                                  Example:
                                                                                                   
			 
                                                                                                  Router(config-if)# encapsulation aal5
                                                                                                  
 
		  
                                                                                                  
 
                                                                                                        		  
			 
                                                                                                   Specifies the encapsulation for the interface. 
			 
                                                                                                  
 
		   
      
                                                                                                  

                                                                                                  Step 9 
			  
				xconnect 
			  
			  
				peer-router-id 
				vcid 
			  
			  
				pw-class 
				name 
			  
		  
                                                                                                   

                                                                                                  Example:
                                                                                                   
			 
                                                                                                  Router(config-if)# xconnect 10.0.0.1 123 pw-class ts1
                                                                                                  
 
		  
                                                                                                  
 
                                                                                                        		  
			 
                                                                                                   Binds the attachment circuit to a pseudowire VC. 
			 
                                                                                                  
 
		   
      
                                                                                                  

                                                                                                  Step 10 
			  
				end 
			  
		  
                                                                                                   

                                                                                                  Example:
                                                                                                   
			 
                                                                                                  Router(config-if)# end
                                                                                                  
 
		  
                                                                                                  
 
                                                                                                        		  
			 
                                                                                                   Exits interface configuration mode and returns to Privileged EXEC mode.
			 
                                                                                                  
 
		   
      
                                                                                                  

                                                                                                  

                                                                                                  Examples
                                                                                                  
		
		
                                                                                                   In the following example, the 
		  show 
			 mpls 
			 l2transport 
			 vc command shows the following information about the VCs:
		
                                                                                                  

		
                                                                                                  •  VC 101 has been assigned a preferred path called Tunnel1. The default path is disabled, because the preferred path specified that the default path should not be used if the preferred path fails. 
		  

                                                                                                    • 

                                                                                                  •  VC 150 has been assigned an IP address of a loopback address on PE2. The default path can be used if the preferred path fails. 
		  

                                                                                                    • 

                                                                                                  

		
                                                                                                   In the following example, command output that is bolded shows the preferred path information.
		
                                                                                                  
 
		
                                                                                                  Router# show mpls l2transport vc detail
Local interface: Gi0/0/0.1 up, line protocol up, Eth VLAN 222 up
  Destination address: 10.16.16.16, VC ID: 101, VC status: up
    Preferred path: Tunnel1,  active
    Default path: disabled
    Tunnel label: 3, next hop point2point
    Output interface: Tu1, imposed label stack {17 16}
  Create time: 00:27:31, last status change time: 00:27:31
  Signaling protocol: LDP, peer 10.16.16.16:0 up
    MPLS VC labels: local 25, remote 16
    Group ID: local 0, remote 6
    MTU: local 1500, remote 1500
    Remote interface description:
  Sequencing: receive disabled, send disabled
  VC statistics:
    packet totals: receive 10, send 10
    byte totals:   receive 1260, send 1300
    packet drops:  receive 0, send 0
Local interface: AT1/0/0 up, line protocol up, ATM AAL5 0/50 up
  Destination address: 10.16.16.16, VC ID: 150, VC status: up
    Preferred path: 10.18.18.18, active
    Default path: ready
    Tunnel label: 3, next hop point2point
    Output interface: Tu2, imposed label stack {18 24}
  Create time: 00:15:08, last status change time: 00:07:37
  Signaling protocol: LDP, peer 10.16.16.16:0 up
    MPLS VC labels: local 26, remote 24
    Group ID: local 2, remote 0
    MTU: local 4470, remote 4470
    Remote interface description:
  Sequencing: receive disabled, send disabled
  VC statistics:
    packet totals: receive 0, send 0
    byte totals:   receive 0, send 0
    packet drops:  receive 0, send 0
                                                                                                  

	 
                                                                                                  

                                                                                                  

                                                                                                  Troubleshooting Tips
                                                                                                  

                                                                                                  
You can use the debug mpls l2transport vc eventcommand to troubleshoot tunnel selection. For example, if the tunnel interface that is used for the preferred path is shut down, the default path is enabled. The debug mpls l2transport vc eventcommand provides the following output:
                                                                                                  

                                                                                                  AToM SMGR [10.2.2.2, 101]: Processing imposition update, vc_handle 62091860, update_action 3, remote_vc_label 16 
AToM SMGR [10.2.2.2, 101]: selected route no parent rewrite: tunnel not up 
AToM SMGR [10.2.2.2, 101]: Imposition Programmed, Output Interface: Et3/2 
                                                                                                  

                                                                                                  

                                                                                                  

                                                                                                  

                                                                                                  Setting Experimental Bits with AToM
                                                                                                  

                                                                                                   
		
                                                                                                   MPLS AToM uses the three experimental bits in a label to determine the queue of packets. You statically set the experimental bits in both the VC label and the LSP tunnel label, because the LSP tunnel label might be removed at the penultimate router. The following sections explain the transport-specific implementations of the EXP bits.
		
                                                                                                  
 
		

                                                                                                  Note
                                                                                                   For information about setting EXP bits on the Cisco 12000 series router for Cisco IOS Release 12.0(30)S, see the AToM: L2 QoS feature module. 
		
                                                                                                  

                                                                                                  
 
		

                                                                                                  Note
                                                                                                   
		  
                                                                                                   The following restrictions apply to ATM AAL5 over MPLS with EXP bits:
		  
                                                                                                  
 
		  
                                                                                                  •  ATM AAL5 over MPLS allows you to statically set the experimental bits.
			 

                                                                                                    • 

                                                                                                  •  If you do not assign values to the experimental bits, the priority bits in the header’s “tag control information” field are set to zero.
			 

                                                                                                    • 

                                                                                                  •  On the Cisco 7500 series routers, distributed Cisco Express Forwarding must be enabled before you set the experimental bits. 
			 

                                                                                                    • 

                                                                                                  
 
		  
                                                                                                   The following restrictions apply to ATM Cell Relay over MPLS with EXP bits:
		  
                                                                                                  
 
		  
                                                                                                  •  ATM Cell Relay over MPLS allows you to statically set the experimental bits in VC, PVP, and port modes. 
			 

                                                                                                    • 

                                                                                                  •  If you do not assign values to the experimental bits, the priority bits in the header’s “tag control information” field are set to zero.
			 

                                                                                                    • 

                                                                                                  •  On the Cisco 7500 series routers, distributed Cisco Express Forwarding must be enabled before you set the experimental bits. 
			 

                                                                                                    • 

                                                                                                  
 
		  
                                                                                                   The following restrictions apply to Ethernet over MPLS with EXP bits:
		  
                                                                                                  
 
		  
                                                                                                   
			  On the Cisco 7200 and 7500 Series Routers 
		  
                                                                                                  
 
		  
                                                                                                  •  Ethernet over MPLS allows you to set the EXP bits by using either of the following methods:
				
                                                                                                    •  Writing the priority bits into the experimental bit field, which is the default.
				  
                                                                                                      • 

                                                                                                    •  Using the 
					 match 
						anycommand with the 
					 set 
						mpls 
						exp command.
				  
                                                                                                      • 

                                                                                                    

			 
                                                                                                    

                                                                                                    • 

                                                                                                  •  If you do not assign values to the experimental bits, the priority bits in the 802.1Q header’s “tag control information” field are written into the experimental bit fields.
			 

                                                                                                    • 

                                                                                                  •  On the Cisco 7500 series routers, distributed Cisco Express Forwarding must be enabled before you set the experimental bits. 
			 

                                                                                                    • 

                                                                                                  
 
		  
                                                                                                   
			  On the Cisco 10720 Internet Router 
		  
                                                                                                  
 
		  
                                                                                                   The table below lists the commands that are supported on the Cisco 10720 Internet router for Ethernet over MPLS. The letter Y means that the command is supported on that interface. A dash (--) means that command is not supported on that interface.
		  
                                                                                                  
 
		  
                                                                                                   
			 

                                                                                                  Note
                                                                                                   The 
				match 
				  coscommand is supported only on subinterfaces, not main interfaces.
			 
                                                                                                  

                                                                                                  
 
		  
                                                                                                  
 
		
                                                                                                  
 
		

                                                                                                  Table 7 Commands Supported on the Cisco 10720 Router for Ethernet over MPLS
                                                                                                   
				  
                                                                                                   Commands
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Imposition
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Disposition
				  
                                                                                                  
 
				                                                                                                  		

                                                                                                  
                                                                                                  

                                                                                                   
				  
                                                                                                   
					  
						Traffic 
						Matching 
						Commands 
					  
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   In
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Out
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   In 
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Out
				  
                                                                                                  
 
				                                                                                                  		

                                                                                                  

                                                                                                   
				  
                                                                                                   
					  
						match 
						any 
					  
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Y
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Y
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Y
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Y
				  
                                                                                                  
 
				                                                                                                  		

                                                                                                  

                                                                                                   
				  
                                                                                                   
					  
						match 
						cos 
					  
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Y
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		

                                                                                                  

                                                                                                   
				  
                                                                                                   
					  
						match 
						input-interface 
					  
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Y
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Y
				  
                                                                                                  
 
				                                                                                                  		

                                                                                                  

                                                                                                   
				  
                                                                                                   
					  
						match 
						mpls 
						exp 
					  
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Y
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Y
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		

                                                                                                  

                                                                                                   
				  
                                                                                                   
					  
						match 
						qos-group 
					  
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Y
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Y
				  
                                                                                                  
 
				                                                                                                  		

                                                                                                  

                                                                                                   
				  
                                                                                                   
					  
						Traffic 
						Action 
						Commands 
					  
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   In
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Out
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   In 
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Out
				  
                                                                                                  
 
				                                                                                                  		

                                                                                                  

                                                                                                   
				  
                                                                                                   
					  
						set 
						cos 
					  
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Y
				  
                                                                                                  
 
				                                                                                                  		

                                                                                                  

                                                                                                   
				  
                                                                                                   
					  
						set 
						mpls 
						exp 
					  
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Y
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		

                                                                                                  

                                                                                                   
				  
                                                                                                   
					  
						set 
						qos-group 
					  
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Y
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Y
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		

                                                                                                  

                                                                                                   
				  
                                                                                                   
					  
						set 
						srp-priority 
					  
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   Y
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		
 
				  
                                                                                                   --
				  
                                                                                                  
 
				                                                                                                  		

                                                                                                  
                                                                                                  

                                                                                                  

                                                                                                  
 
		
                                                                                                   The following restrictions apply to Frame Relay over MPLS and EXP bits:
		
                                                                                                  
 
		
                                                                                                  •  If you do not assign values to the experimental bits, the priority bits in the header's “tag control information” field are set to zero.
		  

                                                                                                    • 

                                                                                                  •  On the Cisco 7500 series routers, distributed Cisco Express Forwarding must be enabled before you set the experimental bits. 
		  

                                                                                                    • 

                                                                                                  
 
		
                                                                                                   The following restrictions apply to HDLC over MPLS and PPP over MPLS and EXP bits:
		
                                                                                                  
 
		
                                                                                                  •  If you do not assign values to the experimental bits, zeros are written into the experimental bit fields.
		  

                                                                                                    • 

                                                                                                  •  On the Cisco 7500 series routers, enable distributed Cisco Express Forwarding before setting the experimental bits. 
		  

                                                                                                    • 

                                                                                                  
 
		
                                                                                                   Set the experimental bits in both the VC label and the LSP tunnel label. You set the experimental bits in the VC label, because the LSP tunnel label might be removed at the penultimate router. Perform this task to set the experimental bits. 
		
                                                                                                  
 
	 
                                                                                                  
SUMMARY STEPS
                                                                                                    1.   
       
			  
				enable 
			  
		  
                                                                                                    

                                                                                                    2.   
       
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                                                    

                                                                                                    3.   
       
			  
				class-map 
			  
			  
				class-name 
			  
		  
                                                                                                    

                                                                                                    4.   
       
			  
				match 
				any 
			  
		  
                                                                                                    

                                                                                                    5.   
       
			  
				exit 
			  
		  
                                                                                                    

                                                                                                    6.   
       
			  
				policy-map 
			  
			  
				policy-name 
			  
		  
                                                                                                    

                                                                                                    7.   
       
			  
				class 
			  
			  
				class-name 
			  
		  
                                                                                                    

                                                                                                    8.   
       
			  
				set 
				mpls 
				experimental 
			  
			  
				value 
			  
		  
                                                                                                    

                                                                                                    9.   
       
			  
				exit 
			  
			  
				 
				 
			  
		  
                                                                                                    

                                                                                                    10.   
       
			  
				exit 
			  
		  
                                                                                                    

                                                                                                    11.   
       
			  
				interface 
			  
			  
				slot 
			 /port
		  
                                                                                                    

                                                                                                    12.   
       
			  
				service-policy 
				input 
			  
			  
				policy-name 
			  
		  
                                                                                                    

                                                                                                    13.   
       
			  
				exit 
			  
		  
                                                                                                    

                                                                                                    14.   
       
			  
				exit 
			  
		  
                                                                                                    

                                                                                                    15.   
       
			  
				show 
				policy-map 
				interface 
			  
			  
				interface-name 
			  [vc [vpi/] 
			 vci] [dlci 
			 dlci] [input | 
			 output] 
		  
                                                                                                    


                                                                                                  DETAILED STEPS
                                                                                                     Command or ActionPurpose
                                                                                                    Step 1 
			  
				enable 
			  
		  
                                                                                                     

                                                                                                    Example:
                                                                                                     
			 
                                                                                                    Router> enable
                                                                                                    
 
		  
                                                                                                    
 
                                                                                                          		  
			 
                                                                                                     Enables privileged EXEC mode. 
			 
                                                                                                    
 
			 
                                                                                                    •  Enter your password if prompted.
				

                                                                                                      • 

                                                                                                    
 
		   
      
                                                                                                    

                                                                                                    Step 2 
			  
				configure 
			  
			  
				terminal 
			  
		  
                                                                                                     

                                                                                                    Example:
                                                                                                     
			 
                                                                                                    Router# configure terminal
                                                                                                    
 
		  
                                                                                                    
 
                                                                                                          		  
			 
                                                                                                     Enters global configuration mode.
			 
                                                                                                    
 
		   
      
                                                                                                    

                                                                                                    Step 3 
			  
				class-map 
			  
			  
				class-name 
			  
		  
                                                                                                     

                                                                                                    Example:
                                                                                                     
			 
                                                                                                    Router(config)# class-map class1 
                                                                                                    
 
		  
                                                                                                    
 
                                                                                                          		  
			 
                                                                                                     Specifies the user-defined name of the traffic class and enters class map configuration mode. 
			 
                                                                                                    
 
		   
      
                                                                                                    

                                                                                                    Step 4 
			  
				match 
				any 
			  
		  
                                                                                                     

                                                                                                    Example:
                                                                                                     
			 
                                                                                                    Router(config-cmap)# match any
                                                                                                    
 
		  
                                                                                                    
 
                                                                                                          		  
			 
                                                                                                     Specifies that all packets will be matched. 
			 
                                                                                                    
 
			 
                                                                                                    •  Use only the 
				  any keyword. Other keywords might cause unexpected results.
				

                                                                                                      • 

                                                                                                    
 
		   
      
                                                                                                    

                                                                                                    Step 5 
			  
				exit 
			  
		  
                                                                                                     

                                                                                                    Example:
                                                                                                     
			 
                                                                                                    Router(config-cmap)# exit
                                                                                                    
 
		  
                                                                                                    
 
                                                                                                          		  
			 
                                                                                                     Exits class map configuration mode.
			 
                                                                                                    
 
		   
      
                                                                                                    

                                                                                                    Step 6 
			  
				policy-map 
			  
			  
				policy-name 
			  
		  
                                                                                                     

                                                                                                    Example:
                                                                                                     
			 
                                                                                                    Router(config)# policy-map policy1 
                                                                                                    
 
		  
                                                                                                    
 
                                                                                                          		  
			 
                                                                                                     Specifies the name of the traffic policy to configure and enters policy-map configuration mode.
			 
                                                                                                    
 
		   
      
                                                                                                    

                                                                                                    Step 7 
			  
				class 
			  
			  
				class-name 
			  
		  
                                                                                                     

                                                                                                    Example:
                                                                                                     
			 
                                                                                                    Router(config-pmap)# class class1
                                                                                                    
 
		  
                                                                                                    
 
                                                                                                          		  
			 
                                                                                                     Specifies the name of the predefined traffic that was configured with the 
				class-map command and was used to classify traffic to the traffic policy specified, and enters policy-map class configuration mode. 
			 
                                                                                                    
 
		   
      
                                                                                                    

                                                                                                    Step 8 
			  
				set 
				mpls 
				experimental 
			  
			  
				value 
			  
		  
                                                                                                     

                                                                                                    Example:
                                                                                                     
			 
                                                                                                    Router(config-pmap-c)# set mpls experimental 7
                                                                                                    
 
		  
                                                                                                    
 
                                                                                                          		  
			 
                                                                                                     Designates the value to which the MPLS bits are set if the packets match the specified policy map. 
			 
                                                                                                    
 
		   
      
                                                                                                    

                                                                                                    Step 9 
			  
				exit 
			  
			  
				 
				 
			  
		  
                                                                                                     

                                                                                                    Example:
                                                                                                     
			 
                                                                                                    Router(config-pmap-c)# exit
                                                                                                    
 
		  
                                                                                                    
 
                                                                                                          		  
			 
                                                                                                     Exits policy-map class configuration mode.
			 
                                                                                                    
 
		   
      
                                                                                                    

                                                                                                    Step 10 
			  
				exit 
			  
		  
                                                                                                     

                                                                                                    Example:
                                                                                                     
			 
                                                                                                    Router(config-pmap)# exit
                                                                                                    
 
		  
                                                                                                    
 
                                                                                                          		  
			 
                                                                                                     Exits policy-map configuration mode. 
			 
                                                                                                    
 
		   
      
                                                                                                    

                                                                                                    Step 11 
			  
				interface 
			  
			  
				slot 
			 /port
		  
                                                                                                     

                                                                                                    Example:
                                                                                                     
			 
                                                                                                    Router(config)# interface atm4/0 
                                                                                                    
 
		  
                                                                                                    
 
                                                                                                          		  
			 
                                                                                                     Specifies the interface and enters interface configuration mode.
			 
                                                                                                    
 
		   
      
                                                                                                    

                                                                                                    Step 12 
			  
				service-policy 
				input 
			  
			  
				policy-name 
			  
		  
                                                                                                     

                                                                                                    Example:
                                                                                                     
			 
                                                                                                    Router(config-if)# service-policy input policy1 
                                                                                                    
 
		  
                                                                                                    
 
                                                                                                          		  
			 
                                                                                                     Attaches a traffic policy to an interface.
			 
                                                                                                    
 
		   
      
                                                                                                    

                                                                                                    Step 13 
			  
				exit 
			  
		  
                                                                                                     

                                                                                                    Example:
                                                                                                     
			 
                                                                                                    Router(config-if)# exit
                                                                                                    
 
		  
                                                                                                    
 
                                                                                                          		  
			 
                                                                                                     Exits interface configuration mode. 
			 
                                                                                                    
 
		   
      
                                                                                                    

                                                                                                    Step 14 
			  
				exit 
			  
		  
                                                                                                     

                                                                                                    Example:
                                                                                                     
			 
                                                                                                    Router(config)# exit
                                                                                                    
 
		  
                                                                                                    
 
                                                                                                          		  
			 
                                                                                                     Exits global configuration mode. 
			 
                                                                                                    
 
		   
      
                                                                                                    

                                                                                                    Step 15 
			  
				show 
				policy-map 
				interface 
			  
			  
				interface-name 
			  [vc [vpi/] 
			 vci] [dlci 
			 dlci] [input | 
			 output] 
		  
                                                                                                     

                                                                                                    Example:
                                                                                                     
			 
                                                                                                    Router# show policy-map interface serial3/0 
                                                                                                    
 
		  
                                                                                                    
 
                                                                                                          		  
			 
                                                                                                     Displays the traffic policy attached to an interface.
			 
                                                                                                    
 
		   
      
                                                                                                    

                                                                                                    

                                                                                                    

                                                                                                    

                                                                                                    Setting the Frame Relay Discard Eligibility Bit on the Cisco 7200 and 7500 Series Routers
                                                                                                    

                                                                                                    
      
                                                                                                    
You can use the DE bit in the address field of a Frame Relay frame to prioritize frames in congested Frame Relay networks. The Frame Relay DE bit has only one bit and can therefore only have two settings, 0 or 1. If congestion occurs in a Frame Relay network, frames with the DE bit set to 1 are discarded before frames with the DE bit set to 0. Therefore, important traffic should have the DE bit set to 0, and less important traffic should be forwarded with the DE bit set at 1. The default DE bit setting is 0. You can change the DE bit setting to 1 with the set fr-de command. 
                                                                                                    

      

                                                                                                    Note
                                                                                                    
The set fr-de command can be used only in an output service policy.
                                                                                                    

                                                                                                    

      
                                                                                                    
Perform this task to set the Frame Relay DE bit on the Cisco 7200 and 7500 series routers.
                                                                                                    

    
                                                                                                    
SUMMARY STEPS
                                                                                                      1.   
      
          
            enable
          
        
                                                                                                      

                                                                                                      2.   
      
          
            configure
          
          
            terminal
          
        
                                                                                                      

                                                                                                      3.   
      
          
            policy-map
          
          
            policy-name
          
        
                                                                                                      

                                                                                                      4.   
      
          
            class
          
          
            class-name
          
        
                                                                                                      

                                                                                                      5.   
      
          
            set
            fr-de
          
        
                                                                                                      

                                                                                                      6.   
      
          
            end
          
        
                                                                                                      


                                                                                                    DETAILED STEPS
                                                                                                       Command or ActionPurpose
                                                                                                      Step 1
          
            enable
          
        
                                                                                                       

                                                                                                      Example:
                                                                                                      
          
                                                                                                      Router> enable
                                                                                                      

        
                                                                                                      
 
                                                                                                            		 
          
                                                                                                      
Enables privileged EXEC mode. 
                                                                                                      

          
                                                                                                      • 
Enter your password if prompted.

                                                                                                        • 

                                                                                                      

         
      
                                                                                                      

                                                                                                      Step 2
          
            configure
          
          
            terminal
          
        
                                                                                                       

                                                                                                      Example:
                                                                                                      
          
                                                                                                      Router# configure terminal
                                                                                                      

        
                                                                                                      
 
                                                                                                            		 
          
                                                                                                      
Enters global configuration mode.
                                                                                                      

         
      
                                                                                                      

                                                                                                      Step 3
          
            policy-map
          
          
            policy-name
          
        
                                                                                                       

                                                                                                      Example:
                                                                                                      
          
                                                                                                      Router(config)# policy-map policy1
                                                                                                      

        
                                                                                                      
 
                                                                                                            		 
          
                                                                                                      
Specifies the name of the traffic policy to configure and enters policy-map configuration mode. 
                                                                                                      

          
                                                                                                      • 
Names can be a maximum of 40 alphanumeric characters.

                                                                                                        • 

                                                                                                      

         
      
                                                                                                      

                                                                                                      Step 4
          
            class
          
          
            class-name
          
        
                                                                                                       

                                                                                                      Example:
                                                                                                      
          
                                                                                                      Router(config-pmap)# class class1 
                                                                                                      

        
                                                                                                      
 
                                                                                                            		 
          
                                                                                                      
Specifies the name of a predefined traffic class and enters policy-map class configuration mode. 
                                                                                                      

         
      
                                                                                                      

                                                                                                      Step 5
          
            set
            fr-de
          
        
                                                                                                       

                                                                                                      Example:
                                                                                                      
          
                                                                                                      Router(config-pmap-c)# set fr-de
                                                                                                      

        
                                                                                                      
 
                                                                                                            		 
          
                                                                                                      
Sets the Frame Relay DE bit setting for all packets that match the specified traffic class from 0 to 1. 
                                                                                                      

         
      
                                                                                                      

                                                                                                      Step 6
          
            end
          
        
                                                                                                       

                                                                                                      Example:
                                                                                                      
          
                                                                                                      Router(config-pmap-c)# end
                                                                                                      

        
                                                                                                      
 
                                                                                                            		 
          
                                                                                                      
Exits policy-map class configuration mode and returns to privileged EXEC mode.
                                                                                                      

         
      
                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      Matching the Frame Relay DE Bit on the Cisco 7200 and 7500 Series Routers
                                                                                                      

                                                                                                      
      
                                                                                                      
You can use the match fr-decommand to enable frames with a DE bit setting of 1 to be considered a member of a defined class and forwarded according to the specifications set in the service policy. 
                                                                                                      

      
                                                                                                      
Perform this task to match frames with the FR DE bit set to 1.
                                                                                                      

    
                                                                                                      
SUMMARY STEPS
                                                                                                        1.   
      
          
            enable
          
        
                                                                                                        

                                                                                                        2.   
      
          
            configure
          
          
            terminal
          
        
                                                                                                        

                                                                                                        3.   
      
          
            class-map
          
          
            class-map-name
          
        
                                                                                                        

                                                                                                        4.   
      
          
            match
            fr-de
          
        
                                                                                                        

                                                                                                        5.   
      
          
            end
          
        
                                                                                                        


                                                                                                      DETAILED STEPS
                                                                                                         Command or ActionPurpose
                                                                                                        Step 1
          
            enable
          
        
                                                                                                         

                                                                                                        Example:
                                                                                                        
          
                                                                                                        Router> enable
                                                                                                        

        
                                                                                                        
 
                                                                                                              		 
          
                                                                                                        
Enables privileged EXEC mode. 
                                                                                                        

          
                                                                                                        • 
Enter your password if prompted.

                                                                                                          • 

                                                                                                        

         
      
                                                                                                        

                                                                                                        Step 2
          
            configure
          
          
            terminal
          
        
                                                                                                         

                                                                                                        Example:
                                                                                                        
          
                                                                                                        Router# configure terminal
                                                                                                        

        
                                                                                                        
 
                                                                                                              		 
          
                                                                                                        
Enters global configuration mode.
                                                                                                        

         
      
                                                                                                        

                                                                                                        Step 3
          
            class-map
          
          
            class-map-name
          
        
                                                                                                         

                                                                                                        Example:
                                                                                                        
          
                                                                                                        Router(config)# class-map de-bits
                                                                                                        

        
                                                                                                        
 
                                                                                                              		 
          
                                                                                                        
Specifies the name of a predefined traffic class and enters class-map configuration mode. 
                                                                                                        

         
      
                                                                                                        

                                                                                                        Step 4
          
            match
            fr-de
          
        
                                                                                                         

                                                                                                        Example:
                                                                                                        
          
                                                                                                        Router(config-cmap)# match fr-de
                                                                                                        

        
                                                                                                        
 
                                                                                                              		 
          
                                                                                                        
Classifies all frames with the DE bit set to 1. 
                                                                                                        

         
      
                                                                                                        

                                                                                                        Step 5
          
            end
          
        
                                                                                                         

                                                                                                        Example:
                                                                                                        
          
                                                                                                        Router(config-cmap)# end
                                                                                                        

        
                                                                                                        
 
                                                                                                              		 
          
                                                                                                        
Exits class-map configuration mode and returns to privileged EXEC mode.
                                                                                                        

         
      
                                                                                                        

                                                                                                        

                                                                                                        

                                                                                                        

                                                                                                        Enabling the Control Word
                                                                                                        

                                                                                                        
      
                                                                                                        
You can enable the control word for dynamic and static pseudowires under a pseudowire class. Use the control-word command to enable, disable, or set a control word to autosense mode. If you do not enable a control word, autosense is the default mode for the control word.
                                                                                                        

      
                                                                                                        
Perform this task to enable a control word.
                                                                                                        

    
                                                                                                        
SUMMARY STEPS
                                                                                                          1.   
      
          
            enable
          
        
                                                                                                          

                                                                                                          2.   
      
          
            configure
          
          
            terminal
          
        
                                                                                                          

                                                                                                          3.   
      
          
            pseudowire-class
            cw_enable
          
        
                                                                                                          

                                                                                                          4.   
      
          
            encapsulation
            mpls
          
          
            
            
          
        
                                                                                                          

                                                                                                          5.   
      
          
            control-word
          
          
            
            
          
        
                                                                                                          

                                                                                                          6.   
      
          
            exit
          
          
            
            
          
        
                                                                                                          

                                                                                                          7.   
      
          
            exit
          
        
                                                                                                          


                                                                                                        DETAILED STEPS
                                                                                                           Command or ActionPurpose
                                                                                                          Step 1
          
            enable
          
        
                                                                                                           

                                                                                                          Example:
                                                                                                          
          
                                                                                                          Router> enable
                                                                                                          

        
                                                                                                          
 
                                                                                                                		 
          
                                                                                                          
Enables privileged EXEC mode. 
                                                                                                          

          
                                                                                                          • 
Enter your password if prompted.

                                                                                                            • 

                                                                                                          

         
      
                                                                                                          

                                                                                                          Step 2
          
            configure
          
          
            terminal
          
        
                                                                                                           

                                                                                                          Example:
                                                                                                          
          
                                                                                                          Router# configure terminal
                                                                                                          

        
                                                                                                          
 
                                                                                                                		 
          
                                                                                                          
Enters global configuration mode.
                                                                                                          

         
      
                                                                                                          

                                                                                                          Step 3
          
            pseudowire-class
            cw_enable
          
        
                                                                                                           

                                                                                                          Example:
                                                                                                          
          
                                                                                                          Router(config)# pseudowire-class cw_enable
                                                                                                          

        
                                                                                                          
 
                                                                                                                		 
          
                                                                                                          
Enters pseudowire class configuration mode. 
                                                                                                          

         
      
                                                                                                          

                                                                                                          Step 4
          
            encapsulation
            mpls
          
          
            
            
          
        
                                                                                                           

                                                                                                          Example:
                                                                                                          
          
                                                                                                          Router(config-pw-class)# encapsulation mpls 
                                                                                                          

        
                                                                                                          
 
                                                                                                                		 
          
                                                                                                          
Specifies the tunneling encapsulation. 
                                                                                                          

          
                                                                                                          • 
For AToM, the encapsulation type is mpls.

                                                                                                            • 

                                                                                                          

         
      
                                                                                                          

                                                                                                          Step 5
          
            control-word
          
          
            
            
          
        
                                                                                                           

                                                                                                          Example:
                                                                                                          
          
                                                                                                          Router(config-pw-class)# control-word 
                                                                                                          

        
                                                                                                          
 
                                                                                                                		 
          
                                                                                                          
Enables the control word. 
                                                                                                          

         
      
                                                                                                          

                                                                                                          Step 6
          
            exit
          
          
            
            
          
        
                                                                                                           

                                                                                                          Example:
                                                                                                          
          
                                                                                                          Router(config-pw-class)# exit 
                                                                                                          

        
                                                                                                          
 
                                                                                                                		 
          
                                                                                                          
Exits pseudowire class configuration mode and returns to global configuration mode. 
                                                                                                          

         
      
                                                                                                          

                                                                                                          Step 7
          
            exit
          
        
                                                                                                           

                                                                                                          Example:
                                                                                                          
          
                                                                                                          Router(config)# exit
                                                                                                          

        
                                                                                                          
 
                                                                                                                		 
          
                                                                                                          
Exits global configuration mode.
                                                                                                          

         
      
                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          Configuration Examples for Any Transport over MPLS
                                                                                                          

                                                                                                           
	 
                                                                                                          

                                                                                                          

                                                                                                          Example  ATM AAL5 over MPLS
                                                                                                          

                                                                                                          
    
                                                                                                          

                                                                                                          ATM AAL5 over MPLS on PVCs
                                                                                                          
      
      
                                                                                                          
The following example shows how to enable ATM AAL5 over MPLS on an ATM PVC:
                                                                                                          

      
                                                                                                          enable
 configure terminal
 interface atm1/
0
 pvc 1/
200 l2transport
 encapsulation aal5
 xconnect 10.13.13.13 100 encapsulation mpls
                                                                                                          

    
                                                                                                          

                                                                                                          ATM AAL5 over MPLS in VC Class Configuration Mode
                                                                                                          
      
      
                                                                                                          
The following example shows how to configure ATM AAL5 over MPLS in VC class configuration mode. The VC class is then applied to an interface.
                                                                                                          

      
                                                                                                          enable
configure terminal
vc-class atm aal5class
encapsulation aal5
interface atm1/
0
class-int aal5class
pvc 1/
200 l2transport
xconnect 10.13.13.13 100 encapsulation mpls

                                                                                                          

      
                                                                                                          
The following example shows how to configure ATM AAL5 over MPLS in VC class configuration mode. The VC class is then applied to a PVC.
                                                                                                          

      
                                                                                                          enable
configure terminal
vc-class atm aal5class
encapsulation aal5
interface atm1/
0
pvc 1/
200 l2transport
class-vc aal5class
xconnect 10.13.13.13 100 encapsulation mpls
                                                                                                          

    
                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          Example  OAM Cell Emulation for ATM AAL5 over MPLS
                                                                                                          

                                                                                                          
    
                                                                                                          

                                                                                                          OAM Cell Emulation for ATM AAL5 over MPLS on PVCs
                                                                                                          
      
      
                                                                                                          
The following example shows how to enable OAM cell emulation on an ATM PVC:
                                                                                                          

      
                                                                                                          interface ATM 1/0/0
pvc 1/200 l2transport
encapsulation aal5
xconnect 10.13.13.13 100 encapsulation mpls 
oam-ac emulation-enable
oam-pvc manage

                                                                                                          

      
                                                                                                          
The following example shows how to set the rate at which an AIS cell is sent every 30 seconds:
                                                                                                          

      
                                                                                                          interface ATM 1/0/0
pvc 1/200 l2transport
encapsulation aal5
xconnect 10.13.13.13 100 encapsulation mpls 
oam-ac emulation-enable 30
oam-pvc manage
                                                                                                          

    
                                                                                                          

                                                                                                          OAM Cell Emulation for ATM AAL5 over MPLS in VC Class Configuration Mode
                                                                                                          
      
      
                                                                                                          
The following example shows how to configure OAM cell emulation for ATM AAL5 over MPLS in VC class configuration mode. The VC class is then applied to an interface.
                                                                                                          

      
                                                                                                          enable
configure terminal
vc-class atm oamclass
encapsulation aal5
oam-ac emulation-enable 30
oam-pvc manage
interface atm1/0
class-int oamclass
pvc 1/200 l2transport
xconnect 10.13.13.13 100 encapsulation mpls

                                                                                                          

      
                                                                                                          
The following example shows how to configure OAM cell emulation for ATM AAL5 over MPLS in VC class configuration mode. The VC class is then applied to a PVC.
                                                                                                          

      
                                                                                                          enable
configure terminal
vc-class atm oamclass
encapsulation aal5
oam-ac emulation-enable 30
oam-pvc manage
interface atm1/0
pvc 1/200 l2transport
class-vc oamclass
xconnect 10.13.13.13 100 encapsulation mpls

                                                                                                          

      
                                                                                                          
The following example shows how to configure OAM cell emulation for ATM AAL5 over MPLS in VC class configuration mode. The VC class is then applied to an interface. One PVC is configured with OAM cell emulation at an AIS rate of 10. That PVC uses the AIS rate of 10 instead of 30.
                                                                                                          

      
                                                                                                          enable
configure terminal
vc-class atm oamclass
encapsulation aal5
oam-ac emulation-enable 30
oam-pvc manage
interface atm1/0
class-int oamclass
pvc 1/200 l2transport
oam-ac emulation-enable 10
xconnect 10.13.13.13 100 encapsulation mpls
                                                                                                          

    
                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          Example  ATM Cell Relay over MPLS
                                                                                                          

                                                                                                          
    
                                                                                                          

                                                                                                          ATM Cell Relay over MPLS in VC Mode Using VC Class Configuration Mode
                                                                                                          
      
      
                                                                                                          
The following example shows how to configure ATM cell relay over MPLS in VC class configuration mode. The VC class is then applied to an interface.
                                                                                                          

      
                                                                                                          enable
configure terminal
vc-class atm cellrelay
encapsulation aal0
interface atm1/0
class-int cellrelay
pvc 1/200 l2transport
xconnect 10.13.13.13 100 encapsulation mpls

                                                                                                          

      
                                                                                                          
The following example shows how to configure ATM cell relay over MPLS in VC class configuration mode. The VC class is then applied to a PVC.
                                                                                                          

      
                                                                                                          enable
configure terminal
vc-class atm cellrelay
encapsulation aal0
interface atm1/0
pvc 1/200 l2transport
class-vc cellrelay
                                                                                                          

      
                                                                                                          
xconnect 10.13.13.13 100 encapsulation mpls
                                                                                                          

    
                                                                                                          

                                                                                                          ATM Cell Relay over MPLS in PVP Mode
                                                                                                          
      
      
                                                                                                          
The following example shows how to transport single ATM cells over a virtual path:
                                                                                                          

      
                                                                                                          pseudowire-class vp-cell-relay
encapsulation mpls
interface atm 5/0 
atm pvp 1 l2transport 
xconnect 10.0.0.1 123 pw-class vp-cell-relay
                                                                                                          

    
                                                                                                          

                                                                                                          ATM Cell Relay over MPLS in Port Mode
                                                                                                          
      
      
                                                                                                          
The following example shows how to configure interface ATM 5/0 to transport ATM cell relay packets: 
                                                                                                          

      
                                                                                                          pseudowire-class atm-cell-relay
encapsulation mpls
interface atm 5/0 
xconnect 10.0.0.1 123 pw-class atm-cell-relay

                                                                                                          

      
                                                                                                          
The following example shows how to configure interface ATM 9/0/0 to transport ATM cell relay packets on a Cisco 7600 series router, where you must specify the interface ATM slot, bay, and port: 
                                                                                                          

      
                                                                                                          pseudowire-class atm-cell-relay
encapsulation mpls
interface atm 9/0/0 
xconnect 10.0.0.1 500 pw-class atm-cell-relay
                                                                                                          

    
                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          Example  ATM Single Cell Relay over MPLS
                                                                                                          

                                                                                                          
    
                                                                                                          

                                                                                                          ATM Packed Cell Relay over MPLS in VC Mode 
                                                                                                          
      
      
                                                                                                          
The following example shows that ATM PVC 1/100 is an AToM cell relay PVC. There are three timers set up, with values of 1000 milliseconds, 800 milliseconds, and 500 milliseconds, respectively. The cell-packing command specifies that five ATM cells are to be packed into an MPLS packet. The cell-packing command also specifies that timer 1 is to be used. 
                                                                                                          

      
                                                                                                          interface atm 1/0
shutdown
atm mcpt-timer 1000 800 500
no shutdown
pvc 1/100 l2transport
encapsulation aal0
xconnect 10.0.0.1 123 encapsulation mpls
                                                                                                          

      
                                                                                                          
cell-packing 5 mcpt-timer 1
                                                                                                          

    
                                                                                                          

                                                                                                          ATM Packed Cell Relay over MPLS in VC Mode Using VC Class Configuration Mode
                                                                                                          
      
      
                                                                                                          
The following example shows how to configure ATM cell relay over MPLS with cell packing in VC class configuration mode. The VC class is then applied to an interface.
                                                                                                          

      
                                                                                                          enable
configure terminal
vc-class atm cellpacking
encapsulation aal0
cell-packing 10 mcpt-timer 1
interface atm1/0
shutdown
atm mcpt-timers 100 200 250
no shutdown
class-int cellpacking 
pvc 1/200 l2transport
xconnect 10.13.13.13 100 encapsulation mpls

                                                                                                          

      
                                                                                                          
The following example shows how to configure ATM cell relay over MPLS in VC class configuration mode. The VC class is then applied to a PVC.
                                                                                                          

      
                                                                                                          enable
configure terminal
vc-class atm cellpacking 
encapsulation aal0
cell-packing 10 mcpt-timer 1
interface atm1/0
shutdown
atm mcpt-timers 100 200 250
no shutdown
pvc 1/200 l2transport
class-vc cellpacking 
xconnect 10.13.13.13 100 encapsulation mpls
                                                                                                          

    
                                                                                                          

                                                                                                          ATM Packed Cell Relay over MPLS in VP Mode
                                                                                                          
      
      
                                                                                                          
The following example shows packed cell relay enabled on an interface configured for PVP mode. The cell-packing command specifies that 10 ATM cells are to be packed into an MPLS packet. The cell-packing command also specifies that timer 2 is to be used.
                                                                                                          

      
                                                                                                          interface atm 1/0
shutdown
atm mcpt-timer 1000 800 500
no shutdown
atm pvp 100 l2transport
xconnect 10.0.0.1 234 encapsulation mpls
cell-packing 10 mcpt-timer 2
                                                                                                          

    
                                                                                                          

                                                                                                          ATM Packed Cell Relay over MPLS in Port Mode
                                                                                                          
      
      
                                                                                                          
The following example shows packed cell relay enabled on an interface set up for port mode. The cell-packing command specifies that 10 ATM cells are to be packed into an MPLS packet. The cell-packing command also specifies that timer 2 is to be used.
                                                                                                          

      
                                                                                                          interface atm 5/0 
shutdown
atm mcpt-timer 1000 800 500
no shutdown
cell-packing 10 mcpt-timer 2
xconnect 10.0.0.1 123 encapsulation mpls
                                                                                                          

    
                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          Example  Ethernet over MPLS
                                                                                                          

                                                                                                          
    
                                                                                                          

                                                                                                          Ethernet over MPLS in Port Mode
                                                                                                          
      
      
                                                                                                          
The following example shows how to configure VC 123 in Ethernet port mode:
                                                                                                          

      
                                                                                                          pseudowire-class ethernet-port
encapsulation mpls
 
int gigabitethernet1/0 
xconnect 10.0.0.1 123 pw-class ethernet-port
                                                                                                          

    
                                                                                                          

                                                                                                          Ethernet over MPLS with VLAN ID Rewrite
                                                                                                          
      
      
                                                                                                          
The following example shows how to configure VLAN ID rewrite on peer PE routers with Cisco 12000 series router engine 2 3-port Gigabit Ethernet line cards.
                                                                                                          

      

                                                                                                          
                
                                                                                                          
PE1
                                                                                                          

                                                                                                                        		

                
                                                                                                          
PE2
                                                                                                          

                                                                                                                        		

                                                                                                          
                                                                                                          

                                                                                                          
                
                                                                                                          interface GigabitEthernet0/0.2
encapsulation dot1Q 2
no ip directed-broadcast
no cdp enable
xconnect 10.5.5.5 2 encapsulation mpls
remote circuit id 3
                                                                                                          

              
                                                                                                          
                                                                                                          		

                                                                                                          
                
                                                                                                          interface GigabitEthernet3/0.2
encapsulation dot1Q 3
no ip directed-broadcast
no cdp enable
xconnect 10.3.3.3 2 encapsulation mpls
remote circuit id 2
                                                                                                          

              
                                                                                                          
                                                                                                          		

                                                                                                          
                                                                                                          

                                                                                                          

                                                                                                          

    
                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          Example  Tunnel Selection
                                                                                                          

                                                                                                          
      
                                                                                                          
The following example shows how to set up two preferred paths for PE1. One preferred path specifies an MPLS traffic engineering tunnel. The other preferred path specifies an IP address of a loopback address on PE2. There is a static route configured on PE1 that uses a TE tunnel to reach the IP address on PE2. 
                                                                                                          

    
                                                                                                          

                                                                                                          PE1 Configuration 
                                                                                                          
      
      
                                                                                                          mpls label protocol ldp
mpls traffic-eng tunnels
tag-switching tdp router-id Loopback0
pseudowire-class pw1
 encapsulation mpls
 preferred-path interface Tunnel1 disable-fallback
!
pseudowire-class pw2
 encapsulation mpls
 preferred-path peer 10.18.18.18
!
interface Loopback0
 ip address 10.2.2.2 255.255.255.255
 no ip directed-broadcast
 no ip mroute-cache
!
interface Tunnel1
 ip unnumbered Loopback0
 no ip directed-broadcast
 tunnel destination 10.16.16.16
 tunnel mode mpls traffic-eng
 tunnel mpls traffic-eng priority 7 7
 tunnel mpls traffic-eng bandwidth 1500
 tunnel mpls traffic-eng path-option 1 explicit name path-tu1
!
interface Tunnel2
 ip unnumbered Loopback0
 no ip directed-broadcast
 tunnel destination 10.16.16.16
 tunnel mode mpls traffic-eng
 tunnel mpls traffic-eng priority 7 7
 tunnel mpls traffic-eng bandwidth 1500
 tunnel mpls traffic-eng path-option 1 dynamic
!
interface gigabitethernet0/0/0
 no ip address
 no ip directed-broadcast
 no negotiation auto
!
interface gigabitethernet0/0/0.1
 encapsulation dot1Q 222
 no ip directed-broadcast
 xconnect 10.16.16.16 101 pw-class pw1
!
interface ATM1/0/0
 no ip address
 no ip directed-broadcast
 no atm enable-ilmi-trap
 no atm ilmi-keepalive
 pvc 0/50 l2transport
  encapsulation aal5
  xconnect 10.16.16.16 150 pw-class pw2
!
interface Ethernet2/0/1
 ip address 10.0.0.1 255.255.255.0
 no ip directed-broadcast
 tag-switching ip
 mpls traffic-eng tunnels
 ip rsvp bandwidth 15000 15000
!
router ospf 1
 log-adjacency-changes
 network 10.0.0.0 0.0.0.255 area 0
 network 10.2.2.2 0.0.0.0 area 0
 mpls traffic-eng router-id Loopback0
 mpls traffic-eng area 0
!
ip route 10.18.18.18 255.255.255.255 Tunnel2
!
ip explicit-path name path-tu1 enable
 next-address 10.0.0.1
 index 3 next-address 10.0.0.1
                                                                                                          

    
                                                                                                          

                                                                                                          PE2 Configuration 
                                                                                                          
      
      
                                                                                                          mpls label protocol ldp
mpls traffic-eng tunnels
mpls ldp router-id Loopback0
interface Loopback0
 ip address 10.16.16.16 255.255.255.255
 no ip directed-broadcast
 no ip mroute-cache
!
interface Loopback2
 ip address 10.18.18.18 255.255.255.255
 no ip directed-broadcast
!
interface Ethernet3/1
 ip address 10.0.0.2 255.255.255.0
 no ip directed-broadcast
 mpls traffic-eng tunnels
 mpls ip
 no cdp enable
 ip rsvp bandwidth 15000 15000
!
interface Ethernet3/3 
 no ip address 
 no ip directed-broadcast 
 no cdp enable 
! 
interface Ethernet3/3.1 
 encapsulation dot1Q 222 
 no ip directed-broadcast 
 no cdp enable 
 mpls l2transport route 10.2.2.2 101 
! 
interface ATM5/0
 no ip address
 no ip directed-broadcast
 no atm enable-ilmi-trap
 no atm ilmi-keepalive
 pvc 0/50 l2transport
  encapsulation aal5
  xconnect 10.2.2.2 150 encapsulation mpls
!
router ospf 1
 log-adjacency-changes
 network 10.0.0.0 0.0.0.255 area 0
 network 10.16.16.16 0.0.0.0 area 0
 mpls traffic-eng router-id Loopback0
 mpls traffic-eng area 0
                                                                                                          

    
                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          Example  Setting Frame Relay Discard Eligibility Bit on the Cisco 7200 and 7500 Series Routers
                                                                                                          

                                                                                                          
      
                                                                                                          
The following example shows how to configure the service policy called set-de and attach it to an interface. In this example, the class map called data evaluates all packets exiting the interface for an IP precedence value of 1. If the exiting packet has been marked with the IP precedence value of 1, the packet’s DE bit is set to 1.
                                                                                                          

      
                                                                                                          class-map data 
match ip precedence 1 
policy-map set-de 
class data 
set fr-de 
interface Serial0/0/0 
encapsulation frame-relay 
interface Serial0/0/0.1 point-to-point 
ip address 192.168.249.194 255.255.255.252 
frame-relay interface-dlci 100 
service output set-de 
                                                                                                          

    
                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          Example  Matching Frame Relay DE Bit on the Cisco 7200 and 7500 Series Routers
                                                                                                          

                                                                                                          
      
                                                                                                          
The following example shows how to configure the service policy called match-de and attach it to an interface. In this example, the class map called data evaluates all packets entering the interface for a DE bit setting of 1. If the entering packet has been a DE bit value of 1, the packet’s EXP bit setting is set to 3.
                                                                                                          

      
                                                                                                          class-map data 
match fr-de 
policy-map match-de
class data 
set mpls exp 3 
ip routing 
ip cef distributed 
mpls label protocol ldp 
interface Loopback0 
 ip address 10.20.20.20 255.255.255.255 
interface Ethernet1/0/0 
 ip address 10.0.0.2 255.255.255.0 
 mpls ip 
interface Serial4/0/0 
 encapsulation frame-relay 
service input match-de 
connect 100 Serial4/0/0 100 l2transport 
                                                                                                          

      
                                                                                                          
 xconnect 10.10.10.10 100 encapsulation mpls
                                                                                                          

    
                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          Example ATM over MPLS
                                                                                                          

                                                                                                           
		
                                                                                                           The table below shows the configuration of ATM over MPLS on two PE routers. 
		
                                                                                                          
 
		

                                                                                                          Table 8 ATM over MPLS Configuration Example
                                                                                                           
				  
                                                                                                           PE1 
				  
                                                                                                          
 
				                                                                                                          		
 
				  
                                                                                                           PE2 
				  
                                                                                                          
 
				                                                                                                          		

                                                                                                          
                                                                                                          

                                                                                                           
				  
                                                                                                          mpls label protocol ldp
                                                                                                          
 
				  
                                                                                                           mpls ldp router-id Loopback0 force
                                                                                                          
 
				  
                                                                                                          !
                                                                                                          
 
				  
                                                                                                          interface Loopback0
                                                                                                          
 
				  
                                                                                                           ip address 10.16.12.12 255.255.255.255
                                                                                                          
 
				  
                                                                                                          ! 
                                                                                                          
 
				  
                                                                                                          interface ATM4/0
                                                                                                          
 
				  
                                                                                                           pvc 0/100 l2transport
                                                                                                          
 
				  
                                                                                                             encapsulation aal0
                                                                                                          
 
				  
                                                                                                             xconnect 10.13.13.13 100 encapsulation mpls
                                                                                                          
 
				  
                                                                                                          ! 
                                                                                                          
 
				  
                                                                                                          interface ATM4/0.300 point-to-point
                                                                                                          
 
				  
                                                                                                           no ip directed-broadcast
                                                                                                          
 
				  
                                                                                                           no atm enable-ilmi-trap
                                                                                                          
 
				  
                                                                                                           pvc 0/300 l2transport
                                                                                                          
 
				  
                                                                                                             encapsulation aal0
                                                                                                          
 
				  
                                                                                                             xconnect 10.13.13.13 300 encapsulation mpls
                                                                                                          
 
				
                                                                                                          
                                                                                                          		

                                                                                                           
				  
                                                                                                          mpls label protocol ldp
                                                                                                          
 
				  
                                                                                                           mpls ldp router-id Loopback0 force
                                                                                                          
 
				  
                                                                                                          !
                                                                                                          
 
				  
                                                                                                          interface Loopback0
                                                                                                          
 
				  
                                                                                                           ip address 10.13.13.13 255.255.255.255
                                                                                                          
 
				  
                                                                                                           
                                                                                                          
 
				  
                                                                                                          interface ATM4/0
                                                                                                          
 
				  
                                                                                                            pvc 0/100 l2transport
                                                                                                          
 
				  
                                                                                                              encapsulation aal0
                                                                                                          
 
				  
                                                                                                              xconnect 10.16.12.12 100 encapsulation mpls
                                                                                                          
 
				  
                                                                                                          !
                                                                                                          
 
				  
                                                                                                          interface ATM4/0.300 point-to-point
                                                                                                          
 
				  
                                                                                                           no ip directed-broadcast
                                                                                                          
 
				  
                                                                                                           no atm enable-ilmi-trap
                                                                                                          
 
				  
                                                                                                           pvc 0/300 l2transport
                                                                                                          
 
				  
                                                                                                             encapsulation aal0
                                                                                                          
 
				  
                                                                                                             xconnect 10.16.12.12 300 encapsulation mpls
                                                                                                          
 
				
                                                                                                          
                                                                                                          		

                                                                                                          
                                                                                                          

                                                                                                          

                                                                                                          
 
	 
                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          Example Ethernet over MPLS with MPLS Traffic Engineering Fast Reroute
                                                                                                          

                                                                                                           
		
                                                                                                           The following configuration example and the figure below show the configuration of Ethernet over MPLS with fast reroute on AToM PE routers. 
		
                                                                                                          
 
		
                                                                                                           Routers PE1 and PE2 have the following characteristics: 
		
                                                                                                          
 
		
                                                                                                          •  A TE tunnel called Tunnel41 is configured between PE1and PE2, using an explicit path through a link called L1. AToM VCs are configured to travel through the FRR-protected tunnel Tunnel41. 
		  

                                                                                                            • 

                                                                                                          •  The link L1 is protected by FRR, the backup tunnel is Tunnel1. 
		  

                                                                                                            • 

                                                                                                          •  PE2 is configured to forward the AToM traffic back to PE1 through the L2 link. 
		  

                                                                                                            • 

                                                                                                          
 
		
                                                                                                          Figure 2. Fast Reroute Configuration

                                                                                                          
 
		
                                                                                                           PE1 Configuration 
		
                                                                                                          
 
		
                                                                                                          mpls label protocol ldp
mpls traffic-eng tunnels
mpls ldp router-id Loopback1 force
!
pseudowire-class T41
 encapsulation mpls
 preferred-path interface Tunnel41 disable-fallback
!
pseudowire-class IP1
 encapsulation mpls
 preferred-path peer 10.4.0.1 disable-fallback
!
interface Loopback1
 ip address 10.0.0.27 255.255.255.255
!
interface Tunnel1
 ip unnumbered Loopback1
 tunnel destination 10.0.0.1
 tunnel mode mpls traffic-eng
 tunnel mpls traffic-eng priority 1 1
 tunnel mpls traffic-eng bandwidth 10000
 tunnel mpls traffic-eng path-option 1 explicit name FRR
!
interface Tunnel41
 ip unnumbered Loopback1
 tunnel destination 10.0.0.4
 tunnel mode mpls traffic-eng
 tunnel mpls traffic-eng priority 1 1
 tunnel mpls traffic-eng bandwidth 1000
 tunnel mpls traffic-eng path-option 1 explicit name name-1
 tunnel mpls traffic-eng fast-reroute
!
interface POS0/0
 description pe1name POS8/0/0
 ip address 10.1.0.2 255.255.255.252
 mpls traffic-eng tunnels
 mpls traffic-eng backup-path Tunnel1
 crc 16
 clock source internal
 pos ais-shut
 pos report lrdi
 ip rsvp bandwidth 155000 155000
!
interface POS0/3
 description pe1name POS10/1/0
 ip address 10.1.0.14 255.255.255.252
 mpls traffic-eng tunnels
 crc 16   
 clock source internal
 ip rsvp bandwidth 155000 155000
!
interface gigabitethernet3/0.1
 encapsulation dot1Q 203
 xconnect 10.0.0.4 2 pw-class IP1
!         
interface gigabitethernet3/0.2
 encapsulation dot1Q 204
 xconnect 10.0.0.4 4 pw-class T41
!
router ospf 1
 network 10.0.0.0 0.255.255.255 area 0
 mpls traffic-eng router-id Loopback1
 mpls traffic-eng area 0
!
ip classless
ip route 10.4.0.1 255.255.255.255 Tunnel41
!
ip explicit-path name xxxx-1 enable
 next-address 10.4.1.2
 next-address 10.1.0.10
                                                                                                          
 
	 
                                                                                                          

                                                                                                          P Configuration
                                                                                                           
		 
		
                                                                                                          ip cef
mpls traffic-eng tunnels
!
interface Loopback1
 ip address 10.0.0.1 255.255.255.255
!
interface FastEthernet1/0/0
 ip address 10.4.1.2 255.255.255.0
 mpls traffic-eng tunnels
 ip rsvp bandwidth 10000 10000
!
interface POS8/0/0
 description xxxx POS0/0
 ip address 10.1.0.1 255.255.255.252
 mpls traffic-eng tunnels
 pos ais-shut
 pos report lrdi
 ip rsvp bandwidth 155000 155000
!
interface POS10/1/0
 description xxxx POS0/3
 ip address 10.1.0.13 255.255.255.252
 mpls traffic-eng tunnels
 ip rsvp bandwidth 155000 155000
!
router ospf 1
 network 10.0.0.0 0.255.255.255 area 0
 mpls traffic-eng router-id Loopback1
 mpls traffic-eng area 0
                                                                                                          
 
	 
                                                                                                          

                                                                                                          PE2 Configuration 
                                                                                                           
		 
		
                                                                                                          ip cef
mpls label protocol ldp
mpls traffic-eng tunnels
mpls ldp router-id Loopback1 force
!
interface Loopback1
 ip address 10.0.0.4 255.255.255.255
!
interface loopback 2
ip address 10.4.0.1 255.255.255.255
!
interface Tunnel27
 ip unnumbered Loopback1
 tunnel destination 10.0.0.27
 tunnel mode mpls traffic-eng
 tunnel mpls traffic-eng autoroute announce
 tunnel mpls traffic-eng priority 1 1
 tunnel mpls traffic-eng bandwidth 1000
 tunnel mpls traffic-eng path-option 1 explicit name xxxx-1
!
interface FastEthernet0/0.2
 encapsulation dot1Q 203
 xconnect 10.0.0.27 2 encapsulation mpls
!
interface FastEthernet0/0.3
 encapsulation dot1Q 204
 xconnect 10.0.0.27 4 encapsulation mpls 
!
interface FastEthernet1/1
 ip address 10.4.1.1 255.255.255.0
 mpls traffic-eng tunnels
 ip rsvp bandwidth 10000 10000
!
router ospf 1
 network 10.0.0.0 0.255.255.255 area 0
 mpls traffic-eng router-id Loopback1
 mpls traffic-eng area 0
!
ip explicit-path name xxxx-1 enable
 next-address 10.4.1.2
 next-address 10.1.0.10
                                                                                                          
 
	 
                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          Example Configuring per-Subinterface MTU for Ethernet over MPLS
                                                                                                          

                                                                                                           
		
                                                                                                           The figure below shows a configuration that enables matching MTU values between VC endpoints. 
		
                                                                                                          
 
		
                                                                                                           As shown in the figure below, PE1 is configured in xconnect subinterface configuration mode with an MTU value of 1500 bytes in order to establish an end-to-end VC with PE2, which also has an MTU value of 1500 bytes. If PE1 was not set with an MTU value of 1500 bytes, in xconnect subinterface configuration mode, the subinterface would inherit the MTU value of 2000 bytes set on the interface. This would cause a mismatch in MTU values between the VC endpoints, and the VC would not come up. 
		
                                                                                                          
 
		
                                                                                                          Figure 3. Configuring MTU Values in xconnect Subinterface Configuration Mode

                                                                                                          
 
		
                                                                                                           The following examples show the router configurations in the figure above: 
		
                                                                                                          
 
	 
                                                                                                          

                                                                                                          CE1 Configuration
                                                                                                           
		 
		
                                                                                                          interface gigabitethernet0/0
 mtu 1500
 no ip address
!
interface gigabitethernet0/0.1
 encapsulation dot1Q 100
 ip address 10.181.182.1 255.255.255.0
                                                                                                          
 
	 
                                                                                                          

                                                                                                          PE1 Configuration
                                                                                                           
		 
		
                                                                                                          interface gigabitethernet0/0
 mtu 2000
 no ip address
!
interface gigabitethernet0/0.1
 encapsulation dot1Q 100
 xconnect 10.1.1.152 100 encapsulation mpls
  mtu 1500
!
interface gigabitethernet0/0.2
 encapsulation dot1Q 200
 ip address 10.151.100.1 255.255.255.0
 mpls ip
                                                                                                          
 
	 
                                                                                                          

                                                                                                          PE2 Configuration
                                                                                                           
		 
		
                                                                                                          interface gigabitethernet1/0
 mtu 2000
 no ip address
!
interface gigabitethernet1/0.2
 encapsulation dot1Q 200
 ip address 10.100.152.2 255.255.255.0
 mpls ip
!
interface fastethernet0/0
 no ip address
!
interface fastethernet0/0.1
 description default MTU of 1500 for FastEthernet
 encapsulation dot1Q 100
 xconnect 10.1.1.151 100 encapsulation mpls
                                                                                                          
 
	 
                                                                                                          

                                                                                                          CE2 Configuration
                                                                                                           
		 
		
                                                                                                          interface fastethernet0/0
 no ip address
interface fastethernet0/0.1
 encapsulation dot1Q 100
 ip address 10.181.182.2 255.255.255.0

                                                                                                          
 
		
                                                                                                           The 
		  show 
			 mpls 
			 l2transport 
			 bindingcommand, issued from router PE1, shows a matching MTU value of 1500 bytes on both the local and remote routers: 
		
                                                                                                          
 
		
                                                                                                          Router# show mpls l2transport binding 
Destination Address: 10.1.1.152,  VC ID: 100
    Local Label: 100
        Cbit: 1,    VC Type: Ethernet,    GroupID: 0
        MTU: 1500,   Interface Desc: n/a
        VCCV: CC Type: CW [1], RA [2]
              CV Type: LSPV [2]
    Remote Label: 202
        Cbit: 1,    VC Type: Ethernet,    GroupID: 0
        MTU: 1500,   Interface Desc: n/a
        VCCV: CC Type: RA [2]
              CV Type: LSPV [2]
                                                                                                          
 
		
                                                                                                           
		
                                                                                                          
 
		
                                                                                                          Router# show mpls l2transport vc detail
Local interface: Gi0/0.1 up, line protocol up, Eth VLAN 100 up
  Destination address: 10.1.1.152, VC ID: 100, VC status: up
    Output interface: Gi0/0.2, imposed label stack {202}
    Preferred path: not configured  
    Default path: active
    Next hop: 10.151.152.2
  Create time: 1d11h, last status change time: 1d11h
  Signaling protocol: LDP, peer 10.1.1.152:0 up
    Targeted Hello: 10.1.1.151(LDP Id) -> 10.1.1.152
    MPLS VC labels: local 100, remote 202 
    Group ID: local 0, remote 0
    MTU: local 1500, remote 1500
    Remote interface description: 
  Sequencing: receive disabled, send disabled
  VC statistics:
    packet totals: receive 41, send 39
    byte totals:   receive 4460, send 5346
    packet drops:  receive 0, send 0
                                                                                                          
 
		
                                                                                                           In the following example, you are specifying an MTU of 1501 in xconnect subinterface configuration mode, and that value is out of range, the router enters the command in subinterface configuration mode, where it is accepted: 
		
                                                                                                          
 
		
                                                                                                          Router# configure terminal
router(config)# interface gigabitethernet0/2.1
router(config-subif)# xconnect 10.10.10.1 100 encapsulation mpls
router(config-subif-xconn)# mtu ?
<64 - 1500> MTU size in bytes
router(config-subif-xconn)# mtu 1501
router(config-subif)# mtu ?
<64 - 17940> MTU size in bytes

                                                                                                          
 
		
                                                                                                           If the MTU value is not accepted in either xconnect subinterface configuration mode or subinterface configuration mode, then the command is rejected, as shown in the following example: 
		
                                                                                                          
 
		
                                                                                                          Router# configure terminal
router(config)# interface gigabitethernet0/2.1
router(config-subif)# xconnect 10.10.10.1 100 encapsulation mpls
router(config-subif-xconn)# mtu ?
<64 - 1500> MTU size in bytes
router(config-subif-xconn)# mtu 63
% Invalid input detected at ^ marker
                                                                                                          
 
	 
                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          Example  Configuring MTU Values in xconnect Configuration Mode for L2VPN Interworking
                                                                                                          

                                                                                                          
      
                                                                                                          
The following example shows an L2VPN Interworking example. The PE1 router has a serial interface configured with an MTU value of 1492 bytes. The PE2 router uses xconnect configuration mode to set a matching MTU of 1492 bytes, which allows the two routers to form an interworking VC. If the PE2 router did not set the MTU value in xconnect configuration mode, the interface would be set to 
1500 bytes by default and the VC would not come up. 
                                                                                                          

    
                                                                                                          

                                                                                                          PE1 Configuration 
                                                                                                          
      
      
                                                                                                          pseudowire-class atom-ipiw
 encapsulation mpls
 interworking ip 
!
interface Loopback0
 ip address 10.1.1.151 255.255.255.255
!
interface Serial2/0
 mtu 1492 
 no ip address
 encapsulation ppp
 no fair-queue
 serial restart-delay 0
 xconnect 10.1.1.152 123 pw-class atom-ipiw
!
interface Serial4/0
 ip address 10.151.100.1 255.255.255.252
 encapsulation ppp
 mpls ip
 serial restart-delay 0
!
router ospf 1
 log-adjacency-changes
 network 10.1.1.151 0.0.0.0 area 0
 network 10.151.100.0 0.0.0.3 area 0
!
mpls ldp router-id Loopback0
                                                                                                          

    
                                                                                                          

                                                                                                          PE2 Configuration 
                                                                                                          
      
      
                                                                                                          pseudowire-class atom-ipiw
 encapsulation mpls
 interworking ip 
!
interface Loopback0
 ip address 10.1.1.152 255.255.255.255
!
interface Ethernet0/0 
 no ip address
 xconnect 10.1.1.151 123 pw-class atom-ipiw
  mtu 1492 
!
interface Serial4/0
 ip address 10.100.152.2 255.255.255.252
 encapsulation ppp
 mpls ip
 serial restart-delay 0
!
router ospf 1
 log-adjacency-changes
 network 10.1.1.152 0.0.0.0 area 0
 network 10.100.152.0 0.0.0.3 area 0
!
mpls ldp router-id Loopback0

                                                                                                          

      
                                                                                                          
The show mpls l2transport bindingcommand shows that the MTU value for the local and remote routers is 1492 bytes. 
                                                                                                          

    
                                                                                                          

                                                                                                          PE1 Configuration
                                                                                                          
      
      
                                                                                                          Router# show mpls l2transport binding
 
Destination Address: 10.1.1.152,  VC ID: 123
    Local Label: 105
        Cbit: 1,    VC Type: PPP,    GroupID: 0
        MTU: 1492,   Interface Desc: n/a
        VCCV: CC Type: CW [1], RA [2]
              CV Type: LSPV [2]
    Remote Label: 205
        Cbit: 1,    VC Type: Ethernet,    GroupID: 0
        MTU: 1492,   Interface Desc: n/a
        VCCV: CC Type: RA [2]
              CV Type: LSPV [2]
Router# show mpls l2transport vc detail
Local interface: Se2/0 up, line protocol up, PPP up
  MPLS VC type is PPP, interworking type is IP 
  Destination address: 10.1.1.152, VC ID: 123, VC status: up
    Output interface: Se4/0, imposed label stack {1003 205}
    Preferred path: not configured  
    Default path: active
    Next hop: point2point
  Create time: 00:25:29, last status change time: 00:24:54
  Signaling protocol: LDP, peer 10.1.1.152:0 up
    Targeted Hello: 10.1.1.151(LDP Id) -> 10.1.1.152
    Status TLV support (local/remote)   : enabled/supported
      Label/status state machine        : established, LruRru
      Last local dataplane   status rcvd: no fault
      Last local SSS circuit status rcvd: no fault
      Last local SSS circuit status sent: no fault
      Last local  LDP TLV    status sent: no fault
      Last remote LDP TLV    status rcvd: no fault
    MPLS VC labels: local 105, remote 205 
    Group ID: local n/a, remote 0
    MTU: local 1492, remote 1492
    Remote interface description: 
  Sequencing: receive disabled, send disabled
  VC statistics:
    packet totals: receive 30, send 29
    byte totals:   receive 2946, send 3364
    packet drops:  receive 0, send 0
                                                                                                          

    
                                                                                                          

                                                                                                          PE2 Configuration
                                                                                                          
      
      
                                                                                                          Router# show mpls l2transport binding
 
Destination Address: 10.1.1.151,  VC ID: 123
    Local Label: 205
        Cbit: 1,    VC Type: Ethernet,    GroupID: 0
        MTU: 1492,   Interface Desc: n/a
        VCCV: CC Type: RA [2]
              CV Type: LSPV [2]
    Remote Label: 105
        Cbit: 1,    VC Type: Ethernet,    GroupID: 0
        MTU: 1492,   Interface Desc: n/a
        VCCV: CC Type: CW [1], RA [2]
              CV Type: LSPV [2]
Router# show mpls l2transport vc detail
Local interface: Et0/0 up, line protocol up, Ethernet up
  MPLS VC type is Ethernet, interworking type is IP
  Destination address: 10.1.1.151, VC ID: 123, VC status: up
    Output interface: Se4/0, imposed label stack {1002 105}
    Preferred path: not configured  
    Default path: active
    Next hop: point2point
  Create time: 00:25:19, last status change time: 00:25:19
  Signaling protocol: LDP, peer 10.1.1.151:0 up
    Targeted Hello: 10.1.1.152(LDP Id) -> 10.1.1.151
    Status TLV support (local/remote)   : enabled/supported
      Label/status state machine        : established, LruRru
      Last local dataplane   status rcvd: no fault
      Last local SSS circuit status rcvd: no fault
      Last local SSS circuit status sent: no fault
      Last local  LDP TLV    status sent: no fault
      Last remote LDP TLV    status rcvd: no fault
    MPLS VC labels: local 205, remote 105 
    Group ID: local n/a, remote 0
    MTU: local 1492, remote 1492 
    Remote interface description: 
  Sequencing: receive disabled, send disabled
  VC statistics:
    packet totals: receive 29, send 30
    byte totals:   receive 2900, send 3426
    packet drops:  receive 0, send 0

                                                                                                          

    
                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          Example  Removing a Pseudowire
                                                                                                          

                                                                                                          
      
                                                                                                          
The following example shows how to remove all xconnects:
                                                                                                          

      
                                                                                                          Router# clear xconnect all
02:13:56: Xconnect[ac:Et1/0.1(Eth VLAN)]: provisioning fwder with fwd_type=1, sss_role=1
02:13:56: Xconnect[mpls:10.1.1.2:1234000]: provisioning fwder with fwd_type=2, sss_role=2
02:13:56: Xconnect[ac:Et1/0.2(Eth VLAN)]: provisioning fwder with fwd_type=1, sss_role=2
02:13:56: Xconnect[mpls:10.1.1.2:1234001]: provisioning fwder with fwd_type=2, sss_role=1
02:13:56: Xconnect[ac:Et1/0.3(Eth VLAN)]: provisioning fwder with fwd_type=1, sss_role=1
02:13:56: Xconnect[mpls:10.1.2.2:1234002]: provisioning fwder with fwd_type=2, sss_role=2
02:13:56: Xconnect[ac:Et1/0.4(Eth VLAN)]: provisioning fwder with fwd_type=1, sss_role=2
02:13:56: Xconnect[mpls:10.1.2.2:1234003]: provisioning fwder with fwd_type=2, sss_role=1
02:13:56: MPLS peer 10.1.1.2 vcid 1234000, VC DOWN, VC state DOWN
02:13:56: MPLS peer 10.1.1.2 vcid 1234001, VC DOWN, VC state DOWN
02:13:56: MPLS peer 10.1.2.2 vcid 1234002, VC DOWN, VC state DOWN
02:13:56: MPLS peer 10.1.2.2 vcid 1234003, VC DOWN, VC state DOWN
02:13:56: XC AUTH [Et1/0.1, 1001]: Event: start xconnect authorization, state changed from IDLE to AUTHORIZING
02:13:56: XC AUTH [Et1/0.1, 1001]: Event: found xconnect authorization, state changed from AUTHORIZING to DONE
02:13:56: XC AUTH [Et1/0.3, 1003]: Event: start xconnect authorization, state changed from IDLE to AUTHORIZING
02:13:56: XC AUTH [Et1/0.3, 1003]: Event: found xconnect authorization, state changed from AUTHORIZING to DONE
02:13:56: XC AUTH [10.1.1.2, 1234001]: Event: start xconnect authorization, state changed from IDLE to AUTHORIZING
02:13:56: XC AUTH [10.1.1.2, 1234001]: Event: found xconnect authorization, state changed from AUTHORIZING to DONE
02:13:56: XC AUTH [10.1.2.2, 1234003]: Event: start xconnect authorization, state changed from IDLE to AUTHORIZING
02:13:56: XC AUTH [10.1.2.2, 1234003]: Event: found xconnect authorization, state changed from AUTHORIZING to DONE
02:13:56: XC AUTH [Et1/0.1, 1001]: Event: free xconnect authorization request, state changed from DONE to END
02:13:56: XC AUTH [Et1/0.3, 1003]: Event: free xconnect authorization request, state changed from DONE to END
02:13:56: XC AUTH [10.1.1.2, 1234001]: Event: free xconnect authorization request, state changed from DONE to END
02:13:56: XC AUTH [10.1.2.2, 1234003]: Event: free xconnect authorization request, state changed from DONE to END
02:13:56: MPLS peer 10.1.1.2 vcid 1234001, VC UP, VC state UP
02:13:56: MPLS peer 10.1.2.2 vcid 1234003, VC UP, VC state UP
02:13:56: MPLS peer 10.1.1.2 vcid 1234000, VC UP, VC state UP
02:13:56: MPLS peer 10.1.2.2 vcid 1234002, VC UP, VC state UP

                                                                                                          

      
                                                                                                          
The following example shows how to remove all the xconnects associated with peer router 10.1.1.2:
                                                                                                          

      
                                                                                                          Router# clear xconnect peer 10.1.1.2 all
02:14:08: Xconnect[ac:Et1/0.1(Eth VLAN)]: provisioning fwder with fwd_type=1, sss_role=1
02:14:08: Xconnect[mpls:10.1.1.2:1234000]: provisioning fwder with fwd_type=2, sss_role=2
02:14:08: Xconnect[ac:Et1/0.2(Eth VLAN)]: provisioning fwder with fwd_type=1, sss_role=2
02:14:08: Xconnect[mpls:10.1.1.2:1234001]: provisioning fwder with fwd_type=2, sss_role=1
02:14:08: MPLS peer 10.1.1.2 vcid 1234000, VC DOWN, VC state DOWN
02:14:08: MPLS peer 10.1.1.2 vcid 1234001, VC DOWN, VC state DOWN
02:14:08: XC AUTH [Et1/0.1, 1001]: Event: start xconnect authorization, state changed from IDLE to AUTHORIZING
02:14:08: XC AUTH [Et1/0.1, 1001]: Event: found xconnect authorization, state changed from AUTHORIZING to DONE
02:14:08: XC AUTH [10.1.1.2, 1234001]: Event: start xconnect authorization, state changed from IDLE to AUTHORIZING
02:14:08: XC AUTH [10.1.1.2, 1234001]: Event: found xconnect authorization, state changed from AUTHORIZING to DONE
02:14:08: XC AUTH [Et1/0.1, 1001]: Event: free xconnect authorization request, state changed from DONE to END
02:14:08: XC AUTH [10.1.1.2, 1234001]: Event: free xconnect authorization request, state changed from DONE to END
02:14:08: MPLS peer 10.1.1.2 vcid 1234001, VC UP, VC state UP
02:14:08: MPLS peer 10.1.1.2 vcid 1234000, VC UP, VC state UP

                                                                                                          

      
                                                                                                          
The following example shows how to remove the xconnects associated with peer router 10.1.1.2 and VC ID 1234001:
                                                                                                          

      
                                                                                                          Router# clear xconnect peer 10.1.1.2 vcid 1234001
02:14:23: Xconnect[ac:Et1/0.2(Eth VLAN)]: provisioning fwder with fwd_type=1, sss_role=1
02:14:23: Xconnect[mpls:10.1.1.2:1234001]: provisioning fwder with fwd_type=2, sss_role=2
02:14:23: MPLS peer 10.1.1.2 vcid 1234001, VC DOWN, VC state DOWN
02:14:23: XC AUTH [Et1/0.2, 1002]: Event: start xconnect authorization, state changed from IDLE to AUTHORIZING
02:14:23: XC AUTH [Et1/0.2, 1002]: Event: found xconnect authorization, state changed from AUTHORIZING to DONE
02:14:23: XC AUTH [Et1/0.2, 1002]: Event: free xconnect authorization request, state changed from DONE to END
02:14:23: MPLS peer 10.1.1.2 vcid 1234001, VC UP, VC state UP
                                                                                                          

      
                                                                                                          
The following example shows how to remove the xconnects associated with interface Ethernet 1/0.1:
                                                                                                          

      
                                                                                                          Router# clear xconnect interface eth1/0.1
 
02:14:48: Xconnect[ac:Et1/0.1(Eth VLAN)]: provisioning fwder with fwd_type=1, sss_role=2
02:14:48: Xconnect[mpls:10.1.1.2:1234000]: provisioning fwder with fwd_type=2, sss_role=1
02:14:48: MPLS peer 10.1.1.2 vcid 1234000, VC DOWN, VC state DOWN
02:14:48: XC AUTH [10.1.1.2, 1234000]: Event: start xconnect authorization, state changed from IDLE to AUTHORIZING
02:14:48: XC AUTH [10.1.1.2, 1234000]: Event: found xconnect authorization, state changed from AUTHORIZING to DONE
02:14:48: XC AUTH [10.1.1.2, 1234000]: Event: free xconnect authorization request, state changed from DONE to END
                                                                                                          

    
                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          Additional References
                                                                                                          

                                                                                                           
	 
                                                                                                          

                                                                                                          Related Documents
                                                                                                           
		 
		

                                                                                                           
					 
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                                                                                                           Cisco IOS commands
					 
                                                                                                          
 
				                                                                                                            		
 
					 
                                                                                                           
						Cisco IOS Master Commands List, All Releases 
					 
                                                                                                          
 
				                                                                                                            		

                                                                                                          

                                                                                                           
					 
                                                                                                           MPLS commands
					 
                                                                                                          
 
				                                                                                                            		
 
					 
                                                                                                          Cisco IOS Multiprotocol Label Switching Command Reference 
						 
					 
                                                                                                          
 
				                                                                                                            		

                                                                                                          

                                                                                                           
					 
                                                                                                           Any Transport over MPLS
					 
                                                                                                          
 
				                                                                                                            		
 
					 
                                                                                                           “Overview” section of 
						Cisco Any Transport over MPLS
					 
                                                                                                          
 
				                                                                                                            		

                                                                                                          

                                                                                                           
					 
                                                                                                           Any Transport over MPLS for the Cisco 10000 series router 
					 
                                                                                                          
 
				                                                                                                            		
 
					 
                                                                                                           
						Cisco 10000 Series Router Broadband Aggregation, Leased-Line, and MPLS Configuration Guide 
					 
                                                                                                          
 
				                                                                                                            		

                                                                                                          

                                                                                                           
					 
                                                                                                           Layer 2 Tunnel Protocol Version 3 (L2TPv3)
					 
                                                                                                          
 
				                                                                                                            		
 
					 
                                                                                                           Layer 2 Tunnel Protocol Version 3 (L2TPv3) 
					 
                                                                                                          
 
				                                                                                                            		

                                                                                                          

                                                                                                           
					 
                                                                                                           L2VPN interworking
					 
                                                                                                          
 
				                                                                                                            		
 
					 
                                                                                                           L2VPN Interworking 
					 
                                                                                                          
 
				                                                                                                            		

                                                                                                          
                                                                                                          

                                                                                                          

                                                                                                          
 
	 
                                                                                                          

                                                                                                          Standards
                                                                                                           
		 
		

                                                                                                           
					 
                                                                                                           Standard
					 
                                                                                                          
 
				                                                                                                            		
 
					 
                                                                                                           Title
					 
                                                                                                          
 
				                                                                                                            		

                                                                                                          
                                                                                                          

                                                                                                           
					 
                                                                                                           draft-martini-l2circuit-trans-mpls-08.txt
					 
                                                                                                          
 
				                                                                                                            		
 
					 
                                                                                                           
						Transport of Layer 2 Frames Over MPLS 
					 
                                                                                                          
 
				                                                                                                            		

                                                                                                          

                                                                                                           
					 
                                                                                                           draft-martini-l2circuit-encap-mpls-04.txt
					 
                                                                                                          
 
				                                                                                                            		
 
					 
                                                                                                           
						Encapsulation Methods for Transport of Layer 2 Frames Over MPLS 
					 
                                                                                                          
 
				                                                                                                            		

                                                                                                          
                                                                                                          

                                                                                                          

                                                                                                          
 
	 
                                                                                                          

                                                                                                          MIBs
                                                                                                           
		 
		

                                                                                                           
					 
                                                                                                           MIB 
					 
                                                                                                          
 
				                                                                                                            		
 
					 
                                                                                                           MIBs Link
					 
                                                                                                          
 
				                                                                                                            		

                                                                                                          
                                                                                                          

                                                                                                           
					 
                                                                                                           ATM AAL5 over MPLS and ATM Cell Relay over MPLS:
					 
                                                                                                          
 
					 
                                                                                                          •  MPLS LDP MIB (MPLS-LDP-MIB.my) 
						

                                                                                                            • 

                                                                                                          •  ATM MIB (ATM-MIB.my)
						

                                                                                                            • 

                                                                                                          •  CISCO AAL5 MIB (CISCO-AAL5-MIB.my)
						

                                                                                                            • 

                                                                                                          •  Cisco Enterprise ATM Extension MIB (CISCO-ATM-EXT-MIB.my)
						

                                                                                                            • 

                                                                                                          •  Supplemental ATM Management Objects (CISCO-IETF-ATM2-PVCTRAP-MIB.my)
						

                                                                                                            • 

                                                                                                          •  Interfaces MIB (IF-MIB.my)
						

                                                                                                            • 

                                                                                                          
 
					 
                                                                                                           Ethernet over MPLS: 
					 
                                                                                                          
 
					 
                                                                                                          •  CISCO-ETHERLIKE-CAPABILITIES.my 
						

                                                                                                            • 

                                                                                                          •  Ethernet MIB (ETHERLIKE-MIB.my) 
						

                                                                                                            • 

                                                                                                          •  Interfaces MIB (IF-MIB.my)
						

                                                                                                            • 

                                                                                                          •  MPLS LDP MIB (MPLS-LDP-MIB.my) 
						

                                                                                                            • 

                                                                                                          
 
					 
                                                                                                           Frame Relay over MPLS:
					 
                                                                                                          
 
					 
                                                                                                          •  Cisco Frame Relay MIB (CISCO-FRAME-RELAY-MIB.my) 
						

                                                                                                            • 

                                                                                                          •  Interfaces MIB (IF-MIB.my)
						

                                                                                                            • 

                                                                                                          •  MPLS LDP MIB (MPLS-LDP-MIB.my) 
						

                                                                                                            • 

                                                                                                          
 
					 
                                                                                                           HDLC and PPP over MPLS:
					 
                                                                                                          
 
					 
                                                                                                          •  MPLS LDP MIB (MPLS-LDP-MIB.my) 
						

                                                                                                            • 

                                                                                                          •  Interfaces MIB (IF-MIB.my)
						

                                                                                                            • 

                                                                                                          
 
				                                                                                                            		
 
					 
                                                                                                           To locate and download MIBs for selected platforms, Cisco software releases, and feature sets, use Cisco MIB Locator found at the following URL:
					 
                                                                                                          
 
					 
                                                                                                           
						http:/​/​www.cisco.com/​go/​mibs 
					 
                                                                                                          
 
				                                                                                                            		

                                                                                                          
                                                                                                          

                                                                                                          

                                                                                                          
 
	 
                                                                                                          

                                                                                                          RFCs
                                                                                                           
		 
		

                                                                                                           
					 
                                                                                                           RFC 
					 
                                                                                                          
 
				                                                                                                            		
 
					 
                                                                                                           Title
					 
                                                                                                          
 
				                                                                                                            		

                                                                                                          
                                                                                                          

                                                                                                           
					 
                                                                                                           RFC 3032
					 
                                                                                                          
 
				                                                                                                            		
 
					 
                                                                                                           
						MPLS Label Stack Encoding 
					 
                                                                                                          
 
				                                                                                                            		

                                                                                                          

                                                                                                           
					 
                                                                                                           RFC 3036
					 
                                                                                                          
 
				                                                                                                            		
 
					 
                                                                                                           
						LDP Specification 
					 
                                                                                                          
 
				                                                                                                            		

                                                                                                          
                                                                                                          

                                                                                                          

                                                                                                          
 
	 
                                                                                                          

                                                                                                          Technical Assistance
                                                                                                           
		 
		

                                                                                                           
					 
                                                                                                           Description
					 
                                                                                                          
 
				                                                                                                            		
 
					 
                                                                                                           Link
					 
                                                                                                          
 
				                                                                                                            		

                                                                                                          
                                                                                                          

                                                                                                           
					 
                                                                                                           The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. 
					 
                                                                                                          
 
				                                                                                                            		
 
					 
                                                                                                           
						http:/​/​www.cisco.com/​cisco/​web/​support/​index.html 
					 
                                                                                                          
 
				                                                                                                            		

                                                                                                          
                                                                                                          

                                                                                                          

                                                                                                          
 
	 
                                                                                                          

                                                                                                          

                                                                                                          

                                                                                                          Feature Information for Any Transport over MPLS
                                                                                                          

                                                                                                           
		
                                                                                                          The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature. 
		
                                                                                                          
 
		
                                                                                                          Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to 
		  www.cisco.com/​go/​cfn. An account on Cisco.com is not required. 
		
                                                                                                          
 
	 
                                                                                                          

                                                                                                           
		

                                                                                                          Table 9 Feature Information for Any Transport over MPLS 
                                                                                                           
				  
                                                                                                           Feature Name 
				  
                                                                                                          
 
				                                                                                                          		
 
				  
                                                                                                           Releases 
				  
                                                                                                          
 
				                                                                                                          		
 
				  
                                                                                                           Feature Information 
				  
                                                                                                          
 
				                                                                                                          		

                                                                                                          
                                                                                                          

                                                                                                           
				  
                                                                                                           Any Transport over MPLS 
				  
                                                                                                          
 
				                                                                                                          		
 
				  
                                                                                                           12.0(10)ST 12.0(21)ST 12.0(22)S 12.0(23)S 12.0(25)S 12.0(26)S 12.0(27)S 12.0(29)S 12.0(30)S 12.0(31)S 12.0(32)S 12.1(8a)E 12.2(14)S 12.2(15)T 12.2(28)SB 12.2(33)SRB 12.2(33)SXH 12.2(33)SRC 12.2(33)SRD 12.2(1)SRE 12.4(11)T 15.0(1)S 15.1(3)S 
				  
                                                                                                          
 
				                                                                                                          		
 
				  
                                                                                                           In Cisco IOS Release 12.0(10)ST, Any Transport over MPLS: ATM AAL5 over MPLS was introduced on the Cisco 12000 series routers. 
				  
                                                                                                          
 
				  
                                                                                                           In Cisco IOS Release 12.1(8a)E, Ethernet over MPLS was introduced on the Cisco 7600 series Internet router. 
				  
                                                                                                          
 
				  
                                                                                                           In Cisco IOS Release 12.0(21)ST, Any Transport over MPLS: Ethernet over MPLS was introduced on the Cisco 12000 series routers. ATM AAL5 over MPLS was updated. 
				  
                                                                                                          
 
				  
                                                                                                           In Cisco IOS Release 12.0(22)S, Ethernet over MPLS was integrated into this release. Support for the Cisco 10720 Internet router was added. ATM AAL5 over MPLS was integrated into this release for the Cisco 12000 series routers. 
				  
                                                                                                          
 
				  
                                                                                                           In Cisco IOS Release 12.0(23)S, the following new features were introduced and support was added for them on the Cisco 7200 and 7500 series routers: 
				  
                                                                                                          
 
				  
                                                                                                          •  ATM Cell Relay over MPLS (single cell relay, VC mode) 
					 

                                                                                                            • 

                                                                                                          •  Frame Relay over MPLS 
					 

                                                                                                            • 

                                                                                                          •  HDLC over MPLS 
					 

                                                                                                            • 

                                                                                                          •  PPP over MPLS 
					 

                                                                                                            • 

                                                                                                          
 
				  
                                                                                                           Cisco IOS Release 12.0(23)S also added support on the Cisco 12000, 7200, and 7500 series routers for the following features: 
				  
                                                                                                          
 
				  
                                                                                                          •  ATM AAL5 over MPLS 
					 

                                                                                                            • 

                                                                                                          •  Ethernet over MPLS (VLAN mode) 
					 

                                                                                                            • 

                                                                                                          
 
				  
                                                                                                           The AToM features were integrated into Cisco IOS Release 12.2(14)S. 
				  
                                                                                                          
 
				  
                                                                                                           The AToM features were integrated into Cisco IOS Release 12.2(15)T. 
				  
                                                                                                          
 
				  
                                                                                                           In Cisco IOS Release 12.0(25)S, the following new features were introduced: 
				  
                                                                                                          
 
				  
                                                                                                          •  New commands for configuring AToM 
					 

                                                                                                            • 

                                                                                                          •  Ethernet over MPLS: port mode 
					 

                                                                                                            • 

                                                                                                          •  ATM Cell Relay over MPLS: packed cell relay 
					 

                                                                                                            • 

                                                                                                          •  ATM Cell Relay over MPLS: VP mode 
					 

                                                                                                            • 

                                                                                                          •  ATM Cell Relay over MPLS: port mode 
					 

                                                                                                            • 

                                                                                                          •  Distributed Cisco Express Forwarding mode for Frame Relay, PPP, and HDLC over MPLS 
					 

                                                                                                            • 

                                                                                                          •  Fast reroute with AToM 
					 

                                                                                                            • 

                                                                                                          •  Tunnel selection 
					 

                                                                                                            • 

                                                                                                          •  Traffic policing 
					 

                                                                                                            • 

                                                                                                          •  QoS support 
					 

                                                                                                            • 

                                                                                                          
 
				                                                                                                          		

                                                                                                          

                                                                                                           
				
                                                                                                          
                                                                                                          		

                                                                                                           
				
                                                                                                          
                                                                                                          		
 
				  
                                                                                                           In Cisco IOS Release 12.0(26)S, the following new features were introduced: 
				  
                                                                                                          
 
				  
                                                                                                          •  Support for connecting disparate attachment circuits. See L2VPN Interworking for more information. 
					 

                                                                                                            • 

                                                                                                          •  QoS functionality with AToM for the Cisco 7200 series routers. 
					 

                                                                                                            • 

                                                                                                          
 
				  
                                                                                                           Support for FECN and BECN marking with Frame Relay over MPLS. (See BECN and FECN Marking for Frame Relay over MPLS for more information.) 
				  
                                                                                                          
 
				  
                                                                                                           In Cisco IOS Release 12.0(27)S, the following new features were introduced: 
				  
                                                                                                          
 
				  
                                                                                                          •  ATM Cell Relay over MPLS: Packed Cell Relay for VC, PVP, and port mode for the Cisco 12000 series router. 
					 

                                                                                                            • 

                                                                                                          •  Support for ATM over MPLS on the Cisco 12000 series 4-port OC-12X/STM-4 ATM ISE line card. 
					 

                                                                                                            • 

                                                                                                          
 
				  
                                                                                                           This feature was integrated into Cisco IOS Release 12.2(25)S for the Cisco 7200 and 7500 series routers. 
				  
                                                                                                          
 
				  
                                                                                                           In Cisco IOS Release 12.0(29)S, the “Any Transport over MPLS Sequencing Support” feature was added for the Cisco 7200 and 7500 series routers. 
				  
                                                                                                          
 
				  
                                                                                                           In Cisco IOS Release 12.0(30)S, the following new features were introduced: 
				  
                                                                                                          
 
				  
                                                                                                           In Cisco IOS Release 12.0(31)S, the Cisco 12000 series router introduced the following enhancements: 
				  
                                                                                                          
 
				  
                                                                                                          •  AToM VC Independence--With this enhancement, fast reroute is accomplished in less than 50 milliseconds, regardless of the number of VCs configured. 
					 

                                                                                                            • 

                                                                                                          •  Support for ISE line cards on the 2.5G ISE SPA Interface Processor (SIP). 
					 

                                                                                                            • 

                                                                                                          
 
				  
                                                                                                           In Cisco IOS Release 12.0(32)S, the Cisco 12000 series router added engine 5 line card support for the following transport types: 
				  
                                                                                                          
 
				  
                                                                                                          •  Ethernet over MPLS 
					 

                                                                                                            • 

                                                                                                          •  Frame Relay over MPLS 
					 

                                                                                                            • 

                                                                                                          •  HDLC over MPLS 
					 

                                                                                                            • 

                                                                                                          •  PPP over MPLS 
					 

                                                                                                            • 

                                                                                                          
 
				                                                                                                          		

                                                                                                          

                                                                                                           
				
                                                                                                          
                                                                                                          		

                                                                                                           
				
                                                                                                          
                                                                                                          		
 
				  
                                                                                                           This feature was integrated into Cisco IOS Release 12.2(28)SB on the Cisco 10000 series routers. Platform-specific configuration information is contained in the “Configuring Any Transport over MPLS” section of the 
					  Cisco 10000 Series Router Broadband Aggregation, Leased-Line, and MPLS Configuration Guide. 
				  
                                                                                                          
 
				  
                                                                                                           Any Transport over MPLS was integrated into Cisco IOS Release 12.4(11)T with support for the following features: 
				  
                                                                                                          
 
				  
                                                                                                          •  Any Transport over MPLS: Ethernet over MPLS: Port Mode 
					 

                                                                                                            • 

                                                                                                          •  Any Transport over MPLS: Ethernet over MPLS: VLAN Mode 
					 

                                                                                                            • 

                                                                                                          •  Any Transport over MPLS: Ethernet over MPLS: VLAN ID Rewrite 
					 

                                                                                                            • 

                                                                                                          •  Any Transport over MPLS: Frame Relay over MPLS 
					 

                                                                                                            • 

                                                                                                          •  Any Transport over MPLS: AAL5 over MPLS 
					 

                                                                                                            • 

                                                                                                          •  Any Transport over MPLS: ATM OAM Emulation 
					 

                                                                                                            • 

                                                                                                          
 
				  
                                                                                                           This feature was integrated into Cisco IOS Release 12.2(33)SRB to support the following features on the Cisco 7600 router: 
				  
                                                                                                          
 
				  
                                                                                                          •  Any Transport over MPLS: Frame Relay over MPLS 
					 

                                                                                                            • 

                                                                                                          •  Any Transport over MPLS: ATM Cell Relay over MPLS: Packed Cell Relay 
					 

                                                                                                            • 

                                                                                                          •  Any Transport over MPLS: Ethernet over MPLS 
					 

                                                                                                            • 

                                                                                                          •  AToM Static Pseudowire Provisioning 
					 

                                                                                                            • 

                                                                                                          
 
				  
                                                                                                           Platform-specific configuration information is contained in the following documents: 
				  
                                                                                                          
 
				  
 
				                                                                                                          		

                                                                                                          

                                                                                                           
				
                                                                                                          
                                                                                                          		

                                                                                                           
				
                                                                                                          
                                                                                                          		
 
				  
                                                                                                           This feature was integrated into Cisco IOS Release 12.2(33)SXH and supports the following features: 
				  
                                                                                                          
 
				  
                                                                                                          •  Any Transport over MPLS: Ethernet over MPLS: Port Mode 
					 

                                                                                                            • 

                                                                                                          •  Any Transport over MPLS: AAL5 over MPLS 
					 

                                                                                                            • 

                                                                                                          •  Any Transport over MPLS: ATM OAM Emulation 
					 

                                                                                                            • 

                                                                                                          •  Any Transport over MPLS: Single Cell Relay--VC Mode 
					 

                                                                                                            • 

                                                                                                          •  Any Transport over MPLS: ATM Cell Relay over MPLS--VP Mode 
					 

                                                                                                            • 

                                                                                                          •  Any Transport over MPLS: Packed Cell Relay--VC/VP Mode 
					 

                                                                                                            • 

                                                                                                          •  Any Transport over MPLS: Ethernet over MPLS 
					 

                                                                                                            • 

                                                                                                          •  ATM Port Mode Packed Cell Relay over AToM 
					 

                                                                                                            • 

                                                                                                          •  AToM Tunnel Selection 
					 

                                                                                                            • 

                                                                                                          
 
				  
                                                                                                           The following features were integrated into Cisco IOS Release 12.2(33)SRC: 
				  
                                                                                                          
 
				  
                                                                                                          •  AToM Tunnel Selection for the Cisco 7200 and Cisco 7300 routers 
					 

                                                                                                            • 

                                                                                                          •  Per-Subinterface MTU for Ethernet over MPLS (EoMPLS) 
					 

                                                                                                            • 

                                                                                                          
 
				  
                                                                                                           In Cisco IOS Release 12.2(33)SRD, support for ATM Cell Relay over MPLS in port mode on Cisco 7600 series routers was added. 
				  
                                                                                                          
 
				  
                                                                                                           Per Subinterface MTU for Ethernet over MPLS (EoMPLS) was integrated into Cisco IOS Release 15.1(3)S. 
				  
                                                                                                          
 
				                                                                                                          		

                                                                                                          

                                                                                                           
				  
                                                                                                           MPLS L2VPN Clear Xconnect Command 
				  
                                                                                                          
 
				                                                                                                          		
 
				  
                                                                                                           12.2(1)SRE 
				  
                                                                                                          
 
				  
                                                                                                           15.0(1)S 
				  
                                                                                                          
 
				                                                                                                          		
 
				  
                                                                                                           These features are supported on Cisco 7600 routers in Cisco IOS Release 12.2(1)SRE and Cisco IOS Release 15.0(1)S. 
				  
                                                                                                          
 
				  
                                                                                                           These features enable you to: 
				  
                                                                                                          
 
				  
                                                                                                          •  Reset a VC associated with an interface, a peer address, or on all the configured xconnect circuit attachments 
					 

                                                                                                            • 

                                                                                                          •  Set the control word on dynamic pseudowires. 
					 

                                                                                                            • 

                                                                                                          •  Enable ATM cell packing for static pseudowires. 
					 

                                                                                                            • 

                                                                                                          
 
				  
                                                                                                           The following commands were introduced or modified by these features: 
					 cell-packing, 
					 clear 
						xconnect, 
					 control-word, 
					 encapsulation 
						(Any 
						Transport 
						over 
						MPLS), 
						oam-ac 
						emulation-enable. 
				  
                                                                                                          
 
				                                                                                                          		

                                                                                                          

                                                                                                           
				  
                                                                                                           MPLS MTU Command for GRE Tunnels 
				  
                                                                                                          
 
				                                                                                                          		
 
				  
                                                                                                           15.1(1)T 15.1(2)S 
				  
                                                                                                          
 
				                                                                                                          		
 
				  
                                                                                                           This feature allows you to reset the MPLS MTU size in GRE tunnels from default to the maximum. 
				  
                                                                                                          
 
				  
                                                                                                           The 
					 maximum keyword was replaced with the 
					 max keyword. 
				  
                                                                                                          
 
				  
                                                                                                           The following command was modified by this feature: 
					 mpls 
						mtu. 
				  
                                                                                                          
 
				                                                                                                          		

                                                                                                          

                                                                                                          
				  
                                                                                                          ATM Port mode Packed Cell Relay over MPLS
				  
                                                                                                          

				                                                                                                          		

				  
                                                                                                           15.2(1)S 
				  
                                                                                                          

				                                                                                                          		

				  
                                                                                                           This feature was integrated into Cisco IOS Release 12.2(1)S.
				  
                                                                                                          

				                                                                                                          		

                                                                                                          

                                                                                                          
				  
                                                                                                          Any Transport over MPLS (AToM): ATM Cell Relay over MPLS: Packed Cell Relay
				  
                                                                                                          

				                                                                                                          		

				  
                                                                                                           15.2(1)S 
				  
                                                                                                          

				                                                                                                          		

				  
                                                                                                           This feature was integrated into Cisco IOS Release 12.2(1)S.