Configuring Pseudowire


Note

Pseudowire configuration is not supported on the Cisco ASR 900 RSP3 module.

Configuring Pseudowire

This chapter provides information about configuring pseudowire (PW) features.

Pseudowire Overview

The following sections provide an overview of pseudowire.

Asynchronous Transfer Mode over MPLS

An ATM over MPLS (AToM) PW is used to carry Asynchronous Transfer Mode (ATM) cells over an MPLS network. It is an evolutionary technology that allows you to migrate packet networks from legacy networks, while providing transport for legacy applications. AToM is particularly useful for transporting 3G voice traffic over MPLS networks.

You can configure AToM in the following modes:

  • N-to-1 Cell—Maps one or more ATM virtual channel connections (VCCs) or virtual permanent connection (VPCs) to a single pseudowire.
  • 1-to-1 Cell—Maps a single ATM VCC or VPC to a single pseudowire.

The Cisco ASR 903 Series Router also supports cell packing and PVC mapping for AToM pseudowires.


Note
This release does not support AToM N-to-1 Cell Mode or 1-to-1 Cell Mode.

For more information about how to configure AToM, see the "Configuring an ATM over MPLS Pseudowire" section in the "Configuring Pseudowire" chapter of the Cisco ASR 903 Router Chassis Software Configuration Guide.

Configuring ATM IMA

Inverse multiplexing provides the capability to transmit and receive a single high-speed data stream over multiple slower-speed physical links. In Inverse Multiplexing over ATM (IMA), the originating stream of ATM cells is divided so that complete ATM cells are transmitted in round-robin order across the set of ATM links. Follow these steps to configure IMA:


Note

IMA is used as an element in configuring ATM over MPLS pseudowires.


Note

The maximum ATM over MPLS pseudowires supported per T1/E1 interface module is 500.

To configure the ATM interface on the router, you must install the ATM feature license using the license install atm command. To activate or enable the configuration on the IMA interface, use the license feature atm command. For more information about installing licenses, see the Software Activation Configuration Guide, Cisco IOS XE Release 3S.


Note

You can create a maximum of 16 IMA groups on each T1/E1 interface module.


Note

ILMI is not supported starting with Cisco IOS XE Releease 3.15 on the router.

Procedure

  Command or Action Purpose
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

card type {t1 | e1}slot [bay]

Example:

Router(config)# card type e1 0 0

Specifies the slot and port number of the E1 or T1 interface.

Step 4

controller {t1 | e1}slot/subslot/port

Example:

Router(config)# controller E1 0/0/4

Specifies the controller interface on which you want to enable IMA.

Step 5

clock source internal

Example:

Router(config-controller)# clock source internal

Sets the clock source to internal.

Step 6

ima group group-number [scrambling-payload]

Example:

Router(config-controller)# ima-group 0

Assigns the interface to an IMA group, and set the scrambling-payload parameter to randomize the ATM cell payload frames. This command assigns the interface to IMA group 0.

Note 

This command automatically creates an ATM0/IMAx interface.

Note 

To add another member link, repeat Step 3 to Step 6.

Step 7

exit

Example:

Router(config-controller)# exit

Exits the controller interface.

Step 8

interface ATM slot/subslot/ IMA group-number

Example:

Router(config-if)# interface atm0/1/ima0

Specify the slot location and port of IMA interface group.

  • slot —The location of the ATM IMA interface module.

  • group-number —The IMA group.

Note 

To explicitly configure the IMA group ID for the IMA interface, use the optional ima group-id command. You cannot configure the same IMA group ID on two different IMA interfaces; therefore, if you configure an IMA group ID with the system-selected default ID already configured on an IMA interface, the system toggles the IMA interface to make the user-configured IMA group ID the effective IMA group ID. The system toggles the original IMA interface to select a different IMA group ID.

Step 9

no ip address

Example:

Router(config-if)# no ip address

Disables the IP address configuration for the physical layer interface.

Step 10

atm bandwidth dynamic

Example:

Router(config-if)# atm bandwidth dynamic

Specifies the ATM bandwidth as dynamic.

Step 11

no atm ilmi-keepalive

Example:

Router(config-if)# no atm ilmi-keepalive

Disables the Interim Local Management Interface (ILMI) keepalive parameters.

Note 

ILMI is not supported starting with Cisco IOS XE Releease 3.15 on the router.

Step 12

exit

Example:

Router(config)# exit

Exits configuration mode.

Configuring an ATM over MPLS Pseudowire

ATM over MPLS pseudowires allow you to encapsulate and transport ATM traffic across an MPLS network. This service allows you to deliver ATM services over an existing MPLS network.

The sections below describe how to configure transportation of service using ATM over MPLS:

Configuring the Controller

Procedure

  Command or Action Purpose
Step 1

Router> enable

Enables privileged EXEC mode.

Step 2

Router# configure terminal

Enters global configuration mode.

Step 3

Router(config)# card type e1 0 0

Configures IMA on an E1 or T1 interface.

Step 4

Router(config)# controller E1 0/4

Specifies the controller interface on which you want to enable IMA.

Step 5

Router(config-controller)# clock source internal

Sets the clock source to internal.

Step 6

Router(config-controller)# ima-group 0

Step 7

Router(config)# exit

Exits configuration mode.

Configuring an IMA Interface

If you want to use ATM IMA backhaul, follow these steps to configure the IMA interface.


Note

You can create a maximum of 16 IMA groups on each T1/E1 interface module.

Procedure

  Command or Action Purpose
Step 1

Router> enable

Enables privileged EXEC mode.

  • Enter your password if prompted.

Step 2

Router# configure terminal

Enters global configuration mode.

Step 3

Router(config-controller)# interface atm0/1/ima0

Specifies the slot location and port of IMA interface group. The syntax is as follows:

  • slot —The slot location of the interface module.

  • group-number —The group number of the IMA group.

The example specifies the slot number as 0 and the group number as 0.

Note 

o explicitly configure the IMA group ID for the IMA interface, you may use the optional ima group-id command. You cannot configure the same IMA group ID on two different IMA interfaces; therefore, if you configure an IMA group ID with the system-selected default ID already configured on an IMA interface, the system toggles the IMA interface to make the user-configured IMA group ID the effective IMA group ID. At the same, the system toggles the original IMA interface to select a different IMA group ID.

Step 4

Router(config-if)# no ip address

Disables the IP address configuration for the physical layer interface.

Step 5

Router(config-if)# atm bandwidth dynamic

Specifies the ATM bandwidth as dynamic.

Step 6

Router(config-if)# no atm ilmi-keepalive

Disables the ILMI keepalive parameters.

Step 7

Router(config)# exit

Exits configuration mode.

For more information about configuring IMA groups, see the “Configuring ATM IMA” section on page 11-9.

Configuring the ATM over MPLS Pseudowire Interface

You can configure ATM over MPLS is several modes according to the needs of your network. Use the appropriate section according to the needs of your network. The sections below show configuration of ATM over MPLS pseudowire types:


Note

Release 15.1(1)MR does not support N-to-1 VCC Cell Transport for mapping multiple PVCs, 1-to-1 VCC Cell Mode, or PVC mapping.


Note

When creating IP routes for a pseudowire configuration, build a route from the xconnect address (LDP router-id or loopback address) to the next hop IP address, such as ip route 30.30.30.2 255.255.255.255 1.2.3.4.

Configuring 1-to-1 VCC Cell Transport Pseudowire

A 1-to-1 VCC cell transport pseudowire maps one ATM virtual channel connection (VCC) to a single pseudowire. Complete these steps to configure a 1-to-1 pseudowire.


Note

Multiple 1-to-1 VCC pseudowire mapping on an interface is supported.

Mapping a Single PVC to a Pseudowire

To map a single PVC to an ATM over MPLS pseudowire, use the xconnect command at the PVC level. This configuration type uses AAL0 and AAL5 encapsulations. Complete these steps to map a single PVC to an ATM over MPLS pseudowire.


Note

Release 15.1(1)MR does not support mapping multiple VCCs to a pseudowire.

Procedure

  Command or Action Purpose
Step 1

Router> enable

Enables privileged EXEC mode.

Step 2

Router# configure terminal

Enters global configuration mode.

Step 3

Router(config)# interface atm0/1/ima0

Configures the ATM IMA interface.

Step 4

Router(config-if-atm)# pvc 10/20 l2transport

Defines a PVC. Use the l2transport keyword to configure the PVC as a layer 2 virtual circuit.

Step 5

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

Defines the encapsulation type for the PVC. The default encapsulation type for the PVC is AAL5.

Step 6

Router(config-if-atm-l2trans-pvc)# xconnect 1.1.1.1 40 encapsulation mpls

Binds an attachment circuit to the ATM IMA interface to create a pseudowire. This example creates a pseudowire by binding PVC 40 to the remote peer 1.1.1.1.

Step 7

Router(config-if-atm-l2trans-pvp-xconn)# end

Exits configuration mode.

Configuring N-to-1 VCC Cell Transport Pseudowire

An N-to-1 VCC cell transport pseudowire maps one or more ATM virtual channel connections (VCCs) to a single pseudowire. Complete these steps to configure an N-to-1 pseudowire.

Procedure

  Command or Action Purpose
Step 1

Router> enable

Enables privileged EXEC mode.

  • Enter your password if prompted.

Step 2

Router# configure terminal

Enters global configuration mode.

Step 3

Router(config)# interface atm0/1/1.1 multipoint

Configures the ATM multipoint interface.

Step 4

Router(config-subif)# xconnect 1.1.1.1 40 encapsulation mpls

Creates a pseudowire on an ATM interface. This example creates a pseudowire to the remote peer 1.1.1.1.

Step 5

Router(config-subif-xconn)# pvc 10/20 l2transport

Defines the first PVC 0/40 and maps it under the pseudowire created in Step 4. Use the l2transport keyword to configure the PVC as a layer 2 virtual circuit.

Step 6

Router(config-if-atm-l2trans-pvc)# pvc 0/41 l2transport

Defines the second PVC 0/41 and maps it under the pseudowire created in Step 4. Use the l2transport keyword to configure the PVC as a layer 2 virtual circuit.

Step 7

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

Exits configuration mode.

Configuring 1-to-1 VPC Cell Transport

A 1-to-1 VPC cell transport pseudowire maps one or more virtual path connections (VPCs) to a single pseudowire. While the configuration is similar to 1-to-1 VPC cell mode, this transport method uses the 1-to-1 VPC pseudowire protocol and format defined in RFCs 4717 and 4446. Complete these steps to configure a 1-to-1 VPC pseudowire.


Note

Multiple 1-to-1 VCC pseudowire mapping on an interface is supported.

Procedure

  Command or Action Purpose
Step 1

Router> enable

Enables privileged EXEC mode.

  • Enter your password if prompted.

Step 2

Router# configure terminal

Enters global configuration mode.

Step 3

Router(config)# interface atm0/1/ima0

Configures the ATM IMA interface.

Step 4

Router(config-if-atm)# atm pvp 10 l2transport

Maps a PVP to a pseudowire.

Step 5

Router(config-if-atm-l2trans-pvp)# xconnect 30.30.30.2 305 encapsulation mpls

Binds an attachment circuit to the ATM IMA interface to create a pseudowire. This example creates a pseudowire by binding the ATM circuit 305 to the remote peer 30.30.30.2.

Step 6

Router(config-if-atm-l2trans-pvp-xconn)# end

Exits the configuration mode.

Configuring ATM AAL5 SDU VCC Transport

An ATM AAL5 SDU VCC transport pseudowire maps a single ATM PVC to another ATM PVC.

Procedure

  Command or Action Purpose
Step 1

Device> enable

Enables privileged EXEC mode.

  • Enter your password if prompted.

Step 2

Device# configure terminal

Enters global configuration mode.

Step 3

Device(config)# interface atm 0/1/ ima 0

Configures the ATM IMA interface.

Step 4

Device(config-if)# pvc 0/12 l2transport

Configures a PVC and specifies a VCI or VPI.

Step 5

Device(config-if-atm-l2trans-pvc)# encapsulation aal5

Sets the PVC encapsulation type to AAL5.

Note 

You must use the AAL5 encapsulation for this transport type.

Step 6

Device(config-if-atm-l2trans-pvc)# xconnect 25.25.25.25 125 encapsulation mpls

Binds an attachment circuit to the ATM IMA interface to create a pseudowire. This example creates a pseudowire by binding the ATM circuit 125 to the remote peer 25.25.25.25.

Step 7

Device(config)# exit

Exits configuration mode.

Configuring Cell Packing (Optional)

You can apply the following optional configurations to a pseudowire link.

Cell packing allows you to improve the efficiency of ATM-to-MPLS conversion by packing multiple ATM cells into a single MPLS packet.

Procedure

  Command or Action Purpose
Step 1

Device> enable

Enables privileged EXEC mode.

  • Enter your password if prompted.

Step 2

Device# configure terminal

Enters global configuration mode.

Step 3

Device(config)# int atm1/0/1.1

Configures the ATM interface.

Step 4

Device(config-if)# atm mcpt-timers 1000 2000 3000

Defines the three Maximum Cell Packing Timeout (MCPT) timers under an ATM interface. The three independent MCPT timers specify a wait time before forwarding a packet.

Step 5

Device(config)# pvc 0/11 l2transport

Step 6

Device(config-if-atm-l2trans-pvc)# encapsulation aal0

Step 7

Device(config-if-atm-l2trans-pvc)# cell-packing 20 mcpt-timer 3

Specifies the maximum number of cells in PW cell pack and the cell packing timer that the Cisco ASR 903 Series Router uses. This example specifies 20 cells per pack and the third MCPT timer.

Step 8

Device(config-if-atm-l2trans-pvc)# end

Exits the configuration mode.

Example: ATM IMA Configuration

The following example shows how to add a T1/E1 interface to an ATM IMA group as a part of an ATM over MPLS pseudowire configuration. For more information about how to configure pseudowires, see Chapter 11, “Pseudowire Configuration.”


Note

This section displays a partial configuration intended to demonstrate a specific feature. 


controller t1 0/0/0
 ima-group 0
 clock source line

interface atm 0/0/ima0.1 point-to-point
 pvc 1/33 l2transport
  encapsulation aal0
  xconnect 1.1.1.1 33 encapsulation mpls

Example: ATM over MPLS

VC Mode for Cell Packing Configuration

CE 1 Configuration 


interface Gig 1/1/0
no negotiation auto
load-interval 30

interface Gig 0/1/0
ip address 20.1.1.1 255.255.255.0
interface ATM4/2/4
no shut
exit
!
interface ATM 1/1/4.10 point
ip address 50.1.1.1 255.255.255.0
pvc 20/101
encapsulation aal5snap
!
ip route 30.1.1.2 255.255.255.255 50.1.1.2

CE 2 Configuration 


interface Gig 1/0/1
no negotiation auto
load-interval 30

interface Gig 0/1/1
ip address 30.1.1.1 255.255.255.0
interface ATM6/2/1
no shut

!
interface ATM 1/0/1.10 point
ip address 50.1.1.2 255.255.255.0
pvc 20/101
encapsulation aal5snap


!
ip route 20.1.1.2 255.255.255.255 50.1.1.1

PE 1 Configuration 


interface Loopback0
ip address 192.168.37.3 255.255.255.255

!
interface ATM 0/0/1
no shut

!
interface ATM 0/0/1
atm mcpt-timers 150 1000 4095

interface ATM 0/0/0.10 point
pvc 20/101 l2transport
encapsulation aal0
cell-packing 20 mcpt-timer 1
xconnect 192.168.37.2 100 encapsulation mpls

!
interface Gig 0/1/0
no shut
ip address 40.1.1.1 255.255.0.0
mpls ip

!
mpls ip
mpls label protocol ldp
mpls ldp router-id Loopback0 force
mpls ldp graceful-restart

router ospf 1
network 40.1.0.0 0.0.255.255 area 1
network 192.168.37.0 0.0.0.255 area 1
nsf

PE 2 Configuration 


interface Loopback0
ip address 192.168.37.2 255.255.255.255
!
interface ATM 0/1/1
no shut

!
interface ATM 0/1/1
atm mcpt-timers 150 1000 4095

interface ATM 0/1/1.10 point
pvc 20/101 l2transport
encapsulation aal0
cell-packing 20 mcpt-timer 1
xconnect 192.168.37.3 100 encapsulation mpls



!
interface Gig 1/1
no shut
ip address 40.1.1.2 255.255.0.0
mpls ip

!
mpls ip
mpls label protocol ldp
mpls ldp router-id Loopback0 force
mpls ldp graceful-restart

router ospf 1
network 40.1.0.0 0.0.255.255 area 1
network 192.168.37.0 0.0.0.255 area 1
nsf

VP Mode for Cell Packing Configuration

CE 1 Configuration 


interface Gig 0/1/0
no negotiation auto
load-interval 30

interface Gig 0/1/0
ip address 20.1.1.1 255.255.255.0
interface ATM4/2/4


!
interface ATM 0/1/4.10 point
ip address 50.1.1.1 255.255.255.0
pvc 20/101
encapsulation aal5snap
!
ip route 30.1.1.2 255.255.255.255 50.1.1.2

CE 2 Configuration 


!
interface Gig 1/1
no negotiation auto
load-interval 30

interface Gig 1/1
ip address 30.1.1.1 255.255.255.0
interface ATM6/2/1
no shut

!
interface ATM 1/0/1.10 point
ip address 50.1.1.2 255.255.255.0
pvc 20/101
encapsulation aal5snap


!
ip route 20.1.1.2 255.255.255.255 50.1.1.1

PE 1 Configuration 


interface Loopback0
ip address 192.168.37.3 255.255.255.255

!
interface ATM 0/0/0
no shut

!
interface ATM 0/0/0
atm mcpt-timers 150 1000 4095

interface ATM 0/0/0.50 multipoint
atm pvp 20 l2transport
cell-packing 10 mcpt-timer 1
xconnect 192.168.37.2 100 encapsulation mpls



!
interface Gig 0/1/0
no shut
ip address 40.1.1.1 255.255.0.0
mpls ip

!
mpls ip
mpls label protocol ldp
mpls ldp router-id Loopback0 force
mpls ldp graceful-restart

router ospf 1
network 40.1.0.0 0.0.255.255 area 1
network 192.168.37.0 0.0.0.255 area 1
nsf

PE 2 Configuration 


!
interface Loopback0
ip address 192.168.37.2 255.255.255.255

!
interface ATM 0/1/1
no shut

!
interface ATM 0/1/1
atm mcpt-timers 150 1000 4095

interface ATM 0/1/1.50 multipoint
atm pvp 20 l2transport
cell-packing 10 mcpt-timer 1
xconnect 192.168.37.3 100 encapsulation mpls



!
interface Gig 1/1
no shut
ip address 40.1.1.2 255.255.0.0
mpls ip

!
mpls ip
mpls label protocol ldp
mpls ldp router-id Loopback0 force
mpls ldp graceful-restart

router ospf 1
network 40.1.0.0 0.0.255.255 area 1
network 192.168.37.0 0.0.0.255 area 1
nsf

VC Mode for Cell Relay Configuration

CE 1 Configuration 


!
interface gigabitethernet 0/1/0
no negotiation auto
load-interval 30

interface gigabitethernet 0/1/0
ip address 20.1.1.1 255.255.255.0
!
interface ATM 1/0/4
!
interface ATM 1/0/4.10 point
ip address 50.1.1.1 255.255.255.0
pvc 20/101
encapsulation aal5snap
!
ip route 30.1.1.2 255.255.255.255 50.1.1.2
!

CE 2 Configuration 


interface gigabitethernet 1/0
no negotiation auto
load-interval 30

interface gigabitethernet 1/0
ip address 30.1.1.1 255.255.255.0
interface ATM6/2/1
!
interface ATM 1/0/1.10 point
ip address 50.1.1.2 255.255.255.0
pvc 20/101
encapsulation aal5snap
!
ip route 20.1.1.2 255.255.255.255 50.1.1.1

PE 1 Configuration 


!
interface Loopback0
ip address 192.168.37.3 255.255.255.255
!
interface ATM0/0/0
!

interface ATM 0/0/0.10 point
pvc 20/101 l2transport
encapsulation aal0
xconnect 192.168.37.2 100 encapsulation mpls
!
interface gigabitethernet 0/1/0
ip address 40.1.1.1 255.255.0.0
mpls ip

!
mpls ip
mpls label protocol ldp
mpls ldp router-id Loopback0 force
mpls ldp graceful-restart

router ospf 1
network 40.1.0.0 0.0.255.255 area 1
network 192.168.37.0 0.0.0.255 area 1
nsf

PE 2 Configuration 


!
interface Loopback0
ip address 192.168.37.2 255.255.255.255
!
interface ATM 0/1/1
!
interface ATM 0/1/1.10 point
pvc 20/101 l2transport
encapsulation aal0
xconnect 192.168.37.3 100 encapsulation mpls

!
interface gigabitethernet 1/0
ip address 40.1.1.2 255.255.0.0
mpls ip
!
mpls ip
mpls label protocol ldp
mpls ldp router-id Loopback0 force
mpls ldp graceful-restart

router ospf 1
network 40.1.0.0 0.0.255.255 area 1
network 192.168.37.0 0.0.0.255 area 1
nsf

VP Mode for Cell Relay Configuration

CE 1 Configuration 


!
interface gigabitethernet 1/0/0
no negotiation auto
load-interval 30

interface gigabitethernet 1/1/0
ip address 20.1.1.1 255.255.255.0
!
interface ATM 1/0/4
!
interface ATM 1/0/4.10 point
ip address 50.1.1.1 255.255.255.0
pvc 20/101
encapsulation aal5snap
!
ip route 30.1.1.2 255.255.255.255 50.1.1.2

CE 2 Configuration 


!
interface gigabitethernet 1/0
no negotiation auto
load-interval 30

interface gigabitethernet 1/0
ip address 30.1.1.1 255.255.255.0
interface ATM 1/0/1
!
interface ATM 1/0/1.10 point
ip address 50.1.1.2 255.255.255.0
pvc 20/101
encapsulation aal5snap
!
ip route 20.1.1.2 255.255.255.255 50.1.1.1

PE 1 Configuration 


interface Loopback0
ip address 192.168.37.3 255.255.255.255
!
!
interface ATM 0/0/0

interface ATM 0/0/0.50 multipoint
atm pvp 20 l2transport
xconnect 192.168.37.2 100 encapsulation mpls
!
interface gigabitethernet 0/1/0
ip address 40.1.1.1 255.255.0.0
mpls ip

!
mpls ip
mpls label protocol ldp
mpls ldp router-id Loopback0 force
mpls ldp graceful-restart

router ospf 1
network 40.1.0.0 0.0.255.255 area 1
network 192.168.37.0 0.0.0.255 area 1
nsf

PE 2 Configuration 


interface Loopback0
ip address 192.168.37.2 255.255.255.255
!
!
interface ATM 1/0/1

interface ATM 1/0/1.50 multipoint
atm pvp 20 l2transport
xconnect 192.168.37.3 100 encapsulation mpls
!
interface gigabitethernet 1/1
ip address 40.1.1.2 255.255.0.0
mpls ip
!
mpls ip
mpls label protocol ldp
mpls ldp router-id Loopback0 force
mpls ldp graceful-restart

router ospf 1
network 40.1.0.0 0.0.255.255 area 1
network 192.168.37.0 0.0.0.255 area 1
nsf

Configuring ATM AAL5 over MPLS Pseudowire on a Sonet Controller

This section describes how to configure the ATM adaptation layer 5 (AAL5) over Multiprotocol Label Switching (MPLS) pseudowire on a Sonet controller.

To configure ATM AAL5 over MPLS on a SONET controller, use the following commands beginning privileged EXEC mode:

Procedure

  Command or Action Purpose
Step 1

configure terminal

Example:

Device# configure terminal

Enters global configuration mode from the terminal.

Step 2

controller sonet slot/ subslot/ port

Example:

Device(config)# controller sonet  0/ 1/ 0

Enters controller configuration mode to configure the SONET controller.

Step 3

framing sdh

Specifies the framing type as Synchronous Digital Hierarchy (SDH).

Step 4

Router(config-controller)# aug mapping au-4

Configures the AUG to be derived from AU-4.

Step 5

au-4 au-4-number tug-3 tug-3-number

Example:

Device(config-controller)# au-4 1 tug-3 1

Specifies the Administrative Unit type 4 (AU-4) and Tributary Unit group type 3 (TUG-3) numbers.

Step 6

tug-2 tug-2-number e1 e1-line-number atm

Example:

Device(config-ctrlr-tug3)# tug-2 1 e1 1 atm

Creates an ATM group for the AU-4

Step 7

exit

Exits to global configuration mode.

Step 8

interface atm slot/ subslot/ port. sts-1/ vtg/ t1. subpoint. point-to-point

Example:

Device(config)# interface atm  0/ 0/ 0.1/ 1/ 1/ 1.2  point-to-point

Enters subinterface configuration mode pertaining to the specified subinterface and specifies a point-to-point subinterface.

Step 9

pvc vpi/ vci l2transport

Example:

Device(config-subif)# pvc  10/ 100  l2transport

Creates an ATM permanent virtual circuit (PVC) and enters Layer 2 transport ATM virtual circuit configuration submode.

Step 10

encapsulation aal5

Specifies ATM AAL5 encapsulation for the PVC.

Step 11

xconnect remote-pe-loopback ip vcid encapsulation mpls

Example:

Device(cfg-if-atm-l2trans-pvc)# xconnect  203.0.113.5 501  encapsulation mpls

Binds the attachment circuit to a pseudowire VC.

Configuring ATM AAL5 over MPLS Pseudowire on T1 Controller

This section describes how to configure the ATM adaptation layer 5 (AAL5) over Multiprotocol Label Switching (MPLS) pseudowire on a T1 controller.

To configure ATM AAL5 over MPLS on a T1 controller, use the following commands beginning privileged EXEC mode:

Procedure

  Command or Action Purpose
Step 1

Router# configure terminal

Enters global configuration mode from the terminal.

Step 2

Router(config)# controller t1 slot/ subslot/ port

Example:

Router(config)# controller t1  0/ 1/ 0

Enters the controller configuration mode.

Step 3

Router(config-controller)# atm

Configures the T1 interface for ATM.

Step 4

Router(config)# interface atm slot/ subslot/ port point-to-point

Example:

Router(config)# interface atm  0/ 1/ 0.10  point-to-point

Configures a subinterface and point-to-point as the interface type.

Step 5

Router(config-subif)# pvc vpi/ vci l2transport

Example:

Router(config-subif)# pvc  10/ 100  l2transport

Creates an ATM permanent virtual circuit (PVC) and enters Layer 2 transport ATM virtual circuit configuration submode.

Step 6

Router(cfg-if-atm-l2trans-pvc)# encapsulation aal5

Specifies ATM AAL5 encapsulation for the PVC.

Step 7

Router(cfg-if-atm-l2trans-pvc)# xconnect peer-router-id vcid encapsulation mpls

Example:

Router(cfg-if-atm-l2trans-pvc)# xconnect  203.0.113.5 501  encapsulation mpls

Binds the attachment circuit to a pseudowire VC.

Configuring Service Classes on a PVC

This section describes how to configure different classes of service on a PVC.

To configure the configure different classes of service on a PVC, use the following commands beginning privileged EXEC mode:

Procedure

  Command or Action Purpose
Step 1

Router# configure terminal

Enters global configuration mode from the terminal.

Step 2

Router(config)# controller t1 slot/ subslot/ port

Example:

Router(config)# controller t1  0/ 1/ 0

Enters the controller configuration mode.

Step 3

Router(config-controller)# atm

Configures the T1 interface for ATM.

Step 4

Router(config)# interface atm slot/ subslot/ port point-to-point

Example:

Router(config)# interface atm  0/ 1/ 0.10  point-to-point

Configures a subinterface and point-to-point as the interface type.

Step 5

Router(config-subif)# pvc vpi/ vci l2transport

Example:

Router(config-subif)# pvc  10/ 100  l2transport

Creates an ATM permanent virtual circuit (PVC) and enters Layer 2 transport ATM virtual circuit configuration submode.

Step 6

Router(cfg-if-atm-l2trans-pvc)# {cbr | ubr | ubr+ | vbr-nrt | vbr-rt }

  • Constant Bit Rate (CBR)—The CBR service class is designed for ATM virtual circuits (VCs) that need a static amount of bandwidth that is continuously available for the duration of the active connection.
  • Unspecified Bit Rate (UBR)—This is a service class where the network management makes no Quality of Service (QoS) commitment. It models the best-effort service that the Internet normally provides and is suitable for applications tolerant to delay and does not require real-time responses.
  • Unspecified Bit Rate Plus—UBR+ supports a zero committed information rate (CIR) with infinite burst capabilities up to an entire T1. It allows any available network bandwidth to be continuously usable by any data application.
  • Variable Bit Rate Non-Real Time VBR-nrt service class is used in order to transmit non-real-time applications that are bursty in nature.
  • Variable Bit Rate Real Time—VBR-rt service class is used in order to transmit real-time data that is sensitive to time delays.

Example:

Router(cfg-if-atm-l2trans-pvc)# cbr

Configures a service class on a PVC. These are the available options:

Example QoS Exp Marking on ATM Layer 2 Interfaces

This section provides examples for configuring QoS Exp Marking on ATM Layer 2 Interfaces.

Example Configuring QoS Exp Marking on PVC Pseudowire

The following example shows how to configure QoS Exp Marking on PVC Pseudowire. 

Policy-map mark_exp_5
class class-default
set mpls exp imposition 5
interface atm 0/1/1 point-to-point
pvc 10/100 l2transport
xconnect 1.1.1.1 200 encapsulation mpls
service-policy input mark_exp_5
pvc 20/111 l2transport
xconnect 1.1.1.1 200 encapsulation mpls
service-policy input mark_exp_5

Example Configuring QoS Exp Marking on PVP Pseudowire

The following example shows how to configure QoS Exp Marking on PVP Pseudowire. 

Policy-map mark_exp_5
class class-default
set mpls exp imposition 5
interface ATM0/1/2
atm pvp 10 l2 transport
xonnect 1.1.1.1 400 encapsulation mpls
service-policy input mark_exp_5

Example Configuring QoS Exp Marking on N:1 Pseudowire

The following example shows how to configure QoS Exp Marking on N:1 Pseudowire. 

Policy-map mark_exp_5
class class-default
set mpls exp imposition 5
interface atm 0/3/2.1 multipoint 
xconnect 11.1.1.1 400 encapsulation mpls
service-policy input mark_exp_5
pvc 10/122
pvc 120/122

PE Configuration Example Configuring Cell Packing

The following example shows how to configure Cell Packing. 

interface ATM0/4/11
no ip address
atm mcpt-timers 51150 51150 51150 
no atm enable-ilmi-trap
end
interface ATM0/4/11.1 multipoint
no atm enable-ilmi-trap
cell-packing 28 mcpt-timer 1
xconnect 11.11.11.11 30 encapsulation mpls
pvc 20/10 l2transport
!
pvc 21/11 l2transport
!
pvc 22/12 l2transport
!
pvc 23/13 l2transport
!
pvc 24/14 l2transport
!
pvc 25/15 l2transport
!
pvc 26/16 l2transport
!
pvc 27/17 l2transport