IEEE 802.1ah Support on Provider Backbone Bridges

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Updated:February 15, 2011

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IEEE 802.1ah on Provider Backbone Bridges

Table Of Contents

IEEE 802.1ah on Provider Backbone Bridges

Finding Feature Information

Contents

Prerequisites for IEEE 802.1ah on Provider Backbone Bridges

Restrictions for IEEE 802.1ah on Provider Backbone Bridges

Information About IEEE 802.1ah on Provider Backbone Bridges

MAC-in-MAC

Backbone Edge Bridges

IB-Bridges

IEEE 802.1ah for L2 Bridging Networks

Unknown Unicast and Customer Multicast Traffic

IEEE 802.1ah for Ethernet Over MPLS

IEEE 802.1ah for Virtual Private LAN Services

How to Configure MAC-in-MAC on Provider Backbone Bridges

Configuring MAC-in-MAC in an L2 Bridging Network

Configuring MAC-in-MAC in an Ethernet over MPLS Network

Configuring MAC-in-MAC in a VPLS Network

Configuration Examples for MAC-in-MAC on Provider Backbone Bridges

Example: MAC-in-MAC Configuration for L2 Bridging Networks

Example: MAC-in-MAC Configuration for Ethernet over MPLS Networks

Example: MAC-in-MAC Configuration for VPLS Networks

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Feature Information for IEEE 802.1ah on Provider Backbone Bridges

IEEE 802.1ah on Provider Backbone Bridges

First Published: November 25, 2009

Last Updated: February 8, 2011

The IEEE 802.1ah on Provider Backbone Bridges feature enables MAC-in-MAC tunneling on Ethernet virtual circuits (EVCs).

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest feature information and caveats, see 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 for IEEE 802.1ah on Provider Backbone Bridges" section.

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

Contents

•Prerequisites for IEEE 802.1ah on Provider Backbone Bridges

•Restrictions for IEEE 802.1ah on Provider Backbone Bridges

•Information About IEEE 802.1ah on Provider Backbone Bridges

•How to Configure MAC-in-MAC on Provider Backbone Bridges

•Configuration Examples for MAC-in-MAC on Provider Backbone Bridges

•Additional References

•Feature Information for IEEE 802.1ah on Provider Backbone Bridges

Prerequisites for IEEE 802.1ah on Provider Backbone Bridges

•The router configuration must include an ES40 line card, because the Institute of Electrical and Electronic Engineers (IEEE) 802.1ah standard is supported on ES40 line cards only.

•IEEE 802.1ah is supported on EVC architecture only.

Restrictions for IEEE 802.1ah on Provider Backbone Bridges

•The following features are not supported:

–Connectivity Fault Management (CFM) over 802.1ah

–Internet Group Multicast Protocol (IGMP) snooping or any mulitcast protocol on the customer-bridge (c-bridge) domain

–Standalone customer-facing backbone edge bridge (I-BEB)

–Standalone backbone core bridge-facing backbone edge bridge (B-BEB)

•The following limits apply to this feature:

–Maximum number of MAC tunnels is 4094.

–Maximum number of service instances under MAC tunnels is 16,384.

–Maximum number of Ethernet Flow Points (EFP) is 32,768.

–Maximum number of EFPs on a single interface is 8000.

–802.1ah on the port channel is supported for one member link per port channel only.

Information About IEEE 802.1ah on Provider Backbone Bridges

•MAC-in-MAC

•Backbone Edge Bridges

•IB-Bridges

•IEEE 802.1ah for L2 Bridging Networks

•IEEE 802.1ah for Ethernet Over MPLS

•IEEE 802.1ah for Virtual Private LAN Services

MAC-in-MAC

The IEEE 802.1ah on Provider Backbone Bridges feature encapsulates the end users traffic inside the service providers MAC header, enabling the backbone edge bridge (BEB) to support large numbers of service instances. This functionality is also known as MAC-in-MAC or MAC Tunneling Protocol (MTP). It also allows service providers to hide the identity of their equipment vendors by using user-specified MAC address as the tunnel source address. It also separates the user MAC address space from the provider MAC address space which means that only the edge bridges are aware of the customer MAC addresses, and that only the core bridges are aware of the provider addresses.

Figure 1 shows a typical 802.1ah PBB network and Table 1 describes the PBB network components.

Table 1 IEEE 802.1ah PBB Components

Component

Description

BCB

Backbone core bridge

BEB

Backbone edge bridge

CE

Customer equipment

PB

Provider bridge

PEB

Provider edge bridge

Figure 1 IEEE 802.1ah Provider Backbone

Bridge

Backbone Edge Bridges

BEBs can contain either an I-Component or a B-Component. The I-Component maps Service VLAN identifiers (S-VIDs) to service instance identifiers (I-SIDs) and adds a PBB header without a B-Tag. The B-Component maps I-SIDs to backbone VIDs (B-VIDs) and adds a PBB header with a B-Tag. The IEEE 802.1ah standard specifies the following three types of BEBs:

•The B-Bridge (B-BEB) contains the B-Component of the MAC-in-MAC bridge. It validates the I-SIDs and maps the frames onto the backbone VLAN (B-VLAN). It also switches traffic based on the B-VLANS within the core bridge.

•The I-Bridge (I-BEB) contains the I-Component of the MAC-in-MAC bridge. It performs B-MAC encapsulation and inserts the I-SIDs based on the S-tags, C-tags, or S-tag/C-tag pairs.

•The IB-Bridge (IB-BEB) contains one or more I-Components and a single B-Component interconnected via a LAN segment.

Note The Cisco 7600 series routers are designed to work as IB-Bridges.

IB-Bridges

The IB-Bridge contains both the I-Component and the B-Component. The bridge selects the B-MAC and inserts the I-SID based on the provider VLAN tag (S-tag), the customer VLAN tag (C-tag), or both the S-tag and the C-tag. It validates the I-SIDs and it transmits and receives frames on the B-VLAN.

The IB-Bridge has two types of interfaces:

•Port-based interface: On port-based interfaces all S-tagged frames received from a customer are mapped to an I-SID and the S-tags are preserved.

•S-tagged interface: S-tagged interfaces support one-to-one mapping of an S-VLAN to an I-SID to provide S-VLAN translation capabilities. They also support many-to-one mapping of S-VLANs to an I-SID to provide S-VLAN bundling capability.

The IEEE 802.1ah on Provider Backbone Bridges feature supports all services mandated by the IEEE 802.1ah standard and extends the services to provide additional functionality as follows:

•S-Tagged Service:

–In multiplexed environments each S-tag maps to an I-SID and may be retained or removed.

–In bundled environments multiple S-tags map to the same I-SID and the S-tags must be retained.

•C-Tagged Service:

–In multiplexed environments each C-tag maps to an I-SID and may be retained or removed.

–In bundled environments multiple C-tags map to the same I-SID and the C-tags must be retained.

•S/C-Tagged Service:

–In multiplexed environments each S-tag/C-tag pair maps to an I-SID. The S-tag or the S-tag/C-tag pair may be retained or removed.

–In bundled environments multiple S-tag/C-tags pairs map to the same I-SID and the S-tag/C-tag pair must be retained.

•Port-based Service

–Any frame whether untagged or double tagged is mapped to the same I-SID and all tags are retained.

IEEE 802.1ah for L2 Bridging Networks

When IEEE 802.1ah is configured on PBBs in an L2 bridging network the packets on the ingress EFP are tunneled to the appropriate MAC tunnel using the bridging identifier in the I-Component (specified using the bridge-domain c-mac command). If multiple EFPs use the same I-SID then the C-MAC bridge domain also performs the switching between the EFPs.

Figure 2 shows a typical L2 bridging network configuration.

Figure 2 IEEE 802.1ah L2 Bridging Network

Table 2 describes the components of the L2 bridging network.

Table 2 L2 Bridging Network Components

Component Name

Description

802.1ad

IEEE 802.1ad (provider bridges) network

802.1ah

IEEE 802.1ah (provider backbone bridge) network

BEB

Backbone edge bridge

CE

Customer equipment

NNI

Network-to-network interface (egress EFP)

PE-Agg

Provider edge aggregation device

UNI

User-Network Interface (ingress EFP)

Unknown Unicast and Customer Multicast Traffic

Figure 3 shows an L2 network where all the BEBs are connected to each other through a single Backbone VLAN (B-VLAN). In this scenario any unknown unicast traffic from BEB1 is forwarded to BEB2 through to BEB5 because they all share the same B-VLAN.

Figure 3 BEB B-VLAN Network

In order to reduce network traffic you can configure a BEB to send traffic to specific BEBs on the B-VLAN. For example, if BEB1 needs to send traffic to BEB3 and BEB4 only, you can use the mac tunnel address destination map command to map the customer destination address (C-DA) to a multicast backbone destination address (B-DA). BEB3 and BEB4 are then registered to receive traffic for this B-DA.

All packets within the 802.1ah network must be sent to a specified MAC address. The address is a static entry in the MAC address tables in the backbone core bridges. If a default MAC tunnel address is not specified in the table, then all unknown unicast packets and customer multicast traffic are sent with the default B-DA, which is a combination of IEEE-assigned Organizational Unique Identifier (OUI) and the I-SID values.

IEEE 802.1ah for Ethernet Over MPLS

When IEEE 802.1ah is configured on Ethernet over Multiprotocol Label Switching (EoMPLS) networks, the Ethernet links are transported as pseudowires using MPLS label switched paths (LSPs) inside an MPLS tunnel. To configure MAC-in-MAC on EoMPLS networks you must specify ingress EFP configuration settings at the UNI, specify MAC-in-MAC settings, and specify switch virtual interface (SVI) configuration settings at the egress NNI. The SVI represents a VLAN of switch ports connected to the bridge via a single interface.

Figure 4 shows a typical EoMPLS network configuration.

Figure 4 EEE 802.1ah EoMPLS Network

Note In EoMPLS networks Cisco 7600 series routers use the bridge domain identifier (set using the bridge-domain command) as the B-tag identifier. Therefore it is not necessary to specify B-VLAN configuration for the MAC-in-MAC tunnel.

IEEE 802.1ah for Virtual Private LAN Services

When IEEE 802.1ah is configured on virtual private LAN service (VPLS) networks the 802.1ah packets are encapsulated in the VPLS pseudowire.

To configure MAC-in-MAC on VPLS networks you must specify the ingress EFP configuration settings at the UNI, specify the MAC-in-MAC settings, specify the virtual forwarding interface (VFI) settings, and specify the SVI configuration settings at the egress NNI. The SVI represents a VLAN of switch ports connected to the bridge via a single interface.

Figure 5 shows two 802.1ah networks connected by VPLS.

Figure 5 IEEE 802.1ah VPLS Network

How to Configure MAC-in-MAC on Provider Backbone Bridges

•Configuring MAC-in-MAC in an L2 Bridging Network (optional)

•Configuring MAC-in-MAC in an Ethernet over MPLS Network (optional)

•Configuring MAC-in-MAC in a VPLS Network (optional)

Configuring MAC-in-MAC in an L2 Bridging Network

Perform this task to configure MAC-in-MAC in an L2 bridging network where the NNI has a switchport-based configuration.

SUMMARY STEPS

1. enable

2. configure terminal

3. interface gigabitethernet slot/port

4. service instance id ethernet

5. encapsulation dot1q vlan-id

6. bridge-domain bridge-id c-mac

7. exit

8. exit

9. ethernet mac-tunnel virtual tunnel-id

10. description description

11. bridge-domain bridge-id

12. mac tunnel address destination default mac-addr

13. service instance id ethernet

14. encapsulation dot1ah isid isid

15. mac tunnel address destination map c-mac-addr b-mac-addr

16. bridge-domain bridge-id c-mac

17. exit

18. exit

19. interface gigabitethernet slot/port

20. switchport

21. switchport mode trunk

22. switchport trunk allowed vlan vlan-id

23. end

24. show bridge-domain

25. show ethernet mac-tunnel engine slot

26. show ethernet service instance

27. show ethernet service mac-tunnel

DETAILED STEPS
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

interface gigabitethernet slot/port

Example:

Router(config)# interface gigabitethernet 6/1

Specifies the Gigabit Ethernet interface to configure as the customer instance port and enters interface configuration mode.

Step 4

service instance id ethernet

Example:

Router(config-if)# service instance 101 ethernet

Creates an L2 service instance on an interface and enters service instance configuration mode.

Step 5

encapsulation dot1q vlan-id

Example:

Router(config-if-srv)# encapsulation dot1q 13

Defines the matching criteria to be used in order to map ingress dot1q frames on an interface to the appropriate service instance.

Step 6

bridge-domain bridge-id c-mac

Example:

Router(config-if-srv)# bridge-domain 12 c-mac

Specifies the bridging identifier in the I-Component.

Step 7

exit

Example:

Router(config-if-srv)# exit

Exits service instance configuration mode.

Step 8

exit

Example:

Router(config-if)# exit

Exits service interface configuration mode.

Step 9

ethernet mac-tunnel virtual tunnel-id

Example:

Router(config)# ethernet mac-tunnel virtual 1

Configures a virtual MAC-in-MAC tunnel and enters MAC-in-MAC tunnel configuration mode.

Step 10

description description

Example:

Router(config-tunnel-minm)# description MAC-Tunnel-1

(Optional) Describes the name and purpose of the MAC tunnel.

Step 11

bridge-domain bridge-id

Example:

Router(config-tunnel-minm)# bridge-domain 100

Binds the MAC tunnel to the bridge domain instance.

Step 12

mac tunnel address destination default mac-addr

Example:

Router(config-tunnel-minm)# mac tunnel address destination default 4444.1111.1111

Specifies a B-DA for a group of service instance IDs (I-SIDs).

Step 13

service instance id ethernet

Example:

Router(config-tunnel-minm)# service instance 10 ethernet

Defines an EFP that corresponds to a specific I-SID encapsulation and enters tunnel service configuration mode.

Step 14

encapsulation dot1ah isid isid

Example:

Router(config-tunnel-srv)# encapsulation dot1ah isid 10000

Configures dot1ah encapsulation for the specified I-SID.

Step 15

mac tunnel address destination map c-mac-addr b-mac-addr

Example:

Router(config-tunnel-srv)# mac tunnel address destination map 3333.1111.1111 5555.2222.2222

Maps the service provider backbone bridge MAC address to a customer MAC address.

Step 16

bridge-domain bridge-id c-mac

Example:

Router(config-tunnel-srv)# bridge-domain 30 c-mac

Configures the bridge domain as a customer domain.

Step 17

exit

Example:

Router(config-tunnel-srv)# exit

Exits tunnel service configuration mode.

Step 18

exit

Example:

Router(config-tunnel-minm)# exit

Exits MAC-in-MAC tunnel configuration mode.

Step 19

interface gigabitethernet slot/port

Example:

Router(config)# interface gigabitethernet 6/2

Specifies the Gigabit Ethernet interface to configure as the bridge instance port and enters interface configuration mode.

Step 20

switchport

Example:

Router(config-if)# switchport

Modifies the switching characteristics of the L2 switched interface.

Step 21

switchport mode trunk

Example:

Router(config-if)# switchport mode trunk

Specifies a trunking VLAN L2 interface.

Step 22

switchport trunk allowed vlan vlan-id

Example:

Router(config-if)# switchport trunk allowed vlan 100

Sets the list of allowed VLANs that transmit traffic from this interface in tagged format when in trunking mode.

Step 23

end

Example:

Router(config-if)# end

Exits interface configuration mode and enables user EXEC mode.

Step 24

show bridge-domain

Example:

Router> show bridge-domain

(Optional) Displays bridge-domain information.

Step 25

show ethernet mac-tunnel engine slot slot-number

Example:

Router> show ethernet mac-tunnel engine slot 2

(Optional) Displays Ethernet MAC-in-MAC information.
Step 26
show ethernet service instance
Example:

Router> show ethernet service instance
(Optional) Displays Ethernet service instance information.
Step 27
show ethernet service mac-tunnel
Example:

Router> show ethernet service mac-tunnel
(Optional) Displays Ethernet service MAC-in-MAC information.
Configuring MAC-in-MAC in an Ethernet over MPLS Network

Perform this task to configure MAC-in-MAC in an EoMPLS network.

SUMMARY STEPS

1. enable

2. configure terminal

3. interface gigabitethernet slot/port

4. service instance id ethernet

5. encapsulation dot1q vlan-id

6. bridge-domain bridge-id c-mac

7. exit

8. exit

9. ethernet mac-tunnel virtual tunnel-id

10. bridge-domain bridge-id

11. service instance id ethernet

12. encapsulation dot1ah isid isid

13. bridge-domain bridge-id c-mac

14. exit

15. exit

16. interface vlan vlanid

17. xconnect ipaddress vc-id encapsulation mpls

18. exit

DETAILED STEPS

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

interface gigabitethernet slot/port

Example:

Router(config)# interface gigabitethernet 6/1

Specifies the Gigabit Ethernet interface to configure as the customer instance port and enters interface configuration mode.

Step 4

service instance id ethernet

Example:

Router(config-if)# service instance 101 ethernet

Creates an L2 service instance on an interface and enters service instance configuration mode.

Step 5

encapsulation dot1q vlan-id

Example:

Router(config-if-srv)# encapsulation dot1q 13

Defines the matching criteria to be used in order to map ingress dot1q frames on an interface to the appropriate service instance.

Step 6

bridge-domain bridge-id c-mac

Example:

Router(config-if-srv)# bridge-domain 12 c-mac

Specifies the bridging identifier in the I-Component.

Step 7

exit

Example:

Router(config-if-srv)# exit

Exits service instance configuration mode.

Step 8

exit

Example:

Router(config-if)# exit

Exits interface configuration mode.

Step 9

ethernet mac-tunnel virtual tunnel-id

Example:

Router(config)# ethernet mac-tunnel virtual 1

Configures a virtual MAC-in-MAC tunnel and enters MAC-in-MAC tunnel configuration mode.

Step 10

bridge-domain bridge-id

Example:

Router(config-tunnel-minm)# bridge-domain 100

Binds the MAC tunnel to the bridge domain instance.

Step 11

service instance id ethernet

Example:

Router(config-tunnel-minm)# service instance 10 ethernet

Defines an EFP that corresponds to a specific I-SID encapsulation and enters tunnel service configuration mode.

Step 12

encapsulation dot1ah isid isid

Example:

Router(config-tunnel-srv)# encapsulation dot1ah isid 10000

Configures dot1ah encapsulation for the specified I-SID.

Step 13

bridge-domain bridge-id c-mac

Example:

Router(config-tunnel-srv)# bridge-domain 30 c-mac

Configures the bridge domain as a customer domain.

Step 14

exit

Example:

Router(config-tunnel-srv)# exit

Exits tunnel service configuration mode.

Step 15

exit

Example:

Router(config-tunnel-minm)# exit

Exits MAC-in-MAC tunnel configuration mode.

Step 16

interface vlan vlanid

Example:

Router(config)# interface vlan 1000

Creates a dynamic SVI, and enters interface configuration mode.

Step 17

xconnect ipaddress vc-id encapsulation mpls

Example:

Router(config-if)# xconnect 10.243.245.11 100 encapsulation mpls

Binds the attachment circuit to the pseudowire, and configures an Any Transport over MPLS (AToM) static pseudowire.

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

Step 18

exit

Example:

Router(config-if)# exit

Returns to global configuration mode.

Configuring MAC-in-MAC in a VPLS Network

Perform this task to configure MAC-in-MAC in a VPLS network. The following configuration enables the router to work as an IB-Bridge.

Note On Cisco 7600 series routers the bridge-domain identifier must be the same as the SVI identifier.

SUMMARY STEPS

1. enable

2. configure terminal

3. interface gigabitethernet slot/port

4. service instance id ethernet

5. encapsulation dot1q vlan-id

6. bridge-domain bridge-id c-mac

7. exit

8. exit

9. ethernet mac-tunnel virtual tunnel-id

10. bridge-domain bridge-id

11. service instance id ethernet

12. encapsulation dot1ah isid isid

13. bridge-domain bridge-id c-mac

14. exit

15. service instance id ethernet

16. encapsulation dot1ah isid isid

17. bridge-domain bridge-id c-mac

18. exit

19. exit

20. l2 vfi vfi-name manual

21. vpn id vpn-id

22. neighbor ipaddress vcid encapsulation mpls

23. neighbor ipaddress vcid encapsulation mpls

24. exit

25. interface vlan vlan-id

26. xconnect ipaddress vc-id encapsulation mpls

27. exit

DETAILED STEPS

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

interface gigabitethernet slot/port

Example:

Router(config)# interface gigabitethernet 6/1

Specifies the Gigabit Ethernet interface to configure as the customer instance port and enters interface configuration mode.

Step 4

service instance id ethernet

Example:

Router(config-if)# service instance 101 ethernet

Creates an L2 service instance on an interface and enters service instance configuration mode.

Step 5

encapsulation dot1q vlan-id

Example:

Router(config-if-srv)# encapsulation dot1q 13

Defines the matching criteria to be used in order to map ingress dot1q frames on an interface to the appropriate service instance.

Step 6

bridge-domain bridge-id c-mac

Example:

Router(config-if-srv)# bridge-domain 12

Specifies the bridging identifier in the I-Component.

Step 7

exit

Example:

Router(config-if-srv)# exit

Exits service instance configuration mode.

Step 8

exit

Example:

Router(config-if)# exit

Exits interface configuration mode.

Step 9

ethernet mac-tunnel virtual tunnel-id

Example:

Router(config)# ethernet mac-tunnel virtual 1

Configures a virtual MAC-in-MAC tunnel and enters MAC-in-MAC tunnel configuration mode.

Step 10

bridge-domain bridge-id

Example:

Router(config-tunnel-minm)# bridge-domain 100

Binds the MAC tunnel to the bridge domain instance.

Step 11

service instance id ethernet

Example:

Router(config-tunnel-minm)# service instance 31 ethernet

Defines an EFP that corresponds to a specific I-SID encapsulation and enters tunnel service configuration mode.

Step 12

encapsulation dot1ah isid isid

Example:

Router(config-tunnel-srv)# encapsulation dot1ah isid 10000

Configures dot1ah encapsulation for the specified I-SID.

Step 13

bridge-domain bridge-id c-mac

Example:

Router(config-tunnel-srv)# bridge-domain 10 c-mac

Configures the bridge domain as a customer domain.

Step 14

exit

Example:

Router(config-tunnel-srv)# exit

Exits tunnel service configuration mode.

Step 15

service instance id ethernet

Example:

Router(config-tunnel-minm)# service instance 41 ethernet

Defines an EFP that corresponds to a specific I-SID encapsulation and enters tunnel service configuration mode.

Step 16

encapsulation dot1ah isid isid

Example:

Router(config-tunnel-srv)# encapsulation dot1ah isid 20000

Configures dot1ah encapsulation for the specified I-SID.

Step 17

bridge-domain bridge-id c-mac

Example:

Router(config-tunnel-srv)# bridge-domain 20 c-mac

Configures the bridge domain as a customer domain.

Step 18

exit

Example:

Router(config-tunnel-srv)# exit

Exits tunnel service configuration mode.

Step 19

exit

Example:

Router(config-tunnel-minm)# exit

Exits MAC-in-MAC tunnel configuration mode.

Step 20

l2 vfi vfi-name manual

Example:

Router(config)# l2 vfi myvfi manual

Configures a virtual forwarding instance and enters L2 VFI point-to-point configuration mode.

Step 21

vpn id vpn-id

Example:

Router(config-vfi)# vpn id 20

Sets a VPN ID on a VPN routing and forwarding (VRF) instance.

Step 22

neighbor ipaddress vcid encapsulation mpls

Example:

Router(config-vfi)# neighbor 172.16.10.12 2000 encapsulation mpls

Specifies the first router that forms a point-to-point Layer 2 VFI connection.

Step 23

neighbor ipaddress vcid encapsulation mpls

Example:

Router(config-vfi)# neighbor 172.16.200.120 2000 encapsulation mpls

Specifies the second router that forms a point-to-point Layer 2 VFI connection.

Step 24

exit

Example:

Router(config-vfi)# exit

Exits L2 VFI point-to-point configuration mode.

Step 25

interface vlan vlanid

Example:

Router(config)# interface vlan 1000

Creates a dynamic SVI, and enters interface configuration mode.

Step 26

xconnect ipaddress vc-id encapsulation mpls

Example:

Router(config-if)# xconnect 10.243.245.11 100 encapsulation mpls

Binds the attachment circuit to the pseudowire, and configures an AToM static pseudowire.

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

Step 27

exit

Example:

Router(config-if)# exit

Returns to global configuration mode.

Configuration Examples for MAC-in-MAC on Provider Backbone Bridges

•Example: MAC-in-MAC Configuration for L2 Bridging Networks

•Example: MAC-in-MAC Configuration for Ethernet over MPLS Networks

•Example: MAC-in-MAC Configuration for VPLS Networks

Example: MAC-in-MAC Configuration for L2 Bridging Networks

In the following example, the UNI configuration is performed on the GigabitEthernet 1/0, GigabitEthernet 2/0, and GigabitEthernet 3/0 interfaces. The MAC-in-MAC tunnel configuration includes commands to configure the default MAC tunnel destination address and the destination map. The NNI configuration is performed on the GigabitEthernet 1/2 interface, and shows the options for a switchport or External Interface (EI)-based NNI.

Note For switchport NNI configurations the VLAN ID is the same as the bridge domain ID configured under the MAC tunnel. For EI NNI configurations a service instance is configured under the NNI interface and the binding of the MAC tunnel to the service instance is done using the bridge domain.

UNI (Ingress) Configuration
interface gigabitethernet  1/0 
 service instance 10 ethernet  
  encapsulation dot1q 10  
  bridge-domain 20 c-mac  
 service instance 20 ethernet  
  encapsulation dot1q  20  
  bridge-domain 30 c-mac  
 
interface gigabitethernet 2/0  
 service instance 10 ethernet  
  encapsulation dot1q 10 
  bridge-domain 20 c-mac  
 service instance 30 ethernet  
  encapsulation dot1q 20  
  bridge-domain 30 c-mac   
interface gigabitethernet 3/0  
 service instance 10 ethernet  
  encapsulation dot1q 10  
  bridge-domain 20 c-mac 
MAC-in-MAC Tunnel Configuration
ethernet mac-tunnel virtual 1 
 bridge-domain 100 
 mac tunnel address destination default 4444.1111.1111 
 service instance 10 ethernet  
  encapsulation  dot1ah isid 10000  
  bridge-domain 20 c-mac  
 service instance 20 ethernet  
  encapsulation  dot1ah isid 20000  
  bridge-domain 30 c-mac 
  mac tunnel address destination map 3333.1111.1111 5555.2222.2222
Switchport NNI (Egress) Configuration
interface gigabitethernet 1/2   
 switchport   
 switchport mode trunk 
 switchport trunk allowed vlan 100 
EI NNI (Egress) Configuration
interface gigabitethernet 1/2   
 service instance 20 ethernet 
  encapsulation dot1q 
  bridge-domain 100 
Example: MAC-in-MAC Configuration for Ethernet over MPLS Networks

The following example shows how to configure a BEB where two 802.1ah networks are connected using MPLS:

UNI (Ingress) Configuration
interface gigabitethernet 1/1
 service instance 15 ethernet
  encapsulation dot1q 20 
  bridge-domain 10 c-mac
MAC-in-MAC Tunnel Configuration
ethernet mac-tunnel virtual 1
 bridge-domain 1000
 service instance 500 ethernet
  encapsulation dot1ah isid 10000
  bridge-domain 10 c-mac
SVI Configuration
interface vlan 1000
 xconnect 10.243.245.11 100 encapsulation mpls
Example: MAC-in-MAC Configuration for VPLS Networks

The following example shows how to configure a BEB where two 802.1ah networks are connected using VPLS. The 802.1ah packets are encapsulated in the VPLS pseudowire.

UNI (Ingress) Configuration
interface gigabitethernet 1/1
 service instance 21 ethernet
  encapsulation dot1q 20 
  bridge-domain 10 c-mac
MAC-in-MAC Tunnel Configuration
ethernet mac-tunnel virtual 1
 bridge-domain 100
 service instance 31 ethernet
  encapsulation dot1ah isid 10000
  bridge-domain 10 c-mac
 service instance 41 ethernet
  encapsulation dot1ah isid 30000
  bridge-domain 20 c-mac
VFI Configuration
l2 vfi myvfi manual
vpn id 20
 neighbor 172.16.10.12 2000 encapsulation mpls
 neighbor 172.16.200.120 2000 encapsulation mpls
vpn id vpn-id 
SVI Configuration
interface vlan 100
 xconnect vfi vfi100
Additional References

Related Documents

Related Topic

Document Title

MAC-in-MAC commands: complete command syntax, command mode, command history, defaults, usage guidelines, and examples

Cisco IOS Carrier Ethernet Command Reference

Cisco IOS commands: master list of commands with complete command syntax, command mode, command history, defaults, usage guidelines, and examples

Cisco IOS Master Commands List, All Releases

Standards

Standard

Title

IEEE 802.1ah

IEEE 802.1ah - Provider Backbone Bridges

MIBs

MIB

MIBs Link

None

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

No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature.

—

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 IEEE 802.1ah on Provider Backbone Bridges

Table 3 lists the release history for this feature.

Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Note Table 3 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.

Table 3 Feature Information for IEEE 802.1ah on Provider Backbone Bridges feature.

Feature Name

Releases

Feature Information

802.1ah/EVC2.0 for 7600 (Infrastructure)

12.2(33)SRE

The IEEE 802.1ah on Provider Backbone Bridges feature enables MAC-in-MAC on EVCs.

In Cisco IOS Release 12.2(33)SRE, this feature was introduced on the Cisco 7600 series routers.

The following sections provide information about this feature:

•Information About IEEE 802.1ah on Provider Backbone Bridges

•How to Configure MAC-in-MAC on Provider Backbone Bridges

The following commands were introduced or modified: bridge-domain, clear bridge-domain mac table, description, encapsulation dot1ah isid, ethernet mac-tunnel virtual, mac tunnel address destination default, mac tunnel address destination map, service instance ethernet (mac-tunnel), show bridge-domain, show ethernet mac-tunnel engine slot, show ethernet service instance, show ethernet service mac-tunnel.

Cisco and the Cisco Logo are trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and other countries. A listing of Cisco's trademarks can be found at www.cisco.com/go/trademarks. Third party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1005R)

Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.

© 2009-2011 Cisco Systems, Inc. All rights reserved.

Table 1 IEEE 802.1ah PBB Components
Component	Description
BCB	Backbone core bridge
BEB	Backbone edge bridge
CE	Customer equipment
PB	Provider bridge
PEB	Provider edge bridge

Table 2 L2 Bridging Network Components
Component Name	Description
802.1ad	IEEE 802.1ad (provider bridges) network
802.1ah	IEEE 802.1ah (provider backbone bridge) network
BEB	Backbone edge bridge
CE	Customer equipment
NNI	Network-to-network interface (egress EFP)
PE-Agg	Provider edge aggregation device
UNI	User-Network Interface (ingress EFP)

	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	interface gigabitethernet slot/port Example: Router(config)# interface gigabitethernet 6/1	Specifies the Gigabit Ethernet interface to configure as the customer instance port and enters interface configuration mode.
Step 4	service instance id ethernet Example: Router(config-if)# service instance 101 ethernet	Creates an L2 service instance on an interface and enters service instance configuration mode.
Step 5	encapsulation dot1q vlan-id Example: Router(config-if-srv)# encapsulation dot1q 13	Defines the matching criteria to be used in order to map ingress dot1q frames on an interface to the appropriate service instance.
Step 6	bridge-domain bridge-id c-mac Example: Router(config-if-srv)# bridge-domain 12 c-mac	Specifies the bridging identifier in the I-Component.
Step 7	exit Example: Router(config-if-srv)# exit	Exits service instance configuration mode.
Step 8	exit Example: Router(config-if)# exit	Exits service interface configuration mode.
Step 9	ethernet mac-tunnel virtual tunnel-id Example: Router(config)# ethernet mac-tunnel virtual 1	Configures a virtual MAC-in-MAC tunnel and enters MAC-in-MAC tunnel configuration mode.
Step 10	description description Example: Router(config-tunnel-minm)# description MAC-Tunnel-1	(Optional) Describes the name and purpose of the MAC tunnel.
Step 11	bridge-domain bridge-id Example: Router(config-tunnel-minm)# bridge-domain 100	Binds the MAC tunnel to the bridge domain instance.
Step 12	mac tunnel address destination default mac-addr Example: Router(config-tunnel-minm)# mac tunnel address destination default 4444.1111.1111	Specifies a B-DA for a group of service instance IDs (I-SIDs).
Step 13	service instance id ethernet Example: Router(config-tunnel-minm)# service instance 10 ethernet	Defines an EFP that corresponds to a specific I-SID encapsulation and enters tunnel service configuration mode.
Step 14	encapsulation dot1ah isid isid Example: Router(config-tunnel-srv)# encapsulation dot1ah isid 10000	Configures dot1ah encapsulation for the specified I-SID.
Step 15	mac tunnel address destination map c-mac-addr b-mac-addr Example: Router(config-tunnel-srv)# mac tunnel address destination map 3333.1111.1111 5555.2222.2222	Maps the service provider backbone bridge MAC address to a customer MAC address.
Step 16	bridge-domain bridge-id c-mac Example: Router(config-tunnel-srv)# bridge-domain 30 c-mac	Configures the bridge domain as a customer domain.
Step 17	exit Example: Router(config-tunnel-srv)# exit	Exits tunnel service configuration mode.
Step 18	exit Example: Router(config-tunnel-minm)# exit	Exits MAC-in-MAC tunnel configuration mode.
Step 19	interface gigabitethernet slot/port Example: Router(config)# interface gigabitethernet 6/2	Specifies the Gigabit Ethernet interface to configure as the bridge instance port and enters interface configuration mode.
Step 20	switchport Example: Router(config-if)# switchport	Modifies the switching characteristics of the L2 switched interface.
Step 21	switchport mode trunk Example: Router(config-if)# switchport mode trunk	Specifies a trunking VLAN L2 interface.
Step 22	switchport trunk allowed vlan vlan-id Example: Router(config-if)# switchport trunk allowed vlan 100	Sets the list of allowed VLANs that transmit traffic from this interface in tagged format when in trunking mode.
Step 23	end Example: Router(config-if)# end	Exits interface configuration mode and enables user EXEC mode.
Step 24	show bridge-domain Example: Router> show bridge-domain	(Optional) Displays bridge-domain information.
Step 25	show ethernet mac-tunnel engine slot slot-number Example: Router> show ethernet mac-tunnel engine slot 2	(Optional) Displays Ethernet MAC-in-MAC information.
Step 26	show ethernet service instance Example: Router> show ethernet service instance	(Optional) Displays Ethernet service instance information.
Step 27	show ethernet service mac-tunnel Example: Router> show ethernet service mac-tunnel	(Optional) Displays Ethernet service MAC-in-MAC information.

	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	interface gigabitethernet slot/port Example: Router(config)# interface gigabitethernet 6/1	Specifies the Gigabit Ethernet interface to configure as the customer instance port and enters interface configuration mode.
Step 4	service instance id ethernet Example: Router(config-if)# service instance 101 ethernet	Creates an L2 service instance on an interface and enters service instance configuration mode.
Step 5	encapsulation dot1q vlan-id Example: Router(config-if-srv)# encapsulation dot1q 13	Defines the matching criteria to be used in order to map ingress dot1q frames on an interface to the appropriate service instance.
Step 6	bridge-domain bridge-id c-mac Example: Router(config-if-srv)# bridge-domain 12 c-mac	Specifies the bridging identifier in the I-Component.
Step 7	exit Example: Router(config-if-srv)# exit	Exits service instance configuration mode.
Step 8	exit Example: Router(config-if)# exit	Exits interface configuration mode.
Step 9	ethernet mac-tunnel virtual tunnel-id Example: Router(config)# ethernet mac-tunnel virtual 1	Configures a virtual MAC-in-MAC tunnel and enters MAC-in-MAC tunnel configuration mode.
Step 10	bridge-domain bridge-id Example: Router(config-tunnel-minm)# bridge-domain 100	Binds the MAC tunnel to the bridge domain instance.
Step 11	service instance id ethernet Example: Router(config-tunnel-minm)# service instance 10 ethernet	Defines an EFP that corresponds to a specific I-SID encapsulation and enters tunnel service configuration mode.
Step 12	encapsulation dot1ah isid isid Example: Router(config-tunnel-srv)# encapsulation dot1ah isid 10000	Configures dot1ah encapsulation for the specified I-SID.
Step 13	bridge-domain bridge-id c-mac Example: Router(config-tunnel-srv)# bridge-domain 30 c-mac	Configures the bridge domain as a customer domain.
Step 14	exit Example: Router(config-tunnel-srv)# exit	Exits tunnel service configuration mode.
Step 15	exit Example: Router(config-tunnel-minm)# exit	Exits MAC-in-MAC tunnel configuration mode.
Step 16	interface vlan vlanid Example: Router(config)# interface vlan 1000	Creates a dynamic SVI, and enters interface configuration mode.
Step 17	xconnect ipaddress vc-id encapsulation mpls Example: Router(config-if)# xconnect 10.243.245.11 100 encapsulation mpls	Binds the attachment circuit to the pseudowire, and configures an Any Transport over MPLS (AToM) static pseudowire. •Specifies MPLS as the tunneling method to encapsulate the data in the pseudowire.
Step 18	exit Example: Router(config-if)# exit	Returns to global configuration mode.

	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	interface gigabitethernet slot/port Example: Router(config)# interface gigabitethernet 6/1	Specifies the Gigabit Ethernet interface to configure as the customer instance port and enters interface configuration mode.
Step 4	service instance id ethernet Example: Router(config-if)# service instance 101 ethernet	Creates an L2 service instance on an interface and enters service instance configuration mode.
Step 5	encapsulation dot1q vlan-id Example: Router(config-if-srv)# encapsulation dot1q 13	Defines the matching criteria to be used in order to map ingress dot1q frames on an interface to the appropriate service instance.
Step 6	bridge-domain bridge-id c-mac Example: Router(config-if-srv)# bridge-domain 12	Specifies the bridging identifier in the I-Component.
Step 7	exit Example: Router(config-if-srv)# exit	Exits service instance configuration mode.
Step 8	exit Example: Router(config-if)# exit	Exits interface configuration mode.
Step 9	ethernet mac-tunnel virtual tunnel-id Example: Router(config)# ethernet mac-tunnel virtual 1	Configures a virtual MAC-in-MAC tunnel and enters MAC-in-MAC tunnel configuration mode.
Step 10	bridge-domain bridge-id Example: Router(config-tunnel-minm)# bridge-domain 100	Binds the MAC tunnel to the bridge domain instance.
Step 11	service instance id ethernet Example: Router(config-tunnel-minm)# service instance 31 ethernet	Defines an EFP that corresponds to a specific I-SID encapsulation and enters tunnel service configuration mode.
Step 12	encapsulation dot1ah isid isid Example: Router(config-tunnel-srv)# encapsulation dot1ah isid 10000	Configures dot1ah encapsulation for the specified I-SID.
Step 13	bridge-domain bridge-id c-mac Example: Router(config-tunnel-srv)# bridge-domain 10 c-mac	Configures the bridge domain as a customer domain.
Step 14	exit Example: Router(config-tunnel-srv)# exit	Exits tunnel service configuration mode.
Step 15	service instance id ethernet Example: Router(config-tunnel-minm)# service instance 41 ethernet	Defines an EFP that corresponds to a specific I-SID encapsulation and enters tunnel service configuration mode.
Step 16	encapsulation dot1ah isid isid Example: Router(config-tunnel-srv)# encapsulation dot1ah isid 20000	Configures dot1ah encapsulation for the specified I-SID.
Step 17	bridge-domain bridge-id c-mac Example: Router(config-tunnel-srv)# bridge-domain 20 c-mac	Configures the bridge domain as a customer domain.
Step 18	exit Example: Router(config-tunnel-srv)# exit	Exits tunnel service configuration mode.
Step 19	exit Example: Router(config-tunnel-minm)# exit	Exits MAC-in-MAC tunnel configuration mode.
Step 20	l2 vfi vfi-name manual Example: Router(config)# l2 vfi myvfi manual	Configures a virtual forwarding instance and enters L2 VFI point-to-point configuration mode.
Step 21	vpn id vpn-id Example: Router(config-vfi)# vpn id 20	Sets a VPN ID on a VPN routing and forwarding (VRF) instance.
Step 22	neighbor ipaddress vcid encapsulation mpls Example: Router(config-vfi)# neighbor 172.16.10.12 2000 encapsulation mpls	Specifies the first router that forms a point-to-point Layer 2 VFI connection.
Step 23	neighbor ipaddress vcid encapsulation mpls Example: Router(config-vfi)# neighbor 172.16.200.120 2000 encapsulation mpls	Specifies the second router that forms a point-to-point Layer 2 VFI connection.
Step 24	exit Example: Router(config-vfi)# exit	Exits L2 VFI point-to-point configuration mode.
Step 25	interface vlan vlanid Example: Router(config)# interface vlan 1000	Creates a dynamic SVI, and enters interface configuration mode.
Step 26	xconnect ipaddress vc-id encapsulation mpls Example: Router(config-if)# xconnect 10.243.245.11 100 encapsulation mpls	Binds the attachment circuit to the pseudowire, and configures an AToM static pseudowire. •Specifies MPLS as the tunneling method to encapsulate the data in the pseudowire.
Step 27	exit Example: Router(config-if)# exit	Returns to global configuration mode.

Related Topic	Document Title
MAC-in-MAC commands: complete command syntax, command mode, command history, defaults, usage guidelines, and examples	Cisco IOS Carrier Ethernet Command Reference
Cisco IOS commands: master list of commands with complete command syntax, command mode, command history, defaults, usage guidelines, and examples	Cisco IOS Master Commands List, All Releases

Standard	Title
IEEE 802.1ah	IEEE 802.1ah - Provider Backbone Bridges

MIB	MIBs Link
None	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

RFC	Title
No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature.	—

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

Table 3 Feature Information for IEEE 802.1ah on Provider Backbone Bridges feature.
Feature Name	Releases	Feature Information
802.1ah/EVC2.0 for 7600 (Infrastructure)	12.2(33)SRE	The IEEE 802.1ah on Provider Backbone Bridges feature enables MAC-in-MAC on EVCs. In Cisco IOS Release 12.2(33)SRE, this feature was introduced on the Cisco 7600 series routers. The following sections provide information about this feature: •Information About IEEE 802.1ah on Provider Backbone Bridges •How to Configure MAC-in-MAC on Provider Backbone Bridges The following commands were introduced or modified: bridge-domain, clear bridge-domain mac table, description, encapsulation dot1ah isid, ethernet mac-tunnel virtual, mac tunnel address destination default, mac tunnel address destination map, service instance ethernet (mac-tunnel), show bridge-domain, show ethernet mac-tunnel engine slot, show ethernet service instance, show ethernet service mac-tunnel.

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