Bridging on IOS XR Trunk Interfaces: Example
This example shows how to configure a as a simple L2 switch.
Important notes:
Create a bridge domain that has four attachment circuits (AC). Each AC is an IOS XR trunk interface (i.e.
not a subinterface/EFP).
• This example assumes that the running config is empty, and that all the components are created.
• This example provides all the necessary steps to configure the to perform switching between the interfaces.
However, the commands to prepare the interfaces such as no shut, negotiation auto, etc., have been
excluded.
• The bridge domain is in a no shut state, immediately after being created.
• Only trunk (i.e. main) interfaces are used in this example.
• The trunk interfaces are capable of handling tagged (i.e. IEEE 802.1Q) or untagged (i.e. no VLAN header)
frames.
• The bridge domain learns, floods, and forwards based on MAC address. This functionality works for
frames regardless of tag configuration.
• The bridge domain entity spans the entire system. It is not necessary to place all the bridge domain ACs
on a single LC. This applies to any bridge domain configuration.
• The show bundle and the show l2vpn bridge-domain commands are used to verify that the router was
configured as expected, and that the commands show the status of the new configurations.
• The ACs in this example use interfaces that are in the admin down state.
Configuration Example
RP/0/RSP0/CPU0:router#config
RP/0/RSP0/CPU0:router(config)#interface Bundle-ether10
RP/0/RSP0/CPU0:router(config-if)#l2transport
RP/0/RSP0/CPU0:router(config-if-l2)#interface GigabitEthernet0/2/0/5
RP/0/RSP0/CPU0:router(config-if)#bundle id 10 mode active
RP/0/RSP0/CPU0:router(config-if)#interface GigabitEthernet0/2/0/6
RP/0/RSP0/CPU0:router(config-if)#bundle id 10 mode active
RP/0/RSP0/CPU0:router(config-if)#interface GigabitEthernet0/2/0/0
RP/0/RSP0/CPU0:router(config-if)#l2transport
RP/0/RSP0/CPU0:router(config-if-l2)#interface GigabitEthernet0/2/0/1
RP/0/RSP0/CPU0:router(config-if)#l2transport
RP/0/RSP0/CPU0:router(config-if-l2)#interface TenGigE0/1/0/2
RP/0/RSP0/CPU0:router(config-if)#l2transport
RP/0/RSP0/CPU0:router(config-if-l2)#l2vpn
RP/0/RSP0/CPU0:router(config-l2vpn)#bridge group examples
RP/0/RSP0/CPU0:router(config-l2vpn-bg)#bridge-domain test-switch
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd)#interface Bundle-ether10
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd-ac)#exit
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd)#interface GigabitEthernet0/2/0/0
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd-ac)#exit
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd)#interface GigabitEthernet0/2/0/1
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd-ac)#exit
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd)#interface TenGigE0/1/0/2
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd-ac)#commit
RP/0/RSP0/CPU0:Jul 26 10:48:21.320 EDT: config[65751]: %MGBL-CONFIG-6-DB_COMMIT :
Configuration committed by user 'lab'. Use 'show configuration commit changes 1000000973'
to view the changes.
L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
327
Implementing Multipoint Layer 2 Services
Bridging on IOS XR Trunk Interfaces: Example