Specifications

Implementing BGP on Cisco IOS XR Software
How to Implement BGP on Cisco IOS XR Software
RC-97
Cisco IOS XR Routing Configuration Guide
DETAILED STEPS
Command or Action Purpose
Step 1
configure
Example:
RP/0/RP0/CPU0:router# configure
Enters global configuration mode.
Step 2
router bgp as-number
Example:
RP/0/RP0/CPU0:router(config)# router bgp 120
Enters BGP configuration mode allowing you to configure
the BGP routing process.
Step 3
bgp router-id ip-address
Example:
RP/0/RP0/CPU0:router(config-bgp)# bgp router-id
10.0.0.0
Configures a fixed router ID for the BGP-speaking router.
Step 4
vrf vrf-name
Example:
RP/0/RP0/CPU0:router(config-bgp)# vrf vrf_pe
Configures a VRF instance.
Step 5
rd { as-number : nn | ip-address : nn | auto}
Example:
RP/0/RP0/CPU0:router(config-bgp-vrf)# rd
345:567
Configures the route distinguisher.
Use the auto keyword if you want the router to
automatically assign a unique RD to the VRF.
Automatic assignment of RDs is possible only if a router ID
is configured using the bgp router-id command in router
configuration mode. This allows you to configure a globally
unique router ID that can be used for automatic RD
generation. The router ID for the VRF does not need to be
globally unique, and using the VRF router ID would be
incorrect for automatic RD generation. Having a single
router ID also helps in checkpointing RD information for
BGP graceful restart, because it is expected to be stable
across reboots.