
Implementing BGP on Cisco IOS XR Software
Configuration Examples for Implementing BGP on Cisco IOS XR Software
RC-129
Cisco IOS XR Routing Configuration Guide
In a BGP speaker in autonomous system 6003, the peers from autonomous systems 6001 and 6002 are
configured as special eBGP peers. Peer 200.200.200.200 is a normal eBGP peer from autonomous
system 701.
router /jointfilesconvert/455219/bgp 6003
/jointfilesconvert/455219/bgp confederation identifier 666
/jointfilesconvert/455219/bgp confederation peers
6001
6002
exit
address-family ipv4 unicast
neighbor 171.69.232.57
remote-as 6001
exit
address-family ipv4 unicast
neighbor 171.69.232.55
remote-as 6002
exit
address-family ipv4 unicast
neighbor 200.200.200.200
remote-as 701
exit
address-family ipv4 unicast
route-policy pass-all in
route-policy pass-all out
The following is a part of the configuration from the BGP speaker 200.200.200.205 from autonomous
system 701 in the same example. Neighbor 171.69.232.56 is configured as a normal eBGP speaker from
autonomous system 666. The internal division of the autonomous system into multiple autonomous
systems is not known to the peers external to the confederation.
router /jointfilesconvert/455219/bgp 701
address-family ipv4 unicast
neighbor 171.69.232.56
remote-as 666
exit
address-family ipv4 unicast
route-policy pass-all in
route-policy pass-all out
exit
address-family ipv4 unicast
neighbor 200.200.200.205
remote-as 701
BGP Route Reflector: Example
The following example shows how to use an address family to configure internal BGP peer 10.1.1.1 as
a route reflector client for both unicast and multicast prefixes:
router /jointfilesconvert/455219/bgp 140
address-family ipv4 unicast
neighbor 10.1.1.1
remote-as 140
address-family ipv4 unicast
route-reflector-client
exit
address-family ipv4 multicast
route-reflector-client
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