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Implementing BGP on Cisco IOS XR Software
Information About Implementing BGP on Cisco IOS XR Software
RC-12
Cisco IOS XR Routing Configuration Guide
The following example displays sample output from the show bgp neighbors command using the
inheritance keyword. The example shows that the neighbor inherits session parameters from neighbor
group GROUP_1, which in turn inherits from session group GROUP_2. The neighbor inherits IPv4
unicast parameters from address family group GROUP_3 and IPv4 multicast parameters from neighbor
group GROUP_1:
RP/0/RP0/CPU0:router# show bgp neighbors 192.168.0.1 inheritance
Session: n:GROUP_1 s:GROUP_2
IPv4 Unicast: a:GROUP_3
IPv4 Multicast: n:GROUP_1
The following example displays sample output from the show bgp neighbors command using the
configuration keyword. The example shows from where each item of configuration was inherited, or if
it was configured directly on the neighbor (indicated by [ ]). For example, the ebgp-multihop 3
command was inherited from neighbor group GROUP_1 and the next-hop-self command was inherited
from the address family group GROUP_3:
RP/0/RP0/CPU0:router# show bgp neighbors 192.168.0.1 configuration
neighbor 192.168.0.1
remote-as 2 []
advertisement-interval 15 [n:GROUP_1 s:GROUP_2]
ebgp-multihop 3 [n:GROUP_1]
address-family ipv4 unicast []
next-hop-self [a:GROUP_3]
route-policy POLICY_1 in [a:GROUP_3]
weight 200 []
address-family ipv4 multicast [n:GROUP_1]
default-originate [n:GROUP_1]
show bgp af-group
Use the show bgp af-group command to display address family groups:
• Use the configuration keyword to display the effective configuration for the address family group,
including any settings that have been inherited from address family groups used by this address
family group.
• Use the inheritance keyword to display the address family groups from which this address family
group is capable of inheriting configuration.
• Use the users keyword to display the neighbors, neighbor groups, and address family groups that
inherit configuration from this address family group.
The show bgp af-group command examples that follow are based on the this sample configuration:
RP/0/RP0/CPU0:router(config)# router bgp 140
RP/0/RP0/CPU0:router(config-bgp)# af-group GROUP_3 address-family ipv4 unicast
RP/0/RP0/CPU0:router(config-bgp-afgrp)# remove-private-as
RP/0/RP0/CPU0:router(config-bgp-afgrp)# route-policy POLICY_1 in
RP/0/RP0/CPU0:router(config-bgp-afgrp)# exit
RP/0/RP0/CPU0:router(config-bgp)# af-group GROUP_1 address-family ipv4 unicast
RP/0/RP0/CPU0:router(config-bgp-afgrp)# use af-group GROUP_2
RP/0/RP0/CPU0:router(config-bgp-afgrp)# maximum-prefix 2500 75 warning-only
RP/0/RP0/CPU0:router(config-bgp-afgrp)# default-originate
RP/0/RP0/CPU0:router(config-bgp-afgrp)# exit
RP/0/RP0/CPU0:router(config-bgp)# af-group GROUP_2 address-family ipv4 unicast
RP/0/RP0/CPU0:router(config-bgp-afgrp)# use af-group GROUP_3
RP/0/RP0/CPU0:router(config-bgp-afgrp)# send-community-ebgp
RP/0/RP0/CPU0:router(config-bgp-afgrp)# send-extended-community-ebgp
RP/0/RP0/CPU0:router(config-bgp-afgrp)# capability orf prefix-list both