Reference Guide

Border Gateway Protocol IPv4 (BGPv4) | 193
A neighbor may keep its configuration after it was added to a peer group if the neighbor’s configuration is
more specific than the peer group’s, and the neighbor’s configuration does not affect outgoing updates.
Use the show config command in the CONFIGURATION ROUTER BGP mode to view the
configuration. When you create a peer group, it is disabled (
shutdown). The following example shows the
creation of a peer group (zanzibar).
FTOS(conf-router_bgp)#neighbor zanzibar peer-group
FTOS(conf-router_bgp)#show conf
!
router bgp 45
bgp fast-external-fallover
bgp log-neighbor-changes
neighbor zanzibar peer-group
neighbor zanzibar shutdown
neighbor 10.1.1.1 remote-as 65535
neighbor 10.1.1.1 shutdown
neighbor 10.14.8.60 remote-as 18505
neighbor 10.14.8.60 no shutdown
FTOS(conf-router_bgp)#
Use the neighbor peer-group-name no shutdown command in the CONFIGURATION ROUTER BGP
mode to enable a peer group.
FTOS(conf-router_bgp)#neighbor zanzibar no shutdown
FTOS(conf-router_bgp)#show config
!
router bgp 45
bgp fast-external-fallover
bgp log-neighbor-changes
neighbor zanzibar peer-group
neighbor zanzibar no shutdown
neighbor 10.1.1.1 remote-as 65535
neighbor 10.1.1.1 shutdown
neighbor 10.14.8.60 remote-as 18505
neighbor 10.14.8.60 no shutdown
FTOS(conf-router_bgp)#
To disable a peer group, use the neighbor peer-group-name shutdown command in the CONFIGURATION
ROUTER BGP mode. The configuration of the peer group is maintained, but it is not applied to the peer
group members. When you disable a peer group, all the peers within the peer group that are in
ESTABLISHED state are moved to IDLE state.
Use the show
ip bgp peer-group command in EXEC Privilege mode as shown in the following example to
view the status of peer groups.
FTOS>show ip bgp peer-group
Peer-group zanzibar, remote AS 65535
BGP version 4
Minimum time between advertisement runs is 5 seconds
Note: When you configure a new set of BGP policies for a peer group, always reset the peer
group by entering the clear ip bgp peer-group peer-group-name command in EXEC Privilege mode.