Deployment Guide

Border Gateway Protocol IPv4 (BGPv4) | 367
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.
A peer group must exist before you add a peer to it. If the peer group is disabled (shutdown) the peers
within the group are also disabled (shutdown).
In BGP, you cannot associate a peer to a peer-group without configuring the remote-as for Internal
BGP (IBGP) or External BGP (EBGP).
This command automatically restarts the neighbor session for the configuration to take effect.
Related
Commands
Command
History
neighbor peer-group (creating group)
c e s
Enables you to create a peer group and assign it a name.
Syntax
neighbor peer-group-name peer-group
To delete a peer group, use the no neighbor peer-group-name peer-group command.
Parameters
Defaults
Not configured.
Command Modes
ROUTER BGP
Usage
Information
When a peer group is created, it is disabled (shut mode).
Related
Commands
Command
History
clear ip bgp ipv4 unicast soft Resets BGP sessions.
neighbor peer-group (creating group) Create a peer group.
show ip bgp peer-group View BGP peers.
show ip bgp neighbors View BGP neighbors configurations.
Version 7.8.1.0 Introduced support on S-Series
Version 7.7.1.0 Introduced support on C-Series
peer-group-name
Enter a text string up to 16 characters long as the name of the peer group.
neighbor peer-group (assigning peers) Assign routers to a peer group.
neighbor remote-as Assign a indirectly connected AS to a neighbor or peer group.
neighbor shutdown Disable a peer or peer group.
Version 7.8.1.0 Introduced support on S-Series
Version 7.7.1.0 Introduced support on C-Series