13.4.1 BGP4 peer group

A BGP4 peer group is a way of simplifying settings by grouping peers and performing settings for the group by using the neighbor configuration command. Settings performed with the neighbor command apply to all peers that belong to the specified peer group. You can also use the neighbor command for a specific peer in a peer group. In this case, the individual peer settings override the peer group settings. You can create a peer group consisting of external peers and member AS peers, or internal peers alone, in either BGP4 or BGP4+. Multiple peer groups can be created. A peer can belong to only one peer group. If the peer group to which the peer group belongs is changed, the operation command clear ip bgp * {both| in | out reflects the route filtering of the new peer group.