What are the benefits of configuring BGP peer groups?
A. The major benefit of specifying a BGP peer group is that it reduces the amount of system resources (CPU and memory) used in an update generation. It also simplifies BGP configuration since it allows the routing table to be checked only once, and updates to be replicated to all other in-sync peer group members. This can significantly reduce the load, which depends on the number of peer group members, the number of prefixes in the table, and the number of prefixes advertised. Cisco recommends that you group together peers with identical outbound announcement policies. Refer to BGP Peer Groups for more detailed information.
