1-39Peers added in the group can have different AS numbers.Follow these steps to configure an eBGP peer group using the third approach:To do… Use the command… RemarksEnter system view system-view —Enter BGP view bgp as-number —Create an eBGP peer group group group-name external RequiredAdd a peer into the group andspecify its AS numberpeer ip-address groupgroup-name as-numberas-numberRequiredz Do not specify any AS number for a peer before adding it into the peer group.z Peers added in the group can have different AS numbers.Configuring BGP community can also help simplify routing policy management, and a community has amuch larger management scope than a peer group by controlling routing policies of multiple BGProuters.To guarantee the connectivity between iBGP peers, you need to make them fully meshed. But itbecomes unpractical when there are large numbers of iBGP peers. Configuring route reflectors orconfederation can solve it. In a large-scale AS, both of them can be used.Configuring BGP CommunityA BGP community is a group of destinations with the same characteristics. It has no geographicalboundaries and is independent of ASs.You can configure a route policy to define which destinations belong to a BGP community and thenadvertise the community attribute to a peer/peer group.You can apply a route policy to filter routes advertised to/received from a peer/peer group according tothe community attribute. This way helps simplify policy configuration and management.For how to configure a route policy, refer to Route Policy Configuration in the IP Routing Volume.Follow these steps to configure BGP community:To do… Use the command… RemarksEnter system view system-view —Enter BGP view bgp as-number —
