392 CHAPTER 30: BGP CONFIGURATIONConfiguring a BGP RouteReflectorFollow these steps to configure a BGP route reflector:n ■ In general, it is not required to make clients of a route reflector fully meshed.The route reflector forwards routing information between clients. If clients arefully meshed, you can disable route reflection between clients to reducerouting costs.■ In general, a cluster has only one route reflector, and the router ID is used toidentify the cluster. You can configure multiple route reflectors to improvenetwork stability. In this case, you need to specify the same cluster ID for theseroute reflectors to avoid routing loops.Configuring a BGPConfederationFollow these steps to configure a BGP confederation:n ■ A confederation contains 32 sub-ASs at most. The as-number of a sub-AStakes effect in the confederation only.■ If routers not compliant with RFC 3065 exist in the confederation, you can usethe confederation nonstandard command to make the local routercompatible with these routers.Configuring BGP GRn A device can act as both a GR Restarter and GR Helper at the same time.Follow these steps to configure BGP GR:To do… Use the command… RemarksEnter system view system-view -Enter BGP view bgp as-number -Configure the router as aroute reflector and specify apeer/peer group as its clientpeer { group-name |ip-address } reflect-clientRequiredNot configured by defaultEnable route reflectionbetween clientsreflect between-clients OptionalEnabled by defaultConfigure the cluster ID of theroute reflectorreflector cluster-id cluster-id OptionalBy default, a route reflectoruses its router ID as the clusterID.To do… Use the command… RemarksEnter system view system-view -Enter BGP view bgp as-number -Configure a BGPconfederationConfigure aconfederation IDconfederation idas-numberRequiredNot configured bydefaultSpecify sub-ASscontained in theconfederationconfederation peer-asas-number-listEnable compatibility with routers notcompliant with RFC 3065 in theconfederationconfederationnonstandardOptionalNot enabled by default
