1-17To do… Use the command… RemarksAdd a peer to the BGPMDT peer grouppeer ip-address groupgroup-nameOptionalBy default, a BGP MDT peerbelongs to no peer groups.A BGP MDT peer or peer group is a peer or peer group created in BGP-MDT subaddress family view.Configuring a BGP MDT Route ReflectorBGP MDT peers in the same AS must be fully meshed to maintain connectivity. However, when manyBGP MDT peers exist in an AS, connection establishment among them may cause great expenses. Toreduce connections between them, you can configure one of them as a route reflector and specify otherrouters as clients. The clients establish BGP MDT connections with the route reflector, and the routereflector forwards (reflects) BGP MDT routing information between clients. In this way, the clients neednot to be fully meshed. Furthermore, you can disable client-to-client reflection to reduce overloads if theclients have been fully meshed.The route reflector and its clients form a cluster. In general, a cluster has only one route reflector whoserouter ID identifies the cluster. However, you can configure several route reflectors in a cluster toimprove network reliability, and they must have the same cluster ID configured to avoid routing loops.Follow these steps to configure a BGP MDT route reflector:To do… Use the command… RemarksEnter system view system-view —Enter BGP view bgp as-number —Enter BGP MDT sub-addressfamily view ipv4-family mdt —Configure the local device as aroute reflector and specify itsclientspeer { group-name |ip-address } reflect-clientRequiredBy default, neither routereflectors nor clients exist.Disable route reflectionbetween clientsundo reflectbetween-clientsOptionalEnabled by default.Configure the cluster ID of theroute reflectorreflector cluster-id{ cluster-id | ip-address }OptionalBy default, a route reflector usesits router ID as the cluster ID.
