OS10 Enterprise Edition User Guide Release 10.4.0E(R3)

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Route reflector clusters

BGP route reflectors are intended for ASs with a large mesh. They reduce the amount of BGP control traffic. With route reflection configured properly, IBGP routers are not fully meshed within a cluster but all receive routing information.

Configure clusters of routers where one router is a concentration router and the others are clients who receive their updates from the concentration router.

  1. Assign an ID to a router reflector cluster in ROUTER-BGP mode. You can have multiple clusters in an AS.
    cluster-id 
                                           cluster-id
                                        
  2. Assign a neighbor to the router reflector cluster in ROUTER-BGP mode.
    neighbor {
                                           ip-address}
                                        
  3. Configure the neighbor as a route-reflector client in ROUTER-NEIGHBOR mode, then return to ROUTER-BGP mode.
    route-reflector-client
                                           exit
                                        
  4. Assign a peer group template as part of the route-reflector cluster in ROUTER-BGP mode.
    template 
                                           template-name
                                        
  5. Configure the template as the route-reflector client in ROUTER-TEMPLATE mode.
    route-reflector-client

When you enable a route reflector, the system automatically enables route reflection to all clients. To disable route reflection between all clients in this reflector, use the no bgp client-to-client reflection command in ROUTER-BGP mode. You must fully mesh all the clients before you disable route reflection.

Configure BGP route reflector

OS10(config)# router bgp 102
                                 OS10(conf-router-bgp-102)# cluster-id 4294967295
                                 OS10(conf-router-bgp-102)# neighbor 32.1.1.2
                                 OS10(conf-router-neighbor)# route-reflector-client
                                 OS10(conf-router-neighbor)# exit
                                 OS10(conf-router-bgp-102)# template zanzibar
                                 OS10(conf-router-template)# route-reflector-client
                              

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