3com 3031 Instruccion De Instalación

C

HAPTER

 42: BGP C

ONFIGURATION

Figure 137   The route reflector diagram

The reflector is the router that performs the route reflection function. The route 
reflector regards the IBGP peers as client and non-client. A route reflector and its 
clients constitute a cluster. In an AS, all other peers not belonging to the cluster 
are non clients. The specification of a route reflector and the joining of a client are 
implemented via the 

 command.

The non-client peer and the route reflector, as well as one non-client peer and the 
other non-client peer, forms a fully connected network because they follow the 
basic principles of IBGP fully connected network. A client should not create peer 
relationship with IBGP outside its corresponding cluster. The route reflection 
function is only completed on route reflector, and all client peers and non-client 
peers are routine BGP peers. The client peers are client peers just because the 
route reflector lists them as client peers.

Perform the following configurations in BGP view.

By default, disable route reflection between clients.

Generally speaking, there is a route reflector in a cluster, whose ID identifies the 
cluster.

Perform the following configurations in BGP view.

Table 657   Configuring route reflection between clients

Enable route reflection between clients

Disable route reflection between clients

Table 658   Configuring the cluster ID of the route reflector

Configure the Cluster ID of the 
route reflector

reflector cluster-id { cluster-id | 
address }

EBGP

EBGP

Route reflector

Reflected route

Update route

Router A

Router B

Router C