13.5.7 Configuring route reflection

This section describes how to configure a confederation using the following figure as a reference.

Figure 13-30: Example of route reflection configuration

<Structure of this section>

(1) List of configuration commands

The following table lists the commands used to configure route reflection.

Table 13-21: List of configuration commands
Command name	Description
bgp client-to-client reflection	Specifies that BGP4 routes are to be reflected between the route reflector and clients.
bgp cluster-id	Specifies the cluster ID to be used in route reflection.
bgp router-id	If bgp cluster-id is not set, the router ID is used as the cluster ID for route reflection.
neighbor always-nexthop-self	Specifies that the NEXT_HOP attribute of routes advertised to an internal peer (including route reflection) is to be forcibly changed to the local address being used for peering with the internal peer.
neighbor route-reflector-client	Specifies the route reflector client.

(2) Configuring Route Reflection

Points to note: The bgp client-to-client reflection configuration command is enabled by default and does not need to be set. If you do not want BGP4 routes to be reflected between the route reflector and clients, use the no bgp client-to-client reflection command in config-router mode.

Command examples

(config)# router bgp 65531

(config-router)# bgp router-id 192.168.1.100

(config-router)# neighbor 172.16.2.2 remote-as 65532

(config-router)# neighbor 192.168.2.2 remote-as 65531

(config-router)# neighbor 192.168.3.2 remote-as 65531

(config-router)# neighbor 192.168.4.2 remote-as 65531

(config-router)# neighbor 192.168.5.2 remote-as 65531

Configures the BGP4 peers, defining Router 1 as an external peer and Routers 2 to 5 as internal peers.
(config-router)# bgp cluster-id 10.1.2.1

Sets the cluster ID.
(config-router)# neighbor 192.168.2.2 route-reflector-client

(config-router)# neighbor 192.168.3.2 route-reflector-client

(config-router)# neighbor 192.168.4.2 route-reflector-client

Defines Routers 2, 3, and 4 as route reflector clients.