Reference Guide

230 | Border Gateway Protocol IPv4 (BGPv4)
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Configure BGP route reflectors
BGP route reflectors are intended for Autonomous Systems with a large mesh and 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 others are clients who receive
their updates from the concentration router.
Use the following commands in the CONFIGURATION ROUTER BGP mode to configure a route
reflector.
To view a route reflector configuration, use the
show config command in the CONFIGURATION
ROUTER BGP mode or
show running-config bgp in EXEC Privilege mode.
When you enable a route reflector, FTOS 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
CONFIGURATION ROUTER BGP mode. All clients should be fully meshed before you disable route
reflection.
Aggregate routes
FTOS provides multiple ways to aggregate routes in the BGP routing table. At least one specific route of
the aggregate must be in the routing table for the configured aggregate to become active.
Command Syntax Command Mode Purpose
bgp cluster-id cluster-id CONFIG-ROUTER-
BGP
Assign an ID to a router reflector cluster.
You can have multiple clusters in an AS.
neighbor {ip-address |
peer-group-name}
route-reflector-client
CONFIG-ROUTER-
BGP
Configure the local router as a route reflector and the
neighbor or peer group identified is the route reflector
client.