Reference Guide

Command Modes ROUTER BGP
Command History
Version Description
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
8.2.1.0 Introduced on the E-Series ExaScale.
7.4.1.0 Introduced
Usage Information Route reflection to clients is not necessary if all client routers are fully meshed.
Related
Commands
• bgp cluster-id – assigns an ID to a BGP cluster with two or more route
reflectors.
• neighbor route-reflector-client – configures a route reflector and clients.
bgp cluster-id
Assign a cluster ID to a BGP cluster with more than one route reflector.
C9000 Series
Syntax
bgp cluster-id {ip-address | number}
To delete a cluster ID, use the no bgp cluster-id {ip-address | number}
command.
Parameters
ip-address Enter an IP address as the route reflector cluster ID.
number Enter a route reflector cluster ID as a number from 1 to
4294967295.
Defaults Not configured.
Command Modes ROUTER BGP
Command History
Version Description
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
8.2.1.0 Introduced on the E-Series ExaScale.
7.4.1.0 Introduced
Usage Information
When a BGP cluster contains only one route reflector, the cluster ID is the route
reflector’s router ID. For redundancy, a BGP cluster may contain two or more route
reflectors and you assign a cluster ID with the bgp cluster-id command.
Without a cluster ID, the route reflector cannot recognize route updates from the
other route reflectors within the cluster.
Border Gateway Protocol
535