Administrator Guide

Layer 3 Routing Commands 1246
Syntax
bgp cluster-id cluster-id
no bgp cluster-id
• cluster-id —A non-zero 32-bit identifier that uniquely identifies a cluster
of route reflectors and their clients. The cluster ID may be entered in
dotted notation like an IPv4 address or as an integer.
Default Configuration
A route reflector whose cluster ID has not been configured uses its BGP
router ID (configured with bgp router-id) as the cluster ID.
Command Mode
BGP Router Configuration mode
User Guidelines
A route reflector and its clients form a cluster. Since a cluster with a single
route reflector has a single point of failure, a cluster may be configured with
multiple route reflectors. To avoid sending multiple copies of a route to a
client, each route reflector in a cluster should be configured with the same
cluster ID. Route reflectors with the same cluster ID must have the same set
of clients; otherwise, some routes may not be reflected to some clients. The
same cluster ID is used for both IPv4 and IPv6 route reflection.
Command History
Introduced in version 6.2.0.1 firmware.
Example
console(config-router)#bgp cluster-id 1
bgp default local-preference
Use the bgp default local-preference command to enable the network
operator to specify the default local preference. Local preference is an
attribute sent to internal peers to indicate the degree of preference for a
route. A route with a numerically higher local value is preferred over a route
with a numerically lower value.
2CSNXXX_SWUM204.book Page 1246 Monday, January 25, 2016 1:25 PM