Chapter 29
| IP Routing Commands
Border Gateway Protocol (BGPv4)
– 931 –
bgp client-to-client
reflection
This command restores route reflection via this router. Use the no form to disable
route reflection.
Syntax
[no] bgp client-to-client reflection
Command Mode
Router Configuration
Default Setting
Enabled
Command Usage
â—† Route reflection from this device is enabled by default, but is only functional if a
client has been configured with the neighbor route-reflector-client command.
â—† Route reflection is not required if all of the routers in an AS are fully meshed as
normally required by interior BGP. However, to make interior BGP more scalable,
route reflection or confederations can be used. Route reflection uses one or
more route reflectors to reflect routes between specified clients within a
cluster. Clients within a reflector cluster therefore need not be fully meshed,
and the exchange of routing information is thereby reduced since the clients
need not communicate with any routers outside of the cluster.
â—† Routing information from an external BGP router is advertised to all cluster
clients and non-client peers. Information from a non-client peer is advertised to
all clients. And information from cluster members is reflected to all routing
peers, both inside and outside of the cluster. using this model, the local AS can
be divided into many clusters.
â—† Use the bgp cluster-id command to designate route reflectors within the same
cluster so that route reflectors can recognize updates from other route
reflectors in the same cluster.
Example
Console(config-router)#bgp client-to-client reflection
Console(config-router)#
Related Commands
neighbor route-reflector-client (968)
bgp cluster-id (932)
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