3com S7906E Manuel De Montage

 

1-40 

Advertise the 
community attribute to 
a peer/peer group 

peer { group-name | ip-address } 
advertise-community 

Advertise the 
community 
attribute to a 
peer/peer group 

Advertise the 
extended community 
attribute to a peer/peer 
group 

peer { group-name | ip-address } 
advertise-ext-community 

Required 

Not configured 
by default. 

Apply a routing policy to routes advertised 
to a peer/peer group 

peer { group-name | ip-address } 
route-policy route-policy-name 
export 

Required 

Not configured 
by default. 

 

If an AS has many BGP routers, you can configure them as a cluster and configure one of them as a 

route reflector and others as clients to reduce iBGP connections. 

To enhance network reliability and prevent single point failures, you can specify multiple route reflectors 

for a cluster. The route reflectors in the cluster must have the same cluster ID specified to avoid routing 

loops. 

Follow these steps to configure a BGP route reflector: 

Enter system view 

— 

Enter BGP view 

bgp as-number 

— 

Configure the router as a route 
reflector and specify a 
peer/peer group as its client 

peer { group-name | 
ip-address } reflect-client 

Required 

Not configured by default. 

Enable route reflection 
between clients 

Optional 

Enabled by default 

Configure the cluster ID of the 
route reflector 

reflector cluster-id cluster-id 

Optional 

By default, a route reflector 
uses its router ID as the cluster 
ID. 

 

z 

In general, it is not required to make clients of a route reflector fully meshed. The route reflector 

forwards routing information between clients. If clients are fully meshed, you can disable route 

reflection between clients to reduce routing costs. 

z 

In general, a cluster has only one route reflector, and the router ID is used to identify the cluster. 

You can configure multiple route reflectors to improve network stability. In this case, you need to 

specify the same cluster ID for these route reflectors using the reflector cluster-id command to 

avoid routing loops.