3com S7906E Instruccion De Instalación

 

1-17 

Add a peer to the BGP 
MDT peer group 

peer ip-address group 
group-name 

Optional 

By default, a BGP MDT peer 
belongs to no peer groups.  

 

A BGP MDT peer or peer group is a peer or peer group created in BGP-MDT subaddress family view. 

 

BGP MDT peers in the same AS must be fully meshed to maintain connectivity. However, when many 

BGP MDT peers exist in an AS, connection establishment among them may cause great expenses. To 

reduce connections between them, you can configure one of them as a route reflector and specify other 

routers as clients. The clients establish BGP MDT connections with the route reflector, and the route 

reflector forwards (reflects) BGP MDT routing information between clients. In this way, the clients need 

not to be fully meshed. Furthermore, you can disable client-to-client reflection to reduce overloads if the 

clients have been fully meshed.  

The route reflector and its clients form a cluster. In general, a cluster has only one route reflector whose 

router ID identifies the cluster. However, you can configure several route reflectors in a cluster to 

improve network reliability, and they must have the same cluster ID configured to avoid routing loops. 

Follow these steps to configure a BGP MDT route reflector: 

Enter system view 

system-view 

— 

Enter BGP view 

bgp as-number 

— 

Enter BGP MDT sub-address 
family view 

ipv4-family mdt 

— 

Configure the local device as a 
route reflector and specify its 
clients 

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

Required 

By default, neither route 
reflectors nor clients exist. 

Disable route reflection 
between clients 

undo reflect 
between-clients 

Optional 

Enabled by default.  

Configure the cluster ID of the 
route reflector 

reflector cluster-id 
{ cluster-id | ip-address } 

Optional 

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