3com S7906E Manuel De Montage

 

1-37 

Enter system view 

— 

Enter BGP view 

bgp as-number 

— 

Forbid session establishment with a 
peer or peer group 

peer { group-name | 
ip-address } ignore 

Optional 

Not forbidden by default 

 

In a large-scale BGP network, configuration and maintenance become difficult due to large numbers of 

BGP peers. To facilitate configuration in this case, you can configure peer group, community, route 

reflector or confederation as needed.  

Peering nodes are accessible to each other at the network layer. 

A peer group is a group of peers with the same route selection policy. 

In a large scale network, many peers may use the same route selection policy. You can configure a peer 

group and add these peers into this group. In this way, peers can share the same policy as the peer 

group. When the policy of the group is modified, the modification also applies to peers in it, thus 

simplifying configuration. 

A peer group is an iBGP peer group if peers in it belong to the same AS, and is an eBGP peer group if 

peers in it belong to different ASs.  

Note that: 

If a peer group has peers added, you cannot remove its AS number using the undo form of the 

command or change its AS number. 

After you create an iBGP peer group and then add a peer into it, the system creates the peer in BGP 

view and specifies the local AS number for the peer. 

Follow these steps to configure an iBGP peer group: 

Enter system view 

— 

Enter BGP view 

bgp as-number 

— 

Create an iBGP peer group 

group group-name [ internal ]

Required 

Add a peer into the iBGP peer 
group 

peer ip-address group 
group-name 

Required