3Com 8800 Configuration Manual page 235

3Com Switch 8800 Configuration Guide
Perform the following configurations in BGP view.
I. Creating a peer group
A BGP peer must belong to a peer group. Before configuring a BGP peer, a peer group
to which the peer belongs must be created first.
Table 21-2 Create a peer group
Create a peer group
Delete the specified peer group
There are two types of BGP peer group, IBGP and EBGP. Using the internal keyword
to create a IBGP peer group. You can use the external keyword to create an EBGP
peer group and sub-AS peer groups inside a confederation. group-name is locally
significant.
The default type of BGP peer group is IBGP.
II. Configuring AS number of an EBGP peer group
You can specify AS number for an EBGP peer group, but IBGP needs no AS number.
When a peer group is specified with an AS number, all its member peers inherit the AS
number.
Table 21-3 Configure AS number of a EBGP peer group
Configure the AS number of the EBGP
peer group
Delete the AS number of the EBGP peer
group
If a peer group has peers, you cannot specify an AS number for the peer group. In
addition, deleting the AS number of a peer group will delete all peers in it.
III. Adding a member to a peer group
A BGP peer must belong to a peer group. If you want to configure a BGP peer, you
need first to create a peer group and then add a peer into the group.
Table 21-4 Create a peer group and add a member
Add a peer to the peer group
Operation
Operation
Operation
Command
group group-name [ internal | external ]
undo group group-name
peer
as-number
undo peer
as-number
peer peer-address group group-name
[ as-number as-number ]
21-6
Chapter 21 BGP Configuration
Command
group-name as-number
group-name as-number
Command