3Com 10014299 By default, there is no BGP peer in a peer group, Add a Peer to the BGP Peer Group

456CHAPTER 30: CONFIGURING BGP

holdtime-intervalattribute is 180 seconds and may have a time interval ranging from 3 to 42949675 seconds.

Configuring a BGP Peer The BGP peer group command can be used for user configuration. When starting Group several peers of the same configuration, you can first create and configure one

peer group, then add other peer groups into this group to get the same configuration.

Configuring a basic BGP peer group includes creating a peer group and adding a peer to the group.

Perform the following peer group configuration in BGP view.

1Create a peer group

By default, a IBGP peer is added to the default peer group and no configuration is necessary. The configuration of route updating strategy to any IBGP peer is only applicable to other IBGP peers in the group. If the router is not configured as a route reflector, all IBGP peers are in one group. Otherwise, all route reflection clients are in one group and non-clients are in another group.

The members of an external peer group must be in the same network segment, otherwise some EBGP peers may discard the route updating information you have sent.

All peers in this group must be configured with an AS number, if this group is not configured with an AS number. If you add an AS number to the peer group, any peer in this group cannot be configured with an AS number different from this peer group AS number.

The members of the peer group cannot be configured with a route updating strategy different from that of the group but different access strategy is permitted.

Table 526 Create a Peer Group

Operation	Command
Create a peer group	peer group-name	group
Delete a specified peer group	undo peer group-namegroup
Reset the connection of all members in	reset bgp group	group-name
the peer group

By default, no peer group is created.

2Add a peer to the BGP peer group

Add one BGP peer into the peer group to create a peer group. When the configuration of the peer group is changed, the configuration of each peer should also be changed accordingly. IBGP peer and EBGP peer cannot be in the same group.

Table 527 Add a Peer to the BGP Peer Group

Operation	Command
Add a peer to the BGP peer group	peer peer-address group group-name
Delete a member from the BGP peer	undo peer peer-addressgroup
group	group-name

By default, there is no BGP peer in a peer group.