Configuring Bgp - 3Com 8807 Configuration Manual

364 C 33: BGP C
HAPTER
BGP Peer and Peer
Group

Configuring BGP

ONFIGURATION
Switch 8800 Family series provide various MBGP extended applications, including
extension of multicast, VPN, and so on. Different extended applications should be
configured in their own address family views.
For more information about the commands executed in MBGP address family
view, see "Multicast Protocol" and "MPLS Configuration" of this manual.
Definition of peer and peer group
As described in Section "BGP Routing Mechanism" "BGP Routing Mechanism",
BGP speakers among which messages are exchanged are peers to one another.
Multiple related peers compose a peer group, and multiple related peers compose
a peer group.
Relationship between peer configuration and peer group configuration
In Switch 8800 Family series, 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.
BGP peer group feature can simplify user configuration and improve route
advertisement efficiency. When added into a peer group, a peer inherits all the
configuration of the group.
If the configuration of a peer group changes, the configuration of its member
peers also alters. Some attributes can be configured to a particular member peer
by specifying its IP address. The attributes configured in this way is with higher
priority than those by configuring for peer group. It should be noted that all
member peers must use the same update policy as its group, but may use different
ingress policy.
These categories are involved in BGP configuration:
1 Basic BGP configuration
"Enabling BGP"
■
"Configuring Basic Features for BGP Peer"
■
2 BGP peer configuration
"Configuring application features of a BGP peer (group)"
■
"Configuring Route Filtering of a Peer (group)"
■
3 BGP route configuration
"Configuring Network Routes for BGP Distribution"
■
"Configuring the Interaction between BGP and IGP (Importing IGP Routes)"
■
"Configuring to Permit BGP to Import Default Routes of Other Protocols"
■
"Configuring BGP Route Aggregation"
■
"Configuring BGP Route Filtering"
■
"Configuring BGP Route Dampening"
■
4 BGP protocol configuration
"Configuring BGP Preference"
■