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3Com Router 3000 Ethernet Family
Configuration Guide
For the configuration, refer to the "BGP Configuration" section in "Routing Protocol" of
this manual.
6.2.5 Configuring Local Preference
Different local preference can be configured as a reference of the MBGP route
selection. When an MBGP router has multiple routes to a same destination through
different next hop neighbors, it will choose the route with the highest local preference.
The configuration works both in unicast and multicast.
For this configuration, refer to the "BGP Configuration" section in "Routing Protocol" of
this manual.
6.2.6 Configuring MBGP Timer
After a router establishes MBGP connection with a peer, it sends Keepalive messages
to the peer periodically to check for the smooth connection. If the router does not
receive a single Keepalive message or any other kind of message from the peer within
the defined connection Holdtime, it will think the MBGP connection broken and exit, and
will process the routing information received through this connection as appropriate.
Therefore, the Keepalive message sending interval and MBGP connection Holdtime
are two parameters of great importance in MBGP mechanism.
The configuration works both in unicast and multicast.
For this configuration, refer to the "BGP Configuration" section in "Routing Protocol" of
this manual.
6.2.7 Configuring MBGP Peer/Peer Group
The use of MBGP peer groups is to simplify configuration. When multiple peers with
same configuration are necessary, you can create and configure a peer group, and
then add the peers into the group, since all peers in a group have the same
configuration with the group..
Caution:
Configure the peer group under the guide of technical support engineers.
Perform the configurations in the following subsections in IPv4 multicast sub-address
family view.
Chapter 6 MBGP Multicast Extension Configuration
3Com Corporation
6-5
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