3Com Switch 8800 Configuration Guide Chapter 31 MBGP Multicast Extension Configuration31-4Table 31-1 Enabling MBGP multicast extension protocolOperation CommandEnter the MBGP multicast addressfamily view ipv4-family multicastRemove the MBGP multicast addressfamily view undo ipv4-family multicastBy default, the system does not run the MBGP multicast extension protocol.31.2.2 Specifying Network Routes Notified by MBGP Multicast ExtensionThe network command is used to specify the network routes to be advertised to MBGPpeers, as well as the mask and route policy of this network route.Perform the following configurations in IPV4 multicast sub-address family view.Table 31-2 Specifying network routes notified by MBGP multicast extensionOperation CommandConfigure the network routes to beadvertised by the local MBGPnetwork ip-address [ address-mask ][ route-policy route-policy-name ]Remove the network routes to beadvertised by the local MBGPundo network ip-address[ address-mask ] [ route-policyroute-policy-name ]By default, no route is advertised by the local MBGP.The network command advertises only the precisely matched route, the one withprefix and mask completely conforming to the configuration. If no mask is specified,match goes by the natural network segment.31.2.3 Configuring the MED Value for an ASThe MED configured in BGP view is valid for both unicast and multicast.For the details of this configuration, refer to “BGP Configuration” of the Routing Protocolpart of this manual.31.2.4 Comparing MED Values from Different AS Neighbor PathsDo not use this configuration unless you are sure that different ASs adopt the same IGPand route selection method. The configuration in BGP view works both in unicast andmulticast.For the details of this configuration, refer to “BGP Configuration” of the Routing Protocolpart of this manual.
