3com 8807 User Guide

The multicast common configuration is for both the multicast group management 
protocol and the multicast routing protocol. The configuration includes enabling IP 
multicast routing, displaying multicast routing table and multicast forwarding 
table, etc.

Common multicast configuration includes:

■

Enabling multicast routing

■

Configuring multicast route limit

■

Clearing MFC (Multicast Forwarding Cache) forwarding entries or its statistic 
information

■

Configuring managed multicast

■

Clearing route entries from the kernel multicast routing table

■

Configuring broadcast/multicast suppression

Enable multicast routing first before enabling multicast routing protocol.

Perform the following configuration in system view.

By default, multicast routing is disabled.

c 

Because too many multicast routing table entries may exhaust the router memory, 
you need to limit the size of the multicast routing table.

Table 423   Enable multicast routing

Enable multicast routing 

multicast routing-enable 

Disable multicast routing 

Table 424   Configure multicast routing table size limit

Enter system view 

system-view 

- 

Configure multicast routing 
table size limit 

multicast route-limit limit 

By default, the maximum 
multicast routing table entries 
is 512