Cisco Systems 3560 Manual De Usuario

Beginning in privileged EXEC mode, follow these steps to alter the method in which a VLAN interface 
dynamically accesses a multicast router:

To return to the default learning method, use the no ip igmp snooping vlan vlan-id mrouter learn cgmp 
global configuration command.

This example shows how to configure IGMP snooping to use CGMP packets as the learning method:

Switch# configure terminal

Switch(config)# ip igmp snooping vlan 1 mrouter learn cgmp

Switch(config)# end 

To add a multicast router port (add a static connection to a multicast router), use the ip igmp snooping 
vlan mrouter global configuration command on the switch. 

Static connections to multicast routers are supported only on switch ports.

Beginning in privileged EXEC mode, follow these steps to enable a static connection to a multicast 
router:

Enter global configuration mode.

ip igmp snooping vlan vlan-id mrouter 
learn {cgmp | pim-dvmrp}

Enable IGMP snooping on a VLAN. The VLAN ID range is 1 to 1001 
and 1006 to 4094.

Specify the multicast router learning method:

cgmp—Listen for CGMP packets. This method is useful for 
reducing control traffic.

pim-dvmrp—Snoop on IGMP queries and PIM-DVMRP 
packets. This is the default.

Return to privileged EXEC mode.

Verify the configuration.

(Optional) Save your entries in the configuration file.

Enter global configuration mode.

ip igmp snooping vlan vlan-id mrouter 
interface interface-id

Specify the multicast router VLAN ID and the interface to the 
multicast router.

The VLAN ID range is 1 to 1001 and 1006 to 4094.

The interface can be a physical interface or a port channel. 
The port-channel range is 1 to 48.

Return to privileged EXEC mode.