Cisco Catalyst 4500 Series Command Reference Manual page 397

Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
Usage Guidelines You enter this command in VLAN interface configuration mode only.
The interface to the switch must be in the VLAN where you are entering the command. It must be both
administratively up and line protocol up.
The CGMP learning method can decrease control traffic.
The learning method that you configure is saved in NVRAM.
The static connections to multicast interfaces are supported only on switch interfaces.
Examples
This example shows how to specify the next-hop interface to a multicast switch:
Switch(config-if)# ip igmp snooping 400 mrouter interface fastethernet 5/6
Switch(config-if)#
This example shows how to specify the multicast switch learning method:
Switch(config-if)# ip igmp snooping 400 mrouter learn cgmp
Switch(config-if)#
Related Commands Command
ip igmp snooping
ip igmp snooping vlan immediate-leave
ip igmp snooping vlan static
show ip igmp snooping
show ip igmp snooping mrouter
OL-27596 -01
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
Description
Enable IGMP snooping.
Enable IGMP immediate-leave processing.
Configures a Layer 2 interface as a member of a group.
Displays information on dynamically learned and manually
configured VLAN switch interfaces.
Displays information on the dynamically learned and
manually configured multicast switch interfaces.
ip igmp snooping vlan mrouter
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