Enabling or disabling IGMP snooping

IGMP snooping is disabled by default. The default behavior is to flood multicast traffic in the VLAN. Use the following to enable IGMP snooping.

Prerequisites

You must be in the VLAN configuration context, as indicated by the switch(config-vlan)# prompt.

The VLAN has to be configured and up.

Procedure

Enable IGMP snooping on a VLAN using the following command.

ip igmp snooping {enable | disable}

For example, the following command enables IGMP snooping on VLAN 2:

switch# configure terminal
switch(config)# vlan 2
switch(config-vlan)# ip igmp snooping enable

Use the disable parameter to disable IGMP snooping on a VLAN.