IGMP snooping works only when a multicast router that has been dynamically learned as a Querier exists in the VLAN. Even when IGMP snooping is enabled, if the VLAN does not hear a query from a multicast router, the group reports from the hosts are not processed.
To enable IGMP snooping:
| The VLAN dialog box opens with the Basic tab displayed. |
| The Snoop tab opens. |