To use the IGMP Layer 2 Querier feature you must designate the IGMP Layer 2 Querier source IP address, the address the system uses in the query message.
Enable IGMP Layer 2 Querier.
You must configure the IGMP Layer 2 Querier address to an IP address in the IP subnet that IGMP hosts, and to which IGMP snoopers in the VLAN belong.
The default IP address is 0.0.0.0 when the IGMP Layer 2 Querier is disabled.
Enable the IGMP Layer 2 Querier feature for VLAN 4, and configure the querier address. Verify the configuration.
Switch:1>enable Switch:1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Switch:1(config)#interface vlan 4 Switch:1(config-if)#ip igmp snoop-querier Switch:1(config-if)#ip igmp snoop-querier-addr 192.0.2.1
Switch:1#show ip igmp snooping
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Igmp Snooping - GlobalRouter
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IFINDEX SNOOP PROXY SSM STATIC ACTIVE MROUTER
ENABLE SNOOP SNOOP MROUTER MROUTER EXPIRATION
ENABLE ENABLE PORTS PORTS TIME
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V2 false false false 0
V3 false false false 0
V4 true false false 0
V200 false false false 0
IFINDEX SNOOP CONFIGURED DYNAMIC COMPATIBILITY
QUERIER QUERIER DOWNGRADE MODE
ENABLE ADDRESS VERSION
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V2 false 0.0.0.0 enable disable
V3 false 0.0.0.0 enable disable
V4 true 192.0.2.1 enable disable
V200 false 0.0.0.0 enable disable
4 out of 4 entries displayed