Configuring Layer 2 Multicast Configuration Examples
Configuration Guide  
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Figure 7-17 Configure IGMP Snooping on Ports
5)  Click   to save the settings.
7.3.4  Using the CLI
1)  Enable IGMP Snooping and MLD Snooping globally.
Switch#configure
Switch(config)#ip igmp snooping
Switch(config)#ipv6 mld snooping
2)  Configure Unknown Multicast Groups as Discard globally.
Switch(config)#ip igmp snooping drop-unknown
3)  Enable IGMP Snooping on port 1/0/2 and enable Fast Leave. On port 1/0/4, enable IGMP 
Snooping.
Switch(config)#interface fastEthernet 1/0/2
Switch(config-if)#ip igmp snooping
Switch(config-if)#ip igmp snooping immediate-leave
Switch(config-if)#exit
Switch(config)#interface fastEthernet 1/0/4
Switch(config-if)#ip igmp snooping
Switch(config-if)#exit
4)  Enable IGMP Snooping in VLAN 10.
Switch(config)#ip igmp snooping vlan-config 10