Configuring IGMP SnoopingConfiguring IGMP snooping is a one-step process. To enable, view, or disable IGMP snooping, use thefollowing commands.There is no specific configuration needed for IGMP snooping with virtual link trunking (VLT). Forinformation about VLT configurations, refer to Virtual Link Trunking (VLT).• Enable IGMP snooping on a switch.CONFIGURATION modeip igmp snooping enable• View the configuration.CONFIGURATION modeshow running-config• Disable snooping on a VLAN.INTERFACE VLAN modeno ip igmp snoopingRelated Configuration Tasks• Removing a Group-Port Association• Disabling Multicast Flooding• Specifying a Port as Connected to a Multicast Router• Configuring the Switch as QuerierExample of ip igmp snooping enable CommandDell(conf)#ip igmp snooping enableDell(conf)#do show running-config igmpip igmp snooping enableDell(conf)#Removing a Group-Port AssociationTo configure or view the remove a group-port association feature, use the following commands.• Configure the switch to remove a group-port association after receiving an IGMP Leave message.INTERFACE VLAN modeip igmp fast-leave• View the configuration.INTERFACE VLAN modeshow configExample of Configuration Output After Removing a Group-Port AssociationDell(conf-if-vl-100)#show config!interface Vlan 100no ip addressip igmp snooping fast-leaveInternet Group Management Protocol (IGMP) 363
