no 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-leaveshutdownDell(conf-if-vl-100)#Disabling Multicast FloodingIf the switch receives a multicast packet that has an IP address of a group it has not learned (unregistered frame), the switch floods thatpacket out of all ports on the VLAN.When you configure the no ip igmp snooping flood command, the system drops the packets immediately. The system does notforward the frames on mrouter ports, even if they are present. Disable Layer 3 multicast (no ip multicast-routing) in order todisable multicast flooding.• Configure the switch to only forward unregistered packets to ports on a VLAN that are connected to mrouter ports.CONFIGURATION modeno ip igmp snooping floodSpecifying a Port as Connected to a Multicast RouterTo statically specify or view a port in a VLAN, use the following commands.Internet Group Management Protocol (IGMP) 345
