Layer 3 Routing Commands 1426Default ConfigurationDisabled is the default state.Command ModeInterface VLAN Configuration modeUser GuidelinesIGMP is enabled when ip pim sparse-mode, ip pim dense-mode, ip dvmrp,or ip igmp-proxy are enabled.A multicast routing protocol (e.g. PIM) should be enabled whenever IGMP isenabled.L3 IP multicast must be enabled for IGMP to operate.ExampleThe following example globally enables IGMP the IGMP proxy service onVLAN 1.console(config)#ip multicast-routingconsole(config)#interface vlan 1console(config-if-vlan1)#ip igmp mroute-proxyip igmp query-intervalUse the ip igmp query-interval command in Interface Configuration mode toconfigure the query interval for the specified interface. The query intervaldetermines how fast IGMP Host-Query packets are transmitted on thisinterface.Syntaxip igmp query-interval secondsno ip igmp query-interval• seconds — Query interval. (Range: 1-3600)Default ConfigurationThe default query interval value is 125 seconds.
