Internet Group Management Protocol | 409Figure 19-6. Viewing IGMP-enabled InterfacesSelecting an IGMP VersionFTOS enables IGMP version 2 by default, which supports version 1 and 2 hosts, but is not compatible withversion 3 on the same subnet. If hosts require IGMP version 3, you can switch to IGMP version 3 using thecommand ip igmp version from INTERFACE mode, as shown in Figure 19-7.Figure 19-7. Selecting an IGMP VersionViewing IGMP GroupsView both learned and statically configured IGMP groups using the command show ip igmp groups fromEXEC Privilege mode.FTOS#show ip igmp interface gig 7/16GigabitEthernet 7/16 is up, line protocol is upInternet address is 10.87.3.2/24IGMP is enabled on interfaceIGMP query interval is 60 secondsIGMP querier timeout is 300 secondsIGMP max query response time is 10 secondsLast member query response interval is 199 msIGMP activity: 0 joins, 0 leavesIGMP querying router is 10.87.3.2 (this system)IGMP version is 2FTOS#FTOS(conf-if-gi-1/13)#ip igmp version 3FTOS(conf-if-gi-1/13)#do show ip igmp interfaceGigabitEthernet 1/13 is up, line protocol is downInbound IGMP access group is not setInterface IGMP group join rate limit is not setInternet address is 1.1.1.1/24IGMP is enabled on interfaceIGMP query interval is 60 secondsIGMP querier timeout is 125 secondsIGMP max query response time is 10 secondsIGMP last member query response interval is 1000 msIGMP immediate-leave is disabledIGMP activity: 0 joins, 0 leaves, 0 channel joins, 0 channel leavesIGMP querying router is 1.1.1.1 (this system)IGMP version is 3FTOS(conf-if-gi-1/13)#
