1304. Use the display current-configuration interface command to verify that no ACL rule has beenconfigured to restrict the host from joining the multicast group G. If the host is restricted fromjoining the multicast group G, the ACL rule must be modified to allow receiving the reports for themulticast group G.Inconsistent memberships on routers on the same subnetSymptomDifferent memberships are maintained on different IGMP routers on the same subnet.Analysis• A router running IGMP maintains multiple parameters for each interface, and these parametersinfluence one another, forming very complicated relationships. Inconsistent IGMP interfaceparameter configurations for routers on the same subnet will surely result in inconsistency ofmemberships.• In addition, although an IGMP router is compatible with a host that is running a different version ofIGMP, all routers on the same subnet must run the same version of IGMP. Inconsistent IGMP versionsrunning on routers on the same subnet also leads to inconsistency of IGMP memberships.Solution1. Use the display current-configuration command to verify the IGMP configuration information onthe interfaces.2. Use the display igmp interface command on all routers on the same subnet to verify theIGMP-related timer settings. The settings should be consistent on all the routers.3. Use the display igmp interface command to verify that all the routers on the same subnet arerunning the same version of IGMP.
