HP 6125G HP 6125G & 6125G/XG Blade Switches IP Multicast Configuration - Page 112
Inconsistent memberships on routers on the same subnet, Symptom, Analysis, Solution
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Inconsistent memberships on routers on the same subnet Symptom Different memberships are maintained on different IGMP routers on the same subnet. Analysis • A router running IGMP maintains multiple parameters for each interface, and these parameters influence one another, forming very complicated relationships. Inconsistent IGMP interface parameter configurations for routers on the same subnet will surely result in inconsistency of memberships. • In addition, although an IGMP router is compatible with a host that is running a different version of IGMP, all routers on the same subnet must run the same version of IGMP. Inconsistent IGMP versions running on routers on the same subnet also leads to inconsistency of IGMP memberships. Solution 1. Use the display current-configuration command to verify the IGMP configuration information on the interfaces. 2. Use the display igmp interface command on all routers on the same subnet to verify the IGMP-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 are running the same version of IGMP. 101
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