Inconsistent Memberships On Routers On The Same Subnet - H3C S7500E Series Operation Manual

Operation Manual – Multicast
H3C S7500E Series Ethernet Switches

4.7.2 Inconsistent Memberships on Routers on the Same Subnet

I. Symptom
Different memberships are maintained on different IGMP routers on the same subnet.
II. 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 IGMP routers are compatible with hosts, all routers on the
same subnet must run the same version of IGMP. Inconsistent IGMP versions
running on routers on the same subnet will also lead to inconsistency of IGMP
memberships.
III. Solution
1) Check the IGMP configuration. Carry out the display current-configuration
command to view the IGMP configuration information on the interfaces.
2) Carry out the display igmp interface command on all routers on the same subnet
to check the IGMP-related timer settings. Make sure that the settings are
consistent on all the routers.
3) Use the display igmp interface command to check whether the routers are
running the same version of IGMP.
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Chapter 4 IGMP Configuration