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IGMP Reports/Leaves sent by the hosts do not reach the Mrouter
Ensure that the primary or secondary Mrouter is reachable. If not, the IGMP
Reports/Leaves are not forwarded. Note that the Mrouter may not be
reachable immediately after a LAG failover/failback.
RS G8264(config)# show ip igmp groups
Ensure the host's multicast application is started and is sending correct IGMP
Reports/Leaves.
RS G8264(config)# show ip igmp groups
RS G8264(config)# show ip igmp counters
The Mrouter is reachable on the incorrect LAG
Check link state. LAG 1 may be down or in STP discarding state.
Check STP convergence and port VLAN membership.
Check IP connectivity between the switch and the configured Mrouter
(primary or secondary).
Hosts receive multicast traffic at a lower rate than normal
Ensure a multicast threshold is not configured on the LAGs.
RS G8264(config)# interface port <port id>
RS G8264(configif)# no stormcontrol multicast
Check link speeds and network congestion.
Chapter 32: Internet Group Management Protocol
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