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G8264 Application Guide for ENOS 8.4
IGMP Reports/Leaves sent by the hosts do not reach the Mrouter
Ensure IGMP Queries sent by the Mrouter reach the hosts.
Ensure the Mrouter is learned on both switches. Note that the Mrouter may
not be learned on switch B immediately after a LAG failover/failback.
RS G8264# show ip igmp mrouter
Ensure the host's multicast application is started and is sending correct IGMP
Reports/Leaves.
RS G8264# show ip igmp groups
RS G8264# show ip igmp counters
A host receives multicast traffic from the incorrect VLAN
Check port VLAN membership.
Check IGMP Reports sent by the host.
Check multicast data sent by the server.
The Mrouter is learned on the incorrect LAG
Check link state. LAG 1 might be down or in STP discarding state.
Check STP convergence.
Check port VLAN membership.
Hosts receive multicast traffic at a lower rate than normal
Note: This behavior is expected if IPMC flood is disabled and CPU is enabled.
As soon as the IGMP/IPMC entries are installed on ASIC, the IPMC
traffic recovers and is forwarded at line rate. This applies to unregistered
IPMC traffic.
Ensure a storm control 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.