echo "0" > /sys/class/net/virbr0/bridge/multicast_snooping
That results in multicast packets are broadcasted to all bridge ports. I
prefer to have igmp querier turned on on a central switch.
I had the impression that the OP used virtual machines on a local
(virtual and private) network. I had such a setup with my first
experiments and experienced (timing) issues with corosync messages until
I turned snooping off.
But you are right, on my production system I have turned on both
multicast_snooping and multicast_querier.
For reference, there was this bugreport that was helpful for me:
https://bugzilla.redhat.com/show_bug.cgi?id=880035
Regards,
Sven
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