This sounds like it might be relevant: https://bugzilla.redhat.com/show_bug.cgi?id=880035 On Mon, Feb 18, 2013 at 5:46 PM, Vladislav Bogdanov <bubble@xxxxxxxxxxxxx> wrote: > Hi all, > > can anyone please confirm that enabling IGMP querier on a switch (stack) > instead of disabling IGMP snooping (thus making switch broadcast all > multicast packets) helps to solve node loss issue? > > I enabled that feature in order to solve packet loss over qemu mcast > tunnels, and that helped dramatically. That tunnels operate very similar > to corosync, where all relevant nodes first join IGMP group, and then > all of them send multicast packets to that group. So in both cases there > is no designated 'sender' or designated 'router port' where all > multicast traffic in a layer-2 broadcast segment originate from. > > So I think it may help to stabilize corosync multicast mode as well. > > May be somebody have hardware-based testing setup with IGMP-snooping > enabled switch(es) and IGMP querier (in cisco terms, different vendors > may call it differently) feature available and can test if this actually > helps? > > Vladislav > _______________________________________________ > discuss mailing list > discuss@xxxxxxxxxxxx > http://lists.corosync.org/mailman/listinfo/discuss _______________________________________________ discuss mailing list discuss@xxxxxxxxxxxx http://lists.corosync.org/mailman/listinfo/discuss
