Mailinglist Archive: opensuse-ha (2 mails)

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[opensuse-ha] multicast problems with cluster of KVM guests
Hi All,

I spent quite some time last week bashing my head against a weird
multicast problem. I have openSUSE 12.3 on my desktop, running a
cluster of openSUSE 13.1 beta VMs, configured for multicast. After a
while one then the other node would start spewing "corosync [TOTEM]
Retransmit List: ..." to syslog, and the cluster would break. This
seems to be the same issue discussed here:

If anyone else hits this problem, you can work around it by running the
following command on the host:

# echo 1 > /sys/class/net/virbr0/bridge/multicast_querier

Substitute your bride interface name for "virbr0" as appropriate.
Alternately, configure the cluster to use udpu instead of multicast.

I've also added this to the wiki page at


Tim Serong
Senior Clustering Engineer
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