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:

https://bugzilla.redhat.com/show_bug.cgi?id=880035

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
http://en.opensuse.org/openSUSE:High_Availability

Regards,

Tim
--
Tim Serong
Senior Clustering Engineer
SUSE
tserong@xxxxxxxx
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