Hi, we lost all load balancing across all farms on our Zen Loadbalancer 
at 19:25 tonight. The /var/log/messages had 3 identical entries :-

Dec  2 19:24:39 zendlb ucarp[1802]: [WARNING] Non-preferred master 
advertising : reasserting control of VIP with another gratuitous arp

I tried restarting the farms but made no difference. Rebooted and came 
back ok. We have a cluster but that only took over during the reboot and 
then switched back as configured to do so. It is running on Vmware 
vSphere so will check the logs tomorrow to see if was auto migrated.

Any ideas what would cause this?

Thanks, John.

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