On Wed, 2014-11-12 at 11:12 -0500, m.roth at 5-cent.us wrote: > John Horne wrote: > >> > > They are both virtual servers - so no UPS. Failover communication is > > over the network. > > Um, bingo: are the host systems on UPS's? What happens on the *host* > systems at 03:56? They don't, perhaps, take snapshots of the guests then? > No, no snapshots are taken. As said this is a spurious event which has happened at 03:56 for the past two nights. However, we ran for a few days before then with no problems. Before that it happened at something like 5AM. It does not happen every night, nor at the same time (usually). I have set up a couple of cronjobs to check ifconfig and ping the interface every few seconds. I also have a job that will monitor the main interface for VRRP traffic since that should show what the priority value is when a server claims to have received a higher priority from another server. John. -- John Horne Tel: +44 (0)1752 587287 Plymouth University, UK