FAILED failover: Virtual servers were disabled on standby unit.

With this new information thanks to you, I just now compared the test pool screenshot from the down time, to today's live and running LB_1 standby network map to compare that testing pool which was reporting online during the incident.

During down time, both test nodes are shown green. Today, one has the red diamond and the notice of failed time is 2017/06/13. This status is the same in F5_2 and F5_1.

This is the correct status, for the second node in that pool is down, and not online.

This makes me all the more unable to trust the report during down time of both nodes in the testing pool being online.

I may never know what caused this inconsistent monitoring and reports.