OPERATIONAL DEFECT DATABASE
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One of the FTD in HA is active and other unit is rebooting Critical health alert "High availability pair is in split brain" gets triggered on FMC
FTD in HA FTD HA managed by FMC
No workarounds, the alert will get cleared automatically or re-apply heath policy.
When primary FTD became active, it sent an alert (counter = 1) to the FMC. And Secondary did not send any alerts, so FMC retained the counter as 1 (as Secondary was in crash state from 15:46 till 15:51 until it got rebooted) Hence, FMC reported both as active. After a while, secondary FTD came up (say 3?4 minutes) and it got the latest states from the FTD-HAs.
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