FMC reports both Primary and Standby FTDs as Failed after upgrade

[rhodrijenkins]

Hello all,

I have just completed an upgrade of an FTD HA pair (2110) to ver 7.2.5. FMC is reporting that both Primary and Secondary HA failed. However, when I log into the cli, show high-availability confis shows Active and Standby Ready.

I can't find any other posts of a similar issue. Any ideas?

[rhodrijenkins]

Update: The secondary is failing to synchronize. If I reboot the standby, it comes up and goes into synchronize state before returning to the failed state.

[tvotna]

Use "show failover history", console output and syslog on both primary and secondary unit during sync stage and after that to troubleshoot.

[rhodrijenkins · Accepted solution]

To fix this, I had to complete the post upgrade deploy operation on the primary, after which I was able to synchronize the secondary with the active FTD.