Hi there,
We have 2 FTD 2120 in HA, everything works fine and everything is green but since we have updated our FMCs last week, whenever we try to deploy something by FMC to FTD-HA, the HA on FTDs breaks down, in the logs you can see: (Secondary) Failover interface failed" and the whole deployment failed.
After a few minutes the failover link comes backagain, both FTDs are then in sync and everything is green again, but the Deployment Failed.
We have performed successfully a failover, but again at deployment, we lost a short failover link and deployment failed again.