A monitoring profile allows you to specify the threshold number
of heartbeats to determine whether the IP address is reachable.
When the monitored IP address is unreachable, you can either disable
the PBF rule or specify a
fail-over or
wait-recover action.
Disabling the PBF rule allows the virtual router to take over the
routing decisions. When the fail-over or wait-recover action is
taken, the monitoring profile continues to monitor whether the target
IP address is reachable, and when it comes back up, the firewall
reverts back to using the original route.