I have two asa 5510 configured for active/standby failover. they are configured properly and there is no error in the log.
When i test the failover by shuting down the primary, the standby unit detects it and takes over as a primary role.
everything I see on the console indicates it is working and show failover shows no error.
but when i try to ping the standby unit or connect to ASDM of the standby unit, i can't get to it. if I run no failover active on the standby unit, the primary become active but i can't get ping it or connect to ASDM although show failover indicates it is. only way to restore it is to shut down the standby then the reload the primary one, then it can connect to the primary unit again and failover status shows as if it's normal.
i tried to clear all of failover configuration and reconfigure them to no avail. i compare two devices configuration and they are identical except for failover LAN ip address.
It is very bizarre. i am reaching out to the collective wisdom of this community. please help!