I am using 2 ACS 4.0 running on Solution Engine linked to 2 Remote Authentication Agents installed on Domain Controllers. When I stop the primary Remote Authentication Agent, I received some "External DB not operational" Authen-Failure-Code before getting first Passed Authentication using backup Remote Authentication Agent.
I am wondering how Remote Authentication Agent is working. What are the keepalive details? Type, Frequency, Max failures, Retry Frequency?