Are you having notifications like this one from you ASR?
ALERT: Oracle Auto Service Request (ASR) has detected a heartbeat failure for these assets. [list with "Serial"; "Hostnam"; "Information" of affected targets] IMPACT: ASR would not be able to create a Service Request (SR) if a fault were to occur. ACTION: Determine why the heartbeat has failed for these assets and resolve the issue.
This is only a notification saying that ASR not able to reach a target.
For detailed information on how to troubleshoot, you can access MOS Oracle Auto Service Request (ASR) No Heartbeat Issue – How to Resolve (Doc ID 1346328.2)
In general why, things to test are:
– Access from ASR server to transport.oracle.com, via https, using port 443.
– Access from ASR server to ASR assets, via http, using port 6481.