i have a problem with Fault Monitoring Device Administration. i have two devices which stuck in learning mode for almost forever. When the job is done the devices report an error SNMP timeout. I run a credential verfication job and the credentials for the devices are correct.
Assuming these are the only four devices using SNMPv3 in LMS, then the engineID is a non-issue. However, if any other device has the same engineID as those two non-working devices, the problem could still be a duped engineID. Debugging with logs is fairly complex. The easiest way to identify the problem is to use a sniffer. Start a sniffer trace filtering on all traffic to one of the failing devices. Then, rediscover the device in Fault Monitoring under Admin > Collection Settings > Fault > Fault Monitoring Device Administration. When it goes to a Questioned state, look at the sniffer trace.
If you see SNMP report packets indicating an error of notInWindow, that points to the duplicate engineID problem. ICMP packets without responses points to problems with ping.