Symptom
After the SNMP crashes, the local SNMPv3 user created via tacacs+ will no longer be available. The DCNM will reports "Unknown user or password" for this switch.
Conditions
1. SNMPv3 aaa-user
2. SNMP crash
Workaround
Set the aaa-user chache-timeout to 10, and DO NOT use sync the password with "sync-snmp-password ", the snmp aaa-user will be clear due to cache-timeout.
# snmp-server aaa-user cache-timeout 10
You can use the command "show snmp user" to ensure that the aaa-user has been deleted.
And then, use "sync-snmp-password " to sycn the password again.
Further Problem Description
Only seen this issue with SNMP aaa-user.
