SNMP not working

SNMP not working

AS subject states SNMP is not working.  I have tried both v2 and v3 with v2 have some success.  What I mean is that it polls and discovers sometimes and then it always goes down with an unreachable status.

The add SNMP credentials page is not reachable after the snmp device is created.  The only way to access that page is to go through readding of the device and select "rediscover".  Seems like there should be a way to just list all SNMP credentials.