SNMPv3 traps not being processed in DX NetOps Spectrum

Products

• Spectrum
• Network Observability

Issue/Introduction

SNMP traps from several devices are not being received or shown in Spectrum and hence no alarms are being raised for them. 

Environment

DX NetOps Spectrum 23.3.x or later

Cause

Checking the SNMPv3 profiles, if there are more than the one with the same ID name, then this is the cause of the issue:

By default, Spectrum is set to accept only unique v3 User IDs.

Resolution

Tthere is a new setting in 23.3.x in:

$SPECROOT/SS/.vnmrc

The setting is:

unmanaged_trap_proc_multiple_same_username=false

By setting the above to true, Spectrum will be able to process the traps from devices discovered using different v3 profiles with the same ID.