SNMPv3 traps are 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 no alarms are being raised for them. 

Cause

Review the SNMPv3 profiles by navigating to the Discovery window or in Topology - New Model by IP window.  If you have more than one SNMPv3 profile with the same User ID name, then the SpectroSERVER may ignore the traps:

 

Resolution

In NetOps Spectrum 23.3 there was a new setting in the $SPECROOT/SS/.vnmrc file to prevent the processing of traps on devices that were not actually modeled in Spectrum:

unmanaged_trap_proc_multiple_same_username=false

If a device was not modeled in Spectrum the traps would not show on the VNM if there were multiple profiles with the same username.  This was done to limit the amount of processing needed to be done by the SS.

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

In an environment where Trap Based Discovery is enabled this setting needs to be true.

In an environment where Trap Director is used this setting is set to true on Trap Director enabled SpectroSERVERs and this is false on the non Trap Director enabled landscapes.

 

Additional Information

If you do not have this entry "unmanaged_trap_proc_multiple_same_username=" in your $SPECROOT/SS/.vnmrc file then the value is true by default.  There was a change in NetOps 24.x and above to set this to true.