Every hour devices are generating false Management Agent Lost alarms in Spectrum

Products

• Network Observability

Issue/Introduction

Every hour devices are generating false Management Agent Lost alarms in Spectrum

Environment

Component: Events and Alarms
Version: DX NetOps Spectrum 22.3.4 and below

Cause

Difference in the snmp context name and the value of the cContextMappingVrfName. For example:

Context name ss "default"

cContextMappingVrfName is DEFAULT

Spectrum tries reading using the cContextMappingVrfName "DEFAULT" so the snmp fails causing the MAL alarm. 

Resolution

DX NetOps Spectrum 23.3.5 and above has changes the code to use context name from the OID of cContextMappingVrfName attribute.

From the "Resolved issues 23.3.5" section of the documentation:

Symptom: Spectrum uses the VRF name in place of the context name to query the MIB data.
Resolution: With this fix, Spectrum addresses the issue to ensure that it uses the context name to query the MIB data.