UIM - USM Discovery Wizard unable to discover network devices using SNMP v3

Products

• NIMSOFT PROBES
• DX Infrastructure Management

Issue/Introduction

Running USM Discovery Wizard to discover some network devices (routers) using SNMP V3 but the devices are not getting discovered.

Cause

discovery_agent logs at log level 5 showed the following messages:

May 30 21:21:29:375 [DiscoveryRun, discovery_agent] 2 duplicate SNMPv3 EngineIDs
Note that some duplicates may be the result of the discovery IP scopes including multiple IP addresses for the same device.

This is followed by the EngineID and the ip addresses of the devices that are attempting to use the same engine id.

Environment

Release : 9.2.0

Component : UIM - SNMPCOLLECTOR

Resolution

For SNMP V3 discovery the EngineID's for devices must be unique in the environment.

Duplicate engine id's will result in failure to discover the duplicates using V3

Note: SNMP V2 and V1 will still discover the devices as the EngineID is only used for V3.