This article describes the issue when UDT polls Cisco Switches and you receive the following error:
<SNMP-3-AUTHFAIL: Authentication Failure for SNMP >
Disable VRF and Layer 3 polling using the Orion Web Console
Perform the following using SQL commands from the database (NPM 11.5.x only):
Start > All Programs > Solarwinds Orion > Advanced Features > Database Manager > Add Default Server>
Expand the NPM Database (default) NetPerfmon.
Right-click the database name > Select New Query.
Select nodeid from nodesdata where caption name = <NodeCaption>
Where <Node Caption> is the node caption of the node you want to modify.
where <NodeID> is the node id gathered earlier.
where <NodeID> is the node id gathered earlier.