Submit a ticketCall us

Get a crash course on Network Monitoring delivered right to your inbox
This free 7-day email course provides a primer to the philosophy, theory, and fundamental concepts involved in IT monitoring. Lessons will explain not only how to perform various monitoring tasks, but why and when you should use them. Sign up now.

Home > Success Center > Network Performance Monitor (NPM) > SNMPv3 monitored nodes are displayed as Unknown

SNMPv3 monitored nodes are displayed as Unknown

Table of contents
Created by Interspire Import, last modified by Eric Bryant on Jul 14, 2017

Views: 233 Votes: 0 Revisions: 10


SNMPv3 monitored nodes are displayed as Unknown.


Monitored nodes are displayed as Unknown because NPM's store index is broken after modifications are made. Modifications, like device changes, rebooting the device, and physical and modifications, such as blade swaps, all cause these objects to be Unknown.


  1. Ensure the Interface Index Persistence is enabled on the device sid for the interface(s) in question so that the interface indexes are not re-mapped. For more information contact vendor of device.
  2. To re-establish links to the indexes, click Web Console > Settings > Sonar Network Discovery
  3. If the issue still persist, select the Unknown interfaces, and then click Delete.
  4. To obtain the current indexes, click Web Console > Settings > Manage Nodes > List Resources.


Last modified
13:12, 14 Jul 2017