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Home > Success Center > User Device Tracker (UDT) > UDT - Knowledgebase Articles > Verify Layer 3 polling in UDT

Verify Layer 3 polling in UDT

Created by Eric Bryant, last modified by Nigel on Sep 10, 2018

Views: 2,203 Votes: 3 Revisions: 7


This article describes how to check for Layer 3 polling and whether devices are added to UDT. 

Case use is if IP information missing from endpoints in UDT.


All UDT versions


Check to see if Layer 3 devices are added into UDT

  1. Go to Settings > All Settings > UDT Settings > Manage Ports.
  2. Select Nodes from the Show menu. 
  3. If nodes do not appear, add them to UDT. Refer to Adding Orion Nodes to UDT.

Check for if Layer 3 polling is enabled

  1. Go to Settings > Manage Nodes.
  2. Select the required node.
  3. Click Edit Properties.
  4. Scroll down to UDT Node Properties, and verify that Layer 3 polling is selected.

Troubleshoot Layer 3 data

If Layer 3 data (IP Addresses) are not displayed in UDT, verify the following:

  • The device supports all OIDs.
  • The Layer 3 job exists for the node (Settings > All Settings > UDT Settings > View UDT Job Status).
  • The output of UDT Compatibility Checker (Layer 3 target). Try all versions of SNMP protocol – if one of them succeeds, consider changing the device configuration.
  • Verify in the UDT.Jobs log that the job completes successfully,  verify the job duration, and adjust timeout if necessary on the Settings > All Settings > UDT Settings > Advanced Settings page.
  • Verify in the UDT.BusinessLayer log that the job's results are processed successfully
  • Connect to the device and verify the ARP table.

If you are finding that the Layer 3 polling option itself is being unchecked, see Layer 3 polling disable in UDT for more information.


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