Enabling Test Parameter Rediscovery after an OID change

QUESTION

How do I enable Test Parameter Rediscovery after an OID change.

RESOLUTION

In the case of SNMP tests, some OIDs can change over time and this can cause SNMP tests to become UNKNOWN, indicating that no polled value could be retrieved.

Should you click the "hand" icon on any of the UNKNOWN tests and you see the below error: 

"Invalid SNMP OID - No Such Instance currently exists at this OID"

This is likely indicative of an OID change.

The easiest way to resolve this is to enable test parameter rediscovery on the device with these errors. This will periodically update the tests that are provisioned on the device, and optionally add any new tests, and delete the tests that are no longer valid. 

• Navigate to Administration --> Devices.
• Search for the devices using filters and select via the checkbox to the left hand side of the device.

• Click on the "Pencil" icon in the top right.
• Check the "Test Parameter  Rediscovery" box. 
• Toggle "Enabled"
• Fill in the necessary details as per your requirement.
• Click "Update". 

Note: Test Parameter Rediscovery has a minimum frequency of 12 hours

Please see our recommended rediscovery settings below: 

                   ​

1. Action for New Tests > Log Only
   (This will prevent the re-adding of tests you may have deleted).
2. Action for Updated tests > Update & Log
   (This will automatically update any test that has had the test name changed but with the same OID, or update a test that has the same name as before but who's OID has changed).
3. Action for Deleted Tests > Suspend & Log
   (preferable to "Delete & Log" so you may review the test before deleting or wish to keep the history for that test).

Note: Also select an Application Profile(s) to group certain devices together by test types. The application profile acts as a filter for the test types that Traverse rediscovers. Please see the "Application Profile" section of the user guide for more information. 

The other Actions include: 

• Action For New Tests
  • Add & Log - Adds the new tests to the device(s) and notes the modification in the C:\Program Files (x86)\Traverse\logs\summary\discovery.log.
  • Ignore - Ignores discovered new tests for the device(s).
  • Log Only - Only logs discovered new test information.
• Action For Updated Tests
  • Update & Log - Updates the existing tests executing against the device(s) and notes the modification in the C:\Program Files (x86)\Traverse\logs\summary\discovery.log.
  • Ignore - Ignores discovered updated tests for the device(s).
  • Log Only - Only logs discovered updated test information.
• Action For Deleted Tests
  • Delete & Log - Deletes the test from the device(s) and notes the modification in the C:\Program Files (x86)\Traverse\logs\summary\discovery.log.
  • Ignore - Ignores discovered deleted tests for the device(s).
  • Log Only - Only logs discovered deleted test information.

You can also view the rediscovery log for a specific device by navigating to ADMINISTRATION >> DEVICES >> '3 dots' >> 'View Scan Log'.

For more information on Test Parameter Rediscovery, please see the Test Parameter Rediscovery section of the User Guide referenced below. 

APPLIES TO

All versions of Traverse

REFERENCE

Test Parameter Rediscovery

Application Profile