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Cisco Nexus – Why is parameter PTP Username reset to default after element restart?

Solved1.67K views9th September 2020CISCO Nexus protocol
5
Jens Vandewalle [SLC] [DevOps Enabler]9.44K 9th September 2020 0 Comments

I’m running protocol Cisco Nexus version 3.0.0.23 and notice that after an element restart parameter PTP Username (PID 11200) is reset to its default value No Credentials (raw value “-1”).

Following items are checked from my side:

  • Protocol has no after startup logic
  • Parameter contains attribute save=”true”
  • Found no reset-to-default logic in the QActions nor in the trigger-action combinations

Does someone knows why this happens?

Jens Vandewalle [SLC] [DevOps Enabler] Selected answer as best 9th September 2020

2 Answers

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5
Michiel Oda [SLC] [DevOps Enabler]3.61K Posted 9th September 2020 1 Comment

After further investigation we noticed that the element was running protocol Cisco Manager before a change was done to Cisco Nexus.
In the Cisco Manager protocol PID 11200 is the index column of the Detailed Interface Info table. Because of that the database contained multiple entries for PID 11200 while only 1 is expected in protocol Cisco Nexus.

Wouter Demuynck [SLC] [DevOps Advocate] Posted new comment 9th September 2020
Wouter Demuynck [SLC] [DevOps Advocate] commented 9th September 2020

This is one of the reasons why Cube suggests to recreate the element with a new ID when changing the protocol of an element to a different one. Any previously saved data could cause the updated element to misbehave and tracking down the exact reason might be hard.

1
João Severino [SLC] [DevOps Catalyst]13.02K Posted 9th September 2020 3 Comments

Are you setting the username to something valid or is it set to an empty string?

If a parameter is set to an empty string it will revert to the default value defined in the protocol after a restart.

João Santos [SLC] Posted new comment 9th September 2020
Jens Vandewalle [SLC] [DevOps Enabler] commented 9th September 2020

It is set to something valid

João Severino [SLC] [DevOps Catalyst] commented 9th September 2020

Are you testing the element alone or as part of the PTP solution?

João Santos [SLC] commented 9th September 2020

Indeed, as João Severino said, if you are using it as part of the PTP Solution it might be related with that. Just tested on a different setup (no PTP Solution) and it is working as expected. Credentials are being kept.

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