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SNMP – negative request IDs result in Timeout

Solved2.05K views18th July 2023requestid SNMP snmp connection Wireshark
1
Thomas Vogel206 1st September 2021 0 Comments

Hi,

I encountered that the request-id of some protocols/elements goes into negative (I assume a integer overflow).
The related device answers with a "normal" positive request-id.
I assume, that the dataminer cannot match this response to the request it send, so the element goes into timeout.

In the past a restart of the element in the dataminer was a possible workaround to reset the ID.
Not sure if it is now not longer possible with the dataminer version (10.1.0.0-10049-CU1) we are using or if it is driver related.

So the question is, how can i prevent the usage of "unnormal" negative request-id's, to get rid of the root problem without a workaround? As I don't write protocols, is the request-id handling specified in the protocol or in the dataminer core software? Where do i need to look for this?

-> get-request

-> get-respond

Best Regards
Thomas

Marieke Goethals [SLC] [DevOps Catalyst] Selected answer as best 18th July 2023

3 Answers

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Ben Vandenberghe [SLC] [DevOps Enabler]9.24K Posted 1st September 2021 0 Comments

I'm not an expert on this, and it seems to be unrelated (as it seems to be the opposite if I understand correctly), but in the past we experienced some problems with equipment from certain vendors that had an SNMP stack with a bug that caused their ID to go negative (which is not in line with the SNMP standard).  I don't recall all the details, but just wanted to mention it here to make sure that this is not related.  I believe we encountered this starting a long time ago with Tandberg products (and they fixed that problem, but I believe then it resurfaced again in new firmware release).  Just in case this could be relevant information.

Ben Vandenberghe [SLC] [DevOps Enabler] Answered question 1st September 2021
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