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Re: [rare-dev] SNMP sub-interface counter logic in bf_forwarder


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  • From: Alexander Gall <>
  • To: Frédéric LOUI <>
  • Cc: <>
  • Subject: Re: [rare-dev] SNMP sub-interface counter logic in bf_forwarder
  • Date: Thu, 24 Feb 2022 10:10:20 +0100

On Thu, 24 Feb 2022 09:54:00 +0100, Frédéric LOUI <>
said:

> Hi Alex,
> Feel free to apply your fix to bf_forwarder.py and the p4 code.

> The place where subintf counters are processed in bf_forwarde.py should be
> _only_ here:
> https://bitbucket.software.geant.org/projects/RARE/repos/rare/browse/bfrt_python/rare/bf_subifcounter/__init__.py

Maybe it should, but it obviously isn't :( To avoid duplication of
code, I think we'll have to modify the counter modules with an API to
share this code with the SNMP module in a thread-safe manner. Other
suggestions?

--
Alex


> Thanks for this feedback !
> Frederic

>> Le 24 févr. 2022 à 09:26, Alexander Gall <> a écrit :
>>
>> A possible fix would be to index pkt_out_stats with the VLAN ID
>> instead of the source_id (which is always 0). It would be even nicer
>> if we could fix the counter already in the P4 code rather than leaving
>> this to the forwarder. One problem with this is that we have to
>> replicate the counter-fix in multiple places, i.e. the SNMP code and
>> wherever the forwarder pushes the same counter to freerou



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