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Re: Let's not count unknown ethertypes as interface errors? (Martin Husemann) writes:

>Several easy solutions:
> - like the comment says: create a special "unknown protocols" counter
>   and use that for this case, leaving the other "goto drop;" in that
>   function still increase ierrors
> - just delete the last line (if_statinc) here - no real error to be seen,
>   just ignore it silentely

We only have one (input) interface error counter, and that counts dropped
packets for many reasons.

So either you need another per-interface counter to distinguish
the reason why things got dropped, probably too much of a change,
or keep the single counter for all reasons.

I would add a global counter and/or a histogram to report "unknown protocols"
(or all protocols).

                                Michael van Elst
                                "A potential Snark may lurk in every tree."

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