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Date:      Mon, 13 Jan 1997 23:31:49 +0100
From:      Michael Beckmann <petzi@nacamar.de>
To:        hardware@freebsd.org
Subject:   Re: netstat: input errors
Message-ID:  <v03010d00af00618d8db8@[195.52.251.6]>
In-Reply-To: <v03010d01aef5818552ce@[195.52.251.6]>

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>I see a lot of input errors on my Ethernet interface. What might be the
>cause ?
>
>network:
>Name  Mtu   Network       Address            Ipkts Ierrs    Opkts Oerrs  Coll
>de0   1500  <Link>00.00.c0.27.b5.de       275357767 7383752 344525279    82
>56538965
>
>When I do a netstat -w 1, then it shows no errors for a long time, but
>then, for minutes, it shows these errors, like here:
>
>           input        (Total)           output
>   packets  errs      bytes    packets  errs      bytes colls
>       232   150      35183        197     0      92208    29
>       154    91      25486        123     0      45647     1
>       156    52      56985        143     0     107687     7
>       161    54      47991        190     0     112703     9
>       193   116      35476        140     0      89399    21
>       196    31      27814        217     0     208017     9
>       236   112      42812        224     0     184953    27
>       269    89      33995        282     0     274602    26
>       182   108      25034        117     0      76181     8
>       110    52      17721        103     0      51149     3
>       172    52      38460        182     0     105599    14
>       315    51      87856        378     0     226361    46
>       232   133      33300        215     0      99761    25
>       242    70      70229        302     0     142273    30
>       218   159      25696        126     0      67936    11
>       151    55      33533        143     0      93400     4


I wanted to followup on this. After excluding some possible reasons, like
bad cables, other machines on the net, a beserk hub, I suddenly remembered
I had booted a new kernel some time before I noticed the problems. And the
cause for my problems was this option in my kernel config:

options                "NMBCLUSTERS=1024"

All I did to fix the problem was remove this option, and build a new
kernel. No more input errors ! What seemed to be a hardware problem turned
out to be 100 % software.

Just so noone else stumbles into this :-)

Cheers,

Michael





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