[60] in linux-net channel archive
Re: UDP: bad checksum - Warnings
daemon@ATHENA.MIT.EDU (Arnt Gulbrandsen)
Mon Feb 6 14:07:31 1995
Date: Mon, 6 Feb 1995 18:48:45 +0100
From: Arnt Gulbrandsen <agulbra@nvg.unit.no>
To: linux-net@vger.rutgers.edu
Cc: "Ralf Flaxa (Inf4-Hiwi - Turowski)" <rfflaxa@immd4.informatik.uni-erlangen.de>
>I noticed in my /var/adm/messages logfile a lot of UDP: bad checksum warnings.
>Here are some of them:
<deletia>
>A. May be it's a problem due to my hardware (NoName NE2000 Ethercard)
Possible, but then you should see as many TCP errors... if the TCP
code prints that message, of course.
>B. May be it's a local network problem (large heterogenous campus network,
> a real testing environment ;-) )
If it's bridged, and the bridges regenerate the ethernet CRC rather
than copy it, that is very likely.
>C. May be it's a load problem (but normally just 1 or 2 users logged in)
Also possible, but not likely. Linux has a bug which may result in
a bad udp checksums once in a month of sundays; I've submitted a fix
which goes into 1.3.
--Arnt
