[K12OSN] UDP checksum error

[Stephen Smoogen]

On Sat, 14 Aug 2004, Eric Harrison wrote:

>On Sat, 14 Aug 2004, Stéphane Couture wrote:
>
>>The rom image starts correctly, driver is loaded and dhcp server is
>>detected.  It start loading the kernel (Loading
>>192.168.0.254:/lts/vmlinux.ltsp)  and then  I get this error message:
>>
>>UDP checksum error.
>>
>>Sometimes I get it 5-6 times, and the client freeze.  Sometime, I get
>>it  2 times and the boot process continue (and finish with a nfs
>>problem, but that's another thing) and sometime, I don't get this error,
>>and the boot process continue. 
>>
>>I remade my flopppy, change my ethernet card for another one (of same
>>type), even change my computer and use the same card and still get the
>>same problem. 
>>
>>
>>Does anybody would have an idea where I am bad?
>
>The first thing I tend to do with old hardware is to tear it apart,
>blow out all the dust, and put it back together.
>
>If it was then still having the same problem, I would check for bad
>ram. Memtest86 is the standard here:
>
>	http://www.memtest86.com/

The areas I have also seen UDP checksum errors are:
1) Dirty nic connections.
2) Hub network with too many collisions
3) Duplex problems (where a card thinks its Full Duplex and the 
   Hub/Switch thinks its half)


-- 
Stephen John Smoogen		smoogen at lanl.gov
Los Alamos National Lab  CCN-5 Sched 5/40  PH: 4-0645
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