Re: Linux TCP problem while talking to hostme.bkbits.net ?

From: Roger Gammans (roger@computer-surgery.co.uk)
Date: Tue Aug 13 2002 - 07:31:59 EST

On Tue, Aug 13, 2002 at 11:40:08AM +0300, Meelis Roos wrote:
> > The problem is that checksum in tcpdump is OK.
> > This smells really bad.
> >
> > I feel you have to hunt where exactly the segment is dropped
> > and TCPInErrs is incremented.
>
> Things got stranger. The symptoms started to appear on other connections
> [....]
> I did a reboot with the same kernel (2.4.19+bk of some
> state, 4. Aug probably) and it just started to work with the same kernel
> image.

I've seen these sort of symptoms before and it turned out
to be faulty memory.

Back in 2.2 I had a box which picked the behavior up if
you did a ifconfig down/ifconfig up after it had been running
for some time.

tcpdump on the localbox it that case showed Ok (outgoing) packets, but
another box on the same network segment showed the same packets as
corrupted.

Changing the RAM cured it completely.

TTFN 

-- 
Roger.
Master of Peng Shui.  (Ancient oriental art of Penguin Arranging)
GPG Key FPR: CFF1 F383 F854 4E6A 918D  5CFF A90D E73B 88DE 0B3E
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