Hi David & others,
OK good, so this is not a Linux problem.
One extra datapoint anyway: it happens on my 2.2.12 laptop too,
so it wasn't 2.2.14 specific anyway !
Greetings,
Rob van Nieuwkerk
David S. Miller wrote:
>
> From: Rob van Nieuwkerk <robn@verdi.et.tudelft.nl>
> Date: Wed, 5 Jan 2000 21:41:05 +0100 (CET)
>
> It's very easy (on my machine) to reproduce: just visit the FTP
> site with netscape and do some cd or read a file.
>
> Easy to reproduce here as well, I believe it is the applix machine's
> fault, watch:
>
> < applix100.ftp > pizda.32908: P 2633:2685(52) ack 1224 win 8760
>
> Applix says "Here is data up to and including 2685"
>
> > pizda.32908 > applix100.ftp: . 1224:1224(0) ack 2685 win 32696 (DF)
>
> Linux says "Ok, I got up to and including 2685"
>
> > pizda.32908 > applix100.ftp: P 1224:1280(56) ack 2685 win 32696 (DF)
>
> Linux says "Here is data up to and including 1280"
>
> < applix100.ftp > pizda.32908: . 2679:2679(0) ack 1224 win 8760 (DF)
>
> Applix says "I didn't get that"
>
> BUT also note how Applix has decreased it's sequence numbers to before
> the data Applix sent before, this is completely illegal, you cannot
> take back what you've already sent to the other end and the other end
> has acknowledged.
>
> I note in passing that this machine is a Solaris system. But it is
> also possible that some load balancing "black box" is at work here,
> I've seen in the past cases where such devices mess with TCP headers
> and cause no end of headaches for properly functioning TCP
> implementations (the worst on record is hotmail.com).
>
> Later,
> David S. Miller
> davem@redhat.com
>
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