Re: tcp connections freezing
Eric Schenk (schenk@cs.toronto.edu)
Sun, 2 Jun 1996 17:49:34 -0400
Brian Pape <bpape@ezl.com> writes:
>I'm having a problem where virtually any program will freeze when it tries
>to receive or send over 1k (1024 bytes) of data. If I try to ftp to (or
>from) the machine, I'll get 1k transferred and the ftp will die. Same
>thing with an irc client, lynx, etc... I haven't been able to get a tcp
>dump program on the machine yet, but in each case, if only a small amount
>of data is transferred at once (again, it seems that 1024 bytes is the
>magic number), things are fine. If the packet size exceeds that, I only
>get 1024 bytes, then the connection freezes. The mtu on my ethernet (3com
>3c509) was 1500, and I found (after a lot of frustration), that changing
>it to 1000 `solves' the problem. I don't know what is really _causing_
>the problem though. I've had this problem running kernels from 1.3.74
>(where it first started) to 1.99.6, although downgrading to 1.3.57 didn't
>fix it (although it worked with that kernel in the first place).
Can you please test 1.99.10 and see if it still exhibits the problem?
The TCP retransmission and timer code has been reworked in this version
and is hopefully more solid.
-- eric
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Eric Schenk www: http://www.cs.toronto.edu/~schenk
Department of Computer Science email: schenk@cs.toronto.edu
University of Toronto