*BSD News Article 7692


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Newsgroups: comp.unix.bsd
Path: sserve!manuel.anu.edu.au!munnari.oz.au!spool.mu.edu!uwm.edu!rpi!psinntp!psinntp!cubtosys!ns!mischler
From: mischler@jolt.cubic.com (Dave Mischler)
Subject: TCP/IP problem on 386bsd ???
Date: Thu, 12 Nov 92 23:14:21 GMT
Message-ID: <MISCHLER.92Nov12231428@jolt.cubic.com>
Lines: 18
Sender: news@cubic.com
Nntp-Posting-Host: jolt.cubic.com

I am attempting to run an NNTP server on a 386BSD 0.1 system with the
patches from the patch kit.  When I allow the client to pipeline requests
to the server then no progress is made after a while.  Netstat does not
show anything in either the send or receive queue in this case (on either
machine).  The client is running on an SCO system, and works with servers
on other SCO boxes, or on a Sun.  If I don't pipeline requests then everything
works OK.

My initial guess was that the TCP window on the server was too small and
that the client was causing the server to block by not reading the data
returned before the window was filled up, but I can't find any evidence
for this.  I looked and found that TCP_MAXWIN is set to 64K, and this
seems like it should be enough.

Can anybody help out with this?

Dave Mischler
mischler@cubic.com