Date: Sat, 18 Oct 2003 14:46:55 -0400 (EDT) From: Carl Mascott <cmascott@att.net> To: barney@databus.com Cc: freebsd-net@freebsd.org Subject: Re: TCP window size issues Message-ID: <200310181846.h9IIktD2000430@callisto.local> In-Reply-To: <20031018021648.GA26182@pit.databus.com>
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Ahhh, that may explain why, during FTP receive of a large file over a 5 KB/s link with a 56 KB recv window, I get one or two dropped packets at the same point every time, and then no further dropped packets for the rest of the transfer. Barney Wolff wrote: > On Fri, Oct 17, 2003 at 08:16:32PM -0400, Carl Mascott wrote: > > > > NOTE: AFAIK, 4.4BSD through FreeBSD 4.6-R seem to have done > > alright without the PR 11966 patch, but if someone knows > > different, please speak up. > > I'm not really surprised. I would have thought that a well-behaved > sender would be using congestion avoidance and limiting its transmit > window so that packet drops should be rare, even with an oversize > advertised window. What's surprising is that this sort of tweak is > ever required, other than as a minor optimization.
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