Date: Fri, 17 Oct 2003 15:46:42 -0700 From: Lev Walkin <vlm@netli.com> To: Carl Mascott <cmascott@att.net> Cc: freebsd-net@freebsd.org Subject: Re: TCP window size issues Message-ID: <3F907152.3080706@netli.com> In-Reply-To: <200310171830.h9HIUnSr000572@callisto.local> References: <200310171830.h9HIUnSr000572@callisto.local>
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Carl Mascott wrote: > I have a few TCP window size issues. [skip] > 3. RFC 793 (TCP) says that shrinking the receive window after > connection is established is "strongly discouraged". I'm > currently shrinking the receive window on my default route > (PPP link) from 32 KB to 4 KB with settings in > /etc/ppp/ppp.conf. (Had to back out patch in PR 11966.) [skip] > How likely am I to get into trouble by shrinking the TCP > receive window? Likely enough that I should make the RFC793 has nothing to do with the defaults you're setting in ppp.conf. RFC merely says that the TCP implementation _itself_ should not shrink window after establishing a TCP connection. If the default dictates 4k, the TCP implementation will use 4k and will not advertise a much smaller window without having accepted that much data. -- Lev Walkin vlm@netli.com
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