From owner-freebsd-isp Tue Jan 28 15:33:20 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id PAA18734 for isp-outgoing; Tue, 28 Jan 1997 15:33:20 -0800 (PST) Received: from labinfo.iet.unipi.it (labinfo.iet.unipi.it [131.114.9.5]) by freefall.freebsd.org (8.8.5/8.8.5) with SMTP id PAA18716; Tue, 28 Jan 1997 15:33:14 -0800 (PST) Received: from localhost (luigi@localhost) by labinfo.iet.unipi.it (8.6.5/8.6.5) id XAA03832; Tue, 28 Jan 1997 23:51:17 +0100 From: Luigi Rizzo Message-Id: <199701282251.XAA03832@labinfo.iet.unipi.it> Subject: Re: RFC 1323 default settings (was Re: progress report on connection problems) To: danny@panda.hilink.com.au (Daniel O'Callaghan) Date: Tue, 28 Jan 1997 23:51:17 +0100 (MET) Cc: shovey@buffnet.net, robert@nanguo.chalmers.com.au, freebsd-isp@freebsd.org, hackers@freebsd.org In-Reply-To: from "Daniel O'Callaghan" at Jan 29, 97 09:40:02 am X-Mailer: ELM [version 2.4 PL23] Content-Type: text Sender: owner-isp@freebsd.org X-Loop: FreeBSD.org Precedence: bulk > Since RFC 1323 deals with long fat pipes, which very few of us have, it > would make sense to turn the extensions off in the shipped /etc/sysconfig. agreed, although it is sad that such an approach practically bans any TCP extension because some broken equipment won't support it. > Those people who are communicating with TCP between the two ends of a 1.5 > Mbps satellite link, or an intercontinental 45 Mbps link, probably know > who they are and can turn the extensions on. I know that some people in not that it helps much since in many cases the application have hardwired settings for small (<64K) windows. As a matter of fact, has anyone been able to _actually_ make use of >64K windows (i.e. withouth the system changing settings under your feet) ? If yes, which version of FreeBSD ? > 'fatness' of the pipe for RFC 1323 purposes. Local area ATM might be > 'fat' but generally is not 'long' enough to cause the problems with RFC fast ethernet also peaks around 10 KB/ms, which means that going through a couple of (fast) local routers (not switches) might as well bring you close to BW*RTT > 64K Luigi -----------------------------+-------------------------------------- Luigi Rizzo | Dip. di Ingegneria dell'Informazione email: luigi@iet.unipi.it | Universita' di Pisa tel: +39-50-568533 | via Diotisalvi 2, 56126 PISA (Italy) fax: +39-50-568522 | http://www.iet.unipi.it/~luigi/ _____________________________|______________________________________