From owner-freebsd-bugs Fri Apr 13 7:49:54 2001 Delivered-To: freebsd-bugs@freebsd.org Received: from filk.iinet.net.au (syncopation-dns.iinet.net.au [203.59.24.29]) by hub.freebsd.org (Postfix) with SMTP id 85B7E37B423 for ; Fri, 13 Apr 2001 07:49:49 -0700 (PDT) (envelope-from julian@elischer.org) Received: (qmail 16640 invoked by uid 666); 13 Apr 2001 14:52:22 -0000 Received: from i188-164.nv.iinet.net.au (HELO elischer.org) (203.59.188.164) by mail.m.iinet.net.au with SMTP; 13 Apr 2001 14:52:22 -0000 Message-ID: <3AD711EE.EEADD293@elischer.org> Date: Fri, 13 Apr 2001 07:49:18 -0700 From: Julian Elischer X-Mailer: Mozilla 4.7 [en] (X11; U; FreeBSD 5.0-CURRENT i386) X-Accept-Language: en, hu MIME-Version: 1.0 To: Toni SOUEID Cc: freebsd-bugs@freebsd.org, freebsd-net@freebsd.org Subject: Re: Problem in TCP initialisation of cwnd References: <000901c0c422$bd356860$941f7ec2@hamster> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-bugs@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Toni SOUEID wrote: > > Hello, > My name is Toni Soueid and I'm currently working on a project > in which I have to analyse the behavior of FreeBSD TCP. > > I'm running FreeBSD 4.2-STABLE (which I got from a Magazine CD), > and I'm analysing the TCP with various tools. > > One thing that shocked me is that a TCP connection in FreeBSD (at least on > my machines) > doesn't begin with a slow start but rather sends a huge amount of packets to > the other end > (this huge amount only seems to be limited either by the receiver window or > by the local machine's > send buffer). It seems that cwnd isn't initialised. It is my understanding that it does this only if the destination is considered 'local' (i.e in the same subnet.) -- __--_|\ Julian Elischer / \ julian@elischer.org ( OZ ) World tour 2000-2001 ---> X_.---._/ v To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message