From owner-freebsd-net@FreeBSD.ORG Sat Sep 18 01:15:01 2004 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 125AC16A4CE for ; Sat, 18 Sep 2004 01:15:01 +0000 (GMT) Received: from c00l3r.networx.ch (c00l3r.networx.ch [62.48.2.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4C00F43D2F for ; Sat, 18 Sep 2004 01:15:00 +0000 (GMT) (envelope-from andre@freebsd.org) Received: (qmail 21523 invoked from network); 18 Sep 2004 01:09:48 -0000 Received: from unknown (HELO freebsd.org) ([62.48.0.54]) (envelope-sender ) by c00l3r.networx.ch (qmail-ldap-1.03) with SMTP for ; 18 Sep 2004 01:09:48 -0000 Message-ID: <414B8C1B.2E7C971C@freebsd.org> Date: Sat, 18 Sep 2004 03:15:07 +0200 From: Andre Oppermann X-Mailer: Mozilla 4.8 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: "Raphael H. Becker" References: <20040917104356.E55054@p-i-n.com> <414ADD15.FAC42CDB@freebsd.org> <20040917231922.G55054@p-i-n.com> <414B567C.9060904@freebsd.org> <414B5777.1030901@freebsd.org> <20040918000303.J55054@p-i-n.com> <414B6F11.5070902@freebsd.org> <20040918013929.O55054@p-i-n.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit cc: freebsd-net@freebsd.org cc: freebsd-current@freebsd.org Subject: Re: Strange things on GBit / 1000->100 / net.inet.tcp.inflight.* X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 18 Sep 2004 01:15:01 -0000 "Raphael H. Becker" wrote: > > On Sat, Sep 18, 2004 at 01:11:13AM +0200, Andre Oppermann wrote: > > I'm unable to reproduce your problem. > > > > Usually in these cases there is an ethernet duplex mismatch somewhere. > > Can set the network cards and the switches to fixed 1000 or 100 full-duplex? > > Yes, one of my first tests. Both machines fixed to their nominal > transfer rate. Tested different ports, different irons (source and > target), different cables. Always same result. > > All channels are able to do their maximum speed. Ok. > Changing target and source (100 -> 1000) resulted in >10MBytes/sec, same > machines, same cables, same everything 1000 -> 100 resulted in what we > discuss here (300kBytes). > > 100->100 (between the two PE350) is working fine, too. > > The problematic case (1000 -> 100) was tested with 3 machines 5.x and 2 > machines 4.x, all cases the same. Hmmm... > I'm not sure this is a "physical" problem. The high number of out-of-order packets on your 4.10 machine is very suspicious. > I will try something else next days: > * New cables > * FreesBIE with 4.10 on the 5.3-Boxes, ftp'in /dev/zero directly to /dev/null ... > * throtteling 1000MBit ... maybe > > Maybe: > * another GBit-Switch (if available) That would be nice. Try to get some other brand or model than the one you have now. > Workaround: > * Buy 1000MBit-Cards for the both "Router"-boxes Why that? Do you have to do TCP transfer to/from these machines? Yet another test you could try: 5.3 GE ---> FE 4.10 "Router" FE ---> 4.10 FE -- Andre