From owner-freebsd-net@FreeBSD.ORG Tue Feb 10 00:56:54 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 6A53016A4CE for ; Tue, 10 Feb 2004 00:56:54 -0800 (PST) Received: from pd3mo1so.prod.shaw.ca (shawidc-mo1.cg.shawcable.net [24.71.223.10]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5ED9D43D1D for ; Tue, 10 Feb 2004 00:56:54 -0800 (PST) (envelope-from colin.percival@wadham.ox.ac.uk) Received: from pd4mr1so.prod.shaw.ca (pd4mr1so-qfe3.prod.shaw.ca [10.0.141.212]) by l-daemon (iPlanet Messaging Server 5.2 HotFix 1.18 (built Jul 28 2003)) with ESMTP id <0HSV000L921UE5@l-daemon> for freebsd-net@freebsd.org; Tue, 10 Feb 2004 01:53:54 -0700 (MST) Received: from pn2ml1so.prod.shaw.ca (pn2ml1so-qfe0.prod.shaw.ca [10.0.121.145]) by l-daemon (iPlanet Messaging Server 5.2 HotFix 1.18 (built Jul 28 2003)) with ESMTP id <0HSV00F1921UKE@l-daemon> for freebsd-net@freebsd.org; Tue, 10 Feb 2004 01:53:55 -0700 (MST) Received: from piii600.wadham.ox.ac.uk ([24.87.233.42]) by l-daemon (iPlanet Messaging Server 5.2 HotFix 1.18 (built Jul 28 2003)) with ESMTP id <0HSV0063721S70@l-daemon> for freebsd-net@freebsd.org; Tue, 10 Feb 2004 01:53:54 -0700 (MST) Date: Tue, 10 Feb 2004 08:53:19 +0000 From: Colin Percival In-reply-to: X-Sender: cperciva@imap.sfu.ca (Unverified) To: Danny Braniss Message-id: <6.0.1.1.1.20040210084851.03805a78@imap.sfu.ca> MIME-version: 1.0 X-Mailer: QUALCOMM Windows Eudora Version 6.0.1.1 Content-type: text/plain; charset=us-ascii; format=flowed Content-transfer-encoding: 7BIT References: cc: freebsd-net@freebsd.org Subject: Re: TTCP/RFC1644 problem 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: Tue, 10 Feb 2004 08:56:54 -0000 At 08:32 10/02/2004, you wrote: >with sysctl net.inet.tcp.rfc1644 = 0, the transaction uses only 6 packets >and it's less than 1 sec, setting net.inet.tcp.rfc1644 to 1 uses >8 packets and takes more than 1 sec. > >with net.inet.tcp.rfc1644 = 1: > No. Time Source Destination Protocol Info > 1 > 0.000000 132.65.80.32 132.65.16.103 TCP 4108 > > 255 [FIN, SYN, PSH] Seq=967743282 Ack=0 Win=57600 Len=25 132.65.80.32 -> 132.65.16.103: "I'm trying to use TTCP. Here's my request." > 2 > 0.000036 132.65.16.103 132.65.80.32 TCP 255 > >4108 [SYN, ACK] Seq=99082279 Ack=967743283 Win=57344 Len=0 132.65.16.103 -> 132.65.80.32: "Uh, hello. I don't know what TTCP is, could you try saying something I understand?" Whereupon 132.65.80.32 reverts to normal behaviour, and uses the same 6 packets as it would if TTCP were disabled. Colin Percival