From owner-freebsd-ipfw@FreeBSD.ORG Fri Sep 5 13:28:12 2003 Return-Path: Delivered-To: freebsd-ipfw@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B764B16A4BF for ; Fri, 5 Sep 2003 13:28:12 -0700 (PDT) Received: from fw1.internett.de (fw1.internett.de [195.30.142.24]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3426843FE9 for ; Fri, 5 Sep 2003 13:28:11 -0700 (PDT) (envelope-from michael@nettmail.de) Received: from mx5.internett.de (mx5.internett.de [195.30.142.17]) with ESMTP id h85KS8o26426 for ; Fri, 5 Sep 2003 22:28:08 +0200 Received: (from wwwrun@localhost)id h85KS7R31543 for freebsd-ipfw@freebsd.org; Fri, 5 Sep 2003 22:28:07 +0200 To: freebsd-ipfw@freebsd.org Message-ID: <1062793687.3f58f1d78476d@mx5.internett.de> Date: Fri, 05 Sep 2003 22:28:07 +0200 (CEST) From: michael References: <20030905190041.E059216A4E8@hub.freebsd.org> In-Reply-To: <20030905190041.E059216A4E8@hub.freebsd.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Originating-IP: 80.184.155.144 X-Virus-Scanned: by AMaViS-perl11-milter (http://amavis.org/) Subject: Re: dummynet and modem pipes X-BeenThere: freebsd-ipfw@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: IPFW Technical Discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 05 Sep 2003 20:28:12 -0000 > > when simulating modem pipes using dummynet, how do we simulate the > modem compressions? one way is to pick a compress rate, say 2, and > setup > fake larger bandwidth, but do different traffic (html, jpg, mpg) affect > > the compression latency or compression rate significantly? tia > > -yuchung > Hi, my idea was may a little bit idiotic or stupid may have you probed an ppp-tunnel through 2 Nic's and throug 2 Modempipes on each host. Teh compression can not be directly the sam as Hardware-Compression, may the Compression in the ppp-protocoll should be good to deal with it. may be for test's it's enough accuracy regards michael