From owner-freebsd-ipfw@FreeBSD.ORG Tue Jul 28 06:44:35 2009 Return-Path: Delivered-To: freebsd-ipfw@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 4A74A1065670 for ; Tue, 28 Jul 2009 06:44:35 +0000 (UTC) (envelope-from j.m.sandford@hotmail.co.uk) Received: from col0-omc4-s19.col0.hotmail.com (col0-omc4-s19.col0.hotmail.com [65.55.34.221]) by mx1.freebsd.org (Postfix) with ESMTP id 27E008FC0A for ; Tue, 28 Jul 2009 06:44:35 +0000 (UTC) (envelope-from j.m.sandford@hotmail.co.uk) Received: from COL110-W15 ([65.55.34.199]) by col0-omc4-s19.col0.hotmail.com with Microsoft SMTPSVC(6.0.3790.3959); Mon, 27 Jul 2009 23:44:35 -0700 Message-ID: X-Originating-IP: [192.165.213.18] From: Mark Sandford To: Date: Tue, 28 Jul 2009 07:44:34 +0100 Importance: Normal In-Reply-To: <4A6E990E.6090800@elischer.org> References: <4A6E990E.6090800@elischer.org> MIME-Version: 1.0 X-OriginalArrivalTime: 28 Jul 2009 06:44:35.0170 (UTC) FILETIME=[DEB43C20:01CA0F4E] Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-ipfw@freebsd.org Subject: RE: Using dummynet to restrict bandwidth with more than 2 active pipes / queues X-BeenThere: freebsd-ipfw@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: IPFW Technical Discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 28 Jul 2009 06:44:35 -0000 It's a home grown tool using libnet. We've re-tested using one packet generation process to create 4 flows going= across the four pipes and see pretty much what we were expecting. In this case we were just firing 1000 byte udp packets (1042 bytes on the w= ire). ~~~~~~~~~~~~~~~~~~~~~~~~ Mark Sandford email: j.m.sandford@hotmail.co.uk mob: 07990 565976 ~~~~~~~~~~~~~~~~~~~~~~~~ > Date: Mon=2C 27 Jul 2009 23:22:06 -0700 > From: julian@elischer.org > To: j.m.sandford@hotmail.co.uk > CC: freebsd-ipfw@freebsd.org > Subject: Re: Using dummynet to restrict bandwidth with more than 2 active= pipes / queues >=20 > Mark Sandford wrote: > > Sorry if anyone's wasted time looking at this. The problem appears > > to be with the traffic generator. Once we get above two generation > > processes we think that the data is being sent in bursts so although > > it appears to be right averaged over a second at a finer granularity > > the burstiness is meaning it's either exceeding the bandwidth or idle > > at each point. > >=20 >=20 > what are you using to generate traffic? > and what kind of traffic? >=20 > _______________________________________________ > freebsd-ipfw@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-ipfw > To unsubscribe=2C send any mail to "freebsd-ipfw-unsubscribe@freebsd.org" _________________________________________________________________ Celebrate a decade of Messenger with free winks=2C emoticons=2C display pic= s=2C and more. http://clk.atdmt.com/UKM/go/157562755/direct/01/=