From owner-freebsd-net@FreeBSD.ORG Sun Nov 13 23:53:03 2011 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D342C106564A for ; Sun, 13 Nov 2011 23:53:03 +0000 (UTC) (envelope-from weiler@soe.ucsc.edu) Received: from mail-01.cse.ucsc.edu (mail-01.cse.ucsc.edu [128.114.48.32]) by mx1.freebsd.org (Postfix) with ESMTP id C18488FC14 for ; Sun, 13 Nov 2011 23:53:03 +0000 (UTC) Received: from erich-weilers-macbook-pro.local (50-0-69-3.dsl.static.fusionbroadband.com [50.0.69.3]) by mail-01.cse.ucsc.edu (Postfix) with ESMTPSA id 8AA861009C1E; Sun, 13 Nov 2011 15:53:03 -0800 (PST) Message-ID: <4EC0585F.5000104@soe.ucsc.edu> Date: Sun, 13 Nov 2011 15:53:03 -0800 From: Erich Weiler User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:8.0) Gecko/20111105 Thunderbird/8.0 MIME-Version: 1.0 To: grenville armitage References: <4EC033B7.5080609@soe.ucsc.edu> <4EC0395C.3030302@swin.edu.au> <4EC055CB.40100@soe.ucsc.edu> In-Reply-To: <4EC055CB.40100@soe.ucsc.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-net@freebsd.org Subject: Re: Arg. TCP slow start killing me. X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 13 Nov 2011 23:53:03 -0000 > I suspect my firewall *is* the cause of the packet loss, unfortunately. > We're sending multiple streams in from multiple sources and > destinations, but the aggregate bandwidth coming into the firewall is > consistent no matter how many sources and destinations we have. It maxes > at about 2Gb/s. That's why I was trying to tweak the firewall, to try > and get that number up. Sorry, to be clear, the *average* bandwidth was like 2Gb/s, I'm really trying to dodge the sawtooth traffic pattern in some way, I see it go up to 3Gb/s every once in a while. I was hoping to achieve getting closer to 3Gb/s on average by adding buffers to my firewall, but maybe that isn't the answer... I tried Jason's suggestions earlier but it didn't seem to help much unfortunately.