From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-12-ewr.dyndns.com (mxout-132-ewr.mailhop.org [216.146.33.132]) by lists.bufferbloat.net (Postfix) with ESMTP id ED1532E0061 for ; Fri, 4 Mar 2011 09:00:57 -0800 (PST) Received: from scan-11-ewr.mailhop.org (scan-11-ewr.local [10.0.141.229]) by mail-12-ewr.dyndns.com (Postfix) with ESMTP id 0DE63932322 for ; Fri, 4 Mar 2011 16:59:59 +0000 (UTC) X-Spam-Score: 0.1 () X-Mail-Handler: MailHop by DynDNS X-Originating-IP: 75.145.127.229 Received: from gw.co.teklibre.org (75-145-127-229-Colorado.hfc.comcastbusiness.net [75.145.127.229]) by mail-12-ewr.dyndns.com (Postfix) with ESMTP id A2A03931D70 for ; Fri, 4 Mar 2011 16:59:57 +0000 (UTC) Received: from cruithne.co.teklibre.org (unknown [IPv6:2002:4b91:7fe5:1::20]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "cruithne.co.teklibre.org", Issuer "CA Cert Signing Authority" (verified OK)) by gw.co.teklibre.org (Postfix) with ESMTPS id 17FF55EA38 for ; Fri, 4 Mar 2011 09:59:57 -0700 (MST) Received: by cruithne.co.teklibre.org (Postfix, from userid 1000) id A7596120806; Fri, 4 Mar 2011 09:59:55 -0700 (MST) From: d@taht.net (Dave =?utf-8?Q?T=C3=A4ht?=) To: bloat@lists.bufferbloat.net Organization: Teklibre - http://www.teklibre.com References: <87vd05jzqt.fsf@cruithne.co.teklibre.org> <874o7j4ovn.fsf@cruithne.co.teklibre.org> Date: Fri, 04 Mar 2011 09:59:55 -0700 In-Reply-To: (Thomas Phelan's message of "Fri, 4 Mar 2011 10:21:48 -0500") Message-ID: <87fwr2zur8.fsf@cruithne.co.teklibre.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Subject: Re: [Bloat] Bufferbloat X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 04 Mar 2011 17:00:58 -0000 This is feedback from the Director of Technology at a large school (private high school) system regarding figuring out bufferbloat in his environment.=20 Any thoughts? >>> When I get some time I would like to look a little closer to see if >>> this affects us in a significant way, but right now it doesn't seem >>> broken (translation: nobody is complaining) so I have other things >>> that demand my time >>> more . >>It's an interesting puzzle. Most people are reporting enormous gains in >>voip, dhcp, ntp, DNS, and other udp based protocols, once they fix >>latency under load. > > Perhaps I didn't look hard enough, but most of what I read regarding > testing and troubleshooting seemed to apply to very small > networks. While I could test individual clients I don't think this > would be terribly useful and worth the time. What I really need to do > is find a way to get stats on the performance of our entire network's > Internet connectivity=C2=A0during peak times to see if latency is a > problem. During these times we easily have 700+ clients and thousands > of flows and I have no idea how to get aggregate stats that are useful > to diagnose bufferbloat on our network. Of course we also have QoS (we > use the NetEqualizer which is a great little box) > which=C2=A0intentionality=C2=A0delays packets of our heaviest users so I = would > have to find a way to factor effects due to the QoS out of any > stats--turning off the QoS during peak times is not an option. If you > know of pages which I missed with discussion about mid sized networks > like ours please send the URL's my way. > > Take care Dave and ping me if you're ever in the area. --=20 Dave Taht http://nex-6.taht.net