From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.net.t-labs.tu-berlin.de (mail.net.t-labs.tu-berlin.de [IPv6:2001:470:96b9:4:130:149:220:252]) by huchra.bufferbloat.net (Postfix) with ESMTP id B897E21F0DE for ; Mon, 13 Aug 2012 07:18:43 -0700 (PDT) Received: from [130.149.220.37] (ibis.net.t-labs.tu-berlin.de [130.149.220.37]) by mail.net.t-labs.tu-berlin.de (Postfix) with ESMTPSA id 1687A4C04A1 for ; Mon, 13 Aug 2012 16:18:41 +0200 (CEST) Message-ID: <50290CC0.7000304@net.t-labs.tu-berlin.de> Date: Mon, 13 Aug 2012 16:18:40 +0200 From: Oliver Hohlfeld User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120714 Thunderbird/14.0 MIME-Version: 1.0 To: bloat@lists.bufferbloat.net References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Bloat] AQM usage in current Internet routers 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: Mon, 13 Aug 2012 14:18:44 -0000 Hi, > I read the blog from Getty, saying that RED or other variants of AQM > actually are not ran in current Internet routers. That's a myth. RED is /not widely/ used, as it's configuration is unclear and subject to a debate that has never converged. But there are large operators out there that do deploy RED in their backbone, so saying that it's never used is simple incorrect. However, I also would be interested in statistics on the deployment of AQM. > If not, do you know how to detect / evaluate the usage of RED? There is related work out there. See for example the paper by Dischinger et al.: http://www.mpi-sws.org/~mdischin/papers/07_imc_bb.pdf See for example Figure 16 and Section 4.2.2. > Maybe it's a good work to revisit AQM deployment in the wild of the > Internet? What's your opinion??? But what would be the message of this work? I guess providing some number would be nice, but would they have any impact? What if you figure out that RED is not widely deployed (which is known); would it make a difference to know the exact number for a subset of ASes? To me, the pros and cons of RED are known and so are the reasons why or why not to deploy it. However, it could be interesting to track the deployment of Coddle and see if operators adapt due to its ease of use. But that would be a longitudinal study. Best, Oliver