From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wg0-x230.google.com (mail-wg0-x230.google.com [IPv6:2a00:1450:400c:c00::230]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 3150721F112 for ; Tue, 18 Mar 2014 11:54:43 -0700 (PDT) Received: by mail-wg0-f48.google.com with SMTP id l18so6203600wgh.31 for ; Tue, 18 Mar 2014 11:54:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=SZr5elTxfeP5HZh5xlTFnkZfmeHcV1tlHPMXxWAiCns=; b=B2i3vbmbQ6HPCh/XdijiqsqvOHDgJ+sq0zRkr2jcdcUnDUjp4Fw8MWe66xd67TuiIp zAEZ8FhQhru4K+5CnjUXzdT1IoGMnsB5GmxPfS84/icZ8OaZ5dF8o49bd8mIluoy89ZQ s8OO+os9QaKCRL41NBEjMDSNrcOOXHJlC11Um2AeJlHZ7lER2lzCdM9RzXlTvf/0YpVX uReB1T+iU74y1aESb2LCs+WT9J/6JzVM8pGMtUYZt3bz2wTGxoPpHcfuUMTozrvybPxx 5t8qTDE1td1uXiGy/UXvtySa1f1xheWrc8B8aK/d70VaTv6c097nDZNi9ibAmT+WeBMK WsNA== MIME-Version: 1.0 X-Received: by 10.194.6.106 with SMTP id z10mr24556120wjz.1.1395168881069; Tue, 18 Mar 2014 11:54:41 -0700 (PDT) Received: by 10.216.8.1 with HTTP; Tue, 18 Mar 2014 11:54:41 -0700 (PDT) In-Reply-To: <07BD4518-2A7E-4F43-8978-791E3B2BDA2A@cisco.com> References: <20140318145221.GA31327@sesse.net> <07BD4518-2A7E-4F43-8978-791E3B2BDA2A@cisco.com> Date: Tue, 18 Mar 2014 14:54:41 -0400 Message-ID: From: Dave Taht To: "Fred Baker (fred)" Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: bloat Subject: Re: [Bloat] AQM creeping into L2 equipment 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: Tue, 18 Mar 2014 18:54:44 -0000 On Tue, Mar 18, 2014 at 2:05 PM, Fred Baker (fred) wrote: > > On Mar 18, 2014, at 10:17 AM, Dave Taht wrote: > >>> I thought some of you might be interested in a small observation I made >>> today: Cisco 2960-X, their latest low-end (?) L2 access switch offering >>> (well, it can do some L3 as well, especially the 2960-XR, but I don't t= hink >>> it's very commonly used), has WRED on its feature list. They also have >> >> I would certainly like good documentation on how to configure it and >> results with/without on a two ports into one test. > > Thus saith google: http://www.cisco.com/c/en/us/td/docs/switches/lan/cata= lyst2960x/software/15-0_2_EX/qos/configuration_guide/b_qos_152ex_2960-x_cg/= b_qos_152ex_2960-x_cg_chapter_010.html The standard test that I'm most interested in is the 2 ports into 1 topolog= y: SOURCE | SWITCH | | BOX1 BOX2 and finding "optimal" settings for that. All links are gigE for this... each box runs a copy of the rrul test (attempting to saturate up/down and measure loss/delay on several differently classified measurement flows), with various switch configurations (wred, srr, wtd, whatever) can add in a delay box. Donations/loans of various cool switches gladly accepted. :) A topology with a 10Gige source is also interesting. There have been so many improvements to linux tcp that it's hard to intuit behaviors since when we started the debloating effort. --=20 Dave T=E4ht Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.= html