From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi0-x22f.google.com (mail-oi0-x22f.google.com [IPv6:2607:f8b0:4003:c06::22f]) (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 7571C21F3F2 for ; Fri, 15 May 2015 09:45:51 -0700 (PDT) Received: by oign205 with SMTP id n205so86531215oig.2 for ; Fri, 15 May 2015 09:45:11 -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=XfmfelNUb5auJMXF9BJU5gn36hhwLjbJT0UDOgFsYAI=; b=A+XEOHG9BPIKQoFZpmSCcozG2UbY7MdvODBr8Pc0IOz14YC84KLBZh0QoXhBkkNy/r 9fLw5/im+1RFRyHKaj3Itl9Bg8+gKZtJUVKHfxeMeuZFPa8o75jomjScNaXtKoEfOz8p zj0ClPHjNqY8TV0DdX/BRwJa5yb0VgQlp7PTIUY2PjZBlEuwVDhR1Tah7LoGOpLhe32T w/k2Gr2D5dFTU0kojt0tpiln6hE7SdmXdaceU+Kwm+5gYRK/iPy9rMtwZaEX5Ey/VHKL 53gyKDYVR05FBK5dgXpo53uDTdphYXZ8CUdArmLYiOIr4F/i3Wl96A8qmaoFB6qUcwjL t8jw== MIME-Version: 1.0 X-Received: by 10.202.4.133 with SMTP id 127mr8600327oie.11.1431708310771; Fri, 15 May 2015 09:45:10 -0700 (PDT) Received: by 10.202.71.139 with HTTP; Fri, 15 May 2015 09:45:10 -0700 (PDT) In-Reply-To: References: <55552014.2010808@darbyshire-bryant.me.uk> <5555AB46.5010508@darbyshire-bryant.me.uk> Date: Fri, 15 May 2015 09:45:10 -0700 Message-ID: From: Dave Taht To: Mikael Abrahamsson Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Cc: bloat Subject: Re: [Bloat] tc -s qdisc questions 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, 15 May 2015 16:46:51 -0000 X-List-Received-Date: Fri, 15 May 2015 16:46:51 -0000 X-List-Received-Date: Fri, 15 May 2015 16:46:51 -0000 X-List-Received-Date: Fri, 15 May 2015 16:46:51 -0000 On Fri, May 15, 2015 at 1:55 AM, Mikael Abrahamsson wrot= e: > On Fri, 15 May 2015, Kevin Darbyshire-Bryant wrote: > >> Ahh! Penny drops, light goes on. Thanks Jonathan & Dave. I thought it >> was some magic the router performed but now I can see how silly my think= ing >> is on that. So presumably it would be helpful to enable ecn on the open= wrt >> router box IF that box were producing significant traffic of its own, in >> addition to all the LAN side boxes? > > > Correct. If it for instance was running a http proxy server (and thus > terminating TCP sessions), turning on ECN on the box itself would make > sense. This was (prior to crypto on everything http starting to be mandated) a very good idea for satellite links - run everything through a proxy, make the proxy and proxy box be smarter about tcp/ecn - and set the fq_codel implementation more appropriately for the rtt. Web proxies are still quite heavily used in education and some corporate markets. In fact the first ever commercially deployed fq_codel implementati= on (in NZ) was on a web proxy/firewall box. I do wish more high end firewall makers were paying attention to the bufferbloat work. They are usually the first line of defense and sole hop before hitting the (cable,dsl,fiber)modem and thus are perfect targets for deploying aqm/fq technologies. Certainly the pfsense folk are getting it but no sign of life at barracuda and checkpoint that I know of. > -- > Mikael Abrahamsson email: swmike@swm.pp.se --=20 Dave T=C3=A4ht Open Networking needs **Open Source Hardware** https://plus.google.com/u/0/+EricRaymond/posts/JqxCe2pFr67