From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from g5t0006.atlanta.hp.com (g5t0006.atlanta.hp.com [15.192.0.43]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "smtp.hp.com", Issuer "VeriSign Class 3 Secure Server CA - G3" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 7FF9F21F115 for ; Thu, 27 Dec 2012 12:10:38 -0800 (PST) Received: from g5t0029.atlanta.hp.com (g5t0029.atlanta.hp.com [16.228.8.141]) by g5t0006.atlanta.hp.com (Postfix) with ESMTP id F1A4AC02D; Thu, 27 Dec 2012 20:10:36 +0000 (UTC) Received: from [16.103.148.51] (tardy.usa.hp.com [16.103.148.51]) by g5t0029.atlanta.hp.com (Postfix) with ESMTP id 95D962005C; Thu, 27 Dec 2012 20:10:36 +0000 (UTC) Message-ID: <50DCAB3B.5010902@hp.com> Date: Thu, 27 Dec 2012 12:10:35 -0800 From: Rick Jones User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121011 Thunderbird/16.0.1 MIME-Version: 1.0 To: Hannes Frederic Sowa References: <20121227023728.GB19548@order.stressinduktion.org> In-Reply-To: <20121227023728.GB19548@order.stressinduktion.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: bloat@lists.bufferbloat.net Subject: Re: [Bloat] enabling outgoing tcp-ecn by default for ipv6 links 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: Thu, 27 Dec 2012 20:10:38 -0000 On 12/26/2012 06:37 PM, Hannes Frederic Sowa wrote: > Hello! > > I am thinking about advancing the ipv4/tcp_ecn knob in linux to > distinguish between ipv4 and ipv6 transport and enable ecn signaling > on outgoing ipv6 connections by default (for me, at least). I am > currently doing so with the help of iptables (echo 1 > tcp_ecn and -j > ECN --ecn-tcp-remove). Any particular reason you aren't willing/able to just flip the net.ipv4.tcp_ecn sysctl to turn it on for both? FWIW, that is what I have done on netperf.org, with an eye towards seeing what ceases working. Thusfar things seem OK. At least I've not had anyone contact me to say "Hey! Why can't I reach netperf.org!" ... happy benchmarking, rick jones