From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from masada.superduper.net (unknown [IPv6:2001:ba8:1f1:f263::2]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id 5023221F1F7; Mon, 18 May 2015 05:31:06 -0700 (PDT) Received: from 199-116-72-167.public.monkeybrains.net ([199.116.72.167] helo=[192.168.0.4]) by masada.superduper.net with esmtpsa (TLS1.0:RSA_ARCFOUR_MD5:128) (Exim 4.80) (envelope-from ) id 1YuKC1-0008Lz-HR; Mon, 18 May 2015 13:30:54 +0100 From: Simon Barber To: "Eggert, Lars" Date: Mon, 18 May 2015 05:30:45 -0700 Message-ID: <14d67011de0.27f7.e972a4f4d859b00521b2b659602cb2f9@superduper.net> In-Reply-To: References:

<8C015B1B-EFBA-4647-AD83-BAFDD16A4AF2@netapp.com>

<14d5800ec08.27f7.e972a4f4d859b00521b2b659602cb2f9@superduper.net> <1431919815.385726792@apps.rackspace.com> <55597353.2010408@superduper.net> User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 AquaMail/1.5.0.19 (build: 2100846) MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----------14d670141af176227f743d13868" X-Spam-Score: -2.9 (--) Cc: cake@lists.bufferbloat.net, "Klatsky, Carl" , cerowrt-devel@lists.bufferbloat.net, bloat Subject: Re: [Cerowrt-devel] [Bloat] heisenbug: dslreports 16 flow test vs cablemodems X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 18 May 2015 12:31:35 -0000 This is a multi-part message in MIME format. ------------14d670141af176227f743d13868 Content-Type: text/plain; charset="us-ascii"; format=flowed Content-Transfer-Encoding: 8bit I am likely out of date about Windows Update, but there's many other programs that do background downloads or uploads that don't implement LEDBAT or similar protection. The current AQM recommendation draft in the IETF will make things worse, by not drawing attention to the fact that implementing AQM without implementing a low priority traffic class (such as DSCP 8 - CS1) will prevent solutions like LEDBAT from working, or there being any alternative. Would appreciate support on the AQM list in the importance of this. Simon Sent with AquaMail for Android http://www.aqua-mail.com On May 18, 2015 4:42:43 AM "Eggert, Lars" wrote: > On 2015-5-18, at 07:06, Simon Barber > > wrote: > Windows update will kill your Skype call. > > Really? AFAIK Windows Update has been using a LEDBAT-like scavenger-type > congestion control algorithm for years now. > > Lars ------------14d670141af176227f743d13868 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: 8bit

I am likely out of date about Windows Update, but there's many other programs that do background downloads or uploads that don't implement LEDBAT or similar protection. The current AQM recommendation draft in the IETF will make things worse, by not drawing attention to the fact that implementing AQM without implementing a low priority traffic class (such as DSCP 8 - CS1) will prevent solutions like LEDBAT from working, or there being any alternative. Would appreciate support on the AQM list in the importance of this.

Simon

Sent with AquaMail for Android
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On May 18, 2015 4:42:43 AM "Eggert, Lars" <lars@netapp.com> wrote:

On 2015-5-18, at 07:06, Simon Barber <simon@superduper.net> wrote:

Windows update will kill your Skype call.

Really? AFAIK Windows Update has been using a LEDBAT-like scavenger-type congestion control algorithm for years now.

Lars

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