From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from korolev.univ-paris7.fr (korolev.univ-paris7.fr [IPv6:2001:660:3301:8000::1:2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 003C43B25D; Thu, 28 Apr 2016 15:55:14 -0400 (EDT) Received: from potemkin.univ-paris7.fr (potemkin.univ-paris7.fr [IPv6:2001:660:3301:8000::1:1]) by korolev.univ-paris7.fr (8.14.4/8.14.4/relay1/56228) with ESMTP id u3SJt58Y013335 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Thu, 28 Apr 2016 21:55:05 +0200 Received: from mailhub.math.univ-paris-diderot.fr (mailhub.math.univ-paris-diderot.fr [81.194.30.253]) by potemkin.univ-paris7.fr (8.14.4/8.14.4/relay2/56228) with ESMTP id u3SJt5ES026576; Thu, 28 Apr 2016 21:55:05 +0200 Received: from mailhub.math.univ-paris-diderot.fr (localhost [127.0.0.1]) by mailhub.math.univ-paris-diderot.fr (Postfix) with ESMTP id 9204862090; Thu, 28 Apr 2016 21:55:05 +0200 (CEST) X-Virus-Scanned: amavisd-new at math.univ-paris-diderot.fr Received: from mailhub.math.univ-paris-diderot.fr ([127.0.0.1]) by mailhub.math.univ-paris-diderot.fr (mailhub.math.univ-paris-diderot.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id XQeqU5j9tPTe; Thu, 28 Apr 2016 21:55:01 +0200 (CEST) Received: from trurl.pps.univ-paris-diderot.fr (col75-1-78-194-40-74.fbxo.proxad.net [78.194.40.74]) (Authenticated sender: jch) by mailhub.math.univ-paris-diderot.fr (Postfix) with ESMTPSA id CAD1561FE0; Thu, 28 Apr 2016 21:55:00 +0200 (CEST) Date: Thu, 28 Apr 2016 21:55:02 +0200 Message-ID: <87oa8tjyp5.wl-jch@pps.univ-paris-diderot.fr> From: Juliusz Chroboczek To: Henning Rogge Cc: make-wifi-fast@lists.bufferbloat.net, "babel-users@lists.alioth.debian.org" , "cerowrt-devel@lists.bufferbloat.net" In-Reply-To: References: <1461849006.60252745@apps.rackspace.com> <87oa8tyhug.wl-jch@pps.univ-paris-diderot.fr> <878tzx4zno.fsf@toke.dk> <4F01E09C-FE7E-4ADA-A142-656969C1A3CC@gmx.de> <87shy5k1hb.wl-jch@pps.univ-paris-diderot.fr> <87pot9jzuw.wl-jch@pps.univ-paris-diderot.fr> User-Agent: Wanderlust/2.15.9 MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (korolev.univ-paris7.fr [IPv6:2001:660:3301:8000::1:2]); Thu, 28 Apr 2016 21:55:05 +0200 (CEST) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (potemkin.univ-paris7.fr [194.254.61.141]); Thu, 28 Apr 2016 21:55:05 +0200 (CEST) X-Miltered: at korolev with ID 57226A99.001 by Joe's j-chkmail (http : // j-chkmail dot ensmp dot fr)! X-Miltered: at potemkin with ID 57226A99.000 by Joe's j-chkmail (http : // j-chkmail dot ensmp dot fr)! X-j-chkmail-Enveloppe: 57226A99.001 from potemkin.univ-paris7.fr/potemkin.univ-paris7.fr/null/potemkin.univ-paris7.fr/ X-j-chkmail-Enveloppe: 57226A99.000 from mailhub.math.univ-paris-diderot.fr/mailhub.math.univ-paris-diderot.fr/null/mailhub.math.univ-paris-diderot.fr/ X-j-chkmail-Score: MSGID : 57226A99.001 on korolev.univ-paris7.fr : j-chkmail score : . : R=. U=. O=. B=0.000 -> S=0.000 X-j-chkmail-Score: MSGID : 57226A99.000 on potemkin.univ-paris7.fr : j-chkmail score : . : R=. U=. O=. B=0.000 -> S=0.000 X-j-chkmail-Status: Ham X-j-chkmail-Status: Ham Subject: Re: [Cerowrt-devel] [Babel-users] [Make-wifi-fast] perverse powersave bug with sta/ap mode X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.20 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: Thu, 28 Apr 2016 19:55:15 -0000 >> What problem are you trying to solve? > Less useless overhead on slow-speed networks (think VHF/UHF radio). > DAD works by pretending that the colliding address should be in > communication range, which is not true for mesh networks. I understand that DAD is pretty useless in sparse mesh networks, but is it worth adding a special case just to avoid three packets every time you reboot? If you've got links so slow that DAD is a significant overhead, perhaps you should be looking into some generic form of header compression rather than trying to special-case DAD. -- Juliusz