From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lb0-x229.google.com (mail-lb0-x229.google.com [IPv6:2a00:1450:4010:c04::229]) (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 D420D21F304 for ; Sun, 12 Apr 2015 17:01:50 -0700 (PDT) Received: by lbbzk7 with SMTP id zk7so47054980lbb.0 for ; Sun, 12 Apr 2015 17:01:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=YuhFiXo8XMULPFINMICPhf7fT94WivCwEQCH6wyfbik=; b=VyU+6gaWlSDAO2BNEuUZedW2kcSjLutIo/fZSTu+UR8mfvFK+WTUIJo33E/gRCZpZS ymBlBU5ZmUxxzZ5qp/vrwxQS0SARanvt8Zxx/1sJhoRB+c8kcFBNWWQpZC2CfeJVvG48 b+nG/FKq0vHdBSQgLPVb9SFIOaW363Xai6J59d3d0Gc8VFBX++B5pX/UoaTy67pIM4ai +vMIqJou4V1MkGZWvzBHhNkeWqHtaeTyO7YHGVDrpzCaILcfStLMhqdx4XpJOjh+zuZ7 jyj3an1kTtcx373xhGqwxjF/NwVo2/mzZr100VUJ952lFjgUkA68bqEsDrB6YCL0f13E 2EAA== X-Received: by 10.152.19.132 with SMTP id f4mr10701776lae.115.1428883308545; Sun, 12 Apr 2015 17:01:48 -0700 (PDT) Received: from bass.home.chromatix.fi (87-93-27-145.bb.dnainternet.fi. [87.93.27.145]) by mx.google.com with ESMTPSA id y8sm1291588lag.10.2015.04.12.17.01.46 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 12 Apr 2015 17:01:47 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2098\)) From: Jonathan Morton In-Reply-To: Date: Mon, 13 Apr 2015 03:01:42 +0300 Content-Transfer-Encoding: quoted-printable Message-Id: References: To: Dave Taht X-Mailer: Apple Mail (2.2098) Cc: cake@lists.bufferbloat.net Subject: Re: [Cake] squash option X-BeenThere: cake@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Cake - FQ_codel the next generation List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 13 Apr 2015 00:02:19 -0000 > On 13 Apr, 2015, at 01:20, Dave Taht wrote: >=20 > Inbound diffserv markings cannot be trusted. A simple remark to > dscp & ECT(3) of diffserv is kind of a must for cake. As I noted previously, cake can trivially be configured to ignore = Diffserv. A simple iptables rule would then suffice to remove the mark = for downstream consumers if desired. More useful would be the ability to re-mark packets according to local = Diffserv policy before cake=E2=80=99s classifier acts on it. Iptables = doesn=E2=80=99t help here, because it runs *after* ingress qdiscs (even = in ifb). Unfortunately, the likely complexity of the configuration = mechanism for such a device runs counter to cake=E2=80=99s deliberately = simple configuration interface. However, I have no objection to a second qdisc which could be run in = series with cake to perform that function. This would be a qdisc which = performs no queueing of its own, and simply performs the re-marking = before passing the packet up the qdisc stack. The configuration = mechanism of this can be relatively complex, but narrowly focused on the = re-marking task. Call it =E2=80=9Cicing=E2=80=9D or =E2=80=9Ccherry=E2=80= =9D or whatever, to emphasise that it goes on top of cake. - Jonathan Morton