From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.gmx.net (mout.gmx.net [212.227.15.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 42E0B3B2A4 for ; Sun, 3 Dec 2017 15:14:22 -0500 (EST) Received: from [192.168.1.134] ([79.210.219.14]) by mail.gmx.com (mrgmx002 [212.227.17.190]) with ESMTPSA (Nemesis) id 0Lqi70-1ezr9K0FUI-00eLf0; Sun, 03 Dec 2017 21:14:20 +0100 Date: Sun, 03 Dec 2017 21:14:20 +0100 User-Agent: K-9 Mail for Android In-Reply-To: <87bmjftwn3.wl-jch@irif.fr> References: <7B92DF4D-B6B5-4A64-9E10-119DCA2D4A6F@ifi.uio.no> <1512037480.19682.10.camel@gmail.com> <6b494910-1373-afb0-5b93-99b725391fb3@gmail.com> <87wp2638yo.fsf@toke.dk> <87tvxa36sn.fsf@toke.dk> <87po7ygxai.fsf@nemesis.taht.net> <87shcui3ni.wl-jch@irif.fr> <87shcs9k0v.wl-jch@irif.fr> <87po7vud6q.wl-jch@irif.fr> <87bmjftwn3.wl-jch@irif.fr> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable To: bloat@lists.bufferbloat.net, Juliusz Chroboczek , Ryan Mounce From: Sebastian Moeller Message-ID: <336A8DFB-1748-4024-A290-61393695CB55@gmx.de> X-Provags-ID: V03:K0:B9YuvePm/ENazsmbHfX0roQY15nlqTKypwy28/Ag4B1YmtkgeL1 DcJFbPmVFJvBs6Ye9uIar/Udt/mUkT73IbbRBWPla8ZvFjJ7Rx4qnPx3vFm6Bp58QdPyv8E Z4KhERr7rWTYrala/7IrbbNUaYe9BpBZ5PU6ypx727EEE4yqFgEjlnq5n5Lr2HUfcD6aw8r QsZZ29c0Bd+mtU9Z8gShw== X-UI-Out-Filterresults: notjunk:1;V01:K0:w6IlAR/3NSY=:eRQAo39AAOf5S926DdTf2j n415x2E5UM/6HSKgkAGDajUkHKQgIaGTTyJrJfwr1jpD9sA92P0tzHVSXF7v4/YvnkBAg852i vk4EvDmlDjz523rA0xLAHpnNg9RRyUxdh26jgqeQjzkIsUd3khYBdE0jvBDcSYaqD3T/e/mvj iUaF2NT19NQjZRAIflXJLhKokNjR2X0p9Zwxh386/KnuxuejPS/bnqX8wYsXbzTkUFdi0mU44 +M0WYiCHnMu9OMOFEgiFz1z4AP8VnUawwHEEOpY20c26NetF8TzUh5hnfdQZG308zwjDnNSpy GMlUEVXQhPXQn5seyPwPG51fZpHX9VOv9TvEQxGNzVq7OuGQq58ie8beiqp8fxpTw1S6YDJv1 rLoENPODjCQA6vmFZp9Nw2vzyNqicIo+VBqJeZdwA4+Lc+xkQQWFeR4QY+SkyKLhiNqPrKixt KURplFroYZN0OZ58ISAsAbCKWV3+Q/mNwtPciinEFMHQO8sR3UZkQEepv99TpJTHrELuPhJPo S91z6ARVGhw2BQlKugxqmDg7ow+R6nbgHcsX4yIdz6Z8zLgb67snrjoegQcC50zhLQQemlRgL I+5edWNIDqepYWR3Aja5jM3/s15A2MqQFnZzTPmFJu6vX69b2/RwGM6tW/BDztZ+Gb8tMKpgK MvAnDo4P1aOulpQ98sLJ2tUcx+BAK+mT5ndHiHCyImpBzboQ1hx6t4/tz/MQCyyM5mMywWLft h4hNwOdA2Ui/iqBEEH9Dgi0+otcvlryrRYBErMF1epXvOGGcXfFjTgU+asM49UaSK++u64Hkz HKEyAMNyPYEXfm+HdjLaYIftyOtG/Bss3/63dUnGHLF0ld2wpM= Subject: Re: [Bloat] [Make-wifi-fast] benefits of ack filtering X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 03 Dec 2017 20:14:22 -0000 On December 3, 2017 8:54:40 PM GMT+01:00, Juliusz Chroboczek wrote: >> Many would kill for a 10:1 DOCSIS connection=2E 50:1 is not rare, and I >> have personally been subscribed to a near 100:1 service=2E > >Some people should not be allowed to design networks=2E > >> The DOCSIS shaper deals with ethernet frames so 58 / 1518 bytes=2E > >Could you please point me to details of the DOCSIS shaper? the relevant section from the Docsis standard (http://www=2Ecablelabs=2Eco= m/specification/docsis-3-0-mac-and-upper-layer-protocols-interface-specific= ation/): "C=2E2=2E2=2E7=2E2 Maximum Sustained Traffic Rate 632 This parameter is th= e rate parameter R of a token-bucket-based rate limit for packets=2E R is e= xpressed in bits per second, and MUST take into account all MAC frame data = PDU of the Service Flow from the byte following the MAC header HCS to the e= nd of the CRC, including every PDU in the case of a Concatenated MAC Frame= =2E This parameter is applied after Payload Header Suppression; it does not= include the bytes suppressed for PHS=2E The number of bytes forwarded (in = bytes) is limited during any time interval T by Max(T), as described in the= expression: Max(T) =3D T * (R / 8) + B, (1) where the parameter B (in byte= s) is the Maximum Traffic Burst Configuration Setting (refer to Annex C=2E2= =2E2=2E7=2E3)=2E NOTE: This parameter does not limit the instantaneous rate= of the Service Flow=2E The specific algorithm for enforcing this parameter= is not mandated here=2E Any implementation which satisfies the above equat= ion is conformant=2E In particular, the granularity of enforcement and the = minimum implemented value of this parameter are vendor specific=2E The CMTS= SHOULD support a granularity of at most 100 kbps=2E The CM SHOULD support = a granularity of at most 100 kbps=2E NOTE: If this parameter is omitted or = set to zero, then there is no explicitly-enforced traffic rate maximum=2E T= his field specifies only a bound, not a guarantee that this rate is availab= le=2E" So in essence DOCSIS users need to only account for 18 Bytes of ethernet o= verhead in both ingress and egress directions under non-congested condition= s=2E > >-- Juliusz >_______________________________________________ >Bloat mailing list >Bloat@lists=2Ebufferbloat=2Enet >https://lists=2Ebufferbloat=2Enet/listinfo/bloat --=20 Sent from my Android device with K-9 Mail=2E Please excuse my brevity=2E