From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-x235.google.com (mail-lf0-x235.google.com [IPv6:2a00:1450:4010:c07::235]) (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 F0E2B3B2B0 for ; Thu, 23 Jun 2016 14:59:55 -0400 (EDT) Received: by mail-lf0-x235.google.com with SMTP id f6so101532100lfg.0 for ; Thu, 23 Jun 2016 11:59:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=8qXIwUsmbB8qAzYS8FrH+Kmdzy78LuoX5Av5sci4XQQ=; b=f5Bdv2Asul9anyZbPRTrwVfsja81Qe1h3Dd6rqxhoRNI/u80HUPUCC/ImWQUdUefe5 ujXUJgjnoLpymi/myyZYcY4I7sXzNcRiCjqTdesvHLk7s95iVkf5q96PRiPLRnF4MnNn rj5xQoO7UJbuRvrSdhaDkPIf5rmprrLEWsaLRp/fLO7F3D5KcZJmFtiiDfGNqqqJ8uYB 4JccPjdvhbW6uSpajtN/zgQ3IQG98Oa+tJzOZqaUfuIBk7J0iIKsEiBxDGPs3LyOnG6G huEWiSZ3Te2XRh7rI9TQEe34nPdCEzyHT75tF/IN0aQlNSQDM6NDsN9vcXG371flGzSx KJyg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=8qXIwUsmbB8qAzYS8FrH+Kmdzy78LuoX5Av5sci4XQQ=; b=moAMBQrN/LvljL0NskPyoJZY/SY+ad5/3RQfS61gzmOcZI3z7FbR2bPLj8uv+Milxe Fuzkh1lbyoZieNInoPBaJ7b5zHfAoSZ662oF0rVmJKdfYruhtZ9QNK8GQR5+wTgmgSnI HDMJRI55zIv8r3ncfJG7h6LqfUfMm2Pucloqq7IoQfLLl9b8BLgiE/jmayZ3HappTShv 0Da09es6Jmn5hja46p++Stvo/GsqpW2tcN1GEPTBK9feaaFPQoeqxrOoIl4r85VgMNMK 8rhKWItMmYCPxBDyw4mtPYTRoLGTPMnjGasl9MUIhJ9XmIjjMHBO6HKEOP2KulBbA39f VJKQ== X-Gm-Message-State: ALyK8tKaPAazxarPJlgiUShdw/b6SSTUhxIIara93FDW67xbhU99fGDaWGqak6tGJ/PJ8Q== X-Received: by 10.25.154.72 with SMTP id c69mr37833lfe.72.1466708394679; Thu, 23 Jun 2016 11:59:54 -0700 (PDT) Received: from bass.home.chromatix.fi (37-33-96-207.bb.dnainternet.fi. [37.33.96.207]) by smtp.gmail.com with ESMTPSA id 25sm271626lft.24.2016.06.23.11.59.52 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 23 Jun 2016 11:59:53 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) From: Jonathan Morton In-Reply-To: Date: Thu, 23 Jun 2016 21:59:14 +0300 Cc: "Moeller, Sebastian" , "codel@lists.bufferbloat.net" Content-Transfer-Encoding: quoted-printable Message-Id: References: <18D7F26F-B533-405A-9ED4-8ED0F4B2E5CF@caltech.edu> To: Greg White X-Mailer: Apple Mail (2.3124) Subject: Re: [Codel] Per-Paket-Overhead in DOCSIS networks X-BeenThere: codel@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: CoDel AQM discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Jun 2016 18:59:56 -0000 > On 23 Jun, 2016, at 21:51, Greg White wrote: >=20 > For downstream packets, the DOCSIS MAC header consists of the standard = 6-byte MAC Header, plus 6 bytes for the DS EHDR and 5 bytes for the = Downstream Privacy EH Element. So, 17+14+4=3D35 bytes of per-packet = overhead for a downstream DOCSIS MAC Frame. For upstream packets, there = will typically be only the 6-byte MAC Header, plus the 4 byte Upstream = Privacy EH version 2 Element, so 10+14+4=3D28 bytes of per-packet = overhead for an Upstream DOCSIS MAC Frame. Thanks Greg, this is useful information for me to build into my next = overhead model update. - Jonathan Morton