From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-x241.google.com (mail-lf0-x241.google.com [IPv6:2a00:1450:4010:c07::241]) (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 EE7DF3B25E for ; Fri, 10 Jun 2016 21:36:25 -0400 (EDT) Received: by mail-lf0-x241.google.com with SMTP id w130so4136463lfd.2 for ; Fri, 10 Jun 2016 18:36:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=subject:mime-version:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=CvdoPL2Uv5ZZhzHIIiDj5amWuKxlo2lNNDW3Os0irVo=; b=LbAgWrxQ1vHAtZ88tybkwwdYNMYsRzycTMvG1ZXnqIsMGrI/A4CrQj5F5KTQDV9CRZ iCmUJi+goaCoHFiYMpRhmxf1yGlFzK9WWhk0fFQ7tSgro1qMc3IHbA4CVNMntiUZPpdq CwMIsUC5ZJDn+gTY1R0J3BaFViW+Ce4e/hK9D21I8l/mFJu11yUzHsvB2+0C9E/WeIdK foi26oTZ/LG7NDzKpxcc3ZdWAi+ym80zbALdw+ZFTqHZc1Mqs+Y5ZGXHDPDYsWIGgxIv 8M7Bk8wwFd2GZYSJxCKKkMx25c8TajfDjwMEmq/Yphx+EiiZa1DsQOo9lfk3KE/JaB8p g/og== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:subject:mime-version:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=CvdoPL2Uv5ZZhzHIIiDj5amWuKxlo2lNNDW3Os0irVo=; b=jWFd1v3Wq0AUV2WgSAlO/6kg6e0izHVUE2b0OSjmup5xiWmNUFWDqetVsOnH+T8xN0 3X9G+bdg7PCBUqx0McP1ZpCqACL5Aihjg6NvVXmBxZvxoDKLkAR3kgPPdt+aUtzp0wiy WXG9BtQT0NWQefNB6XliQ3wUXfwYSUB+wKBZZ3usJupaOrODd0OkE9DYEAnH/HqrebPL XAtfpsMQDBE5F8riu+Q++l8n+hAapM1mKocH1COTXaSZng0k3LaS3L2Uy4BoqMO3o9fT 5vLQNtkjwC+o1o6/X3HSy1SG5EhpM+RyEEqRM4doH1iu96ClHlO1CzB5dvjA9TSKiZ03 YfgA== X-Gm-Message-State: ALyK8tJ98ifVHwgS3J9fv9KOdIxDg8V3Sq85oAO+oiQ65gsuUfzFeIJN3DJ/X5N7d2JM/g== X-Received: by 10.25.77.195 with SMTP id a186mr1527028lfb.159.1465608984540; Fri, 10 Jun 2016 18:36:24 -0700 (PDT) Received: from bass.home.chromatix.fi (87-93-1-125.bb.dnainternet.fi. [87.93.1.125]) by smtp.gmail.com with ESMTPSA id i185sm1492440lfb.38.2016.06.10.18.36.23 (version=TLSv1/SSLv3 cipher=OTHER); Fri, 10 Jun 2016 18:36:23 -0700 (PDT) Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) Content-Type: text/plain; charset=us-ascii From: Jonathan Morton X-Priority: 3 (Normal) In-Reply-To: <1465595130.805432550@apps.rackspace.com> Date: Sat, 11 Jun 2016 04:36:20 +0300 Cc: Eric Johansson , cerowrt-devel@lists.bufferbloat.net Content-Transfer-Encoding: quoted-printable Message-Id: <17232B61-7FB2-4339-8202-C9E43425130E@gmail.com> References: <55fdf513-9c54-bea9-1f53-fe2c5229d7ba@eggo.org> <871t4as1h9.fsf@toke.dk> <3D32F19B-5DEA-48AD-97E7-D043C4EAEC51@gmail.com> <1465267957.902610235@apps.rackspace.com> <1465268329.938313737@apps.rackspace.com> <1465595130.805432550@apps.rackspace.com> To: dpreed@reed.com X-Mailer: Apple Mail (2.3124) Subject: Re: [Cerowrt-devel] trying to make sense of what switch vendors say wrt buffer bloat 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: Sat, 11 Jun 2016 01:36:26 -0000 > On 11 Jun, 2016, at 00:45, dpreed@reed.com wrote: >=20 > My thought is to use an ethernet ping while our system is loaded. = (our protocol is at the Ethernet layer, no IP stack). Anyone have an = idea of the simplest way to do that? It should be possible to write a utility and a daemon which can listen = for and produce raw Ethernet frames using some unused protocol number. = It might even turn out to be quite easy. One quick-and-dirty solution would be to bring up an IP address (or just = an ARP daemon) on the target host, then use arping. - Jonathan Morton