From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wg0-x22b.google.com (mail-wg0-x22b.google.com [IPv6:2a00:1450:400c:c00::22b]) (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 1D71121F229; Mon, 7 Apr 2014 11:18:02 -0700 (PDT) Received: by mail-wg0-f43.google.com with SMTP id x13so7258271wgg.14 for ; Mon, 07 Apr 2014 11:18:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type :content-transfer-encoding; bh=kGocboBF4ytkty314qh6SPVFmwxegiH3e8zSrFXL5V8=; b=yyNexpil6y5N/eMFD2UzCY6YZ4tXR0/QKGeneJ1g9dRwzwmNeU8KOiCU75yVTxoKdg OW6HnFcMPJZg0Fuz/viTQjHgM7JO4uc0PGTH+bdaO38fgu0aECT1pQMnVM1n7YstQ1eA fOMNWp/3GibciRy14VHmhRHVAZqnvHXRt00cVwSuwqefuCOPHXEY2EWE0B+f9Z90Paqc fTios88iV+uDAV00UQ9RSMpMZE0oJfvGHC6cknfYHeAZfSTNuNxEac3WAFCOYEQOFArb ZQhmAXrh51Y7Is/4JsnNwYCrHQJ0iu1zoI0bMoKQjTvAbT9I49NL1aISJ8E3a1PLcIQK 1tXw== MIME-Version: 1.0 X-Received: by 10.194.175.70 with SMTP id by6mr43669011wjc.3.1396894680827; Mon, 07 Apr 2014 11:18:00 -0700 (PDT) Received: by 10.216.177.10 with HTTP; Mon, 7 Apr 2014 11:18:00 -0700 (PDT) Date: Mon, 7 Apr 2014 11:18:00 -0700 Message-ID: From: Dave Taht To: "cerowrt-devel@lists.bufferbloat.net" , bloat Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Subject: [Cerowrt-devel] modest scale local measurements X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 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: Mon, 07 Apr 2014 18:18:03 -0000 This weekend for the first time ever I saw netflix become unusable for several hours on a friday night. On DSL line capable of over 6mbits down, it slowed below 1.2Mbit and frequently stopped. For a change I was NOT interested in leaping up from the couch to capture traffic (read a book instead!) to see what was up, but it did set me to thinking about monitoring congestion and delay on local network segments, like those you find in cable, where you frequently see arp requests go by anyway and thus can build an partial picture of the rest of the wire. I was seriously impressed and somewhat scared by the power of zmap: https://zmap.io/ But it would be interesting to be able to collect a periodic picture of the universe one hop beyond the local gateway. --=20 Dave T=E4ht NSFW: https://w2.eff.org/Censorship/Internet_censorship_bills/russell_0296_= indecent.article