From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.gmx.net (mout.gmx.net [212.227.17.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id A70433B2A4 for ; Thu, 29 Jun 2023 10:32:33 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.de; s=s31663417; t=1688049147; x=1688653947; i=moeller0@gmx.de; bh=PxUJxFLllyjD2ZCD9yVrYQECJ+Lmf5miy8moezq7kcg=; h=X-UI-Sender-Class:Subject:From:In-Reply-To:Date:Cc:References:To; b=cQASD2OJSS0ORZttHUxk1fRpG0vShvKBTajSRPKioqvPSLav5cgPil+ubB9aLbhkQMU+diW z/WNyZ4y/1rBAAqmDGZpfwyxdR5KFAlQsIowrCHzGKZvYxXGFibSnPRKKCAvRe8wUz/Kmds2V WGtsCSqDZzYGyllfpkV/97jT5gZQaDZWJ4BFqOCypG+YphHDGMvqE4YEy+zR+UaCvZ6+Kc33P J4cM1ThFQfyJw6vznyzyAcKb+7/cMy84qPpA1/XXR01vmXlYv8jqwO7Wnhg+RJOyK7WYQkwJR 5/Klm7kSIC7Ef/QfpWAaAb7G0roFMCVpR6/DKc2owv6tzvstvWOQ== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from smtpclient.apple ([134.76.241.253]) by mail.gmx.net (mrgmx105 [212.227.17.168]) with ESMTPSA (Nemesis) id 1MA7KU-1qM4kj1dyE-00BZBD; Thu, 29 Jun 2023 16:32:27 +0200 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3696.120.41.1.3\)) From: Sebastian Moeller In-Reply-To: Date: Thu, 29 Jun 2023 16:32:25 +0200 Cc: "bloat@lists.bufferbloat.net" Content-Transfer-Encoding: quoted-printable Message-Id: References: To: "Livingood, Jason" X-Mailer: Apple Mail (2.3696.120.41.1.3) X-Provags-ID: V03:K1:dSzWFfysbOOK3WgehsSbDg7eUqsL2SOfAgXWMbVSZP/Q+PAK3eI 5Q05YcI9ZXJItXvjfcJxr80MnGkgWM3D+IpuWACy1wH+O3j2ezB4aLg9IEeT1vQDpL5GNzU Rhb0EuQ2NGbcGrYD0AEdTGe0s+nO+jYh4YJU3KUhe58p3LSL3y0wsoVzW+3FvZiG+a25wGg aK6PwBW1WSemSFj+f+bdw== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:MkM4YvhWAVU=;hA5yKIeA+IUs1Fa7NYEAnuO0ZgS hedFiUgeazexrsSSFZ33vsCznQ/+wQ9J8EafFSIUfnFYyJX0/ezZSlC9NUkW1ZG7cnHIGvAF2 ZshMWWK3rldyfw2LBCdph/AffB6aGVTFjsnhXBxd3Fry3KnxFGMHRe2HB+15N4SVSkQp09lnT L2rhq0TwkJkPm2pWalOB7l4P/d1Rsqg//YSRfy34DRQcYGC5rSl3n9ra71MwJLvQpKpdcxN37 hqrXD7gLje5Jr8aDzjNgjIk1CA8/NnSzmzAmYh22ac161rTLa5qcBjZpHl/sMvh0IaLBO4OWw qpntV4twiMvAvvzZWBf+HT1HkiBRkhiMSVE2P/iVVX0S5kTF45V/V4j4nOhBiwaw/V7olfjru TfD3exBhDSIXryJhdyEIVWVIrMPNJgTk1PHBbXhjgnOQWH9uDIHS5W2ZtqXlANQs/zIaATL9I CyvU+OW34ANRfw2XFqG6EzXtYNtMP1/p8YG7hT/0hMy3nAFLUsFTwTzTQzQF2lNDh0qeXUb2+ JXIFr9Gz2ERaKnk2uyhqe6brE6VmOrq23AqKaJINR7Yd/df51I9lIgqE6guP2vWPEFzmtQLgy 11bbIVA7RPGn38NRE/K7GYmO4gUHvv4wriHUFsjLpAJWWDAl/ksyQd1Ss8FWrTalo5lelu7Gw 1HyqaPVZa6lybQa5180Q+SQ8y0OWWEXpx4SvHkj1aiitfFvW7DYDOlEn+5rAhaqLqaCtM0Uoo LbduC9w0QbG381/CxierFXXHAOaMBLZ2S+5h60U+D5rVG9sih1oX6xQOMs8XxDQqnNtbI59F3 oJaIwIHcgqHPbFnyJ8KBpyyRtstnN4ytXKOGMrTL5mQSywkPij+nlm44So99Qcdh0iqj44/UG CTXd14lym07F4eqvoOlT6UC/7JHCYlorMVmfdHTiLfsvc7rbvt2nhdec9xy3VKJMqC3wR2bFY LOzJu8qNTdR5vgmR5pHGXBeI7VA= Subject: Re: [Bloat] Testing Offer - Comcast L4S Trials 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: Thu, 29 Jun 2023 14:32:34 -0000 While I have no test that I can volunteer, let alone a test that = supports L4S. I want to take the opportunity to share my tcpdump invocations that can = show ECN in action on the IP-level: # ECN: IPv4 tcpdump -i pppoe-wan -v -n 'ip and (ip[1] & 0x3) !=3D 0' # NOT Not-ECT tcpdump -i pppoe-wan -v -n 'ip and (ip[1] & 0x3) =3D=3D 0' # Not-ECT tcpdump -i pppoe-wan -v -n 'ip and (ip[1] & 0x3) =3D=3D 1' # ECT(1) tcpdump -i pppoe-wan -v -n 'ip and (ip[1] & 0x3) =3D=3D 2' # ECT(0) tcpdump -i pppoe-wan -v -n 'ip and (ip[1] & 0x3) =3D=3D 3' # CE # ECN: IPv6 tcpdump -i pppoe-wan -v -n 'ip6 and (ip6[0:2] & 0x30) >> 4 !=3D 0' # = NOT Not-ECT tcpdump -i pppoe-wan -v -n 'ip6 and (ip6[0:2] & 0x30) >> 4 =3D=3D 0' # = Not-ECT tcpdump -i pppoe-wan -v -n 'ip6 and (ip6[0:2] & 0x30) >> 4 =3D=3D 1' # = ECT(1) tcpdump -i pppoe-wan -v -n 'ip6 and (ip6[0:2] & 0x30) >> 4 =3D=3D 2' # = ECT(0) tcpdump -i pppoe-wan -v -n 'ip6 and (ip6[0:2] & 0x30) >> 4 =3D=3D 3' # = CE # ECN IPv4/6 tcpdump -i pppoe-wan -v -n '(ip6 and (ip6[0:2] & 0x30) >> 4 !=3D 0)' or = '(ip and (ip[1] & 0x3) !=3D 0)' # NOT Not-ECT tcpdump -i pppoe-wan -v -n '(ip6 and (ip6[0:2] & 0x30) >> 4 =3D=3D 1)' = or '(ip and (ip[1] & 0x3) =3D=3D 1)' # ECT(1) tcpdump -i pppoe-wan -v -n '(ip6 and (ip6[0:2] & 0x30) >> 4 =3D=3D 2)' = or '(ip and (ip[1] & 0x3) =3D=3D 2)' # ECT(0) tcpdump -i pppoe-wan -v -n '(ip6 and (ip6[0:2] & 0x30) >> 4 =3D=3D 3)' = or '(ip and (ip[1] & 0x3) =3D=3D 3)' # CE Just replace "-i pppoe-wan" with your own network interface of interest, = this seems to work on both recent inux and older macos (12.6.7). Before L4S roll-out the test for ECT(1) can be helpful to confirm that = there is no background ECT(1) usage that might (or might not) cause = issues with L4S. > On Jun 29, 2023, at 16:12, Livingood, Jason via Bloat = wrote: >=20 > As noted recently, we (Comcast) will soon begin L4S testing with = customers. We=E2=80=99re working on our test plans now. So my offer here = is to let me know if: > 1 =E2=80=93 You have test probes you=E2=80=99d like us to deploy. We = are working on a plan to send out (1) University of Chicago = NetMicroscope probes and (2) RIPE Atlas probes. > 2 =E2=80=93 You have web-based tests you=E2=80=99d like people to run, = or have one-click install client for Mac or Windows. (Most testers will = not be technical enough to run CLI-based tests, the the exception of the = Apple network responsiveness test.)=20 > =20 > Thx! If this is of interest, please ping me 1:1 off-list. > Jason > =20 > Current list > (1.a) Ookla web-based > (1.b) Ookla client > (1.c) M-Labs NDT > (1.d) Fastly web-based > (1.e) Netflix web-based > (1.f) Waveform web-based > (1.g) DSL Reports web-based=20 > (1.h) Apple Network Responsiveness test [SM] Not mine to offer, but I think speed.cloudflare.com also = might be interesting as it seems to follow the modern "let's not ignore = latency under load" paradigm as well as the translate the results into = terms suitable for casual users, while also reporting the hard numbers = for those interested.=20 What seems not available right now is a public test that can = selectively exercise both L4S queues independently. Regards Sebastian > =20 > _______________________________________________ > Bloat mailing list > Bloat@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/bloat