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Wed, 20 Jun 2018 07:12:40 +0000 Received: from VI1PR07MB4254.eurprd07.prod.outlook.com ([fe80::2d37:3474:cf1e:b21c]) by VI1PR07MB4254.eurprd07.prod.outlook.com ([fe80::2d37:3474:cf1e:b21c%4]) with mapi id 15.20.0884.010; Wed, 20 Jun 2018 07:12:40 +0000 From: Kevin Darbyshire-Bryant To: Jonathan Morton CC: "valdis.kletnieks@vt.edu" , "cerowrt-devel@lists.bufferbloat.net" , bloat Thread-Topic: [Bloat] [Cerowrt-devel] Invisibility of bufferbloat and its remedies Thread-Index: AQHUCCcKTEaMcZ5pik6Mjk369j7Ra6Rou9aA Date: Wed, 20 Jun 2018 07:12:40 +0000 Message-ID: <86CE2EF6-D0D2-4384-8FC0-8B7EB20D05BA@darbyshire-bryant.me.uk> References: <1529339194.276412941@apps.rackspace.com> <1529361825.80979395@apps.rackspace.com> <145517.1529440447@turing-police.cc.vt.edu> In-Reply-To: Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=kevin@darbyshire-bryant.me.uk; x-originating-ip: [90.155.95.206] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1; 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boundary="Apple-Mail=_00BD3D9A-8305-4647-A24A-96F1D5B8F296"; protocol="application/pgp-signature"; micalg=pgp-sha256 MIME-Version: 1.0 X-OriginatorOrg: darbyshire-bryant.me.uk X-MS-Exchange-CrossTenant-Network-Message-Id: 1a1f64b0-5a4f-485f-1524-08d5d67d35eb X-MS-Exchange-CrossTenant-originalarrivaltime: 20 Jun 2018 07:12:40.5337 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 9151708b-c553-406f-8e56-694f435154a4 X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR07MB1552 Subject: Re: [Cerowrt-devel] [Bloat] Invisibility of bufferbloat and its remedies 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: Wed, 20 Jun 2018 07:12:44 -0000 --Apple-Mail=_00BD3D9A-8305-4647-A24A-96F1D5B8F296 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 > On 20 Jun 2018, at 00:41, Jonathan Morton = wrote: >=20 >> On 19 Jun, 2018, at 11:34 pm, valdis.kletnieks@vt.edu wrote: >>=20 >> Do we have a good cookbook on how to determine the set-rate? >=20 > On DSL, the sync rates in each direction should usually be readable = from the modem; they are typically reported on the router's status page. = The advertised rate is less reliable, to say the least. I=E2=80=99ve been experimenting with this hack in sqm-scripts to do just = that = https://github.com/ldir-EDB0/sqm-scripts/commit/a71ab1c9acd75d6e9254360e83= 2ac7b6f9514e88 originally on my parents DGN3500 and currently on my on = BT HomeHub5a test line. It fails to work if the ISP does rate banding (BT 20CN does this, BT = 21CN doesn=E2=80=99t) where downstream is limited to a rate below = downstream sync rate. I guess a lookup table could be implemented. Kevin --Apple-Mail=_00BD3D9A-8305-4647-A24A-96F1D5B8F296 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEASyssijGxT6XdZEjs6I4m53iM0oFAlsp/mcACgkQs6I4m53i M0q5nRAA3x2Gpm5lR6jMV+SLS22o9Wkt7PW1S2nI+WukZ0UYtnTwyMuec/r8/bBK ALmLRjdOOtlzlDeeULQsXZHnfCQnW60x6dYx5xQMnzX8SkFSrfGdtv9q/WXfMBE2 KfbZFEhwsSxNfe22qaxaoOsk4lt3y0e+K5fN8z0L2v0XguxDhSsrhfa+qdT0bBI4 Q0grICJ0SGBVcKBWsUu/RHT/LOboBEmyDrQu2nSqEuvzMXA86WrX4xttN4avhF4n scRT4rtgspm1A8Jg8D46e5j4QC45TSrxnFkhINwfHi2H3UebTL4K1o2XQBxw1rq4 YI2zgwmfGuSGbkFYeZ1I2M1HByn7mkKkU2Iteevkuefxr5QdkoPG4EFqV3HK9Off 6H+8Fqq6hrEHnynh9AL8pR/gYFHwQ3Pr9dYc3QrxDtKVbIeFYs6jBtkCVB4GI2tu l/+4XVi8exvU4YjlziKsRlaA3KI2T0P0guuDOELUdtjnflrO4zAl9nixJk+OlRnx 6rOEqFJv7d8FxdDt+Vk1uRD9VOg1xTYKd2P5OFp9ywEzpex6nrisBIWsFGHdTuD+ 8s1lI4L603N6VNUqSaWURo8cUu0uJxuutUytUtTo1PRl0ANiAvx0Px5YJc1Rjdt1 XWCjU5PcikMoa40LcA8daO+dgkz8QdWCc/6zPCvOiKPWM6wRe9Y= =viwN -----END PGP SIGNATURE----- --Apple-Mail=_00BD3D9A-8305-4647-A24A-96F1D5B8F296--