From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.gmx.net (mout.gmx.net [212.227.15.19]) (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 AB8FC3CB40 for ; Fri, 6 Nov 2020 12:05:51 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1604682346; bh=fCkOh8hMac85XT8PFHNeKNzNydh0jAyVu73DWzMu0L4=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date:In-Reply-To:References; b=GM2FLlAWJkwbIwHTJUSsDiYUgZZr5f+cZUd/4KdJ7lcEp2E91/jg1g8An1Sk21cv2 jT59wzfB9i06CB5HL/C19KhbAyq/xEOK9WONgHKKkUaJG9khaAEGgUWPNRUWAHJW0L NtFekm51VqWyxNopwbs1tfR4BslEKPUF3a3ePw/Q= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from [134.76.241.253] ([134.76.241.253]) by web-mail.gmx.net (3c-app-gmx-bs15.server.lan [172.19.170.67]) (via HTTP); Fri, 6 Nov 2020 18:05:46 +0100 MIME-Version: 1.0 Message-ID: From: Sebastian Moeller To: toke@toke.dk Cc: Stephen Hemminger , =?UTF-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen_via_Bloat?= Content-Type: text/plain; charset=UTF-8 Date: Fri, 6 Nov 2020 18:05:46 +0100 Importance: normal Sensitivity: Normal In-Reply-To: <87k0uyfojb.fsf@toke.dk> References: <87mtzwt47a.fsf@toke.dk> <87wnyzswy9.fsf@toke.dk> <87h7q3solo.fsf@toke.dk> <20201106080352.415568f8@hermes.local> <87k0uyfojb.fsf@toke.dk> Content-Transfer-Encoding: quoted-printable X-UI-Message-Type: mail X-Priority: 3 X-Provags-ID: V03:K1:XlpeLP7uJJor9WlDPbMhhhq/Q7LNNVCqTN6B4nkXasJHM/oLcOZubz4ejZH9+US3MwURX WR906/CDItjvPkUVkKOrynQE+B8e9C/oSz/7/U9lBE9JLhEmpvUnsIIjt0wztSKlu98/XGevuaPT gV13eJN5lwJgceMUhthFsVKeYCyXOq2rgEiOKVL0F97K894Ba1sbTLPAnfMMemv0Sgkn9CE8Vrk3 MG6u2LAHlZ3Ndgt2LubdgE7o/XpsDRHlGoeCaGl7PnLzEJYloTBUpB8drif2IGPYNq6gb3P5zpYp Sw= X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:LtZmP43vahI=:wa61npyDsNofjOpJ1CUz2Q IvxDPmRX5KxZVJJlAlEOl0pnYJ2kLUkgFa0P4SWJIm0P5LavOYQYy9dqEj7Jax/HUl7gy8QI2 ssExgMYIObvW6CFSbEgbNc76qJPdbqRhaIyvP9SD2aMiso/+bSxeqRtXzAgWpb3w89D0gNLnO zYT9lVNG9HDJQAUdtNTzCN1WLHTsHSVGw5iOeUzar3I2TEMjKR3Xnf1Q5e+zI/+gGmvpiWnAH ToU6xTAVTD3dBPTeeSxQ5ZhNHTLSBYqXaI9ilKYAbYQayDMcQE6a2Io7/d/VimC9SClxKI8ja Kc9RjMjwKxTdQV7ybP5BKS5ncfFQk+ltK2pIu9E7JrPp+r1d28P06dk7ZNeXCLk04NMtOYmFf uJeNXi0oYIP1zIfNS+kBgSYi5TnE3enU5pYbRooPzV6jjKlN6OOELgU7Xk9W0Spc4+nYnD5ul ueoSaivnDOI6EtAn0XSfu/MAPFkieMQpE+jYwJdxQauj/4DRssZR9vm5oIqeft+CxSSNrKb5M s3YwtUkGNOWz1PtIQrkp7H62Erm46JuV/cau8eIoS4tMCZtQajDyzNlRSJxw1vHDXF5/5jskc CLyf/YXaqmbpw= Subject: Re: [Bloat] Comparing bufferbloat tests (was: We built a new bufferbloat test and keen for feedback) 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: Fri, 06 Nov 2020 17:05:52 -0000 Hi Toke, > Gesendet: Freitag, 06=2E November 2020 um 17:17 Uhr > Von: "Toke H=C3=B8iland-J=C3=B8rgensen via Bloat" > An: "Stephen Hemminger" , "Toke H=C3=B8ila= nd-J=C3=B8rgensen via Bloat" > Betreff: Re: [Bloat] Comparing bufferbloat tests (was: We built a new bu= fferbloat test and keen for feedback) > > Stephen Hemminger writes: >=20 > > PS: Why to US providers have such asymmetric bandwidth? Getting someth= ing symmetric > > requires going to a $$$ business rate=2E >=20 > For Cable, the DOCSIS standard is asymmetric by design, but not *that* > asymmetric=2E=20 Unfortunately is is that bad: DOCSIS 3=2E0 Downstream 108 MHz to 10= 02 MHz Upstream 30 MHz to 85 MHz, so (1002-108)/(85-30) 16:1, but not all c= able co, have matching upstream filters for 85MHz=2E Then again, the two AC= K per two full segment rule puts a lower end in, with what an ISP can get a= way, if the customer is expected to at least see the downstream rate in spe= edtests, I can never remember whether that is essentially 20:1 or 40:1, but= since then GRO?GSO and friends, as well as ACK filtering has reduced the A= CK traffic somewhat=2E=2E=2E > I *think* the rest is because providers have to assign > channels independently for upstream and downstream, and if they just > assign them all to downstream they can advertise a bigger number=2E=2E= =2E They wished, once they deploy upstream amplifiers these have a fixe= d frequency split and need to be replaced if the spilt is changed, that get= s expensive quickly=2E=2E=2E or so I have heard=2E Best Regards Sebastian >=20 > -Toke > _______________________________________________ > Bloat mailing list > Bloat@lists=2Ebufferbloat=2Enet > https://lists=2Ebufferbloat=2Enet/listinfo/bloat >