Re: IPv6 Anycast has been killed by LINUX patch in 2016 - who cares?
Phillip Hallam-Baker <phill@hallambaker.com> Mon, 09 August 2021 16:47 UTC
Return-Path: <hallam@gmail.com>
X-Original-To: ipv6@ietfa.amsl.com
Delivered-To: ipv6@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 575753A0A1F; Mon, 9 Aug 2021 09:47:12 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.649
X-Spam-Level:
X-Spam-Status: No, score=-1.649 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FREEMAIL_FORGED_FROMDOMAIN=0.249, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.001, HTML_MESSAGE=0.001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=no autolearn_force=no
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id InOT2LcNTISQ; Mon, 9 Aug 2021 09:47:10 -0700 (PDT)
Received: from mail-yb1-f172.google.com (mail-yb1-f172.google.com [209.85.219.172]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 8A6983A0A1D; Mon, 9 Aug 2021 09:47:10 -0700 (PDT)
Received: by mail-yb1-f172.google.com with SMTP id m193so30730085ybf.9; Mon, 09 Aug 2021 09:47:10 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=Ll8S52c/WViGHWNB6JtMW5JXT49A1uqVqZIkqZ2Cbg4=; b=tHfv7DbuQ3AFVJEILewvy86zrCoL8O7/2oybvBioMrdJ0b9+mWzipmCvj5Pa0fXECh xC2RM2wid+NBMAaBrwslPFPzIrlPZTvMO7LSMNROqt4Gp5YdsB6V5W9a3pY97CgJGPMn t9AAlh4KMO0Ogoj+2K8qVGizyMFKdCzFxnTMY3G70IV/qTi/3kbGFZckJx1NOU9J2Wn0 mYsIMuQJPnbfUHDjCDixT9Y2QTRyInXDmQ8FvgVgZkaCJuoJdtndfCsT9PXshydo2w76 3pR2bv8FMxKDo2YF2JBlw39PAlhkNYe2HKshiggfbugjZmDNlVuJlG1w4bvjFMbiLji1 uQRw==
X-Gm-Message-State: AOAM530/ldlHKAdFCM0iNvO8kXTVSb+Sc8/pRCSLAx/ja6P+v+8KRn79 cLJnOgIN6QLMqgDvd0Z66ts3P9kmAMROO6jLjkU=
X-Google-Smtp-Source: ABdhPJym9gniyIQ76Xutt/cqsKRT6MYYKQbksrDEuZ3Y4c5bm28OkccUXvyak5no0GDip8G7Xnjcu6K+w2aeri5GJXQ=
X-Received: by 2002:a25:e60a:: with SMTP id d10mr30958161ybh.56.1628527629533; Mon, 09 Aug 2021 09:47:09 -0700 (PDT)
MIME-Version: 1.0
References: <CALx6S36pbw2angEmDpu5DnX2nix9KgxFs7ExU17x+JXQFs23TA@mail.gmail.com> <CALZ3u+Yt2X3faSVW7K0eaxmaQy6iA6p4=f0c4E_F4CP0tfjHYw@mail.gmail.com> <CALx6S343sL0=5wUTRSXMnhSamjTTZU=DzA9Y+dbJ4NRTu0_83w@mail.gmail.com> <CALZ3u+ad6Cecp4T+wfuKVJ4ZmnQvaCSX2njFPCN8DuctrU6uew@mail.gmail.com> <CALx6S37u=y1wX8+6d8aX-6=N1MFEqO9RwxQN5zhZnS4DLM8DcA@mail.gmail.com> <CALZ3u+bHbsdzQsHOHx-6nEe6yQBbHMDhH9_PWB=WHTchB8tj5w@mail.gmail.com> <CALx6S36MpCOh2mR+cfM__ASTdn9c4CuhxUrCnUgEv1WhORLyRg@mail.gmail.com> <CALZ3u+ZyQKUJc__HWu6drNyLSCJJ8bOsLfg1B18xwB9+HMe8GA@mail.gmail.com> <CALx6S366bXkCsyEkWCONBX5kcB9JzHU=aNF9hd+wT9FcTdShFw@mail.gmail.com> <CALZ3u+aP=v_1=w1xqfEKof7Cc6Ba3pwOYV3O=0b=NxS4hRWhiA@mail.gmail.com> <YRBdZrKV+MrrhUCG@mit.edu> <CALZ3u+aBdE3Bw3_ry+CuV4tS016c4mWewJFpr0aCbBnwj70Vzg@mail.gmail.com> <a3833e04-c123-ef52-95f9-cae80a1390e7@foobar.org>
In-Reply-To: <a3833e04-c123-ef52-95f9-cae80a1390e7@foobar.org>
From: Phillip Hallam-Baker <phill@hallambaker.com>
Date: Mon, 09 Aug 2021 12:46:56 -0400
Message-ID: <CAMm+LwiAbiK618+kY9JTLr7_mQd-E5TKyNsGqOLrGQoLzjJo=A@mail.gmail.com>
Subject: Re: IPv6 Anycast has been killed by LINUX patch in 2016 - who cares?
To: Nick Hilliard <nick@foobar.org>
Cc: Töma Gavrichenkov <ximaera@gmail.com>, 6man WG <ipv6@ietf.org>, Theodore Ts'o <tytso@mit.edu>, IETF discussion list <ietf@ietf.org>
Content-Type: multipart/alternative; boundary="000000000000dd860c05c923220f"
Archived-At: <https://mailarchive.ietf.org/arch/msg/ipv6/GC4A3yx4qee5DqDe5IvGbGtG7Fg>
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "IPv6 Maintenance Working Group \(6man\)" <ipv6.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ipv6>, <mailto:ipv6-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ipv6/>
List-Post: <mailto:ipv6@ietf.org>
List-Help: <mailto:ipv6-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ipv6>, <mailto:ipv6-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 09 Aug 2021 16:47:13 -0000
We have people vigorously asserting that Linux broke IPv6 TCP over Anycast five years ago and this is serious. And We have people vigorously asserting that TCP over Anycast works absolutely perfectly and there are no issues. And they are the same people. It cannot work and not work at the same time. As a user, I find that a lot of the commercial systems I end up having to use are considerably less reliable than they should be. Running a real time trading desktop over a 1Gbs pipe to a big name brokerage is not 100% reliable which is rather surprising. What I am objecting to here is the assumption that people can make use of some undocumented feature that was never guaranteed to work and then insist that the rest of the Internet maintain that feature in perpetuity. Nope, does not work that way because however important your application is to YOU, it is almost certainly not important to ME. The core assumption of the Internet is that the narrow waist is an unreliable transport which makes no guarantees. That is why TCP exists in the first place. Like BitCoin, deployment of TCP turns out to be immutable. Whatever clever features people might think they can add, they cannot because TCP is a platform feature and requires deep operating system voodoo to change. So if you want your applications to work, you need to think about moving away from TCP to a modern transport over UDP that takes account of the additional capabilities and features of the network as deployed. I would not design a DDoS resistant transport over IPv6 the same way as over IPv4. What a waste! With 128 bits of addressing, why on earth give everyone the same target IP address at the discovery layer??? Of course I am going to be mixing it up. What this discussion is doing that is useful is surfacing some of the operational assumptions that are not supported in the infrastructure but relied on by real installations. We will never have an exhaustive set of such assumptions. At the end of the day, there are two operational arguments that invariably turn out to be false: 1) This change I am proposing to the infrastructure is so important it MUST be deployed. 2) This feature I rely on is so important it MUST NOT ever change. What is really strange is that these arguments seem to be the ones most commonly made in BOFs and WG kickoffs. We have 30 years of experience telling us that both are false but they still come up, over and over again. Making a protocol dependent on deployment of a new DNS record is a really good way to make sure it will never see deployment and I speak as the author of the only new DNS record to be successfully deployed since SRV (nope, TLSA still not in C-Panel, most people can't use it, take a look at the business model and you will see why that isn't happening). Making a protocol dependent on TCP fast start was another wrecking choice. The list goes on. An internetwork is not the same thing as a network. tThe IETF is not the administrator of the internetwork because the distinctive feature of an Internetwork is that there is no administrator.
- Re: IPv6 Anycast has been killed by LINUX patch i… Toerless Eckert
- Re: IPv6 Anycast has been killed by LINUX patch i… Mark Smith
- Re: IPv6 Anycast has been killed by LINUX patch i… Jeff Tantsura
- Re: IPv6 Anycast has been killed by LINUX patch i… Mark Smith
- Re: IPv6 Anycast has been killed by LINUX patch i… Toerless Eckert
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Toerless Eckert
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Tom Herbert
- Re: IPv6 Anycast has been killed by LINUX patch i… Brian E Carpenter
- Re: IPv6 Anycast has been killed by LINUX patch i… Michael Tuexen
- Re: IPv6 Anycast has been killed by LINUX patch i… Tom Herbert
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Robert Raszuk
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Robert Raszuk
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Robert Raszuk
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Tom Herbert
- Re: IPv6 Anycast has been killed by LINUX patch i… Tom Herbert
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Tom Herbert
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Robert Raszuk
- Re: IPv6 Anycast has been killed by LINUX patch i… Simon Hobson
- Re: IPv6 Anycast has been killed by LINUX patch i… Tom Herbert
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Tom Herbert
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… David Farmer
- Re: IPv6 Anycast has been killed by LINUX patch i… Tom Herbert
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Theodore Ts'o
- Re: IPv6 Anycast has been killed by LINUX patch i… Nick Hilliard
- Re: IPv6 Anycast has been killed by LINUX patch i… Brian E Carpenter
- Re: IPv6 Anycast has been killed by LINUX patch i… Tom Herbert
- Re: IPv6 Anycast has been killed by LINUX patch i… Tom Herbert
- Re: IPv6 Anycast has been killed by LINUX patch i… Jen Linkova
- Re: IPv6 Anycast has been killed by LINUX patch i… Patrik Fältström
- Re: IPv6 Anycast has been killed by LINUX patch i… Ole Troan
- Re: IPv6 Anycast has been killed by LINUX patch i… Patrik Fältström
- RE: IPv6 Anycast has been killed by LINUX patch i… Vasilenko Eduard
- RE: IPv6 Anycast has been killed by LINUX patch i… Vasilenko Eduard
- Re: IPv6 Anycast has been killed by LINUX patch i… Michael Tuexen
- Re: IPv6 Anycast has been killed by LINUX patch i… Michael Tuexen
- Re: IPv6 Anycast has been killed by LINUX patch i… Brian Carpenter
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Nick Hilliard
- Re: IPv6 Anycast has been killed by LINUX patch i… Templin (US), Fred L
- Re: IPv6 Anycast has been killed by LINUX patch i… Phillip Hallam-Baker
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- Re: IPv6 Anycast has been killed by LINUX patch i… Warren Kumari
- Re: IPv6 Anycast has been killed by LINUX patch i… Tom Herbert
- RE: IPv6 Anycast has been killed by LINUX patch i… Vasilenko Eduard
- Re: IPv6 Anycast has been killed by LINUX patch i… Tom Herbert
- Re: IPv6 Anycast has been killed by LINUX patch i… Phillip Hallam-Baker
- Re: IPv6 Anycast has been killed by LINUX patch i… Phillip Hallam-Baker
- Re: IPv6 Anycast has been killed by LINUX patch i… Warren Kumari
- Re: IPv6 Anycast has been killed by LINUX patch i… Christian Huitema
- Re: IPv6 Anycast has been killed by LINUX patch i… Robert Raszuk
- Re: IPv6 Anycast has been killed by LINUX patch i… Warren Kumari
- Re: IPv6 Anycast has been killed by LINUX patch i… Warren Kumari
- Re: IPv6 Anycast has been killed by LINUX patch i… Theodore Ts'o
- Re: IPv6 Anycast has been killed by LINUX patch i… Gyan Mishra
- RE: IPv6 Anycast has been killed by LINUX patch i… Vasilenko Eduard
- Re: IPv6 Anycast has been killed by LINUX patch i… Töma Gavrichenkov
- RE: IPv6 Anycast has been killed by LINUX patch i… Vasilenko Eduard
- Re: IPv6 Anycast has been killed by LINUX patch i… Gyan Mishra
- RE: IPv6 Anycast has been killed by LINUX patch i… Vasilenko Eduard
- Re: IPv6 Anycast has been killed by LINUX patch i… Gyan Mishra
- RE: IPv6 Anycast has been killed by LINUX patch i… Vasilenko Eduard
- Re: IPv6 Anycast has been killed by LINUX patch i… Gyan Mishra
- Driver for SRV6 [Re: IPv6 Anycast has been killed… Brian E Carpenter
- Re: Driver for SRV6 [Re: IPv6 Anycast has been ki… Gyan Mishra
- RE: Driver for SRV6 [Re: IPv6 Anycast has been ki… Vasilenko Eduard
- Re: Driver for SRV6 [Re: IPv6 Anycast has been ki… Stefano Salsano
- RE: Driver for SRV6 [Re: IPv6 Anycast has been ki… Vasilenko Eduard
- Re: Driver for SRV6 [Re: IPv6 Anycast has been ki… Gyan Mishra