Re: IPv6 Anycast has been killed by LINUX patch in 2016 - who cares?
Tom Herbert <tom@herbertland.com> Sun, 08 August 2021 00:27 UTC
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References: <db8c1a5534e9412ebcfa37682d75f862@huawei.com> <C23D7023-B5B7-47C6-8AC5-65A98822A724@lurchi.franken.de> <CANMZLAZGawUjRhSSE_rA8AyqMx=mx1WFeJ_tZq0KVEXJd2XBfQ@mail.gmail.com> <20210807014730.GA28901@faui48f.informatik.uni-erlangen.de> <CAO42Z2yezZh5-B0PwCuNt2FUMAW-FjMK8QZ8uL4TsPhs26zziw@mail.gmail.com> <20210807151716.GA3098@faui48f.informatik.uni-erlangen.de> <CALZ3u+a_7XQ+R8mV+9KzwRwxa0riP-QD_2R69ycV0NL9jy_S3Q@mail.gmail.com> <20210807175410.GA63079@faui48f.informatik.uni-erlangen.de> <CALx6S36b33LD_hNFvptOJuny4g98=dhq3RtKsGeLx3ks-yYjFg@mail.gmail.com> <6F63D7FE-8768-4BD8-846E-61E50E44228F@lurchi.franken.de> <CALx6S36pbw2angEmDpu5DnX2nix9KgxFs7ExU17x+JXQFs23TA@mail.gmail.com> <CALZ3u+Yt2X3faSVW7K0eaxmaQy6iA6p4=f0c4E_F4CP0tfjHYw@mail.gmail.com> <CAOj+MMHu9wSuG87_vBaGNY0oU0kMu9KPFPAwcP9+eFviCMErPg@mail.gmail.com> <CALZ3u+YRfWspGYbFPQQyEGBxsS+0VhSAZq4MHWnWrMaW1HU-tQ@mail.gmail.com> <CAOj+MMF2Vr1LRin0WpBTM6UeRfi4FGQUpgp0SX4G2ftvtm23mA@mail.gmail.com> <CALZ3u+a_o8tTvBqRn2vQtrxMa8oZLA3oUgD8a_5ABg+FLPOqbg@mail.gmail.com>
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From: Tom Herbert <tom@herbertland.com>
Date: Sat, 07 Aug 2021 17:27:09 -0700
Message-ID: <CALx6S356wqZ-r0ORy20MLZ73nPjjK0GmQ8o0y4C8VQ4Az0+v8g@mail.gmail.com>
Subject: Re: IPv6 Anycast has been killed by LINUX patch in 2016 - who cares?
To: Töma Gavrichenkov <ximaera@gmail.com>
Cc: Robert Raszuk <robert@raszuk.net>, 6man WG <ipv6@ietf.org>, IETF discussion list <ietf@ietf.org>
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On Sat, Aug 7, 2021 at 4:53 PM Töma Gavrichenkov <ximaera@gmail.com> wrote: > > Peace, > > On Sun, Aug 8, 2021 at 2:47 AM Robert Raszuk <robert@raszuk.net> wrote: > > if someone uses anycast to establish long lasting TCP sessions (say 12h) - Good Luck ! > > Transport sessions cannot reliably last for 12 hours on the Internet. > That's the thing. Toma, Transport connections follow the end-to-end model. Transport state is maintained at the endpoints and not in the network, and hence as long as there remains a reachable path between the running end points the connection is viable. That is the fundamental architecture of the Internet. Reliability diminishes when the network is invasive in the transport layer and E2E model is not adhered to. > > An application should never rely on that. 12 minutes are already kind > of long, but 12 hours sound ridiculous. No application relies on connections being guaranteed to be viable for any specified amount of time, but that is not the same thing as saying that there aren't long lived connections that productively exist or that the network should proactively disallow long lived connections. If a connection is still useful after 12 hours, and everyone is happy, why tear it down and start over? > You can achieve that over multiple paths (MP-TCP was mentioned along > the thread) with some higher level abstraction (also subject to > eventually break) but that's it. > How does anycast work with Multipath TCP? Wouldn't each subflow potentially be routed to a different anycast host? Tom > This is the limitation. There's no way 'round it. > > -- > Töma
- 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