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Re: IPv6 Anycast has been killed by LINUX patch in 2016 - who cares?

Töma Gavrichenkov <ximaera@gmail.com> Sun, 08 August 2021 01:09 UTC

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From: Töma Gavrichenkov <ximaera@gmail.com>
Date: Sun, 08 Aug 2021 04:09:20 +0300
Message-ID: <CALZ3u+ZRG5rTtTGKhm7spzwqwp18fJxJpp_XN_tjQ=cMJ-GPNw@mail.gmail.com>
Subject: Re: IPv6 Anycast has been killed by LINUX patch in 2016 - who cares?
To: Tom Herbert <tom@herbertland.com>
Cc: Robert Raszuk <robert@raszuk.net>, 6man WG <ipv6@ietf.org>, IETF discussion list <ietf@ietf.org>
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Peace,

On Sun, Aug 8, 2021 at 3:27 AM Tom Herbert <tom@herbertland.com> wrote:
> Transport connections follow the end-to-end model. Transport state is
> maintained at the endpoints and not in the network

Ideally, yes, this is what we have IPv6 for: to eliminate NAT which is
the (part of the) transport state maintained in the network.


> If a connection is still useful after 12 hours, and everyone is happy,
> why tear it down and start over?

Yep, no need, why?
You just need to be prepared that it would eventually break.


> How does anycast work with Multipath TCP? Wouldn't each subflow
> potentially be routed to a different anycast host?

Depends on the architecture of the application.  Might work well, or
might not work.

--
Töma

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