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

Töma Gavrichenkov <ximaera@gmail.com> Mon, 09 August 2021 17:07 UTC

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From: Töma Gavrichenkov <ximaera@gmail.com>
Date: Mon, 09 Aug 2021 20:07:06 +0300
Message-ID: <CALZ3u+bLVUZf1fTHQvAVzOnToiPcsXEyTNt56hNAXz4=-G5-6w@mail.gmail.com>
Subject: Re: IPv6 Anycast has been killed by LINUX patch in 2016 - who cares?
To: Phillip Hallam-Baker <phill@hallambaker.com>
Cc: Nick Hilliard <nick@foobar.org>, 6man WG <ipv6@ietf.org>, Theodore Ts'o <tytso@mit.edu>, IETF discussion list <ietf@ietf.org>
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Peace,

On Mon, Aug 9, 2021, 7:47 PM Phillip Hallam-Baker <phill@hallambaker.com>
wrote:

> 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.
>

a) they're not really the same people,

b) no one said that TCP works _perfectly_ over anycast per se, because it's
understood that perfectionism just doesn't belong in the area or
engineering.
What's been actually said is that it works just fine in a number of
applications, including almost every popular application, and these
applications use it this way on purpose,

c) also, the impact of IPv6 deployment and performance issues is perfectly
limited by the current poor scale of IPv6 deployment.
And, when the existing behaviour of applications working just fine in IPv4
breaks during transition to IPv6, that's not really going to speed the
transition up.

--
Töma

>

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