Re: [v6ops] [EXTERNAL] Re: Scope of Unique Local IPv6 Unicast Addresses (Fwd: New Version Notification for draft-gont-6man-ipv6-ula-scope-00.txt)

Fernando Gont <fgont@si6networks.com> Tue, 16 February 2021 20:57 UTC

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To: Gert Doering <gert@space.net>, Philip Homburg <pch-v6ops-9@u-1.phicoh.com>
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From: Fernando Gont <fgont@si6networks.com>
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Date: Tue, 16 Feb 2021 17:57:26 -0300
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Subject: Re: [v6ops] [EXTERNAL] Re: Scope of Unique Local IPv6 Unicast Addresses (Fwd: New Version Notification for draft-gont-6man-ipv6-ula-scope-00.txt)
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On 16/2/21 12:27, Gert Doering wrote:
> Hi,
> 
> On Tue, Feb 16, 2021 at 04:20:14PM +0100, Philip Homburg wrote:
>> With ULA, using the ULA as source address is not going to connect you the
>> wider IPv6 internet. NAT is unlikely. But there is a good chance that there
>> is another IPv6 address that can reach the rest of the internet.
> 
> I would not codify this.
> 
> Given the failure of dual-GUA multihoming, I expect to see quite a bit
> of ULA + double-NPT6 multihoming in the not-so-far-future.
> 
> (And yes, it pains me, and I'm happy to be proven wrong.  But my gut
> has lots of experience now with "will people use this perfect solution
> which is only 80% implemented yet" vs "will they do something that smells
> bad, but works right away"...)

You are being overly optimistic. At least multi-prefix/multi-router IPv6 
networking is rather.... *broken*.

Unless I've missed any recent widespread implementation and deployment 
of RFC8028...

Thanks,
-- 
Fernando Gont
SI6 Networks
e-mail: fgont@si6networks.com
PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492