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

Mark Andrews <marka@isc.org> Thu, 07 January 2021 07:38 UTC

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From: Mark Andrews <marka@isc.org>
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Date: Thu, 7 Jan 2021 18:38:12 +1100
Cc: Richard Patterson <richard@helix.net.nz>, Philip Homburg <pch-ipv6-ietf-7@u-1.phicoh.com>, IPv6 Operations <v6ops@ietf.org>, 6man WG <ipv6@ietf.org>
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References: <160989494094.6024.7402128068704112703@ietfa.amsl.com> <6fe3a45e-de65-9f88-808d-ea7e2abdcd16@si6networks.com> <m1kx98E-0000EhC@stereo.hq.phicoh.net> <b53b5d62-0334-f791-f56a-f2122767ecdb@si6networks.com> <m1kxAVC-0000KhC@stereo.hq.phicoh.net> <CAHL_VyD85e9=taY1XENf7hc=BXRyD_7JJFDCW2Oq_a0z3hYqUA@mail.gmail.com> <bc29edad-b57b-bb53-141b-8f58c5ca2526@si6networks.com>
To: Fernando Gont <fgont@si6networks.com>
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Subject: Re: [v6ops] 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 7 Jan 2021, at 02:45, Fernando Gont <fgont@si6networks.com> wrote:
> 
> On 6/1/21 12:29, Richard Patterson wrote:
>> On Wed, 6 Jan 2021 at 15:14, Philip Homburg <pch-ipv6-ietf-7@u-1.phicoh.com <mailto:pch-ipv6-ietf-7@u-1.phicoh.com>> wrote:
>>    Applications should not do widely different things if they encouter
>>    a ULA.
>> But they do.
> 
> And good for them that they do. The ones that don't are the ones that end up e.g. posting ULAs and link-locals on the public-facing DNS.

Really AAAA records need to be replaced with something that identifies the zone the IPv6 address is applicable to.
A 128bit followed by a domain name would work.  System would need to which domain names where applicable to which links.  I would expect the could be done with a RA option.

e.g.
	www.andrews.example.id.au. SA 2001:DB8::1c59:17c:a2ce:e9ee .
	www.andrews.example.id.au. SA fd37:287a:df67::1 dv.andrews.example.id.au.
        www.andrews.example.id.au. SA fe80::14f4:ff53:6bfa:960b link1.dv.andrews.example.id.au.
	www.andrews.example.id.au. SA ::ffff:10.0.0.1 dv.andrews.example.id.au.

The above has global, ULA, link-local and RFC 1918 addresses for a fictional web server.  

> (I've had to do it myself when using dynamic DNS updates, for instance)
> 
> Cheers,
> -- 
> Fernando Gont
> SI6 Networks
> e-mail: fgont@si6networks.com
> PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492
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> 
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-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742              INTERNET: marka@isc.org