+1 to ULA should go extinct. Why do they even exist? How have they helped
global native IPv6 adoption (without NAT66/NPTv6)?

+1 to GUA being the default standard if IPv6 is called into play.

+1 to using GUA on "private" networks – future-proofed with GUA for future
*inter*connectivity*.*

+1 to IPv6 being about the number of networks (/64s) and not the number of
"hosts"; the latter is, without a doubt, IPv4-centric.

*--*
Best Regards
Daryll Swer
Website: daryllswer.com
<https://l.shortlink.es/l/a1abea4cf890b4fe45d3ca3253ffe607875c37ed?u=2153471>


On Mon, 29 Jun 2026 at 23:16, John Osmon <[email protected]> wrote:

> > Current qualifications for ARIN to assign an IPv6 /48 block for
> > off-Internet use is roughly:
> >
> > 1. Have 2000 hosts, or
> > 2. Submit a network plan explaining why ULA addresses are not good
> enough.
> >
> > More than a single /48 requires multiple sites and the above.
>
> When using IPv6 the trend has been to discourage counting hosts, but
> rather counting networks.  Is it too much to ask the policy to start
> drifting in the direction?
>
>
> > There's more nuance and some corner cases (see NRPM 6.5.8), but that's
> > the general shape of it.
>
> Some of the explanatory notes in 6.5.8.1 seem to reinforce the 2000
> hosts idea, but also has a couple of important "loopholes" that make
> justification easy if your network needs unique addresses.  (This is a
> GOOD THING in my eyes.)
>
>
> > Is that about right for what the policy should be? Should the rules be
> > more restrictive? Less? Where would you set them and why?
>
> I think unique addressing is important, so I'd set the rules pretty
> loose.
>
> We could plan to re-evaluate when allocation of 2003::/3 hits something
> like 25% and 50%?
>
>
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