[arin-ppml] Draft Policy ARIN-2024-8: Restrict the Largest Initial IPv6 Allocation to /20

[David Farmer]

On Fri, Jun 28, 2024 at 10:01 AM William Herrin <bill at herrin.us> wrote:

> On Thu, Jun 27, 2024 at 4:17 PM David Farmer <farmer at umn.edu> wrote:
> > On Thu, Jun 27, 2024 at 5:04 PM William Herrin <bill at herrin.us> wrote:
> >> we know a /16 has been allocated. We can't know how they justified it
> >> because that information is private. Can you produce a -notional-
> >> justification for a /16 that we all agree is -reasonable-?
> >
> > The current policy has been in effect since ARIN-2011-3 was
> implemented[..]
>
> Yes, yes, only one registrant has thus far had the chutzpah to seek
> and acquire a /16. I have already acknowledged the truth of that
> claim; you need not continue repeating it.
>
> Perhaps you could stop deflecting the question I asked you in return:
> Do you, David Farmer, believe there exists a justification for an
> *initial* allocation of a /16 of IPv6 addresses which would withstand
> public scrutiny? An allocation to an organization which has never
> before held ARIN IPv6 addresses. If you do, would you care to offer us
> such a hypothetical to examine?
>

I considered this question back in 2011 when the question of /16 or /20
came up in the discussion of ARIN-2011-3. I concluded it was possible to
justify a /16. Let me put the question slightly differently: Is it possible
to justify more than a /20? There were already /19s allocated by other
RIRs, so I concluded that it is possible to justify more than a /20. I also
believe nibble alignment is important, so I support /16 as the maximum
allocation. Nevertheless, such /16 allocation should be rare; one in a
decade aligns with that belief.

However, those who think it is impossible to justify a /16 for an initial
allocation should support this policy.

Thanks.

-- 
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David Farmer               Email:farmer at umn.edu
Networking & Telecommunication Services
Office of Information Technology
University of Minnesota
2218 University Ave SE        Phone: 612-626-0815
Minneapolis, MN 55414-3029   Cell: 612-812-9952
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