[arin-ppml] Update on ARIN Policy 2025-8 Reserve 4.10 Space for In-Region Use

[David Farmer]

On Sun, Dec 14, 2025 at 4:29 PM William Herrin <bill at herrin.us> wrote:

> On Sun, Dec 14, 2025 at 10:34 AM David Farmer via ARIN-PPML
> <arin-ppml at arin.net> wrote:
> > 1. Someone with an ARIN IPv6 allocation that they are using globally,
> according to section 9, Out of Region Use, should also be able to use their
> 4.10 allocation to provide NAT64 for their IPv6 allocation. The current
> language prevents this because it involves a potential IPv6 deployment
> outside the ARIN service area.
> >
> > I recommend adding a new bullet point to section 4.10, as illustrated
> below.
> >
> > Allocations made under this policy must be used only to support IPv6
> allocations made by ARIN.
> > Further, the use of the allocation must be concurrent and congruent with
> these IPv6 allocations.
>
> > This bullet aims to allow #1 and disallow #2 and #3 from the list above.
>
> Hi David,
>
> Did you intend for #1 to allow employing the 4.10 IPv4 space at
> locations outside the ARIN region if ARIN-allocated IPv6 addresses are
> being used there? So that as long as the IPv6 addresses are from ARIN
> they can get 4.10 space for as many GLOBAL locations as a registrant
> wants?
>
> To the best of my understanding, ARIN doesn't have much in the way of
> proscriptions against using ARIN IPv6 allocations outside the region.
> From what I read in section 9, they basically have to have a legal
> existence in the ARIN region and deploy at least a /44 there.
>
> Regards,
> Bill Herrin
>

Yes, that is generally the idea. Except it is not as many as they want, it
is as many as they qualify for under 4.10, which is fairly limited.

If an organization deploys their ARIN IPv6 allocation globally and doesn't
have any allocations from other RIRs, as many organizations do.  Why should
they have to get an IPv4 allocation from another RIR to support the
deployment of their ARIN IPv6 allocation beyond the borders of the ARIN
service region as they are entitled to do under section 9?

If we don't allow #1 then we should allow #2. Because then we are expecting
other RIRs to allocate IPv4 for use with an ARIN IPv6 allocation within
their service regions. Therefore we should do the reciprocal and allow
other RIR allocations for justification with 4.10.

I prefer restricting 4.10 to support only ARIN IPv6 allocation, including
their use outside the ARIN service region per section 9.

Thanks

-- 
===============================================
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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