[arin-ppml] ARIN-prop-159 IPv6 Subsequent Allocations Utilization Requirement

Aaron Hughes aaronh at bind.com
Mon Nov 21 19:25:55 EST 2011

On Mon, Nov 21, 2011 at 02:24:05PM -0500, William Herrin wrote:
> On Mon, Nov 21, 2011 at 1:36 PM, ARIN <info at arin.net> wrote:
> > ARIN-prop-159 IPv6 Subsequent Allocations Utilization Requirement
> > Proposal Originator: Aaron Hughes
> > NRPM section 2.16 Utilized (IPv6)
> > 3. Tie down blocks shall be considered fully utilized, for the purpose of
> > subsequent allocations, when the first reassignment is made from the tie
> > down pool. (e.g. a /36 tie down for customer /48s will be considered
> > utilized for subsequent allocations once the first /48 is assigned from the
> > /36).
> Hi Aaron,
> I assume you mean topological aggregated customer entry points, where
> you want "tie down" customer assignments so they share a common route
> within your infrastructure. "Tie down" is not defined in the NRPM.

It would be good to define "Tie down" in the NRPM, and yes, I mean topological aggregated customer entry points, however, others may define this in more generic terms of groupings.

> Would you create an example scenario under current policy where an ISP
> has exhausted the IPv6 addresses for which it qualifies and can not
> get more due to a reasonable use of tie downs?

I did just send a couple in another reply to Scotts' e-mail, however, simply scenario would be:

- 10 regions of 1000 customers growing at 100 customers per year.
- Requested /32 for /36 tie downs per region
- Reserved 1 /36 for internal infrastructure
- Grew over time to 15 regions
- 1000+ /48s in each do not meet utilization of /36s
- How do I deploy my 16th+ region without resizing to non-nibbles?

> Is there any other way to resolve the problem? For example, if
> 6.5.3(b) was replaced with permitting an additional allocation in
> order to enlarge the ISPs holdings to what it could justify under
>, would that satisfy?

Possibly, however, "2.16. Utilized (IPv6)" seems to me would be very clear to anyone reading it and the obvious place to define utilization. :)

> Thanks,

Thank you sir.


> Bill Herrin
> -- 
> William D. Herrin ................ herrin at dirtside.com? bill at herrin.us
> 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
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Aaron Hughes 
aaronh at bind.com
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