[arin-ppml] Draft Policy ARIN-2012-2: IPv6 Subsequent Allocations Utilization Requirement - revised

Chris Grundemann cgrundemann at gmail.com
Mon Oct 1 16:52:25 EDT 2012

On Mon, Oct 1, 2012 at 1:49 PM, Owen DeLong <owen at delong.com> wrote:
> On Oct 1, 2012, at 09:46 , Chris Grundemann <cgrundemann at gmail.com> wrote:
>> On Mon, Oct 1, 2012 at 10:19 AM, Owen DeLong <owen at delong.com> wrote:
>>> It means that at least one serving site has enough end-site assignments to justify the size of the serving site blocks.
>> Sure, but how many is that?
> As specified in the original policy... enough such that the next lower nibble boundary would not leave a 25% minfree.

OK, so as an example (to ensure we are on the same page); let's say I
split MyISP into 11 regions (11 serving sites) and my largest serving
site has 200 subscribers today.

So under current initial allocation policy:
Since 200 > 192 (75% of 256), I jump from a /40 for each serving site to a /36.
Since 11 < 12 (75% of 16), I only bump one nibble and receive a /32 from ARIN.

Now, let's say I decide (or hire a new architect/engineer who decides)
that I screwed up and really need 15 serving sites (regions) in my
network. I split the network up but leave the largest serving site
intact (no change = 200 subs).

Under this new/proposed criteria:
Since 15 > 14.4 (90% of 16), MyISP gets the next largest nibble from
ARIN, a /28.
Since my largest site has 200 subs, I have a maximum of 3,000 subs
total but I now have over 1 million /48s.
That puts me at less than 0.3% utilization of /48s.

Is that about right?

> Owen


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