[arin-ppml] Initial ISP Allocation Policy

Alexander, Daniel Daniel_Alexander at Cable.Comcast.com
Mon Jul 22 15:08:12 EDT 2013

Hello Bill,

Here is my understanding of the factors I took into consideration
regarding the minimum settings.

* AFRINIC and LACNIC currently have a /22 minimum with no SH/MH
* RIPE NCC has a /22 minimum, which also happens to be their maximum as
they are in their last /8 policy phase. As I understand it, a /21 minimum
would apply to a transfer.
* APNIC has a /24 minimum with a /22 maximum as part of their depletion
phase policies. The /24 minimum would apply to transfers without a SH/MH
* Existing aggregated blocks can already be broken down to /24's through
the Inter-RIR transfer policy regardless of whether they are SH or MH.
* The impact in the ARIN region would be the number of single-homed
organizations who could qualify for a /22, but cannot qualify for a /20,
and are willing to add the additional financial obligation of being an
ARIN Org and possibly having to pay for a transfer.

The question that comes to mind is whether this change would have a
scalable impact on the existing, estimated, 450K routes already in the
table? My sense is that it would not which is how I got to the draft

Dan Alexander
Speaking only for myself

On 7/22/13 1:39 PM, "William Herrin" <bill at herrin.us> wrote:

>On Sun, Jul 21, 2013 at 11:33 PM, Alexander, Daniel
><Daniel_Alexander at cable.comcast.com> wrote:
>> * Minimum allocation for a single-homed ISP is reduced from a /20 to
>> * Minimum assignments for a single-homed end user is reduced from a /20
>> a /22.
>Hi Daniel,
>I strongly disagree with these two proposed changes. There is no
>technical penalty for allowing multihomed registrants to get their
>addresses directly from ARIN: their routes will be present in the BGP
>table regardless of where they get the addresses. This is not true of
>single-homed end users who would generally not have a presence in the
>BGP table unless they get their addresses from the RIR.
>As we've discussed principles in recent weeks, we have broad agreement
>that it's ARIN's job to make scalable routing possible. Right now,
>that means having single-homed users get their numbers from their
>upstream. The changes would run counter without apparent gain in one
>of the other areas discussed as candidate principles.
>Bill Herrin
>William D. Herrin ................ herrin at dirtside.com  bill at herrin.us
>3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
>Falls Church, VA 22042-3004

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