[arin-ppml] ARIN-prop-162

[David Farmer]

As AC shepherd for both ARIN-prop-161 and ARIN-prop-162, and looking at 
the communities comments for both proposals, I see the following issues 
that needed to be addressed in a revision of the text;

> CJ Aronson - "this says you're changing from "request up to a 3-month supply of IP addresses." to "request up to three month supply of IP addresses." It doesn't seem to change the policy at all.  What am I missing here?"

To help clarify I am including the entire policy text not just the 
paragraph that is changing, and proposing a new title that I hope better 
expresses the intent of the policy.

> Owen DeLong - "I would rather see this simply state when the ARIN free pool has less than one /8 of space remaining, notwithstanding reservations under NRPM 4.4 and 4.10 rather than the convoluted retroactive phrasing in the current proposal text."

I believe the new text and rationale covers this;

> Joe Maimon - "b) What happens if the pool grows back to over /8? "

I tired to address this issue in the last sentence, and I believe the 
intent is to stay at 3-months once triggered, even if we go back above 
/8.  Also, see in the rationale for a discussion of the exact amount 
available in the free pool after the triggering request is fulfilled.

Feed back and/or suggestions please;

-------------------

Title: Return to 12 Month Supply and Reset Trigger to /8 in Free Pool

Policy statement:

4.2.4.4. Subscriber Members After One Year

After an organization has been a subscriber member of ARIN for one year, 
they may choose to request up to a twelve (12) month supply of IP addresses.

When the ARIN Free Pool is down to the equilivant of one /8, excluding 
all special reservations, the length of supply that an organization may 
request will be reduced. An organization may choose to request up to a 
three (3) month supply of IP addresses. Any request that reduces the 
ARIN free pool below the /8 threshold above will trigger the reduction 
for that and all subsequent requests by all organizations.

Rationale:

There has been discussion in the community that ARIN's inventory of IPv4 
addresses may be excessive given the reduction in the rate of 
consumption which is concurrent with the reduction to a 3 month supply 
when ARIN received it last /8 at IANA run-out.  And that such an excess 
inventory in the ARIN region may be damaging the transition to IPv6 by 
elongating the amount of time between ARIN's exhaustion and exhaustion 
by other RIR's, thus creating a dangerous skew across parts of Internet 
in the need to transition to IPv6.  One solution for this issue is 
increase ARIN's rate of consumption by restoring the a 12 month supply 
of addresses.

ARIN's stewardship responsibilities are of primary concern in this 
region.  However, restoring the a 12 month supply of addresses is 
consistent with these stewardship responsibilities.  Asking businesses 
to request addresses on a three month basis with such large inventory 
available at ARIN unnecessarily increases the cost and complexity of 
operating networks; repeated and slow interactions with ARIN, duplicate 
paperwork requirements and an inefficient use of resources by all 
compound the pain.

The original intent of ARIN-2009-8 "Equitable IPv4 Run-Out" wasn't 
necessarily to slow the consumption of IPv4 but to limit the competitive 
disadvantage created by unequal run-out.  However, when the trigger of 
IANA run-out was selected it wasn't anticipated that ARIN would have 
more that 5 /8s in inventory when IANA run-out occurred.  Therefore, 
restoring the 12-month supply and resetting the trigger for a reduction 
to a 3-month supply to a locally controlled event seems consistent with 
the original intent of ARIN-2010-8 as well.

Considering that the ARIN region has consumed significantly less than a 
/8 since the 3-month supply was triggered at IANA run-out a year ago; 
Resetting the trigger for the 3-month supply to /8 in the free pool, 
excluding all special reservations, seems reasonable.  The special 
reservations to be excluded, should include all reservations made in 
policy, including those in sections 4.4, 4.10, any new reservations made 
by subsequent policies, and may also include reservations for draft 
policies in process at the board's discretion, such as Draft Policy 
ARIN-2011-5: Shared Transition Space for IPv4 Address Extension.

Please Note:  By triggering on any request that would drop the free pool 
below /8 it is possible that when there will be slightly more or 
slightly less than /8 available after the triggering request is 
fulfilled. The size of the triggering request and the exact amount above 
/8 available in the free pool will determine how much more or less than 
/8 will be available after the triggering request is fulfilled.  This 
could be as much as 3/4 of the triggering request above /8 or as much as 
1/4 of the triggering request below /8 available after fulfilling the 
triggering request.

To help clarify how this policy proposal changes Section 4.2.4.4, the 
current policy text as of Feb 10, 2012 is included below;

4.2.4.4. Subscriber Members After One Year

After an organization has been a subscriber member of ARIN for one year, 
they may choose to request up to a 12-month supply of IP addresses.

When ARIN receives its last /8, by IANA implementing section 10.4.2.2, 
the length of supply that an organization may request will be reduced. 
An organization may choose to request up to a 3-month supply of IP 
addresses.


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David Farmer               Email:farmer at umn.edu
Networking & Telecommunication Services
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