[arin-ppml] Recommended Draft Policy ARIN-2019-21: Reserved Pool Replenishment

ARIN info at arin.net
Tue Mar 24 13:20:11 EDT 2020

On 19 March 2020, the ARIN Advisory Council (AC) advanced the following 
Draft Policy to Recommended Draft Policy status:

ARIN-2019-21: Reserved Pool Replenishment

The text of the Recommended Draft Policy is below, and may also be found at:


You are encouraged to discuss all Recommended Draft Policies on PPML 
prior to their presentation at the next ARIN Public Policy Consultation 
(PPC). PPML and PPC discussions are invaluable to the AC when 
determining community consensus.

The PDP can be found at:

Draft Policies and Proposals under discussion can be found at:


Sean Hopkins
Policy Analyst
American Registry for Internet Numbers

Recommended Draft Policy ARIN-2019-21: Reserved Pool Replenishment

AC Assessment of Conformance with the Principles of Internet Number 
Resource Policy:

Draft policy 2019-21 enables fair number resource policy and is 
technically sound. It has the apparent support of the community.

Problem Statement:

While the current level of resources in the reserve pools created in 
Sections 4.4 and 4.10 presently seem more than adequate for their 
intended purposes. Nevertheless, even these well-resourced pools will 
eventually run out. Therefore, we should make arrangements for their 
replenishment, if or when necessary.

Policy Statement:

Add a new subsection in IPv4 General Principles, Section 4.1;

4.1.X Reserved Pool Replenishment

4.1.X.1 Disposition of Resources

Any resources allocated from a reserved pool created in Sections 4.4 or 
4.10, or any other reserved pools created in the future, that become 
available for re-issuance will be returned to the reserved pool they 
were originally allocated from, regardless of the current level of each 
pool. Further, any other resources which become available for 
re-issuance will be prioritized for the replenishment of any reserved 
pool that falls below a running three-year supply, which is based on the 
fprevious three years of allocations from each pool.

4.1.X.2 Precedence for Replenishment

Staff shall return groups of blocks to the pools in scheduled batches 
(staff shall set a reasonable schedule). Each available block in a batch 
shall be returned in order from largest to smallest to the pool which at 
that point has the lowest percentage of a 3-year supply for that 
particular pool.

Timetable for Implementation: Immediate

Anything Else:

ARIN Staff should regularly report on the levels and projected run-times 
for each reserved pool and immediately report when any reserved pool 
falls below a three-year running supply.

A three-year running supply was chosen to provide the ARIN Policy 
Community adequate time to react through policy, as deemed appropriate 
at that time, to an imminent run out event for one of the reserved pools.

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