[arin-ppml] ARIN-prop-138 IPv6 Size Category Alignment

ARIN info at arin.net
Mon Mar 14 17:18:25 EDT 2011

ARIN-prop-138 IPv6 Size Category Alignment

ARIN received the following policy proposal and is posting it to the
Public Policy Mailing List (PPML) in accordance with the Policy
Development Process.

The ARIN Advisory Council (AC) will review the proposal at their next
regularly scheduled meeting (if the period before the next regularly
scheduled meeting is less than 10 days, then the period may be extended
to the subsequent regularly scheduled meeting). The AC will decide how
to utilize the proposal and announce the decision to the PPML.

The AC invites everyone to comment on the proposal on the PPML,
particularly their support or non-support and the reasoning
behind their opinion. Such participation contributes to a thorough
vetting and provides important guidance to the AC in their deliberations.

Draft Policies and Proposals under discussion can be found at:

The ARIN Policy Development Process can be found at:

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Communications and Member Services
American Registry for Internet Numbers (ARIN)

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ARIN-prop-138 IPv6 Size Category Alignment

Proposal Originator: Charles Gucker

Proposal Version: 1.0

Date: 14 March 2011

Proposal type: modify

Policy term: permanent

Policy statement:

For IPv6 ISP Classification, the "Size Category" shall be determined
based on the following schedule:

X-small    /32 or smaller
Small      /31 to /30
Medium     /29 to /27
Large      /26 to /24
X-large    /23 to /20
XX-large          /20 and larger


Since the adoption of ARIN Policy 2001-4 and the introduction of the
IPv6 fee schedule there has existed a discontinuity between the fee
schedule and the policy language.   As the policy is written,
" Initial allocation size Organizations that meet at least one
of the following criteria are eligible to receive a minimum allocation
of /32. …",  However, the fee schedule currently states that an ISP
within the X-Small category be allocated "smaller than /40" and the
Small category of "/40 to /32".   As a result, with current policy an
existing ISP within the X-Small category, when requesting the minimum
IPv6 allocation, would have to jump Size categories to receive their
IPv6 Allocation.  With the IANA IPv4 runout behind us, it is important
to eliminate all hurdles for existing Organizations to receive IPv6
allocations, even the X-Small.   This proposal is intended to do just
that by aligning the Size Category with current policy.

Timetable for implementation: immediate

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