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Draft Policies and Proposals

Policy 2005-5: IPv6 HD ratio
Policy Proposal Evaluation Status: Author
Adopted - NRPM Sections 6.5.2.2 and 6.7 Andrew Dul
Discussion Tracking
Mailing List:
Formal introduction on PPML on 25 May 2005
Last call from 31 October through 15 November 2005
Public Policy Mailing List
ARIN Public Policy Meeting: ARIN XVI
ARIN Advisory Council:

19 May 2005
21 July 2005
18 August 2005
27 October 2005
17 November 2005

ARIN Board of Trustees: 12 February 2006
Revisions Implementation
17 February 2006

Proposal

Policy Proposal 2005-5: IPv6 HD ratio

Author: Andrew Dul

Policy term: permanent

Policy statement: Change HD ratio used for IPv6 allocations to 0.94

This would modify sections 6.5.2.2 & 6.7 (including the HD-ratio to percentage table) of the NRPM.

Rationale:

Recent research has shown that based upon certain growth models the current IPv6 allocation policy using the HD ratio of 0.8 will allocate between a /1 and /4 of IPv6 address space over the period of about 60 years.

http://www.ietf.org/internet-drafts/draft-huston-ipv6-hd-metric-00.txt

By changing the HD ratio to 0.94, this would require LIRs to have a higher utilization of the /48s that are assigned to end sites before being able to obtain additional allocations. This policy would change the threshold for an LIR holding a /32 from approximately 11% to 51%. An LIR with a /20 would have a utilized percentage of approximately 31% vs. the current 2%.

This policy may also prevent the hoarding of IPv6 addresses by current organizations with large customer bases, but no substantial current IPv6 network.

Timetable for implementation: Within 30 days of ratification by the BoT.

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