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IETF RFC 4773

Administration of the IANA Special Purpose IPv6 Address Block

Last modified on Thursday, December 21st, 2006

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Network Working Group                                          G. Huston
Request for Comments: 4773                                         APNIC
Category: Informational                                  December 2006


     Administration of the IANA Special Purpose IPv6 Address Block

 Status of This Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

 Copyright Notice

   Copyright © The IETF Trust (2006).

 Abstract

   This is a direction to IANA concerning the management of the IANA
   Special Purpose IPv6 address assignment registry.

1.  Introduction

   This is a direction to IANA concerning the management of the IANA
   Special Purpose IPv6 address assignment registry.

2.  IANA IPv6 Special Purpose Address Block

   [RFC 2928] specified the assignment of the IPv6 address prefix to
   IANA.  The rationale for this allocation is:

      "The block of Sub-TLA IDs assigned to the IANA (i.e., 2001:
      0000::/29 - 2001:01F8::/29) is for assignment for testing and
      experimental usage to support activities such as the 6bone, and
      for new approaches like exchanges."  [RFC 2928]

   This address allocation to IANA was intended to support testing and
   experimental activities.  A more general view of the roles of IANA
   with respect to address allocation functions is documented in
   [RFC 2860]:

      "4.3. [...]  Note that [...] (b) assignments of specialised
      address blocks (such as multicast or anycast blocks), and (c)
      experimental assignments are not considered to be policy issues,
      and shall remain subject to the provisions of this Section 4.
      (For purposes of this MOU, the term "assignments" includes
      allocations.)"  [RFC 2860]



Huston                       Informational                   PAGE 1 top


RFC 4773 IANA IPv6 Registry December 2006 The reference to section 4 here is to the general technical work for the IANA: "4.1. The IANA will assign and register Internet protocol parameters only as directed by the criteria and procedures specified in RFCs, including Proposed, Draft, and full Internet Standards and Best Current Practice documents, and any other RFC that calls for IANA assignment." [RFC 2860] This document directs IANA to undertake designation of special purpose address blocks within the purview of direct assignments by the IANA under the terms of the assignment criteria specified in RFC 2928. This document directs IANA to open a Special Purpose IPv6 address registry for the management of these IANA-designated address blocks. Special Purpose registrations to be made from this registry include addresses for experimental purposes, as described in [RFC 2928], and other special purpose cases, as documented in IESG-reviewed published RFCs, according to the provisions described in section 4.1 of [RFC 2860]. 3. IANA Considerations IANA maintains an "IANA IPv6 Address Special Purpose Registry". The registry records current IANA address designations from the IANA- managed Special Purpose IPv6 address pool. This recommendation concerns the management of the address pool assigned by the IETF to the IANA in July 1999 by [RFC 2928], namely 2001:0000::/23. Following the policies outlined in [RFC 2434], further assignments of address space to IANA for subsequent designation of address prefixes for the purposes listed here shall be undertaken only through an IETF Consensus action. Such directions for assignments of address space to augment the IANA-managed special purpose address pool should, in the general course of events, be consistent with prevailing IANA IPv6 address management policies [IPv6-Policies]. IANA may undertake IPv6 address designations in support of special purposes as requested in "IANA Considerations" sections in IESG- reviewed RFCs, where an address is requested with an intended use of the designated address block for the purpose of testing or experimental usage activities initiated by IETF, or for specialised use of the address block in a context (e.g., anycast) associated with an Internet Standards track protocol. Huston Informational PAGE 2 top

RFC 4773 IANA IPv6 Registry December 2006 The IANA IPv6 Special Purpose Address Registry records, for all current address designations undertaken by IANA: 1. The designated address prefix. 2. The RFC that called for the IANA address designation. 3. The date the designation was made. 4. The date the use designation is to be terminated (if specified as a limited-use designation). 5. The nature of the purpose of the designated address (e.g., unicast experiment or protocol service anycast). 6. For experimental unicast applications and otherwise as appropriate, the registry will also identify the entity and related contact details to whom the address designation has been made. 7. The registry will also note, for each designation, the intended routing scope of the address, indicating whether the address is intended to be routable only in scoped, local, or private contexts, or whether the address prefix is intended to be routed globally. 8. The date in the IANA registry is the date of the IANA action, i.e., the day IANA records the allocation. The IANA registry notes, as a general comment, that address prefixes listed in the Special Purpose Address Registry are not guaranteed routability in any particular local or global context. IANA will not maintain further sub-registries for any special purpose address block designated according to this direction. 4. Security Considerations Security of the Internet's routing system relies on the ability to authenticate an assertion of unique control of an address block. Measures to authenticate such assertions rely on validation that the address block forms part of an existing allocated address block, and that there is a trustable and unique reference in the IANA address registries. The proposed registry is intended to provide an authoritative source of information regarding the currency and intended purpose of special use IPv6 address blocks that are designated from the IANA- Huston Informational PAGE 3 top

RFC 4773 IANA IPv6 Registry December 2006 administered Special Use registry. This is a small step towards the creation of a comprehensive registry framework that can be used as a trust point for commencing a chain of address validation. Consideration should be given to IANA registry publication formats that are machine parseable, and also the use of file signatures and associated certificate mechanisms to allow applications to confirm that the registry contents are current, and that they have been published by the IANA. 5. Acknowledgements The document was prepared with the assistance of Leslie Daigle, Brian Haberman, Bob Hinden, David Kessens, Kurt Lindqvist, Thomas Narten, and Paul Wilson. 6. Informative References [IPv6-Policies] IANA, "IPv6 Allocation and Assignment Policy", June 2002. [RFC 2434] Narten, T. and H. Alvestrand, "Guidelines for Writing an IANA Considerations Section in RFCs", BCP 26, RFC 2434, October 1998. [RFC 2860] Carpenter, B., Baker, F., and M. Roberts, "Memorandum of Understanding Concerning the Technical Work of the Internet Assigned Numbers Authority", RFC 2860, June 2000. [RFC 2928] Hinden, R., Deering, S., Fink, R., and T. Hain, "Initial IPv6 Sub-TLA ID Assignments", RFC 2928, September 2000. Author's Address Geoff Huston Asia Pacific Network Information Centre EMail: gih@apnic.net URI: http://www.apnic.net Huston Informational PAGE 4 top

RFC 4773 IANA IPv6 Registry December 2006 Full Copyright Statement Copyright © The IETF Trust (2006). This document is subject to the rights, licenses and restrictions contained in BCP 78, and except as set forth therein, the authors retain all their rights. This document and the information contained herein are provided on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST, AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Intellectual Property The IETF takes no position regarding the validity or scope of any Intellectual Property Rights or other rights that might be claimed to pertain to the implementation or use of the technology described in this document or the extent to which any license under such rights might or might not be available; nor does it represent that it has made any independent effort to identify any such rights. Information on the procedures with respect to rights in RFC documents can be found in BCP 78 and BCP 79. Copies of IPR disclosures made to the IETF Secretariat and any assurances of licenses to be made available, or the result of an attempt made to obtain a general license or permission for the use of such proprietary rights by implementers or users of this specification can be obtained from the IETF on-line IPR repository at http://www.ietf.org/ipr. The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights that may cover technology that may be required to implement this standard. Please address the information to the IETF at ietf-ipr@ietf.org. Acknowledgement Funding for the RFC Editor function is currently provided by the Internet Society. Huston Informational PAGE 5 top

Administration of the IANA Special Purpose IPv6 Address Block RFC TOTAL SIZE: 10580 bytes PUBLICATION DATE: Thursday, December 21st, 2006 LEGAL RIGHTS: The IETF Trust (see BCP 78)


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