IPv6 Address Assignment to End Sites
RFC 6177
Document | Type |
RFC - Best Current Practice
(March 2011; No errata)
Obsoletes RFC 3177
Also known as BCP 157
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Authors | Rosalea Roberts , Geoff Huston , Thomas Narten | ||
Last updated | 2018-12-20 | ||
Replaces | draft-narten-ipv6-3177bis-48boundary | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6177 (Best Current Practice) | |
Action Holders |
(None)
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Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Ron Bonica | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) T. Narten Request for Comments: 6177 IBM BCP: 157 G. Huston Obsoletes: 3177 APNIC Category: Best Current Practice L. Roberts ISSN: 2070-1721 Stanford University March 2011 IPv6 Address Assignment to End Sites Abstract RFC 3177 argued that in IPv6, end sites should be assigned /48 blocks in most cases. The Regional Internet Registries (RIRs) adopted that recommendation in 2002, but began reconsidering the policy in 2005. This document obsoletes the RFC 3177 recommendations on the assignment of IPv6 address space to end sites. The exact choice of how much address space to assign end sites is an issue for the operational community. The IETF's role in this case is limited to providing guidance on IPv6 architectural and operational considerations. This document reviews the architectural and operational considerations of end site assignments as well as the motivations behind the original recommendations in RFC 3177. Moreover, this document clarifies that a one-size-fits-all recommendation of /48 is not nuanced enough for the broad range of end sites and is no longer recommended as a single default. This document obsoletes RFC 3177. Status of This Memo This memo documents an Internet Best Current Practice. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on BCPs is available in Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc6177. Narten, et al. Best Current Practice [Page 1] RFC 6177 IPv6 Address Assignment to End Sites March 2011 Copyright Notice Copyright (c) 2011 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Table of Contents 1. Introduction ....................................................3 2. On /48 Assignments to End Sites .................................4 3. Other RFC 3177 Considerations ...................................6 4. Impact on IPv6 Standards ........................................6 4.1. RFC 3056: Connection of IPv6 Domains via IPv4 Clouds .......6 4.2. IPv6 Multicast Addressing ..................................7 5. Summary .........................................................7 6. Security Considerations .........................................8 7. Acknowledgments .................................................8 8. Informative References ..........................................8 Narten, et al. Best Current Practice [Page 2] RFC 6177 IPv6 Address Assignment to End Sites March 2011 1. Introduction There are a number of considerations that factor into address assignment policies. For example, to provide for the long-term health and scalability of the public routing infrastructure, it is important that addresses aggregate well [ROUTE-SCALING]. Likewise, giving out an excessive amount of address space could result in premature depletion of the address space. This document focuses onShow full document text