RFC 6877 - 464XLAT: Combination of Stateful and Stateless Translation

Request for Comments: 6877
Category: Informational
ISSN: 2070-1721

Authors:

• M. Mawatari, Japan Internet Exchange
• M. Kawashima, NEC AccessTechnica, Ltd.
• C. Byrne, T-Mobile USA

Publication Date: April 2013

Abstract

This document describes an architecture (464XLAT) for providing limited IPv4 connectivity across an IPv6-only network by combining existing and well-known stateful protocol translation (as described in RFC 6146) in the core and stateless protocol translation (as described in RFC 6145) at the edge. 464XLAT is a simple and scalable technique to quickly deploy limited IPv4 access service to IPv6-only edge networks without encapsulation.

Status of This Memo

This document is not an Internet Standards Track specification; it is published for informational purposes.

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). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see 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/rfc6877.

Copyright Notice

Copyright (c) 2013 IETF Trust and the persons identified as the document authors. All rights reserved.

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Contents

• 1. Introduction
• 2. Terminology
• 3. Motivation and Uniqueness of 464XLAT
• 4. Network Architecture
  • 4.1. Wireline Network Architecture
  • 4.2. Wireless 3GPP Network Architecture
• 5. Applicability
  • 5.1. Wireline Network Applicability
  • 5.2. Wireless 3GPP Network Applicability
• 6. Implementation Considerations
  • 6.1. IPv6 Address Format
  • 6.2. IPv4/IPv6 Address Translation Chart
  • 6.3. IPv6 Prefix Handling
  • 6.4. DNS Proxy Implementation
  • 6.5. CLAT in a Gateway
  • 6.6. CLAT-to-CLAT Communications
• 7. Deployment Considerations
  • 7.1. Traffic Engineering
  • 7.2. Traffic Treatment Scenarios
• 8. Security Considerations
• 9. Acknowledgements
• 10. References
  • 10.1. Normative References
  • 10.2. Informative References
• Appendix A. Examples of IPv4/IPv6 Address Translation
• Authors' Addresses