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RADIUS Attribute for IPv6 Rapid Deployment on IPv4 Infrastructures (6rd)
RFC 6930

Internet Engineering Task Force (IETF)                            D. Guo
Request for Comments: 6930                                 S. Jiang, Ed.
Category: Standards Track                   Huawei Technologies Co., Ltd
ISSN: 2070-1721                                               R. Despres
                                                               RD-IPtech
                                                             R. Maglione
                                                           Cisco Systems
                                                              April 2013

               RADIUS Attribute for IPv6 Rapid Deployment
                     on IPv4 Infrastructures (6rd)

Abstract

   The IPv6 Rapid Deployment on IPv4 Infrastructures (6rd) provides both
   IPv4 and IPv6 connectivity services simultaneously during the
   IPv4/IPv6 coexistence period.  The Dynamic Host Configuration
   Protocol (DHCP) 6rd option has been defined to configure the 6rd
   Customer Edge (CE).  However, in many networks, the configuration
   information may be stored in the Authentication Authorization and
   Accounting (AAA) servers, while user configuration is mainly acquired
   from a Broadband Network Gateway (BNG) through the DHCP protocol.
   This document defines a Remote Authentication Dial-In User Service
   (RADIUS) attribute that carries 6rd configuration information from
   the AAA server to BNGs.

Status of This Memo

   This is an Internet Standards Track document.

   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
   Internet Standards 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/rfc6930.

Guo, et al.                  Standards Track                    [Page 1]
RFC 6930                     RADIUS for 6rd                   April 2013

Copyright Notice

   Copyright (c) 2013 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.

Table of Contents

   1. Introduction ....................................................3
   2. Terminology .....................................................3
   3. IPv6 6rd Configuration with RADIUS ..............................4
   4. Attributes ......................................................6
      4.1. IPv6-6rd-Configuration Attribute ...........................6
      4.2. Table of Attributes ........................................9
   5. Diameter Considerations .........................................9
   6. Security Considerations .........................................9
   7. IANA Considerations ............................................10
   8. Acknowledgments ................................................10
   9. References .....................................................10
      9.1. Normative References ......................................10
      9.2. Informative References ....................................11

Guo, et al.                  Standards Track                    [Page 2]
RFC 6930                     RADIUS for 6rd                   April 2013

1.  Introduction

   Recently, providers have started to deploy IPv6 and to consider
   transition to IPv6.  The IPv6 Rapid Deployment (6rd) [RFC5969]
   provides both IPv4 and IPv6 connectivity services simultaneously
   during the IPv4/IPv6 coexistence period.  6rd is used to provide IPv6
   connectivity service through legacy IPv4-only infrastructure.  6rd
   uses the Dynamic Host Configuration Protocol (DHCP) [RFC2131], and
   the 6rd Customer Edge (CE) uses the DHCP 6rd option [RFC5969] to
   discover a 6rd Border Relay and to configure an IPv6 prefix and
   address.

   In many networks, user-configuration information is managed by
   Authentication, Authorization, and Accounting (AAA) servers.  The
   Remote Authentication Dial-In User Service (RADIUS) protocol
   [RFC2865] is usually used by AAA servers to communicate with network

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