DHCPv4 and DHCPv6 Options for Access Network Discovery and Selection Function (ANDSF) Discovery
RFC 6153

Internet Engineering Task Force (IETF)                            S. Das
Request for Comments: 6153                        Telcordia Technologies
Category: Standards Track                                       G. Bajko
ISSN: 2070-1721                                                    Nokia
                                                           February 2011

                     DHCPv4 and DHCPv6 Options for
   Access Network Discovery and Selection Function (ANDSF) Discovery

Abstract

   This document defines new Dynamic Host Configuration Protocol (DHCPv4
   and DHCPv6) options to enable a mobile node to discover Access
   Network Discovery and Selection Function (ANDSF) entities in an IP
   network.  ANDSF is being developed in the Third Generation
   Partnership Project (3GPP) and provides inter-system mobility
   policies and access-network-specific information to the mobile nodes
   (MNs).

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/rfc6153.

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
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   described in the Simplified BSD License.

Das & Bajko                  Standards Track                    [Page 1]
RFC 6153                   ANDSF DHCP Options              February 2011

Table of Contents

   1. Introduction ....................................................2
      1.1. Conventions Used in This Document ..........................3
      1.2. Terminology and Abbreviations Used in This Document ........3
   2. ANDSF IPv4 Address Option for DHCPv4 ............................3
   3. ANDSF IPv6 Address Option for DHCPv6 ............................4
   4. Option Usage ....................................................4
      4.1. Usage of ANDSF Options for DHCPv4 ..........................4
           4.1.1. Mobile Node Behavior ................................4
      4.2. Usage of ANDSF Options for DHCPv6 ..........................5
           4.2.1. Mobile Node Behavior ................................5
   5. Security Considerations .........................................5
   6. IANA Considerations .............................................5
   7. Acknowledgments .................................................6
   8. References ......................................................6
      8.1. Normative References .......................................6
      8.2. Informative References .....................................6

1.  Introduction

   Access Network Discovery and Selection Function (ANDSF) is being
   defined in 3GPP [3GPPTS23.402] to provide necessary network discovery
   and selection assistance data to the mobile nodes for multi-access
   network scenarios where 3GPP access-network level solutions are not
   sufficient for the mobile nodes to perform network discovery and
   selection of non-3GPP networks.

   The information provided by ANDSF contains inter-system mobility
   policies and access-network-specific data to assist the mobile node
   with performing the inter-system handover.  This set of information
   can either be provisioned in the mobile node by the home operator or
   provided to the mobile node (MN) dynamically by the ANDSF over the
   S14 reference point as defined in [3GPPTS23.402] and [3GPPTS24.302].

   In 3GPP, the ANDSF is located either in the subscriber's home
   operator or visited network and needs to be known to the MN or
   discovered by the MN.  According to [3GPPTS23.402] and
   [3GPPTS24.302], the ANDSF is discovered through interaction with the
   Domain Name Service function or the DHCP server function.

   This document defines new DHCPv4 and DHCPv6 options called the ANDSF
   IP Address Options, which allow the MN to locate an ANDSF server.