Dynamic Host Configuration Protocol (DHCPv4 and DHCPv6) Options for IEEE 802.21 Mobility Services (MoS) Discovery
RFC 5678

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Network Working Group                                           G. Bajko
Request for Comments: 5678                                         Nokia
Category: Standards Track                                         S. Das
                                             Telcordia Technologies Inc.
                                                           December 2009

  Dynamic Host Configuration Protocol (DHCPv4 and DHCPv6) Options for
             IEEE 802.21 Mobility Services (MoS) Discovery

Abstract

   This document defines new Dynamic Host Configuration Protocol (DHCPv4
   and DHCPv6) options that contain a list of IP addresses and a list of
   domain names that can be mapped to servers providing IEEE 802.21 type
   of Mobility Service (MoS) (see RFC 5677).  These Mobility Services
   are used to assist a mobile node (MN) in handover preparation
   (network discovery) and handover decision (network selection).  The
   services addressed in this document are the Media Independent
   Handover Services defined in IEEE 802.21.

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (c) 2009 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 BSD License.

Bajko & Das                 Standards Track                     [Page 1]
RFC 5678           Mobility Services for DCHP Options      December 2009

Table of Contents

   1. Introduction ....................................................2
      1.1. Conventions Used in This Document ..........................3
      1.2. Terminology ................................................3
   2. MoS IPv4 Address Option for DHCPv4 ..............................3
   3. MoS Domain Name List Option for DHCPv4 ..........................5
   4. MoS IPv6 Address Option for DHCPv6 ..............................7
   5. MoS Domain Name List Option for DHCPv6 ..........................9
   6. Option Usage ...................................................10
      6.1. Usage of MoS Options for DHCPv4 ...........................10
      6.2. Usage of MoS Options for DHCPv6 ...........................11
   7. Security Considerations ........................................12
   8. IANA Considerations ............................................12
   9. Acknowledgements ...............................................13
   10. References ....................................................13
      10.1. Normative References .....................................13
      10.2. Informative References ...................................14

1.  Introduction

   IEEE 802.21 [IEEE802.21] defines three distinct service types to
   facilitate link layer handovers across heterogeneous technologies:

   a) Information Services (IS)
      IS provides a unified framework to the higher-layer entities
      across the heterogeneous network environment to facilitate
      discovery and selection of multiple types of networks existing
      within a geographical area.  The objective is to help the higher-
      layer mobility protocols acquire a global view of heterogeneous
      networks and perform seamless handover across these networks.

   b) Event Services (ES)
      Events may indicate changes in state and transmission behavior of
      the physical, data link, and logical link layers, or predict state
      changes of these layers.  The Event Service may also be used to
      indicate management actions or command status on the part of the
      network or some management entity.

   c) Command Services (CS)
      The command service enables higher layers to control the physical,
      data link, and logical link layers.  The higher layers may control
      the reconfiguration or selection of an appropriate link through a
      set of handover commands.

Bajko & Das                 Standards Track                     [Page 2]
RFC 5678           Mobility Services for DCHP Options      December 2009

   In IEEE terminology, these services are called Media Independent
   Handover (MIH) services.  While these services may be co-located, the
   different pattern and type of information they provide do not