Dynamic Host Configuration Protocol Options for Coordinate-Based Location Configuration Information
RFC 6225

Internet Engineering Task Force (IETF)                           J. Polk
Request for Comments: 6225                                    M. Linsner
Obsoletes: 3825                                            Cisco Systems
Category: Standards Track                                     M. Thomson
ISSN: 2070-1721                                       Andrew Corporation
                                                           B. Aboba, Ed.
                                                   Microsoft Corporation
                                                               July 2011

            Dynamic Host Configuration Protocol Options for
          Coordinate-Based Location Configuration Information

Abstract

   This document specifies Dynamic Host Configuration Protocol options
   (both DHCPv4 and DHCPv6) for the coordinate-based geographic location
   of the client.  The Location Configuration Information (LCI) includes
   Latitude, Longitude, and Altitude, with resolution or uncertainty
   indicators for each.  Separate parameters indicate the reference
   datum for each of these values.  This document obsoletes RFC 3825.

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/rfc6225.

Polk, et al.                 Standards Track                    [Page 1]
RFC 6225             DHCP Options for Coordinate LCI           July 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
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   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
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   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.

Polk, et al.                 Standards Track                    [Page 2]
RFC 6225             DHCP Options for Coordinate LCI           July 2011

Table of Contents

   1. Introduction ....................................................3
      1.1. Conventions Used in This Document ..........................4
      1.2. Resolution and Uncertainty .................................4
   2. DHCP Option Formats .............................................6
      2.1. DHCPv6 GeoLoc Option .......................................6
      2.2. DHCPv4 Options .............................................8
      2.3. Latitude and Longitude Fields .............................11
      2.4. Altitude ..................................................14
      2.5. Datum .....................................................16
   3. Security Considerations ........................................17
   4. IANA Considerations ............................................17
      4.1. DHCP Options ..............................................17
      4.2. Altitude Type Registry ....................................18
      4.3. Datum Registry ............................................18
      4.4. GeoLoc Option Version Registry ............................19
   5. Acknowledgments ................................................20
   6. References .....................................................20
      6.1. Normative References ......................................20
      6.2. Informative References ....................................21