Discovering the Local Location Information Server (LIS)
RFC 5986
Document | Type | RFC - Proposed Standard (September 2010; Errata) | |
---|---|---|---|
Authors | Martin Thomson , James Winterbottom | ||
Last updated | 2015-10-14 | ||
Replaces | draft-thomson-geopriv-lis-discovery | ||
Stream | Internent Engineering Task Force (IETF) | ||
Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
Reviews | |||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 5986 (Proposed Standard) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Robert Sparks | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) M. Thomson Request for Comments: 5986 J. Winterbottom Category: Standards Track Andrew Corporation ISSN: 2070-1721 September 2010 Discovering the Local Location Information Server (LIS) Abstract Discovery of the correct Location Information Server (LIS) in the local access network is necessary for Devices that wish to acquire location information from the network. A method is described for the discovery of a LIS in the access network serving a Device. Dynamic Host Configuration Protocol (DHCP) options for IP versions 4 and 6 are defined that specify a domain name. This domain name is then used as input to a URI-enabled NAPTR (U-NAPTR) resolution process. 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/rfc5986. Copyright Notice Copyright (c) 2010 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. Thomson & Winterbottom Standards Track [Page 1] RFC 5986 LIS Discovery September 2010 Table of Contents 1. Introduction and Overview . . . . . . . . . . . . . . . . . . 2 1.1. Discovery Procedure Overview . . . . . . . . . . . . . . . 3 1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3 2. LIS Discovery Procedure . . . . . . . . . . . . . . . . . . . 4 2.1. Residential Gateways . . . . . . . . . . . . . . . . . . . 6 2.2. Virtual Private Networks (VPNs) . . . . . . . . . . . . . 7 3. Determining a Domain Name . . . . . . . . . . . . . . . . . . 7 3.1. Domain Name Encoding . . . . . . . . . . . . . . . . . . . 7 3.2. Access Network Domain Name DHCPv4 Option . . . . . . . . . 8 3.3. Access Network Domain Name DHCPv6 Option . . . . . . . . . 8 3.4. Alternative Domain Names . . . . . . . . . . . . . . . . . 9 4. U-NAPTR Resolution of a LIS URI . . . . . . . . . . . . . . . 10 5. Security Considerations . . . . . . . . . . . . . . . . . . . 11 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13 6.1. Registration of DHCPv4 and DHCPv6 Option Codes . . . . . . 13 6.2. Registration of a Location Server Application Service Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6.3. Registration of a Location Server Application Protocol Tag for HELD . . . . . . . . . . . . . . . . . . . . . . . 13 7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 14 8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 14 8.1. Normative References . . . . . . . . . . . . . . . . . . . 14 8.2. Informative References . . . . . . . . . . . . . . . . . . 15 1. Introduction and Overview The location of a Device is a useful and sometimes necessary part of many services. A Location Information Server (LIS) is responsible for providing that location information to Devices with attached access networks used to provide Internet access. The LIS uses knowledge of the access network and its physical topology to generate and serve location information to Devices. Each access network requires specific knowledge about topology. Therefore, it is important to discover the LIS that has the specific knowledge necessary to locate a Device, that is, the LIS that serves the current access network. Automatic discovery is important where there is any chance of movement outside a single access network. Reliance on static configuration can lead to unexpected errors if a Device moves between access networks. This document describes a process that a Device can use to discover a LIS. This process uses a DHCP option and the DNS. The product ofShow full document text