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Dynamic Host Configuration Protocol (DHCPv4 and DHCPv6) Option for Civic Addresses Configuration Information draft-ietf-geopriv-dhcp-civil-09. Henning Schulzrinne Columbia University. Overview. Complementary to RFC 3825 (geo) Meant for network operator to convey civil location to device

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henning schulzrinne columbia university

Dynamic Host Configuration Protocol (DHCPv4 and DHCPv6) Option for Civic Addresses Configuration Information draft-ietf-geopriv-dhcp-civil-09

Henning Schulzrinne

Columbia University

ESW'06

overview
Overview
  • Complementary to RFC 3825 (geo)
  • Meant for network operator to convey civil location to device
    • country, administrative units, street, floor
    • use cases: emergency services, device management
  • Likely applications:
    • enterprise LAN
    • hotel, airport hot spots
    • home networks
  • Does not provide location to third parties, just own location to target
  • Attempts to be country-neutral
    • just assumes a hierarchical division of country
    • extensible if more descriptors are needed later
  • Support both civic (street) and postal addresses

ESW'06

dhcpv4 format
DHCPv4 Format

GEOCONF_CIVIC

length

what

(server, NE, client)

country

code

civic address elements

  • what: DHCP, closest network element or client
  • country code: e.g., US, DE

ESW'06

element format
Element format

CAtype

CAlength

CAvalue

CAtype: type of data

CAlength: length (bytes) of CAvalue

ESW'06

languages and scripts
Languages and scripts
  • DHCP option uses UTF8
  • Some elements may have multiple variations
    • scripts (e.g., Japan) – UTF8 does not necessarily distinguish (“Han unification”)
    • languages (Köln, Cologne)
  • Others may only have one rendering
    • street names
  • uses CAtypes 0 (language) and 128 (script) to mark sets of CAtypes
    • language: e.g., “de-CH” = German as used in Switzerland
    • script: e.g., “Latn”

ESW'06

more location elements
More location elements

RED = draft-ietf-geopriv-revised-civic-lo

ESW'06

branching streets
Branching streets

Carol Ln

West Alice Pde.

Section 1

Section 2

Section 3

Carol Ln

Alley 2

ESW'06

conclusion
Conclusion
  • Attempt at global civic address format
    • including multi-script and multi-language addresses
    • extensible (within DHCP size constraints)
  • Supports both postal and civic addresses
  • Being mapped to XML (PIDF) format

ESW'06