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ZERO CONFIGURATION NETWORKING. PUSPARAJ MOHAPATRA SCHOOL OF INFORMATION TECHNOLOGY IIT KHARAGPUR. TOPICS TO BE COVERED. Introduction Essential network services & configuration Managing IP host configuration Architectural issues of zeroconf Status of ongoing work Future implication

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zero configuration networking

ZERO CONFIGURATION NETWORKING

PUSPARAJ MOHAPATRA

SCHOOL OF INFORMATION TECHNOLOGY

IIT KHARAGPUR

topics to be covered
TOPICS TO BE COVERED
  • Introduction
  • Essential network services & configuration
  • Managing IP host configuration
  • Architectural issues of zeroconf
  • Status of ongoing work
  • Future implication
  • Conclusion
  • Reference
introduction
INTRODUCTION
  • Today’s growing network infrastructure
  • Demerits of today’s networking
  • Zero configuration networking

--A Boon to Network

Infrastructure

ip configuration parameters
IP CONFIGURATION PARAMETERS
  • IP Address
  • Subnet mask
  • Default router address
  • Domain name
  • Domain name server
ip configuration
IP CONFIGURATION
  • Static configuration
  • Dynamic configuration
  • Automatic configuration
  • Figure:
destination address discovery
DESTINATION ADDRESS DISCOVERY

There are 3 ways

  • IP address configuration(self)
  • Domain name configuration(DNS)
  • Service discovery(DHCP)

Multicast Address Allocation:MADCAP

architectural issues in zeroconf
ARCHITECTURAL ISSUES IN ZEROCONF

Zeroconf constraints are :

  • Ease of use
  • Scalability
  • Automatic translation to & from configured networking
  • Secure operation
  • Transparency
  • Independence
ongoing work
ONGOING WORK
  • Requirement specification by IETF group
  • Zeroconf protocol areas under consideration
        • Automatic host configuration
        • Service discovery
        • Multicast domain name to address resolution
        • Automatic multicast address allocation
        • Transition to secure operation
automatic host configuration
AUTOMATIC HOST CONFIGURATION
  • IPV6 has address auto configuration
  • Claim & defend protocol is insufficient
  • Reclaim will be added
  • Link-local address
creation of link local address
CREATION OF LINK-LOCAL ADDRESS
  • Link-local address: well known link-local prefix+interface identifier
  • Interface identifier:Interface's link-layer address
  • Link-local prefix:FE80::0
creation cont
CREATION cont…
  • Link-local address is created after the following events:
      • Interface is initialized at system startup time
      • Interface attaches to a link for the first time
      • Interface is reinitiated after a temporary interface failure
      • Interface becomes enabled by system management having been administratively disabled
multicast domain name to address resolution
MULTICAST DOMAIN NAME TO ADDRESS RESOLUTION

*Multicast DNS(mdns)

  • Claim and defend mechanism
  • “stub” naming service in hosts
  • Hosts assign themselves a domain name with “.local” suffix
  • Multicast to broadcast address(224.0.0.251)
  • Claim & defend mechanism applies
  • Host can use caches.
service discovery
SERVICE DISCOVERY
  • Service allocation protocol(SLP)
      • Can use both in IPV4 & IPV6
      • SLP agent is deployed on each host
      • Multicast the message with type of service attributes
      • 3rd party can also cache this information
automatic multicast address allocation
AUTOMATIC MULTICAST ADDRESS ALLOCATION
  • Allows a host to obtain an address allocation for a multicast group for the host’s own purposes
  • Still in development stage, but there is one protocol which will support this
        • Zeroconf Multicast allocation protocol

(ZMAAP)

working of zmaap
Working of ZMAAP
  • Multicast Address Allocation Server (MAAS): A node providing multicast address allocation services to network clients.
  • Mini-MAAS: A service providing multicast address allocation services to applications running on the same host. Mini-MAASs cooperate to provide network-wide services in small networks without MAASs.It is local to a host.
  • Mini-MAAS contacts other Mini-MAAS for address allocation
slide16
Translation to secure operations
  • Future work
        • Feasible inside the computers or in emergency shelters
        • Scale to internet
        • Owners & operations cannot know the presence of a network
reference
REFERENCE
  • draft-cheshire-dnsext-multicastdns-05.txt: Stuart Cheshire, Marc Krochmal, 7th June 2005
  • draft-ietf-zeroconf-zmaap-02.txt: Octavian Catrina, Dave Thaler, Bernard Aboba, Erik Guttman.org/
  • http://Zeroconf Zero Configuration networking.htm 
  • IPv6 Stateless Address Autoconfiguration: S. Thomson, Bellcore, T.Narten 
  • Zero Configuration Networking: Erik GUTTMAN 
  •  http://zeroconf.org/
  • http://www.multicastdns.org/
  • http://en.wikipedia.org/wiki/zeroconf
  • http://en.wikipedia.org/wiki/service_location_protocol