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IPv6 The Next Generation. Saroj Patil Nadine Sundquist Chuck Short CS622-F2007 University of Colorado, Colorado Springs Dr. C. Edward Chow. IPv6 New Features. New header format Larger address space Efficient and hierarchical addressing and routing infrastructure

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ipv6 the next generation

IPv6The Next Generation

Saroj Patil

Nadine Sundquist

Chuck Short


University of Colorado, Colorado Springs

Dr. C. Edward Chow

ipv6 new features
IPv6 New Features
  • New header format
  • Larger address space
  • Efficient and hierarchical addressing and routing infrastructure
  • Stateless and stateful address configuration
  • Built-in security – Authentication and Encryption
  • New protocol for neighboring node interaction
  • Extensibility – Add extension headers
ipv6 addressing
IPv6 Addressing
  • RFC 1884: http://www.ietf.org/rfc/rfc1884.txt
  • Three types
    • Unicast
      • Packet delivered to a single interface.
    • Anycast
      • Packet delivered to the nearest of a set of interfaces.
    • Multicast
      • Packet delivered to all interfaces in a set.
      • Note: Multicast supersedes Broadcast
unicast ipv6 addresses
Unicast IPv6 Addresses
  • Global Addresses: Equivalent of IPv4 addresses and are used in IPv6.
  • Site-local Addresses: Deprecated by the Internet Engineering Task Force.
  • Link-local Addresses: Equivalent of IPv5-based Automatic Private IP Addressing.
  • Unique Local Addresses (local addresses): Replacement of Site-local Addresses.
  • Address Selection Rules
    • Source and Destination Address Selection for IPv6
addressing formats
Addressing Formats
  • Three formats
    • Preferred
      • 8 (16 bit fields), hexedecimal, separated by colons (:)
      • 1234:abcd:1234:abcd:1234:abcd:1234:abcd
    • Compressed
      • Leading zeroes removed
        • abcd:0000:0000:0000:0bcd:0000:0000:0000
        • abcd::bcd:0:0:0
    • Transition
      • IPv4- compatible
      • IPv4-mapped
ipv4 and ipv6
IPv4 and IPv6
  • Dual IP Layer ArchitectureDual Stack Architecture

Windows Vista and LonghornWindows Server 2003 and XP

ipv6 over ipv4 tunneling
IPv6 over IPv4 Tunneling
  • The IPv4 Protocol field is set to 41 to indicate an encapsulated IPv6 packet.
  • The Source and Destination fields are set to IPv4 addresses of the tunnel endpoints.
types of tunnels
Types of Tunnels
  • Configured
    • Manual configuration of endpoints
    • Typically router-to-router
  • Automatic
    • Intra-site Automatic Tunnel Addressing Protocol (ISATAP)
      • Used for unicast communication across an IPv4 Intranet.
    • 6to4
      • Used for unicast communication across the IPv4 Internet.
    • Teredo
      • Used for unicast communication across the IPv4 Internet over network address translators (NATs).
    • IPv6 Automatic Tunneling
      • Used for unicast communication across an IPv4 network that uses public IPv4 addresses.
    • 6over4
      • Used for unicast or multicast communication across an IPv4 Intranet.
migrating to ipv6
Migrating to IPv6
  • Upgrade your applications to be independent of IPv6 or IPv4.
  • Update the DNS infrastructure to support IPv6 address and PTR records.
  • Upgrade hosts to IPv6/IPv4 nodes.
    • Hosts must be upgraded to use a dual IP layer or dual IP stack.
  • Upgrade routing infrastructure for native IPv6 routing.
  • Convert IPv6/IPv4 nodes to IPv6-only nodes.
lessons learned
Lessons Learned
  • Windows is more difficult than Fedora to configure as a router.
  • ISATAP router useful if one has complete control of the IPv4 and IPv6 networks.
  • Difficult to unbind Fedora VMWare MAC address.
  • Difficult to create configuration manual due to conflicting and confusing instructions in the Internet community.
future work
Future Work
  • Add a 6to4 Tunnel on the test network connected to the Internet.
  • Step-by-step manual explaining how to configure Fedora Core 7 and Windows Server 2008 (“Longhorn”) in an IPv6 and IPv4 environment.
  • Consistent instructions on how to configure a network that uses different types of tunneling.
  • http://www.ciscopress.com
  • http://www.iana.org/assignments/protocol-numbers
  • http://technet2.microsoft.com/windowsserver/en/library/b2c271bf-abd1-4218-87a9-176dcdd83b1b1033.mspx?mfr=true
  • http://www.onclick.com/it275/2001/fall/frames.htm
  • http://www.ip6.com/us/book/
  • http://www.ietf.org/rfc/rfc1981.txt
  • http://www.ietf.org/rfc/rfc2373.txt
  • http://www.ietf.org/rfc/rfc1884.txt
  • http://www.ietf.org/rfc/rfc2893.txt
  • http://technet.microsoft.com/en-us/library/bb726951.aspx
  • http://download.microsoft.com/download/e/9/b/e9bd20d3-cc8d-4162-aa60-3aa3abc2b2e9/IPv6.doc
  • Leon-Garcia, Alberto and Indra Widjaja. Communication Networks: Fundamental Concepts and Key Architectures. McGraw-Hill Companies, Inc. New York. 2004