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Internet Protocol Version 6
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Internet Protocol Version 6

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IPv6 is short for "Internet Protocol Version 6". IPv6 is the "next generation" protocol designed by the IETF to replace the current version Internet Protocol, IP Version 4 ("IPv4").

IPv6 is short for "Internet Protocol Version 6". IPv6 is the "next generation" protocol designed by the IETF to replace the current version Internet Protocol, IP Version 4 ("IPv4").

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  • 1. IPv6 Internet Protocol Version 6
  • 2. Overview
    • What is Ipv6?
    • Features
    • Addressing
    • IPv6 Packets
    • IPv6 and Domain Name System
  • 3. Why IPv6?
    • In 1991, four things worried the network operators:
      • Router memory exhaustion due to the number of routes.
      • The Network Information Centers (NICs) were running out of Class B IPv4 addresses to assign to new networks.
      • Address exhaustion was forecasted within 10-15 years.
      • Network administration was expensive, error prone and largely manual due to the lack of auto-configuration capabilities.
  • 4. What is IPv6?
    • Network layer protocol for packet switched internet works.
    • Conservative extension of IPv4.
    • Virtually unlimited IP address possible. (Major advantage over IPv4)
    • Originally called as IP Next Generation (IPng).
  • 5. Features
    • Larger address space
    • Stateless auto configuration of host.
    • Multicast
    • Network Layer Security. (encryption and authentication, is an integral part of base protocol)
    • Mobility
    • Supports quality of service (QoS) parameters for realtime audio and video.
  • 6. Addressing :: What’s New?
    • Addresses are 128 bit long versus 32 bit in IPv4
    • Able to support 2 128 (about 3.4×10 38 ) addresses, for each of the roughly 6.5 billion people alive today.
    • In most of the cases NAT (Network address translation) is not required.
    • Makes large networks simpler, by avoiding the need for complex sub netting schemes
  • 7. Addressing :: Notation
    • Written as eight group of four hexadecimal numbers.
    • For example, 2027:0db8:8da3:08d3:1319:8a2e:0370:7322 is a valid IPv6 address.
    • If one or more four-digit group(s) is 0000, the zeros may be omitted and replaced with two colons(::)
    • A sequence of 4 bytes at the end of an IPv6 address can also be written in decimal, using dots as separators.
    • In a URL the IPv6-Address is enclosed in brackets. Example: http://[2001:0db8:0:0::1428:57ab]/
  • 8. Addressing :: Drawback
    • Some Bandwidth overhead over IPv4, which may hurt regions where bandwidth is limited
    • Address are harder to memorize as compared to IPv4 addresses.
  • 9. IPv6 Packet
    • Two main parts: Header and Payload
    • Header is in first 40Bytes
    • The payload can be up to 64KB in size in standard mode, or larger with a "jumbo payload" option.
  • 10. IPv6 and DNS
    • Represented in DNS as quad-A records (AAAA), for forward lookups.
    • Reverse lookup take place under ip6.arpa
    AAAA record fields String form of the IPV6 address as described in RFC 3513 RDATA Length of RDATA field RDLENGTH Time to live in seconds TTL Internet (1) CLASS AAAA (28) TYPE Domain name NAME
  • 11. Refrences
    • http://www.ipv6.org
    • http://www.ipv6forum.com/ - A forum to discuss Ipv6 development, also keeps a time track of when will IPv4 addresses exhaust.
    • http://playground.sun.com/ipv6/ipng-main.html
  • 12. Thank You