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IPv6 Chris Wester Dan Keenan Derek Brown

IPv6 Chris Wester Dan Keenan Derek Brown. Introductions. Chris Wester Daniel Keenan Derek Brown. Outline. Introduction to IPv6 Addressing Notation Special Addresses Quick Mentions Packets Deployment. Introduction.

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IPv6 Chris Wester Dan Keenan Derek Brown

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  1. IPv6Chris WesterDan KeenanDerek Brown

  2. Introductions • Chris Wester • Daniel Keenan • Derek Brown

  3. Outline • Introduction to IPv6 • Addressing • Notation • Special Addresses • Quick Mentions • Packets • Deployment

  4. Introduction • The creation of IPv6 began in 1996 as IPv4 would not have enough addresses. • IPv6 will be backwards compatible, but IPv4 servers won’t be able to communicate with IPv6 computers/servers.

  5. Addresses • IPv6 uses 128 bit address (16 bytes). • Ipv4 only uses 32 bits (4 bytes). • So your 192.168.0.1 address will look like: 2001:0db8:0000:0000:0000:0000:1428:57ab - Notice that it is in hexadecimal format.

  6. More on Addresses • Two parts: the host portion and the network portion. • Each portion of the address is 64 bits. • Privacy has been increased due to the large number of addresses.

  7. Number of Hosts • IPv4 has a maximum of 232 addresses • 4,294,967,296 addresses • IPv6 has a maximum of 2128 addresses • 340,282,366,920,938,463,463,374,607,431,768,211,456 • Roughly 5 x 1028 addresses for every person on Earth.

  8. Notation of IPv6 Addresses • 8 groups of 4 hexadecimal digits. • Example: 2001:0db8:85a3:08d3:1319:8a2e:0370:7334 • If a group has all 0’s (0000) they can be rewritten as :: (two colons). • Leading 0’s can be deleted as well.

  9. Example • 2001:0db8:0000:0000:0000:0000:1428:57ab • 2001:0db8:0000:0000:0000::1428:57ab • 2001:0db8:0:0:0:0:1428:57ab • 2001:0db8:0:0::1428:57ab • 2001:0db8::1428:57ab • 2001:db8::1428:57ab • The above are all the same address.

  10. Special Addresses • There are a number of addresses with special meaning in IPv6: • ::1/128 - the loopback address. Similar to 127.0.0.1 in IPv4 • ::/96 - the zero prefix used for IPv4 compatible addresses. • ::ffff:0:0/96 - this prefix is used for IPv4 mapped addresses.

  11. More Special Addresses • fe80::/64 — The link-local prefix specifies that the address only is valid in the local physical link. • This is the same as the Auto-configuration IP address 169.254.x.x in IPv4.

  12. More Special Addresses • fec0::/10 - This site-local prefix specifies that the address is valid only inside the local organization. • ff00::/8 – The multicast prefix

  13. Quick Mentions: • Auto configuration: A DHCP server is no longer necessary unless the host wants to manually set it up.

  14. IPv6 Packet Header

  15. More on Packets • Packetizing is only performed by the hosts in IPv6 (routers never touch it). • Application layer address (in the next header field) replaces the IPv4 protocol field.

  16. Deployment • ICANN root DNS servers switched to being able to handle IPv4 and IPv6 in the summer of 2004. • The US government has mandated that all civilian and military computers use IPv6 by the Summer of 2008.

  17. More on Deployment • Windows XP has optional support for IPv6. • Windows Vista has IPv6 built in by default. • OS X has IPv6 built in by default. • Linux / Unix has modules for IPv6

  18. Where is IPv4 Now?

  19. References Wikipedia.org http://en.wikipedia.org/wiki/IPv6 IPv6.org http://www.ipv6.org/ IP version 6 http://playground.sun.com/ipv6/

  20. Questions?

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