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IPv6

IPv6. Extending the IP protocol towards the future. Andrew Zorowitz 4/26/05. Why IPv6?. Running out of IPv4 Addresses Random assignment of IPv4 Addresses IPv4 designed for a much less robust global network. Designed with security and QoS in mind. Address Pool Sizes.

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IPv6

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  1. IPv6 Extending the IP protocol towards the future. Andrew Zorowitz4/26/05

  2. Why IPv6? • Running out of IPv4 Addresses • Random assignment of IPv4 Addresses • IPv4 designed for a much less robust global network. • Designed with security and QoS in mind.

  3. Address Pool Sizes • IPv4 supports 232 addresses • That’s approximately 4 billion IP addresses • IPv6 supports 2128 addresses • That’s approximately 3.4 * 1038 addresses

  4. Why not yet? • Lack, until recently, of IPv6 routing protocols. • Cost of equipment upgrades. • NAT and DHCP have extended useful lifetime of IPv4, but the value of both of those is quickly ending.

  5. Addressing Format IPv6 addresses are shown in the format: 1343:4326:34D3:0000:0000:3BC3:2354:0054/48 or 1343:4326:34D3::3BC3:2354:54/48

  6. IPv6 Address Types • Unicast • Multicast • Anycast

  7. Functions • Neighbor Discovery • Router Discovery • Stateless Autoconfiguration • Duplicate Address Detection • Path MTU Discovery • No fragmentation

  8. IPv6 Routing • Routing Protocols • RIPng • OSPFv3 • IS-IS Extensions for IPv6 • MP-BGP • EIGRP for IPv6 • Static Routing

  9. Differences Between IPv4 and IPv6 Routing • Interface based as opposed to network based. • Uses link-local addresses for identifying machines • Not enabled by default on Cisco routers • Enabled with the command: ipv6 unicast-routing

  10. Transition Mechanisms • Dual Stack Backbones • IPv6 over IPv4 Tunneling • IPv6 over Dedicated Data Links

  11. For More Information • http://www.cisco.com/en/US/products/sw/iosswrel/ps5187/products_configuration_guide_chapter09186a00801d65f5.html#wp1154533 • Try it out! The CCIE pods (CCNA pods 1-8) and some of our other pods support IPv6!

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