Transcript 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 IPv4 supports 232 addresses • That’s approximately 4 billion IP addresses IPv6 supports 2128 addresses • That’s approximately 3.4 * 1038 addresses 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. 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 IPv6 Address Types Unicast Multicast Anycast Functions Neighbor Discovery Router Discovery Stateless Autoconfiguration • Duplicate Address Detection Path MTU Discovery • No fragmentation IPv6 Routing Routing Protocols • RIPng • OSPFv3 • IS-IS Extensions for IPv6 • MP-BGP • EIGRP for IPv6 • Static Routing 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 Transition Mechanisms Dual Stack Backbones IPv6 over IPv4 Tunneling IPv6 over Dedicated Data Links For More Information http://www.cisco.com/en/US/product s/sw/iosswrel/ps5187/products_confi guration_guide_chapter09186a0080 1d65f5.html#wp1154533 Try it out! The CCIE pods (CCNA pods 1-8) and some of our other pods support IPv6!