1. Expectation for IPv6 Dec.19th, 2000 Noriyuki Kishikawsa NEC Corporation

2. Operational Issues : IPv4 l IP Address exhaustion on rapid growth n Restriction of RFC 2050 –25% immediate utilization rate –50% utilization rate within 1 year l Increase of Routing Information n EGP90000 Routes n IGP l Multihoming issues: EGP/IGP design l Explosion of Traffic volume l Increase of Managed Objects

3. IPv6’s Operational Merit l No need to consider IP Address Utilization n Free from RFC 2050 n Less Restriction of IP address Design –65535 (/48) Networks per User –Unlimited address assignment in each segment

4. IPv6’s Operational Merit l IP addressing architecture based on Aggregation n Categorized in 3 Level Routing –Top Level13bit –Next Level24bit –Site Level16bit Site Level Only routing Information Next Level Only routing Information TOP Level Only routing Information

5. IPv6’s Operational Merit l Multi prefix assignment for each site n ISP has no need to care specific prefix n Users don't be bound to one ISP l Flow based high speed switching for stream application n InterDomain QoS  Intra domain QoS =MPLS n End to End QoS

6. IPv6’s Operational Merit l Easy Operation result in Cost down n Avoid missconfiguration –Plug and Play n Only power on –Remote configuration after that

7. Operational Issues : Current IPv6 Networks l Routing Protocol Current Practice － RIPng or BGP4+ -> Enough scalablity? l Stable service transition? l Nightmare of management n Lack of management tools –SNMP Manager,DNS tools etc n IPv6 network management through IPv4 network? l Transition Process?

8. Transition Process l Premise n IPv6 will make a different world n IPv6  IPv4: a few application –Application which must be translated is only Mail and Web in current day

9. IPv6 Network Structure : Now IPv6 IPv6 over IPv4 IPv4  IPv6 Application Gateway Web proxy Mail GW Dual-Stack Host IPv4 Web Host World Wide IPv4 IPv4/IPv6 - 100 User IPv6 over IPv4

10. IPv6 Network Structure : Future IPv4 Web Host World Wide IPv4 IPv4/IPv6 IPv6 Function Switch IPv4/IPv6 Application Gateway Cellular Phone Network