The Policy Research Of Campus Network Transition From IPv4 To IPv6

With the development of Internet, Internet based on IPv4 has exposed much disadvantage in practical application, such as the address space exhausting day by day, service quality , net security, etc. These questions restrict the development of Internet badly, and these questions are solved completely and effectively only through the construction of next generation Internet, so IPv6 has arisen. As the next edition of Internet protocol, IPv6 replacing IPv4 becomes inevitably trend of technology, the new characteristic of IPv6 protocol will offer broader prospect and perfect support for application and development of the next generation Internet.IPv4 replaced by IPv6 couldn't be brought to success in one night that, they will exist within a very long time. IPv6 isn't simple upgrading edition of IPv4, because of the difference of head characteristic and address format, they are unable to be totally compatible. It must be solved how to transit to IPv6 gradually and smoothly, as the next Internet Protocol, IPv6 have already got much application in Internet, but a lot of questions must be improved and perfected, the complete transition from IPv4 to IPv6 need very long time still, different network structure will have one's own transition policy too.It is introduced that IPv6 protocol at first, including IPv6 new characteristic, the data form of IPv6 and comparison with IPv4, IPv6 address system structure, ICMPv6 protocol, neighbour discover mechanism, IPv6 route protocol, IPv6 safe mechanism: IPSec, etc. Then the idiographic scheme are introduced in detail against different problems in transition period, including dual protocol stack, the tunnel technology, translating mechanism. In order to realize campus network transition from IPv4 to IPv6, one IPv6 scheme based on soft route is introduced, and has carried network experiment on Linux systematic platform , has disposed some application services which support IPv6 protocol: such as WWW, FTP, DNS, etc.Finally, the further expecting to the development prospect of IPv6 is brought forward.