Studies For Realization And Application Of IPv6

With the fast development of network technology,TCP/IP protocol,as the base of the Internet,is undertaking an unprecedented transformation..This article has demonstrated IPv4 will be substituted by IPv6 inevitability by comparing these two kinds of communication protocols.It mainly analyzesed two aspects;with rapid development of internet,traditional communication protocol,IPv4, has exposesed all sorts of flaws,like the shortage of IP address,the low efficiency of route,the deficient service,etc.The improvements and new characteristics of new communication protocol IPv6,according to the flaws of IPv4,like the enormous address space,improved route structure,perfect service gurantee,etc.IPv6 is a long-term solution of setting up a reliable,controllable,safe and effective IP network.It's extremely beneficial to understand and study its principle and unsolved technical problems for establishing long-term plan and future direction for network. This article has thoroughly studied and the analysed part of the IPv6's core criterion and technique,including IPv6 criterion,IPv6 addressing,Neighbor Discovering Protocol, Routing Protocol used in exchanging information among IPv6 routers as well as the transitional technique to solve the coexistenceof IPv4 and the IPv6.At first,this article analyzesed IPv6 protocol,including IPv6 new characteristics, IPv6 package structure as well as comparison with IPv4,IPv6 address system structure, IPv6 route protocol and other important technique.Then the artical discussesed IPv6 transitional technique,especially between the connectivity technique among IPv6 network,namely all kinds of tunnel technique.And based on these,the article compared similarities and differences between IPv4 and IPv6,and further studied the transition from IPv4 to IPv6.It put emphasis on analyzing several mature techniques nowadays; dual stack,tunnel and NAT technique.On the base of former theoretical research and analysis,the article undertook a series of network experiment and programming practice based on the IPv6,analyzed the IPv6 some essential information service technology and the application;the configuration and test of WWW server,FTP server and DNS domain name server on Linux dual stack platform.The successful build of IPv6 network a not only establish solid base for further IPv6 studies,but also accumulate abundant experance for smooth transition from IPv4 to IPv6.