Research Of Mutual-Connection Between IPv4 And IPv6 Based On Linux

Due to the rapid progress of INTERNET and the growth of its users,there is a serious lack of old IPv4 addresses,which necessitates the transition of IPv4 to IPv6.But IPv4 has been implemented successfully at INTERNET for over 20 years and has a set of matural environment of software and hardware.lt could not be replaced by IPv6 rapidly in a short time.So there has to be a long time for the two protocols' co-existence.How to secure a stable transition will be a serious problem for us to solve.Linux,as a popular and opening-source-code operating system, will probably become a principle operating system and a main running environment of IPv6 in the future.The thesis mainly probes into a transition plan from IPv4 to IPv6 ,with a special focus on the basic mutual-connection problem.The thesis provides some conclusions through the tests and verification which are based on some new viewpoints.The thesis firstly gives the reason for the introduction of IPv6,the history of IPv6 and the peculiarity of IPv6.It also compares some other transition techniques of solving the address problem.Then it contrasts and analysizes the packet head and address of IPv4 and IPv6,all of which are the base of the mutual-connection experiment. After that the thesis introduces the co-existing tactics of IPv4 and IPv6,and some new technologies that are effective now .Then it probes into the transition schemes of network equipments and ISP. Lastly the thesis introduces how to implement the mutual connection of IPv4 and IPv6 based on linux in different kinds of LAN environments and how to implement the mutual-connection between IPv6 LAN through tunnel techniques.The thesis gives a series of feasible conclusions which have been verified by experiments in the end.