三种IPv6技术研究及性能仿真

s the next generation network protocol, IPv6 protocol has more network addresses, more efficient routing, and can provide better QoS, which will greatly improve the network performance and meet the network needs of users.But IPv4 has a large user base and associated devices, so replacing them all is too expensive to be realistic.Therefore, the smooth transition from IPv4 to IPv6 has become a key factor in the development of the Internet. Three typical IPv6 transition technologies, namely dual stack, tunnel and NAT-PT, were studied in this paper.Dual stack technology refers to the use of both IPv4 and IPv6 protocols in network device nodes and the selection of which protocol stack to use for data processing by judging the message version number.Tunneling technology refers to encapsulating IPv4/IPv6 data in IPv6/IPv4 data packets for transmission, and unencapsulating the data after reaching the exit of the tunnel for further transmission.Nat-pt technology, also known as address translation technology, maps IPv4/IPv6 addresses to IPv6/IPv4 addresses through address translation devices, so as to complete the data transmission of the same network protocol stack. Finally, OPNET software was used to simulate it. By analyzing the simulation results and practical factors, it could be concluded that the transition time of dual-stack technology was long and required a lot of manpower and material resources, but the network after the transition was inheritable and hadbetter performance.The realization of translation technology is complicated, which requires special network equipment and complicated configuration.Tunneling technology is simple to implement, but if the network traffic is too heavy to cause network equipment to crash.Each of the three transition technologies has its advantages and disadvantages, which determines that different transition technologies should be used in different periods of transition to achieve the highest cost performance.