| The current IP protocol is called IPv4protocol. The IP protocol is the most core protocol in the TCP/IP protocol family, and can makes any two computers communicate with each other in the Internet. However, a variety of applications and demands are added to the IP network platform with the rapid development of the Internet. The limitation of the IP protocol is more and more obvious due to the congenital deficiency of its design. As the next generation network protocol of IPv6has many new features, such as huge address space, efficient header, good scalability, efficient routing, better QoS, built-in security, and the enhancement of mobile IP technology. These are greatly meeting the demand of users in the network, and also determine the necessity of the transition of IPv4to IPv6.The full realization of transition from IPv4to IPv6will take a long time, due to the size of the network and a large number of IPv4users and devices in the network. Moreover, many enterprises and users increasingly depend on the Internet in daily work, and they cannot tolerate the problems of the protocol during the transition. Thus, the smooth transition from IPv4to IPv6becomes a key factor for the success of IPv6in the current IPv4-leading network environment.Compared with IPv4protocol, the basic principle and new characteristics of IPv6are introduced firstly in this paper. A research on dual stack, tunneling, translation of the three basic IPv4/IPv6transition technologies is made. Use OPNET to run simulation on the network communication of the three basic transition technologies, and GNS3to realize network planning and design. The results of simulation and the complexity of network planning are analyzed.Drawing the following conclusions according to the above analysis. Dual stack technoloey is simple configuration on a single device, however it is difficult to implement. Tunnel technology is relatively use auto configuration to realize tunnel configuration, and don't need to change the most of network devices. Translation technology only needs the translation devices to be configured and without changes other network devices. However, the translation technology is complex configuration. Hot transition technologies are also researched.6RD can be deployed in the early stage of network transition, which can meet mainly services of IPv4and small number users of IPv6; DS-Lite can be deployed in the medium-term and late stage of network transition, which can meet the users and ISP that mainly services of IPv6and compatible with IPv4services; IVI can be deployed in the early and late stage of network transition, which is suitable for the edge networks and small and medium network deployment. Thus, a new combination program of6RD+DS-Lite+IVI is proposed, which can meet the demand of users form early to the end of IPv6transition. |
