IPv6是用于取代现行互联网协议IPv4的新一代互联网协议,这是一种没有上限的网络基础资源,可以彻底解决IPv4地址不足的问题。但由于IPv4与IPv6之间存在着很大的差异,同时存在众多基于IPv4协议的网络及应用,因此,要用新的IPv6代替旧的IPv4必然存在一个过渡时期。重点分析实现从IPv4网络迁移到IPv6网络的过渡机制。 IPv6 is a new generation internet protocol that replaces IPv4, the current Internet protocol. This is a network-based resource with no upper limit and can completely solve the problem of insufficient IPv4 addresses. However, due to the great difference between IPv4 and IPv6, there are many networks and applications based on the IPv4 protocol. Therefore, there must be a transitional period to replace the old IPv4 with new IPv6. Focus on the transition from IPv4 network to IPv6 network transition mechanism.