In the early 1990s, some people wony about the IP address space will be not enough within 10 years, which led to the development of IPv6. Compared with IPv4, IPv6 has more advantages and features, therefore, IPv6 is bound to replace IPv4. However, due to the broad applicationfoundation of IPv4, it is a long and difficult process for the transition from IPv4 to IPv6, and thus, IETF has come up with lots of transition technology.Here, NAT-PT transition mechanism is made comprehensive research from the principle and configuration.%90年代初就有人担心10年内IP地址空间就会不够用,并由此导致了IPv6的开发.由于IPv6与IPv4相比有着更多的优势和特点,因而IPv6必然会取代IPv4.然而由于IPv4的广泛的应用基础,从IPv4到IPv6的过渡是一个漫长艰难的过程.对此,IETF已经研究出很多过渡技术.在此,从原理和配置方面综合研究NAT-PT过渡机制.
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