IPv6 is known as the next generation Intemet Protocol. This essay gives a brief introduction of technical evolutions IPv6 has made over IPv4. The transition mechanisms and techniques, especially the dual stack method is fully discussed while the 6-Bone experimental test bed and the future of IPv6 is given in the last part of the paper.%给出了IPv6针对IPv4的主要技术改进，详细讨论了由IPv4向IPv6过渡的演进机制和方法，特别是双协议栈技术问题。文章最后简要介绍了IPv6的测试平台6-Bone。
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