Abstract: Hierarchical mobile IPv6 for inter-domain switch to the problem of long delay，a dynamic switching mechanism MAP hierarchical mobile IPv6 model，in the tree MAP network environment，through dynamic changes in the current registration of mobile node MAP，avoids the emergence of inter-domain switch，and effectively shares the MAP load，shortens the transmission time of registration information in the network，reduces switching delay.Through NS-2 network simulation experiments，the success validates the effectiveness of the mechanisms.

摘要： 针对分级移动IPv6进行域间切换延时过长的问题，提出了一种动态切换MAP机制的分级移动IPv6模型，在树状MAP的网络环境中，通过动态地改变移动节点当前注册的MAP，避免了域间切换的产生，并且有效地分担了MAP的负荷，缩短了注册信息在网络中传输的时间，减少了切换延时。通过NS-2网络模拟实验，验证了机制的有效性。