随着虚拟专用网的发展,隧道交换技术成了近年来网络安全界研究的热点,但是,目 前还没有形成一个统一的标准,本文对当前的VPN 隧道交换技术进行了分类归纳总结,分析比较了两种不同功能的隧道交换模式各自的优缺点,并以IPsec 隧道为例提出了一体化的设计思路。 关键词:VPN 隧道交换;VPN 实体;IPsec;隧道交换模式; Abstract:Although Tunnel-switching has become of focus of network secure area with rapid developing of virtual private network,there is not a standard .Based on research of current VPN tunnel switching technology ,This thesis analysis advantage and disadvantage of the two modes of VPN tunnel switching,put forward one Integrated Design method based on IPsec. Keywords:VPN tunnel-switching;VPN Entity;IPsec;mode of tunnel-switching;