The Policy Routing mechanism Under the Linux can select routing according to the destination address, the source address, the characteristic of application layer data port and so on. Moreover with the assistance of the traffic control tool TC, the function is powerful. Linux下的策略路由机制可以根据目的地址、源地址、应用层数据端口等特征来进行路由选择,而且有相应的流量控制工具TC辅助,功能比较强大。