The application of the multi-segment pseudo-wire (MS-PW) network can be divided into two methods by the routing method of PW Switching Provider Edge ( SPE): static configuration mode and dynamic pw-routing mode. In order to highlight the focus of MS -PW networking,mainly analyzes the process of the signaling for the establishing and maintaining to each types of MS-PW. In order to verify the realization of MS-PW system, use SmartBits as the simulation tool to test. The result of simulation shows that the function of routing and forwarding for the SPEs is correct. So the research and realization of MS-PW is correct and feasible.%多段伪线路(MS-PW)组网的实现按伪线路交换结点的运营商边界网络设备(SPE)实现伪线路路由的方法可分为静态配置方式和动态伪线路路由选择两种方式.为突出实现多段伪线路组网的关键,主要对各种类型的多段伪线路创建与维护的信令交互过程进行分析；为验证多段伪线路体系实现的正确性,使用SmartBits协议分析工具对多段伪线路的组网进行仿真测试.仿真测试的结果表明,对多段伪线路体系的研究与实现是正确、可行的,SPE能实现数据在伪线路段间的正确路由与转发.
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