三层交换机时间域反射测试TDR的设计实现

Design and Implementation of TDR Module on L3 Switch

交换机设计中必须保证被正确端接的网线不出现故障,一旦线路出现问题,需要迅速定位故障的位置。一种新型的电子测量技术-时间域反射测试TDR(Time Domain Reflectometry),近年来开始被用于各种物体形态特征的测量和空间定位。本文引入TDR技术,在三层交换机的设计中采用时间域反射测试技术对其进行了系统实现。实验与测试结果表明,采用了该技术能够快速定位交换网络中的线路故障,对于旧型号交换机改造、设备的增值开发和提高现有三层交换机性能具有重要意义。

When switch designing,we must guarantee the correct termination of the network cable is not failure. Once the line prob-lems,we need to quickly locate the location of faults. A new type of electronic measurement technology-Time Domain Reflectometryreferred to as TDR,for many years,has been used for the measurement of morphological characteristics of various objects and spatialorientation. This paper introduces the TDR,achieves the system using the test technology of TDR in designing L3 switch. Experimentand test results show that the TDR technology can quickly locate the line fault in switching networks. Take great significance to theolder model switch transforming,as well as value-added development of existing equipment and improving the performance of existing L3 switch.