换机是IP 城域网中不可缺少的一部分，大量的二层和三层LAN 交换机通过GE

或FE 相互之间进行连接，构成了IP 城域网的平面网络。在城域网日常维护工作中，经常

会遇到一些交换机故障，但事实上，LAN 交换机是比较稳定的设备，许多故障的产生的原

因都是由于交换机与交换机，交换机与光纤收发器之间的网线引起的，网线制作不标准，网

线皮破损，RJ45 头没压好，都会产生一系列的问题，而这些问题在初期并不会很明显的体

现，往往在设备运行的过程中才会慢慢显现出来，下面就我们日常工作中遇到的一些问题和

处理过程和大家探讨一下。-IP MAN LAN switches are an integral part of the large number of second and three LAN switch through the GE

Or FE are connected with each other to form a flat IP network MAN. Routine maintenance work in the metropolitan area, often

Encounter some switch failure, but in fact, LAN switches, the device is relatively stable, the production of many of the original fault

Are due to the switch and the switch because the switch and fiber optic cable between the transceiver caused production of non-standard network cable, network

Line of skin damage, RJ45 head did not press well, will have a series of problems, and these problems will not be obvious in the initial body

Now, often in the course of operation of equipment will slowly emerge, following on our daily work and some of the problems encountered

And to discuss our process.