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作为网管的我,周一早上刚上班,就听到了一个非常糟糕的消息:办公楼三楼、四楼所有的计算机都无法上网。办公楼作为学校管理的中枢地带,其重要性实在让我不敢停留,就以最快的速度跑到了现场。办公楼四层共有三十几个用户,采用光纤接入、两台24口交换机级联的方式组成办公区局域网。交换机位于二楼的校办公室内,那里天天有人值班,所以排除了人为破坏的可能。经过观察,各交换机情况如下:带光纤模块的3COM16980 24口交换机上连接的一楼、二楼用户均正常,而级联的3COM16985 24口交换机上连接的三楼、四楼用户不能上网,两台交换机的指示灯显示均正常。
As a webmaster, I just got to work on Monday morning and heard a very bad news: all the computers on the third and fourth floors of the office building can not access the Internet. Office building as a school management center, the importance of it so that I can not stay, as soon as possible went to the scene. The fourth floor of the office has a total of more than thirty users, using optical access, two 24-port switch cascading ways to form the office area network. The switch is located on the second floor of the school office, where people are on duty every day, so ruled out the possibility of man-made damage. After observation, the switches are as follows: 3COM16980 24-port switches with fiber-optic modules connected to the first floor, second floor users are normal, and cascaded 3COM16985 24 switch connected to the third floor, fourth floor users can not access the Internet, two Switch indicator light are normal.