After turning off the router, the PC starts up and everything is normal. It can be judged that there is a problem with the router. Check that there are two wires connected to the internal network of the router. Unplug one and test separately. One of the wires is abnormal. It can be judged that there is a problem with this line. In the past, both wires were connected (router: flow). Master of Control)

Plug and unplug the switches one by one, when plugging and plugging to connect the 17-port UK5604-52TC, there is no such phenomenon;Turn on the loop protection and spanning tree of this UK5604-52TC;

The Gigabit electrical port of UK6400-16HC is connected to the diskless PC system to start slowly, and other access layers are connected normally. Example: Connect to the server on port 3 Step 1: Open the WEB page; find the port configuration—port configuration;