We have a simple network (Ethernet Gigabit) for about 100 people, in a 3 levels building. Since a few weeks, we found that some of our cables (RJ45, cat 5e) are not working anymore : when they are plugged into computers, the LEDs on the connector are blinking on / off, and the network is no more found on the computer. On the switch side, the LEDs are absolutely not blinking anymore (for the failing cable).
If I plug a simple switch between my computer and the cable I found that the signal seems stronger and then the connection works.
We are planning to install trunking between the switches on different floors, would it improve that kind of problem ? If not, what could we do ?