Troubleshoot and resolve Layer 1 problems.
We finish the troubleshooting section with Layer 1. The physical layer is often the reason a network issue exists—power outages, disconnected cables, power cycled devices, hardware failures, and so on. So let’s look at some of the troubleshooting tools available to you, in addition to actually walking over to the wiring closet or network device and “physically” checking Layer 1.
Besides failing hardware, other common physical layer issue occurs with media. The following are a few examples:
New equipment is ...