Ensure that PoE is enabled on the switch port connected to the PoE device. Cisco Discovery Protocol (CDP) with power consumption: The powered device notifies the device of the. Once planning is complete, enable PoE using the following CLI steps: Connect console cable and identify COM port. Even after enabling PoE, administrators should monitor, optimize, and prevent common issues. This 2025 guide explains how to enable, verify, and optimize PoE on Cisco switches, including standards, power budgeting, configuration commands, troubleshooting steps, and security recommendations. Detection →. - "auto" enables PoE on all interfaces that support it.