This guide provides a step-by-step troubleshooting framework focusing on Cisco Catalyst switches (notably the 9300 and 2960 series), covering error categories, CLI commands, model-specific insights, and preventive measures. Power over Ethernet (PoE) simplifies device deployment by delivering both data and power over a single Ethernet cable. Despite their versatility and efficiency, these switches can encounter several issues that disrupt operations. PoE errors on the device seen on CLI. When a problem occurs with PoE, in most cases, the error symptom can be simply shown as the PoE switch not providing power, and the powered devices will stop.
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