PoE detection protects non-PoE devices by applying a low voltage to determine whether a connected device can safely accept power. It precedes classification, startup, and normal operation. section 10.1.2
The PoE power-up sequence is:
- Detection checks whether the connected Powered Device can handle PoE. section 10.1.2
- Classification assesses power requirements and allocates power from the switch budget. section 10.1.2
- Startup supplies the appropriate voltage; normal operation continues delivery while monitoring current. section 10.1.2
Verify detected PoE devices
Use show power inline to inspect port status, operating state, allocated wattage, device identity, class, and remaining power budget.
