power inline auto enables a PoE switch port to detect a powered device, determine its power needs, and allocate the required power automatically. The switch performs detection, classification, startup, and ongoing current monitoring rather than energizing the port immediately. section 10.1.2
Key configuration and operational facts:
- Cisco IOS applies power inline auto by default on PoE-enabled switch ports. section 10.1.2
- Allocation occurs on a first-come, first-served basis; an exhausted switch power budget prevents additional delivery. section 10.1.2
- Use power inline in interface configuration mode to modify port PoE settings; use show power inline to verify status, consumption, class, and remaining budget. section 10.1.2
Verification
show power inline displays the available, used, and remaining wattage, then reports each interface’s administrative mode, operating state, allocated power, device, class, and maximum power.
