Troubleshooting Power over Ethernet (PoE)

Scope and location

Historical Catalyst guidance distinguishes power reserved by the source from device consumption and describes cable losses and changing allocations.

Power budget / Power allocation / IEEE 802.3af powered devices

Open the original source

Inspected

2026-10-03

Access

public page

Recorded AI-assisted source inspection; not independent human approval or hardware testing.

Historical Catalyst guidance only, not a current switch endorsement or a universal modern control algorithm. No device commands reproduced.

Source inspection is separate from independent technical approval, rights clearance and hardware testing.