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Negotiating PoE+ Power in the Pre‑Boot Environment
Solving a boot-time power challenge on PoE+ x86 systems by creating our own UEFI app to handle LLDP power negotiation at the firmware level, allowing our machines to request higher power from network switches before the OS loads.
These were full Windows 10 Professional machines running Intel Atom processors, designed to simplify deployment by drawing power directly over Ethernet. If someone out there is working on a similar challenge, or even just wants to understand how UEFI applications can be used to control networking behavior at boot, I hope this gives them a useful head start. If it sparks ideas, helps someone overcome a similar obstacle, or contributes in any way to future PoE-powered system design, that’s all the reason I need to put it out there.
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