Failed to burn ipxe rom to NIC

[robinsmidsrod]

You haven't specified what kind of NIC you're trying to update the ROM for. Once you know that you need to find the PCI vendor/device numbers and build VVVVDDDD.efirom instead of ipxe.efirom. The message also seems to suggest that you're dealing with a LAN-on-motherboard adapter, and those usually can't be flashed directly. You need to include the iPXE EFI ROM into your BIOS image, which is usually risky and can potentially brick your motherboard if you do it wrong. It is generally not recommended for beginners. Chainloading is much safer and usually easier. See http://ipxe.org/howto/chainloading for details.