PXE Boot when UEFI Network not working

Idea

My solution was to build a customized iPXE 3 bootloader image with an embed script that fetches the actual boot instructions. This iPXE image was then signed and placed in the EFI system partition on the emmc as ESP/EFI/BOOT/BOOTX64.EFI. I may make a more detailed guide to this at some point in the near future.

https://forum.radxa.com/t/cant-seem-to-pxe-boot-uefi-network-stack-not-working/4571/18

Resources

https://ipxe.org/download

Why efi/boot/bootx64.efi ? Matthew Garrett explained it here https://mjg59.livejournal.com/138188.html

Troubleshooting

• same problem on forum https://forum.ipxe.org/showthread.php?tid=13245

• bootx64 is bad

• ipxe options should be added to nvram https://wiki.gentoo.org/wiki/Efibootmgr

sudo efibootmgr -c -d /dev/sdb -p 1 -l '\EFI\ipxe.efi' -L "iPXE"