How to boot Raspberry Pi 4 UEFI Firmware from PXE?

[lygstate]

By having this feature, we could have two step boot procedure, first booting the UEFI Firmware,
Then we can boot everything else, and we doesn't need the
SD card anymore.

[samerhaj]

Check the instructions here for stateless boot from PXE (for ESXi-Arm). You can extend the instructions to other OSes

[andysan]

Another option is to use iSCSI for the root file system. I have been using that successfully on a PI for a few days. Unfortunately, iSCSI was dropped in 1.22, but will likely be re-added in the next build (see #125). For simple setups (especially if you have a NAS that already supports running as an iSCSI target), that might be a lot easier to configure that PXE (custom DHCP options, TFTP server, etc.). If you configure the iSCSI initiator (~client) in UEFI correctly, the remote disk shows up like an ordinary local disk at boot.

[samerhaj]

The information in this issue seem to be sufficient. I will go ahead and close the issue. If you still have problems, please re-open or open a new issue.