[RFE] Specific boot NICs for Redfish

[Dmitry Tantsur]

Currently, we tell the BMC to boot from network without indicating which network device to boot. This causes issues e.g. when there are other DHCP servers present (which is not desirable but sometimes happens) or when the firmware does not properly loop through NICs on boot.

Redfish allows booting a node from a specific UEFI device by setting:

System.Boot.BootSourceOverrideTarget = "UefiTarget"
System.Boot.UefiTargetBootSourceOverride = "<UEFI device>"

The UEFI device path can be determined from EthernetInterface.UefiDevicePath of the ports with pxe_enabled=true (I don't think we can support several of them, so it will only apply when one port is PXE booting).

[Sam Schmitt (samcat116)]

This would also be great for systems with many interfaces, where looping through all interfaces (for both IPv4 and IPv6) can take a long time.