More interesting news.
Booting Legacy by Network
undionly.pxe
= fails through to hdd
undionly.kpxe
= hangs at iPXE initialising devices …
undionly.kkpxe
= bg.png 25%
ipxe.pxe , ipxe.kpxe , ipxe.kkpxe
= only looks for link up on net0 (the onboard nic) twice
ipxe.krn
= hangs after loading
realtek.pxe , realtek.kpxe , realtek.kkpxe
= exits after loading
Booting UEFI by Network
ipxe.efi , ipxe7156.efi
= good
realtek.efi , realtek7156.efi , snp.efi , snp7156.efi , snponly.efi , snponly7156.efi
= hangs after gateway ip display
=-=-=-=-=-
Booting UEFI by USB
ipxe.efi , ipxe7156.efi , snp.efi , snp7156.efi
= good
realtek.efi , realtek7156.efi , snponly.efi , snponly7156.efi
= doesn’t detect nic; dhcp fails
=-=-=-=-=-
It’s interesting to see the very different behavior of USB launching vs network.