UEFI-PXE boot to grub2 with BIOS configured VLAN tagging?

[Christian Rohmann]

Hello help-grub,

I am attempting to PXE boot a HP DL380 Gen9 server using UEFI PXE with a 
VLAN tag configured in the BIOS. In this care the connection goes via 
the machines 10Gig NICs.

The DHCP request and resulting TFTP download works fine (using tagged 
frames in the configured VLAN).  But then, after 1 to 3 minutes, 
grub2efi crashes to the rescue shell throwing: "timeout cannot resolve 
hardware address" not downloading or even showing the menu.

net_ls_cards and net_ls_addr reports the network cards and the IP 
address received via DHCP. I can even remove and re-add the IP address. 
But apparently where is nothing regarding the VLAN.
Is this part transparent to Grub and handled in the UEFI or is this kind 
of setup just not currently supported?



Regards

Christian