Use the iPXE as an UEFI Application

[Hudson]

Hi,
I tried to use the iPXE as an UEFI Application to install the Ubuntu from PXE Server, which will running from my BIOS integrated UEFI Shell.

For the PXE Server part, it is already configured with the UEFI PXE Server, and I have tried with the BIOS integrated PXE boot options, the server works well.

But when I run the iPXE.efi Application, I could see the NIC card was configured, and could obtain IP Address from the DHCP Server, and then could fetch the BOOTX64.efi from the TFTP Server.
But after the iPXE begin to execute the BOOTX64.efi, it will stop at the GRUB command line, and I checked the network connections from the Server part, the connection was lost.

I want to ask that if my usage of the iPXE as UEFI Application is correct?
And if anyone know how should I handle this issue for the next step.

Thanks.