Comment 11 for bug 1229458

> It appears that bootx64.efi finished loading grub, released the
> IP, got the reply for the release, and launched grubx64.efi

That sounds buggy to me, why should shim release the IP instead of leaving it provisioned in firmware? I'm sure we do still need grub fixed to correctly dhcp in the case where no IP is configured, but it's surely less than ideal for netboot to require up to 4 DHCP round trips (firmware, shim, grub, linux) if the results could be stashed in firmware.