In ubuntu, you can install grub-ipxe, which adds an ipxe entry to the grub menu. This allows you to easily pxe boot on machines that may not natively support it. You can also use it along with grub2-reboot to remotely re-image a machine. The project has been started here: https://build.opensuse.org/project/show/home:blarson:grub-ipxe
It needs to be tested, and polished before trying to include it into opensuse.