Windows 8/Server 2012

[robinsmidsrod]

hech: About the realtek motherboards. I noticed you were using undionly.kpxe. You might've had more luck with ipxe.pxe, as that would've used a native iPXE Realtek driver. Your issue with a broken MAC might be related to buggy behavior in the onboard PXE firmware. If you specifically cold-boot the machine and boot it using ipxe.usb (from a USB stick), does it still give you all zeros MAC? If that works, but ipxe.pxe loaded using chainloading does not, then it is pretty obvious the built-in firmware has a problem. If only undionly.kpxe ends up giving you an all-zeros MAC, then ipxe.pxe might be possible to use (if you control all the nodes in the network and it turned out to work). Just make sure you cold-boot your machines during testing. Warm reboot has been known to give false test results. Unplugging the power cable is usually the safest choice (because of how Wake-On-Lan works) to ensure you get a proper cold-boot.

Also, I noticed your root-path in your DHCP setup is just an IP address. AFAIK, that won't work with iPXE unless you're using a specialized iPXE script. If you meant to boot the iscsi target, you need to put the full IQN address to the target there.