@russel0901 Well lets dig a little deeper into what the pxe booting client is being told. Please follow the instructions here to create a network capture of the pxe booting process. This tcpdump command will only collect pxe booting traffic. Please run the commands and then upload the pcap to a file sharing site (google drive, one drive, etc.) and post the link here or IM myself or Sebastian the link so we can take a look at what the pxe booting client is being told.
https://forums.fogproject.org/topic/9673/when-dhcp-pxe-booting-process-goes-bad-and-you-have-no-clue