Pxe error, operation not supported, 3c1260003
This is resolved, just posting in case someone getse this error. I read through the threads and found many spots where your asked to rename move, and try differente pxe files. It turned out SELINUX was enabled on the fog server and blocking acces to the tftp file, which generated the operation not supported with the error code.
So… check your firewall and selinux when getting boot errors.