@john-l-clark said in Lenovo L13W Yoga not booting to FOG:
Ok I have found with the MAC passthrough in the Bios turned on we are not able to boot to FOG unless we were on the same subnet.
This is interesting. My intuition is telling me it might be an MTU issue. We have seen that with tftp, Where (typically) on the other side of a VPN WAN link the MTU of the data packet is less than the block size of tftp. The block size of 1468 comes to mind for tftp. When the network MTU dips below that level it causes fragmentation of the tftp packet, then the transfer fails.
Using the instructions I provided before for collecting a pcap on the fog server, you are interested in udp port 69. Start the packet capture and then pxe boot the target computer on the remote subnet. See if it attempts to contact the fog server. The tftp query will be 2 times before data is transferred, the first time the client queries the tftp server on the size of the file and the second time it asks for the file. My bet is that it will ask for the file size, but then the file is never sent.