@Pyrol said in FOG Kernel update: "Preparing to move to tftp server":
and the final step was to go into WebGui>fog settings>tftp server
and here changed bzImage to bzImage.64 the same with bzImage32
I would back up to this step. Replace the existing bzImage with the .64 bit one keeping it bzImage and the 32 bit image should be named bzImage32 (watch your case because it is important). Leave everything else FOG defaults. It will save you headaches in the future. Then pxe boot the client once you are on 5.6.18 it will see the network adapter.
Then we can look back to why the update process is not working as it should. What version of FOG are you running?