@StefanTS@george1421 I did recently ask the iPXE guys about network booting… They said something to the effect of - not all filesystems support being accessed over HTTP, and they recommended mounting the ISO as read only via NFS, and then having the boot menu entries point to that.
See that’s where we need a bit of clarification on the OP post. Looking at the additional information provided, I don’t see any reference to an ISO in his commands (even though he did mention it in his OP) What I see from his commands are sending the kernel and init file system to a target machine via a menu item, much like how FOG works. But then he also mentions tasks and the task type table. Which makes me think he might be trying to deploy this to a client machine and not via the FOG ipxe menu as I originally thought.