I finally solved the horizon error, the port number was different.

I don't know why the port was changed, but anyway the port number was 8080, not 80.

But I'm now facing new obstacles, Duplex PXE Booting.

I succeed to connect PXE mode, but no more process..

In Controller-0, I can find below result,

And another node that should've been controller-1, shows below letters on the display.

I waited this task for a day, but no changes.

Any help would be very appreciated.

Best Regards,

Jaewook.