I have still problem with configuring maas/juju. And I want to know what is best configuration(simplest) for maas/juju? If someone have graphic of it I will be happy.
You can check out the documentation for MAAS online too if that helps. MAAS assumes you have several nodes, and the easiest configuration would be for these to be in a separate subnet with DHCP controlled by MAAS.
I'm not entirely sure what you expect a diagram to show you. If you could explain a little more what you are trying to do or what you expect a diagram to show, we may be able to help you further.