Getting Started with the NetApp ONTAP 9 Simulator: Download and Setup Guide NetApp ONTAP 9 Simulator (also known as Simulate ONTAP

If you absolutely cannot get the official download to work, there are two ethical alternatives:

Obtaining and Utilizing the NetApp ONTAP 9 Simulator: A Guide for Educational and Development Environments

Yes. The NetApp ONTAP 9 Simulator is officially to download and use, provided you adhere to the terms.