So, how do you efficiently download and manage all these images without losing your mind? First, a hard truth: You cannot mass-download "all" images from a single, official source. EVE-NG does not host Cisco, Juniper, Arista, or Microsoft images due to copyright and licensing. You must legally obtain these images, typically via a support contract (Cisco.com, Juniper.net) or evaluation trials.
To get started with the open-source stuff:
However, there is a common frustration that every EVE-NG user faces on Day 1: When you first install EVE-NG (Community or Professional), the platform is a shell. It has the engine, but no fuel. That fuel is the images —the IOSv, vEOS, XRv, vSRX, and Windows ISOs that run your nodes.