What ONEP adds.
Ready environments, images it can identify, and a way in for the files you already have.
Built for your own box.
Every image is identified from its hash and filed by maker, version and device type. Each one gets a single sizing decision, and a deploy that will not fit says so before it starts.
Ready environments are built on your box from each project's own source. Describe a network in English and get a topology on the canvas, using the model you connect. Import EVE-NG, GNS3 and Packet Tracer files on every edition.
How migration works Editions