In reply to Axel P..

500, 300, and 200 Series Switches can be discovered and displayed in the topology if they're connected directly to a 550X, 350X, 350 or 250 series switches. Device explorer, notification and service are not supported, but you can locate the switch in the topology and cross launch the traditional device UI.

Full SNA support is available on 550X, 350X and 350 series switches. 250 series switches can be fully managed by SNA, but the SNA web interface itself is only available on 550X, 350X and 350 series switches. So you will need at least one of these switches in the network to be able to use SNA.

I hope this helps. Let us know if you have any further questions.