Help for a network dimwit (Cisco switch, eeros, subnet masks, DAC not appearing etc.)

Oh, I missed that part! :relaxed:

Not generally a good idea to have your Roon Nucleus and NAS connected over WiFi to your Bartok. Even if you resolve the subnet/broadcast address space issues, it’s bound to lead to all sorts of problem over the long run. Ideally, they should all just connect via Ethernet cables to your Cisco switch.