Hey  @Hosdal,

You have the exact right solution for your situation. Anything placed behind the Deco router will use the naming IP addressing of the router as the router is what is providing this service, not the modem. Your best solution is to use one ethernet port on your modem -> connect to Deco -> Connect Switch to Deco -> PC and Other Devices

  @Hosdal,

Just for your information regarding network switches, if you haven't already made your purchase. I highly recommend purchasing a managed ethernet switch as these devices have their own interface for more advanced settings such as QoS across the ethernet ports. Otherwise, a simple switch will just forward the signals onto the main network evenly, as if the switch didn't exist.