@CMsc It looks as if Deco units can't keep gigabit speed through that cat6 cable and downgrade it to 100Mbps. I would suggest the following: configure Deco mesh to run in Access Point mode and, then,...

@ArjanBr As I said, it is not possible in Deco to block new clients that have correct WiFi SSID/password. The workaround is to switch Deco mesh to run in Access Point mode. See How to set up Deco to...

@JGO1 Have you tried connecting printer to the following: Guest network: 2.4GHz only, no password ------ If that does not work, repeat the same but with one more addition: Guest network: 2.4GHz only,...

@Lous Your Satellite Deco are connected with Ethernet backhaul. They can use Ethernet cables, so we can assume these cables are fine. Next troubleshooting step. Have ISP Router in default router...

@Lous This is simple and straightforward setup, it should work. Because it does not, I would suggest you try troubleshooting steps to narrow down where the problem actually is. First of all, keep...

@OB99 What you have now on your home network is two routers connected to one another: Main Deco (router) connected to ISP Router. This should work fine most of the time, but occasionally may cause...