@Hawk521 Do you use "main router" as synonym for "main Deco, and "access point" as synonym for "satellite Deco"? When you state "wall penetration is at a minimum", do you mean that the wireless...

@Hawk521 Does the app not show, for each satellite, "what actual bands are used by the backhaul"?

@JowivK The BSSID of a wifi access point is a unique identity of that access point. If an access point broadcasts several SSID, it will do that with a single BSSID. That could help investigate which...

@JowivK I was not aware that the Deco would not accept being configured with an SSID because it detects that the SSID is already broadcasted by something else. What was the exact error message? I...

@JowivK You are right, you can keep the wifi of the Archer, just keep it seperate (other SSID) than the wifi of the Deco.

@JowivK I understand you have a single ISP box, "TP-Link Router with integrated modem that has been provided by my ISP", hence I called it an "ISP modem". Indeed, the main Deco will be connected to...