@yonz Let me start with saying that your case is unusual. Deco mesh prefers star topology. People complain on that forum that Satellites connect to Main Deco even when WiFi backhaul between them is...

@yonz It is possible your Deco B is too far from Main Deco to establish good link to it. Either that, or some sort of WiFi interference happens occasionally, such as microwave gets turned on or...

@KV_wifi My answers to your questions: 1. Adding X90 as Main Deco should not have changed how you can manage your Deco mesh. I wonder if you started to use VPN with your cellular service, or...

@Zoobz Three nodes is not too many. The problem must be somewhere else. When you run Deco mesh in its default Router mode, you can't wire both Deco Node 1 and Deco Node 2 to Asus RTAC87U router. This...

@Vishnuandu This should work. Also, see: General questions about Ethernet Backhaul feature on your Deco

@Cdoney77 This is how you can keep settings: 1. Add S7 as Satellite Deco to your existent Deco mesh. 2. Promote S7 to Main Deco: Changing the Main Unit for your Mesh Network 3. Delete (Remove) all...