@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...

@Aserin Deco M9 firmware does not come with scheduled reboot feature yet, and you must have it on all Deco units in the Deco mesh to be able to configure it. If you would like, you could install M9...

@Skeeve_Stevens Yes, DHCP IP address reservation on router is the only way. In Access Point mode your Deco units are just regular networking devices as far as Archer router concerned, no different...