@beve I tested that with my M5. M5 connected through powerline adapter reports Ethernet connection and runs just fine. Note the following: 1) Internet speed of devices connected to that M5 will be...

@Aidan1234 If you have your Deco mesh connected to ISP Router (not to ISP modem, but to router), switch Deco Operating Mode to Access Point and these problems should go away. This is where you can do...

@Glenvdm In my house, the longest Ethernet cable that connects one of my Deco to switch is about 20m. It is Cat 5e and works just fine, but it is good quality cable. Cat 5e as long as 80m is still...

@PaulArbour On Main Deco, one port is WAN and another is LAN, Deco will automatically figure which is which. On Satellite Deco, both ports are LAN and there is no difference between them. Check this...

@Hebla Guest network is not the feature of mesh system. Many modern standalone WiFi routers offer Guest network. It is used exactly how you think it would: for guests to connect to. They can have...

@Sorin7559 Makes sense to return Deco X60s and try different WiFi mesh. You either have defective set, or some sort of incompatibility between Deco and your wired home network.