@Wales It means Main Deco, for whatever reason, can't negotiate gigabit link over Ethernet cable to the fiber box and downgrades that link to 100Mbps speed. That is why your download/upload speed...

@Wales Do you see "Abnormal WAN port speed" message when you open Deco app:

@PapaSchlumpf It is possible to use Deco LAN ports in AP mode. Which is what I do. You may wish to try powering off/on your home devices in the following order, to see if it fixes the problem. Make...

@NitroGeorge You did ask for simple to implement solution. Access Point mode is the simplest. Here is another option: 1. Turn off MikroTik WiFi. You have Deco mesh, it will provide WiFi coverage; 2....

@NitroGeorge Configure Deco mesh to run in Access Point mode, and instead of two networks you'll have one (combined). Then, you can connect printer to either router, or Deco - both diagrams can do....

@PoloNet Operating Mode is global setting that applies to all units in Deco mesh.