@DeclanMC When Satellite Deco M5 loses Ethernet backhaul, even briefly, it will switch to WiFi backhaul. During the switch Satellite Deco will not have connection to Deco mesh. Satellite Deco will...

@richpig It is my understanding that Deco P9 does not support Connection Preference feature. By TP-Link design, all Deco units in Deco mesh must support Connection Preference feature for it to work....

@Carl999 You can't do that with Deco mesh, but there is a solution. Look for dual-WAN router. It does not need to be WiFi capable. Place it in front of Deco mesh, connecting router to both internet...

@GyanAccessFreak I would suggest adding Satellite Deco wirelessly first. Bring Satellite Deco to where Main Deco is, add Satellite to Deco mesh if it does not join automatically. Give Satellite Deco...

@RobW1 Sorry to hear this did not work for you. You will need to undo the change, by switching Deco mesh to run in default Router mode. If you can't get access to Deco mesh through Deco app, you may...

@RobW1 Double NAT usually means your home network has another router in front of Main Deco. If this is the case, switch Deco mesh to Access Point mode and double NAT issue will go away: Switching a...