@pdeseymour I have one of my Satellite Deco connecting through two switches. It is supported configuration, when everything is right. You can find in just four steps that I will list below what is...

@Arjandev I don't know what "double cable" means. You need regular Ethernet cables, two in total if you have two Satellite Deco. Use same cables that you use to link Satellite Deco to the switch. The...

@Arjandev Daisy chain all your Deco units from Main to the last Satellite, with Ethernet cables, like this: Do they all report Ethernet link now?

@FrannyK 16 meters from Main Deco is too far for Satellite Deco. In Deco app, check what does it tell about quality of signal. This will be in "Show List" page, something like this: Also, open...

@NAlex This is supported. It is first network diagram in Q2 of TP-Link FAQ document: General questions about Ethernet Backhaul feature on your Deco

@FrogXL I would recommend running Deco mesh in Access Point mode. In that mode, you can wire Deco units any way you want. Wire each Deco, including Main Deco, to the switch: If you have free ports on...