Set up every node in the app first
TP-Link instructs users to add the Deco units to the same mesh network before connecting Ethernet between them. Confirm that each satellite works wirelessly and appears in the app before changing the backhaul path.
Wire from the LAN side of the main Deco
In router mode, the modem or ONT connects to the main Deco's WAN/LAN port. A satellite should then connect to another port on the main Deco or to a switch that is downstream of the main Deco's LAN side.
A switch can distribute the wired path
A compatible switch can sit between the main Deco and multiple satellite units. Draw the physical path first and avoid connecting the same network segments in a way that creates an Ethernet loop.
Check the negotiated link at every step
The BE63 has auto-sensing 2.5Gbps WAN/LAN ports, but the path runs only as fast as its slowest switch, wall jack, cable, or adapter. A gigabit switch creates a gigabit backhaul even when both Deco ports support 2.5Gbps.
Test one wired satellite before wiring all of them
Connect one satellite, confirm its status and client performance, then add the remaining wired nodes. This makes a bad cable, wall termination, or switch port easier to identify.