Since the X60 router only has one ethernet port out (and i need at least 3), can I use an ethernet splitter? If it works, are there any reasons why not to use a splitter?

Deco x60, 1.1.3 Build 20200110 Rel. 63639, app shows system is up to date. Hello, I'm having trouble setting up the Deco x60 Ethernet Backhaul. Everything works fine on wifi, the remote units connect

Do the satellites communicate with each other or only with the router?

Does the Deco X60 have wireless backhaul or is it only via ethernet?