Yes, this means that your satellite Deco units are connecting to courtyard via PLC+Wifi, PLC take priority over Wifi backhaul as it's generally faster and has less latency. Everything is working as it should here.

@Alexmesh thanks for explaining. I think I've misinterpreted the Deco map screen. It seems that PLC/wifi are being used to access the main Deco.

Of course, I can't see if PLC _or_ wifi is being used and I'm sure I cannot tell the main Deco just to use PLC or wifi?

Your ethernet set-up is good since you know that ethernet is being used to main Deco. I assume the "main" Deco is the Loft in your case?

@Alexandre. Thanks for telling me. Am I right in thinking that I can't tell if PLC or wifi is being used in this case, as both logos are shown? I also assume I cannot tell the main Deco just to use/accept PLC (and disable wifi) for example? However, if there was a disable wifi on main Deco that would mean that a cllent near to it would not be able to connect to it I assume, so a double-edged sword?

I have my Deco main connected in to a power strip, and it still seems to work, which is good thing from these Decos (my old PLCs didn't do that).

The only way I know of forcing the Deco units to use PLC, wifi or Ethernet backhaul with the others shut off is with a custom firmware from TP link but generally they are used for troubleshooting and I doubt they will make one if it's all working as they deem it should. I had problems when mixing ethernet and plc+wifi would make the mesh crash during the evenings and require manually resetting, a network loop apparently. In my experience if only wifi backhaul is being used the PLC symbol will disappear and you'll be left with just a wifi signal symbol between them.

@Alexmesh I'll give that a miss. Thanks again!

  @thelinkuser 

thelinkuser wrote

I have my Deco main connected in to a power strip, and it still seems to work, which is good thing from these Decos (my old PLCs didn't do that

The PX50 uses a newer technology compared to other powerline gear, it uses the G.hn standard which is a lot better than the older homeplug AV standards which were notorious for disconnecting or not connecting at all. It uses the earth ground wire for data too which is a big help in reliability. In an ideal world we'd have ethernet in every room including ceiling drops but I think so far the PX50 is a good compromise, I can listen to youtube videos without buffering whilst working out in the yard now which I couldn't before buying the PX50 kit.