CBC1952 wrote @David-TP Thanks for your reply. I downloaded the firmware, ethernet connected a PC to a satellite X20 unit, and went through the process to upgrade the firmware. That just hung...

@AnnoyedUser69 There is no simple diagnostic tool I can recommend. Your switch reports link connection and speed for each port, by LED lights on switch ports. This should be enough to tell if link is...

@AnnoyedUser69 Judging from your other post and network diagram and problem description, you might have issues with wired part of your home network that could make DHCP service on Pi inaccessible to...

@AnnoyedUser69 Deco mesh in AP mode will turn on its DHCP service when "primary" DHCP server on the network becomes unavailable. As long as there is functioning DHCP server on your network Deco mesh...

@AnnoyedUser69 It appears wired link between your switch and Main Deco is broken. Network layout will be the following and it explains what you see: Node 2 can't connect by Ethernet to Main Deco, so...

@Pete12121 Check this document for suggestions how to properly wire Deco mesh units: General questions about Ethernet Backhaul feature on your Deco