I have issues recently with my M9 Plus deco system. The firmware and app is all updated with latest version. When I connect to my office VPN (Cisco Anyconnect), many sites within my company intranet...

@SMRTech That combination should work. Start by configuring main Deco (either direct to ISP or via switch) first, then add the secondary Decos whic is connected to the switch. Then run the setup...

@TpNewb Try deleting all the Decos and re initiate the setup with 2 decos, one (main) and second connected via Ethernet and then set up the system via app. After first 2 are successful, connect 3rd...

@David-TP I have reached out to tech support via website. Thanks.

@Jannek999 I am testing option II ie without a switch just connect first deco to ISP and second Deco via ethernet from first one (no switch involved), same issue. The switches are fine as they work...

@David-TP In both options all 3 Decos go Red. I am using FIOS ethernet (no cable modem or coax), Ethernet coming to house from FIOS NIC. 100Mb connection not Gigabyte etc.