@nkw1985 I would suggest switching Deco WAN link back to gigabit port. Not in this Deco model, but 2.5 GBps port caused some issues. Especially, if your modem has gigabit port, you would not want to...

@nkw1985 That looks very much like Main Deco negotiating 100Mbps over Ethernet link to the ONT modem. When you reboot Main Deco, it'll briefly renegotiate gigabit speed but can't keep it due to...

@NetStream 1. Where is ISP router/modem on that floor plan? 2. Do you plan to have Satellite Deco(s) connected with Ethernet cables to Main Deco, or using WiFi? 3. What is firmware version of Deco...

Shafiul_1112 wrote @Alexandre. No! @Shafiul_1112 Main Deco plays the role of standard WiFi router. Its second Ethernet port is LAN port. By connecting PC/laptop to Main Deco with Ethernet cable, you...

@SeoulGal Firmware that runs on your Deco M9 Plus is more than 3 years old. Since then, TP-Link made a lot of improvements in firmware, based on feedback from people like you. By updating to latest...

@RBZ5416 RBZ5416 wrote @Alexandre. What can I say? The statement I quoted is from a TP-Link employee & the thread that @Wrayman linked to has 193 posts over five years requesting manual selection. So...