@FelixBeijing When I first tried to add an ethernet switch to my Deco S4s it crashed the system by which I mean all three Decos had a continuous red light and I had to reset them however.... This...

@William_Kohut This solution worked for me: 1. Set up Deco S4 + add other S4s to create network 2. Disconnect all Decos except main one by removing power cable 3. Add Ethernet Switch 4. Add each...

Thanks for your reply @TP-Link My Decos are S4 not M4 The model number is S4R (EU) When I attach the ethernet switch to the main Deco, and then connect some devices via the ethernet ports, all three...

@Kevin_ZI are you able to help me? Or anyone else I have three Deco S4s which I have only just bought I want to add an ethernet switch to the Main Deco S4 but it crashes the set up every time I try I...

I have the exact same issue I want to add an ethernet switch to the Main Deco s4 but it crashes the set up every time I try In addition to William_Kohut's set up I have also tried... Modem>Ethernet...