@Adex1 This switch should be OK. You will not need to make any changes in Deco app. No features will be lost. If Satellite P9 is wired to and can use the switch, you'll see the following in Deco app...

@MOHAMMEDKHATEM In your case, get Deco unit from one of the following models: M4, M5 or M9 Plus. Make it Main Deco, see How to replace the main Deco with another Deco

@Adex1 If you can connect the third Deco to the second with Ethernet cable, you will not need the switch: If you can't do that, you will need the switch: Not every switch is compatible with Deco...

@Networker49 Do your run your Deco mesh in Router mode or in Access Point mode? The mode setting should be under Advanced in Deco app.

@eyeye It is possible that devices prefer WiFi6 from XE75 to WiFi5 from P7. It is also possible that what you have is just Deco app reporting issue: devices do connect to P7 but Deco app does not...

itsOmid wrote So, to confirm, the LAN ports on the Deco devices are inactive when they’re in AP mode, correct? @itsOmid This is not correct. I run Deco mesh in AP mode and I have three devices...