I have 9x Deco P9 here and sadly already the first (Master) does not find the Internet.
So what works:
I can set it up by app, set the networkname, dynamic IP, password, connect and over.
Deco Led turns red.
I can connect to the wifi of the Deco P9 but it never hast internet connection (stays red)
Router restart and Deco restart...no changes
Already tested multiple devices of my 3 packages.
All show the same behaviour.
The Routers of my configuration:
1x Telekom Speedport Smart - typical basic ISP branded Router (could be Huawei) for 50Mbit DSL
second testing Platform.
AVM Fritzbox 6591 Cable
No succes on both platforms.