@David-TP All tests performed really indicate a hardware problem or incompatibility with router mode. The only remaining alternative is to try to use the Deco M5 as an access point. However, I have a...

@David-TP Hi. Firstly, following your teaching, I let the changes on the DNS only on WAN, removing all the DHCP server config (LAN). As I thought things might be solved, at about 00h30, and because I...

@David-TP Hi. Until now, no problems: connection solid and no errors. I'll surely follow your advice and find a better solution to place the device. If any problem occur in a week, I'll post here;...

@Er1 @David-TP Ok. Firmware upgraded and the cable was fixed (therefore, I have a gigabit connection again). Let me tell you something more: all the 3 DECOs are fixed (installed) on the ceiling on a...

@Er1 I tested to access the Main DECO and 2nd and 3rd DECOs via their IP adress: it was possible before and after the disconnection; the difference is that Main DECO gives more info and access than...

And there it is: the first disconnection after last reinstallation just happened. Here is the log before the reboot of all DECOs: https://fastupload.io/6qdVvbZ6MhEKAtK/file