@Sorin7559 

Even though a hard wired setup is generally better, as a trouble shoot I'd try setting the satellites up wirelessly.

At the beginning they were wirelessly connected, but the signal loss was simply too big. While main Deco was delivering +/- 600Mbs constantly, the satellites were only getting to 150Mb in the best case. Wired..they are equally fast. When it works, this system is unbelievable. But "when it works" started to worry me....I really need a stable and reliable connection

@Sorin7559 

Just Main Deco goes bad, right?

I wonder if you have defective X60 unit, which happened to be Main Deco. To test that, promote different Deco to Main Deco and swap it with Main Deco. See if new Main Deco experiences same issue or if issue followed original Main Deco unit. 

Also, are you the only one who has access to Deco app on smartphone? If someone deletes Deco unit from Deco mesh, in Deco app, "Deco is ready for setup" is what you could get.

Finally, @BBH has the point: does not matter how impossible it sounds, but what happens could be result of incompatibility between Deco units and your switch or Ethernet wiring. To test that, you'll have to run Satellite X60s connected wirelessly to Main Deco for a while.

Thank you for the extended answer.

I will try to punctually answer and detail:

- not only the main deco has this issue, but 2 out of 3. When this happens, the main deco and one of the APs are blinking blue, while the other AP has a solid red light. Last time (which was yesterday) I could not reconnect anymore the AP blinking blue, so I have now only a main deco and one AP

- I have seen in the past a lot of systems with switched/APs, from HP or Cisco to Peplink and TP link. I have done all combination imaginable and never ever had any compatibility issues

And finally, connected wirelessly is not an option for me. I have a home office on the second floor in the house and I really need good speed and reliable internet there. And while I have 600Mb constantly at the entrance point (ground floor), I can hardly get to 120Mb-150Mb on the second floor wirelessly. And in the same time connection is instable with a very big latency. So, unfortunately wired is the way to go.

If I can't figure it out, I'm afraid that I will have to return the Deco system and install my old routers/APs back...

@Sorin7559 

Makes sense to return Deco X60s and try different WiFi mesh. You either have defective set, or some sort of incompatibility between Deco and your wired home network.

Hi, Thank you for the questions, will try to answer one by one:

1. No, I did not remove any Deco from the app. The problem happened 3 times already and affecting 2 out of 3 Decos, so the likelihood of this being the cause is extremely low :-)

2. Message sent

3. No power outage for sure. Some of the IoT devices I have are connected directly to the ISP modem and they were online continuously (main Deco and the modem are connected to the same power socket).

I am not really keen on returning the system - when it works it is just wonderful! But I want to eliminate the "when it works" from the equation, I need a reliable Internet connection. That is why I would be curious to test another system.