@TP-Link 

Hi,

Please find answer below your questions:

1.Did all the Deco units would randomly turn red?

Not sure... I think it's only this specific one but I will update next time it's happened.

2.Can I Have a picture of the network topology of your Deco system?

3.How often did this issue happen and what did you do to recover the connection, rebooting the Deco or it could come back automatically later?

It can happen once a week or 2 times in one day.

I don't need to do anything, the connection restored automatically after 1-2 minutes.

4.May I know who is your internet service provider and if there is a cable modem involved?--if yes, can I have the model as well?

Partner LTD is the ISP provider and I am getting a fiber to the house that connects directly to the Main Deco M5.

I am almost sure that last time it happened I checked the main Deco and it was GREEN (working) with connection + I think all other apple TV worked as well... But I will make sure again next time it will happen.

@TP-Link 

It is only on this one and not all

please see event viewer from PC from today.

PLEASE ASSIST it is unbearable 

@TP-Link @deco 

I noticed that signal source sudently disconected from wire and change to WIFI before it is happaned. 

I checked all wires with LAN tester and the wires are OK.

@TP-Link I know that the office WiFi signal is weak this is why I use a LAN connection. The problem is that occasionally the LAN is disconnected and this is what cause the disconnections.

How can I log why the LAN disconnected?

@TP-Link I have mixed with other Deco as well and had the same problem (both with the same firm v 1.5.3 build 20210203 rel. 68223)

@TP-Link what is loop detection or prevention and how do I turn it off?