@TP-Link 

Hey!

Yes, I'm always able to reproduce it by unplugging the auxiliary deco M4 (which my computer is connected to). Then it all starts to work again. My ISP router is Huawei HS8546V. Just to clear this out - this router is connected to every deco via ethernet. They are not directly connected in any sense. M4 work in access_point mode. I've put my main deco into DMZ on the Huawei router but still has the same issue. I also noticed that I needed wifi connection for the first setup - seems like they were having problems with discovering themselves via LAN. But they all got the ip address.

Thank you for looking at this case! Yes, topology is correct

>Once you manually unplug MAC from Auxiliary Deco M4, all Deco M4(the main +2 Auxiliary Decos) started to blink red.

Yes - auxiliaries are down

>It would not auto recover automatically until the MAC Is plugged back?

Yes

>Would restarting the main Deco get the connection back?

 Nope - auxiliary has to be restarted

> May I know the model number and operating system of your MacBook?

Macbook Pro M1

>Later I would like to forward your case to the senior engineers for further assistance.

Thank you!

@TP-Link Hello!

Were you able to move this case forward? I still have the issue. Looks like Deco is loosing internet connection once I unplug my mac. Then I can only fix that by reconnecting mac with deco (mac needs to have wifi, otherwise it looks like Deco can't find itself in the network. Only connecting computer (via ethernet hub) + wifi + resetting the auxiliary deco can help. Sometimes resetting the main deco can also help. That's super weird...

@TP-Link 

“Resetting” here, I guess you mean restarting the Deco: power off/on?

So it would be like: plug the MAC back, then restart RE Deco1 or main Deco?

Yes, I unplug and plug the auxiliary (since i cannot connect to it) or I do a software reboot of main Deco (which still is connected to the internet and can be accessed)