@David-TP 

I updated the firmware of the main deco to the beta you sent me. After installing I see the next lines in the log. There is no attachment icon in the toolbar, so I don't see to be able to attach the complete log.

I see these errors:

Wed Jul 30 13:13:32 2025 daemon.err nrd[9866]: estimatorDot11kIterateCB: Timeout waiting for 802.11k response from 7E:1F:EC:B1:A0:3C

Wed Jul 30 13:13:35 2025 daemon.err nrd[9866]: estimatorCmnHandleBeaconReportEvent: Invalid beacon report for CE:33:CF:0A:66:6C

Wed Jul 30 13:13:38 2025 daemon.err nrd[9866]: triggerMonSteering: Failed to get uplink rssi for 7E:1F:EC:B1:A0:3C

7E:1F:EC:B1:A0:3C is my iPhone, CE:33:CF:0A:66:6C is my iPad.

Can you see something from the logs that helps you with troubleshooting?

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To add to the information above.

On all our iPhones and iPads I have set the setting Private wifi-address to Fixed. Still I see a message in the Deco app that tells me that a random mac-adress is detected on all the connected iPhones and iPads.

Don't know if that information can help? Does the Deco track the type of wifi-address (Mac address) correctly? Also for iOS 18? I am just guessing now...

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In the mean time I installed the beta on all my decos past wednesday. The network has been stable since, until 15 minutes ago. So I nearly believed that the beta had fixed the issue. But alas, no cigar! And after rebooting the main deco, it immediately goes back to red. Because the up time is so short I am not able to fetch an error log.

What can we do now to troubleshoot further?

  @David-TP 

Before I reconfigure the whole network to router mode (I did that before, and got the same outages) I want to add the log file, which magically I have been able to fetch this morning from the web interface. Hopefully you can analyze it, and get information about the moments that the network drops out. Adding the log directly does not work, so I zipped it.

The topology at the moment is this (hopefully the formatting will remain.:

- ONT - Router (WiFi off) -> main Deco M9 Plus (AP-mode)

->TL-SG1024D---other Deco units (AP-mode)

So the main Deco, and the switch are plugged in directly into the router.

I do this to preserve the rest of the network once the main Deco fails.

Other devices, plugged into the switch are a Home Assistant Green, a Philips Hue bridge, a desktop PC, a Heat Pump CiC, and an Apple TV.

  @David-TP 

3 weeks ago I sent you a message with a log. All this time we have no WiFi connections at home.

I run devices through Ethernet all the time, so my router is definively working.

The biggest issue that I have with "ONT - Router (WiFi off)---main Deco M9 Plus---TL-SG1024D---other Deco units" is that when the main Deco faults, I don't have any network at all, anywhere at home. The Ethernet out is not a bypass (which I find a little weird).

That's why I have:

ONT - Router (WiFi off)---main Deco M9 Plus (AP)

ONT - Router (WiFi off)---TL-SG1024D---other Deco units

Did you get anything from my log file?

Are you still positive that the issue can be solved? I am no so sure anymore after more than 1/2 year of struggling.

EDIT: By the way: before I started writing this message, I rebooted the main Deco. After I sent it to you, the led was already red again. This is NOT funny anymore. It's an expensive system, and it's far too early to throw it away and invest another 200-300.

Please advise.