Dear @ITV ，

ITV wrote

Devices can not connect to the ceiling-AP-version. The error message is about a non-matching WPA-key.

While the same key works as expected when connecting to one of the 2 outdoor AP's.

The message in the eventlog says:

[Failed]E0-D4-E8-35-FE-BC failed to connected to 60-32-B1-12-9A-BA with SSID "Wtrading" on channel 1 because WPA Authentication times out/failed.(1 time in a minute)

 The only working config for the SSID Wtrading is:

- disabling the 5-Ghz-band *and*

- disable fast/AI-roaming.

If I leave one of these on, the same error returns.

Two questions:

(1) - How can I determine the MAC-address for the wifi-parts of the AP?

(2) - Any suggestions to have this working on the 5-Ghz-band?

Thanks for your feedback, here is some information as your reference.

1. The MAC address of the EAP shown on the controller is the 2.4GHz MAC address, if you add the number at the end of this MAC address + 1 it will be the 5GHz MAC address.

For example, if the EAP's MAC address is 1A-1B-1C-1D-1E-2A, then this is the 2.4G MAC address, but 5G MAC address should be 1A-1B-1C-1D-1E-2B.

2. TP-LINK support locally tried to test as you described, but it did not reproduce the problem, so could you please test again to see if the problem is reproduced consistently?

Best Regards!

It is/was reproduced consistently - spend 2+ hours on all kind of testing. Perhaps there is more then meets the eye?

Dear @ITV ,

ITV wrote

It is/was reproduced consistently - spend 2+ hours on all kind of testing. Perhaps there is more then meets the eye?

The issue you are experiencing sounds unusual, I'd like to escalate your case to the TP-Link support team for further investigation.

They will reach you via your registered email address shortly, please pay attention to your email box later.

Once the issue is addressed or resolved, I'd encourage you to share it with the community.

Thank you so much for your cooperation and patience!