EX6150v2 does not see or connect to any 5GHz network

[T-C-R]

My EX6150v2 is not able to recognize, or connect, to any 5GHz WLAN network. Scanning gives no result on 5GHz, whilst all 2.4GHz WLAN available are all listed. However, for 5GHz the list remains empty after scanning, and even if I enter the SSID manually the Extender is not able to connect. 

I tried several times configuring from scratch (factory reset), but the device is only working with 2.4GHz WLAN, not 5GHz.

Anyone having had the same issue, or even a resolution, highly appreciating a respond.

Best regards from Germany,

[plemans]

what router do you have? 

Is the EX6150 set with the EU/germany region? And is the router set with the same region? 

What channel is your router broadcasting its 5ghz on? 

[T-C-R]

I have a mesh network running on 3x Nokia "Beacon 3". It is a triband solution, with 2.4GHz and 5GHz propagating the same SSID. The solution has an intelligent channel management, selecting the channels on both bands according to the least interferences. Typically for 5GHz channel 36 or 112 is selected, with 80MHz bandwidth. The config is set to EU and also for the extender I selected Europe in the config wizzard.

There is not a single 5GHz WLAN that is scanned by the Extender, realy strange.

[plemans]

I've never used the nokia beacon so I'm not sure of how it works with 3rd party extenders. 

I would make sure to set the 5ghz channels on a non-dfs channel

[T-C-R]

will do some further

Thanks for the advice, it definitely was because of dfs channels selected by the router.

Which is unsatisfactory to say the least, as it would not allow me to stay with the interference detection capabilities of the router.

BUT: That must be a firmware issue! How do I know? Because I loaded the device with OpenWRT 19.7.7, and it worked right out of the box. So the HW is not the limitation, something in the firmware is causing it.

In case one is interested, here is the link:

https://firmware-selector.openwrt.org/?version=19.07.7&target=ipq40xx%2Fgeneric&id=netgear_ex6150v2