What is the Asus hidden network I see?

[0ID]

I see on 5GHz a Hidden Network generated by an Asus device and due a specific mark I know that is coming from one of my 3 XT9 devices. The main device is in AP mode the remaining 2 are nodes, Ethernet backhauled 2,5 WAN only - no Auto mode.

Could someone explain please what is this?

[jzchen]

If you're noting a SSID_dwb, the "_dwb" is a dedicated backhaul channel.  Enabling as "fronthaul and backhaul" should allow your devices to access it.

OR

You can go to AiMesh -> System Settings (tab) and enable Ethernet Backhaul Mode and it should get rid of this.

AiMesh is creating this _dwb channel in case an Ethernet cable is accidentally unplugged it would immediately switch to wireless backhaul so your network is uninterrupted.