I suddenly have problems adopting my 3 APs throuch the controller Web UI.

My APs are all

EAP670 1.0

Firmware: 1.1.1 Build 20250326 Rel. 61737(4555)

• I have a management network on vlan 100
• I have configured the port on the switch that wires directly to the AP with "All" profile.
• There no ACLs at all configured
• All Networks are interfaces with a specified vlan number
• I resetted all APs (web UI shows wizard)
  • So currently no dedicated management vlan is set on the AP standalone config
• All devices can be reached by ping (also intermediate switches)
• My topology is
  • Router
    • Controller
    • Switch MAIN
      • Switch AP
        • AP 1
        • AP 2
        • AP 3

When I am in the user vlan (different than management) with my workstation I can ping the APs, but I cannot reach the UI of the APs. When I am in the Management network with my workstation I can ping and reach the web ui.

The APs pop up in the list of devices as PENDING, but when I try to adopt the adoption fails because "the AP dis not react to adoption commands".

If I go through the wizard and set the controller ip in the APs settings, I first get an adoption error because of the uasername/password (expected), if then enter them in the window in the controller ui, i get the same error as above.

This setup worked for > 2 years. suddenly connection to the APs where broken, I tried to forget them and re-provision and now i am in this situation.

What can I do to solve this? How can I debug?

I restarted every device in the network, all firmwares are up to date.