I have a router Asus AC3200, the Omada Controller OC-200 and 4 AP's (two EAP 225 and two EAP245). One of the AP's (EAP245) located at level 2 cannot connect to the Omada Controller. The issue is that it gets an IP address outside the router's range. My router's IP address is 192.168.1.1, with a pool from 192.168.1.2 to 192.168.1.254.
Once I plug in the new AP, it connects to the internet and I can configure it manually with a Windows laptop, but its IP address is 192.168.107.1, outside the router's range. I cannot see the AP in the router clients list and the AP cannot connect to the controller. I have tried to assign a static IP to the AP, but it doesn't work. If i move it near the router an connect with a short network cable, it works fine and I can configure it without problems. I have manually assigned an IP address of 192.168.1.204 to the AP from the router (no conflicts there).
Once I move it back upstairs, it obtains the wrong IP adress again. I have tried resetting it, move it downstairs and upstairs again, I have even exchanged it and the new AP reacts the same way. There is a direct CAT5 cable from the router at the main floor to the AP at level 2. Because the AP has internet when I set it up at level 2, I assumed that there is nothing worng with the cable. I did try to check the cable with a network cable tester, but it seems that I have all green lights upstairs and no lights at all downstairs, so I am not sure if the tester has enough power to push the signal for testing (probably 30-50 feet length). But because the AP has internet, it seems to not be a cable issue.
I am considering changing the cable terminations, in case there is a physical issue or change the ASUS router, as a last resort, but this really weird and I could use some ideas on how to fix this.
Any help would be greatly appreciated.