@Jayachandar_02 HD=High-Density more than 1000 clients in the specifications. I have an EAP660 HD too it also has 511 clients in the controller

@Jayachandar_02 it looks like there are limitations in the controller software, I see there are more on the HD device EAP625-Outdoor HD EAP610-Outdoor

@Jayachandar_02 Have you set anything on the Maximum Associated Clients settings on the access point?

@Cepheus0815

@Cepheus0815 set default as native and untagged rest of the vlan us tagged. apply to all switch port. as i showed in the example

@Cepheus0815 Switch port config