Why my wifi client cannot get IP when the SSID is in NAT mode?

Zyxel_Melen

SSID NAT mode provides a large DHCP pool size (10.0.0.0/8 or 172.16.0.0/12). If your wifi client cannot get an IP address, please check if you have enabled load balancing in AP & port settings.

'Enable "By client device number" mode with "Disassociate client device when overloaded" ', or 'Enable "Smart Classroom" mode', the access point will ignore association request and authentication request packets from any new client device when the maximum number of client devices is reached.

You may increase the "Maximum client device number" or disable load balancing to resolve this problem.

Reference: How to use NAT mode on AP?