Opening up an local network with DHCP whith own IP-segment

I initially thought, that this is a very basic task, but somehow I faced some Issues.

I have an TP-Link Access Point that is connected with a static IP in an existing network at adress 192.168.225.185. (Mask: 255.255.255.0, GW: 192.168.225.1).

I now want the AP to open up an own network, that does not extend the existing network (192.168.225.x) over the air, but creates an own network, that is separated with an own IP-range. (e.g. 192.168.0.x).

At the TP-Link GUI, I cannot set an own network range. It is just possible to Apply DHCP within the 225.x-Network. If I want to change, it says, that the DHCP-Range has to be within the APs network.

So: How would I create an own, local WLAN with a personally set adress range.

My AP is: TP-LINK TL-WA901ND. Thanks in advance.

Solution 1:

If you need separate network - you need a router, but WA901ND is an access point. Access points are only bridging Ethernet and Wi-fi. There is no way WLAN and LAN ports of access point have addresses in different networks.