WRT1900AC as Access point

Hi,

I have another router which I wish to keep as my main router for all wired devices.

I want to use the 1900AC as a wireless accesspoint and also anything I might connect to it wired

so that the main router I'm using will be able to allocate IPs to all thats connected to the 1900AC,

wireless or wired.

I currently have DHCP and NAT turned OFF on the 1900AC and I changed the IP to 192.168.2.1

which I am not sure if this is the correct way to do it? But I figured that since my main router has the

IP 192.168.1.1 that the 1900AC cannot have that too.

I've been able to set the PC IPV4 to 192.168.2.100 sub:255.255.255.0 and gateway 192.168.2.1 to

gain access to the 1900AC so I can get access to it fine.

The IP range that my main router uses for client allocations are 192.168.1.100 - 192.168.1.200.

But I cannot get the 1900AC to pass IPs from the main router.

What am I doing wrong?

thanks