DHCP only on wrt router

Hello,

Quick overview, i have a router on 192.168.0.0/24 that serves my wifi, i have openwrt on another router on 192.168.1.0/24 that is running VPN. Im trying to accomplish anything that is plugged into the router(192.168.1.0/24) or connected over wifi to serve DHCP. if something is connected to my modem lan or other router(192.168.0.0/24) for that to serve dhcp for that device.

Openwrt is handing out address across the whole LAN on both subnets. is there a way to isolate dhcp only on that single device?

Probably you need to use static leases and/or individual options.

This should be the default behavior, if you plug the main network into the WAN port of the secondary router. Perhaps you configured the secondary router as a dumb AP?