ubquiti

I have an Edgerouter X (running 1.10.5), 2 APS, and a Unifi Switch 24. My questions are these. 1) How do I go about assigning my DHCP range of all devices on my network to 192.168.99.100 - 192.168.99.254 ? Is this done on the router or my switch? 2) How do I go about changing my...