I'm setting up a wireless intranet network using Airport Extreme DHCP service for over 300 machines. I set the static IP of my Airport Extreme as 10.1.10.1 and subnet mask as 255.255.252.0. Then enable Route Mode as DHCP Only. I found that DHCP range had been limited to 10.1.10.x for both "from" and "to" field. I'm not able to change it to 10.1.11.x. Why did this happen? Is there anything wrong with my setting?