Suppose you have a network 192.168.0.0/24, with the router at 192.168.0.1, and you want the DHCP server to hand out dynamic addresses from 192.168.0.50 to 192.1

Suppose you have a network 192.168.0.0/24, with the router at 192.168.0.1, and you want the DHCP server to hand out dynamic addresses from 192.168.0.50 to 192.168.0.240 to clients, and hand out static IPs from 192.168.0.2 to 192.168.0.49 to specific identified devices via static leases. Those static IPs are outside the configured IP range for the DHCP server, intentionally.