Router-Name(config)# ip dhcp excluded-address low-address [high-address]
For resources like Servers and Printers where we want to statically assign an address that will not change we will exclude those addresses using this command
Use the 2 addresses to specify a range
Router-Name(config)# ip dhcp excluded-address 10.10.10.250 10.10.10.254
10.10.10.250
10.10.10.251
10.10.10.254