ip dhcp excluded-address 192.168.12.1 192.168.12.10

ip dhcp pool DHCP
 network 192.168.12.0 255.255.255.0
 default-router 192.168.12.1 
 dns-server 8.8.8.8 
 domain-name cisco.local

interface Ethernet0/0
 ip address 192.168.12.1 255.255.255.0