As example: ip dhcp pool dpool1 import all network 192.168.1.0 255.255.255.0 default-router 192.168.1.1 domain-name domain.com option 21 ip 192.168.1.115 option 49 ip 192.168.1.115 option 31 ip 192.168.1.115 option 35 ip 192.168.1.115 dns-server 192.168.1.100 192.168.1.101 netbios-name-server 192.168.1.51