|just use the default vlan, which is vlan 1., then on the SVI on vlan 1 , configure a ip helper address, if your using a remote DHCP server, like a windows or linux one, no ip address helper is needed if you configure a dhcp service on the router, |
interface vlan 1
ip address 10.1.1.1 255.255.255.0
ip address helper 10.1.1.30
NOTE: make sure you can ping the DHCP from the cisco switch, or this will not work.
#ping 10.1.1.30 [enter]
now 10.1.1.30 is your dhcp server, this is required for dhcp services to work, now you have to learn howto configure the dhcp server, which is another topic.