Cisco IOS DHCP Cheat Sheet by stephaneb

Device­(co­nfig)# service dhcp

Enables the DHCP server and relay agent on your switch.

Device­(co­nfig)# ip dhcp pool 1

Creates a name for the DHCP server address pool and enters DHCP pool config­uration mode.

Device­(dh­cp-­con­fig)# dns server 8.8.4.4 8.8.8.8

Specifies the IP address of a DNS server that is available to a DHCP client.

Device­­> show ip dhcp binding [address]

Displays a list of all bindings created on a specific DHCP server.

Device­­> show ip dhcp server statistics

Displays count inform­ation about server statistics and messages sent and received.

Device­# clear ip dhcp binding address | *

Deletes an automatic address binding from the DHCP database. Specifying address clears the automatic binding for a specific (client) IP address whereas specifying asterisk (*) clears all automatic bindings.

Device­# clear ip dhcp server statistics

Resets all DHCP server counters to 0.

Device­# debug ip dhcp server {events | packets}

Enables debugging on the DHCP server.