Use Cisco router as a DHCP server

The purpose of this short tutorial is to show you how to enable your Cisco router to be a DHCP server for the local LAN.

Router configuration

The first thing to do is to give your router an IP on the local lan interface -:

interface FastEthernet0
 ip address 192.168.0.1 255.255.255.0

Now you need to define the DHCP range for the clients, along with gateway and DNS server information -:

ip dhcp excluded-address 192.168.0.1
!
ip dhcp pool internal
 network 192.168.0.0 255.255.255.0
 default-router 192.168.0.1
 dns-server 208.67.220.220 

And that is all there is to it, your internal clients should start picking up addresses via DHCP now.