DHCP Simple Configuration

DHCP Protocol

-Dynamic Host Configuration Protocol or DHCP is based on client/server architecture.

-DHCP works on port 67 server side and 68 client side

-Its fundamental function is assigning IP addresses to clients and users in the same network automatically referring to pre-configured parameters in the server side itself.

-DHCP can be configured on a dedicated DHCP Server or it can be implemented virtually on a virtualised environment, on a router, firewall or even a switch, this choice will be made referring to the architecture that an enterprise is based on.

DHCP configurations on a Cisco router:

Under the privileged mode:

#service DHCP   

!--Enables the DHCP service on a router--!

#ip dhcp pool POOL1 

#network 10.0.0.0 255.255.255.0

!-- The router in this step will assign IP addresses in the network 10.0.0.1 to 10.0.0.254--!

#default-router 10.0.0.254

#lease 10

!--The gateway each machine will get automatically is 10.0.0.254 and each address will be reserved on the client for 10 days--!

#show IP DHCP binding

!-- This command displays each association between the distributed IP address and the machine that obtained it --!