DHCP (Dynamic Host Control Protocol)  Server Configuration

Step 1 : Install dhcp packages using yum server
[root#] yum  install  dhcp*

Step 2 : Verify the dhcp packages
[root#] rpmquery  -qa  |  grep dhcp
o/p :
dhcp.i686 12:4.1.1-12.P1.el6

Step 3 : Copy the sample file of dhcp to dhcp configuration file
[root#] cp  /usr/share/doc/dhcp-4.1.1/dhcpd.conf.sample     /etc/dhcp/dhcpd.conf

Step 4 : Get the IP Address of your machine
[root#] ifconfig
192.168.2.2

Step 5 :  Using the GUI open the file  /etc/dhcp/dhcpd.conf

** Make the following changes 

1. Go to Line No 27  and change :

subnet 192.168.2.0 netmask 255.255.255.0 
** Changed subnet as first 3 digits of IP and last digit as 0 and netmask as 255.255.255.0 

2. Go to Line No 32  and change :

subnet 192.168.2.0 netmask 255.255.255.0 
** Changed subnet as first 3 digits of IP and last digit as 0 and netmask as 255.255.255.0 

3. Go to Line No 33 and change :
range   192.168.2.2    192.168.2.255;
** first IP will be yours
** second IP will be first 3 digits of your IP and last digit as 255

4. Go to Line No 34 and change : 
option routers 192.168.2.1;

** any IP less than your IP 

**  SAVE THE FILE

Step 6 :  Start the dhcp service
[root#] service  dhcpd  start

Step 7 : Restart the dhcp service
[root#] service  dhcpd  restart


Testing DHCP Client

Step 1 :  Open the file  /etc/sysconfig/network-scripts/ifcfg-eth0

Change the Line 
Bootproto = dhcp

** Save the file

Step 2 :  Restart the network
[root#] service  network  restart