DHCP

Dynamic Host Configuration Protocol

DHCP is use for to provide the dynamic IP address and other network configuration such as getway address, DNS address  to host connected in the network.

                        Package = dhcp

                        Deamon = dhcpd

                        Port number = UDP 67 for dhcp server , 68 for dhcp clients

                        Configuration file = /etc/dhcp/dhcpd.conf

Configuration

                        # /etc/dhcp/dhcpd.conf

if you did not see any content in the file then copy all configuration content from the sample file. for this

                         # cp -p /usr/lib/dhcpd/dhcpd.conf.sample /etc/dhcp/dhcpd.conf

edit /etc/dhcp/dhcpd.conf file

                         1) give here network address and subnet mask

                         2) give here server IP address NIS Domain, Domain and DNS domain name if you have.

                         3) after that give the range of IP you want to use in the network.

                         4) you can also reserve IP for future use

                         5) at last of file you can spicify the IP address for perticulre MAC address.

after that save and exit from the file and restart the DHCP service.

                          #service dhcpd restart 

On client 

 set automatically IP address under the LAN card property.

                           #dhclient ( for requesting the IP from server)