Explain how to configure DHCP Server.

• DHCP (Dynamic Host Configuration Protocol) helps to assign IP addresses to clients in a distributed manner. It is centrally configured server who specifies a range of IPs to be allotted to connected clients on request. It cannot assign IP to any Ethernet aliases if exists.
• Following are the steps to configure DHCP Server
• Verify the software package is installed on your system as follow:
$ ps ax | grep dhcp
• If not already installed, then install on your system as follow:
$ sudo apt-get install isc-dhcp-server
• There are two main files that are probably need to change /etc/dhcp/dhcpd.conf and /etc/default/isc-dhcp-server to specify the interfaces dhcp should listen to.
• Open the configuration file of dhcp in editor, i.e. /etc/dhcp/dhcpd.conf
And perform the following:
1. Edit the line 'option domain-name' and write your domain name:
option domain-name "example.com"
2. Edit the line 'option domain-name-servers' and write the name of your name server as shown below, for eg the name is tyit.example.com
option domain-name-servers tyit.example.com;
3. Edit the line subnet to provide your subnet and netmask inormation as shown below:
subnet 192.168.1.0 netmask 255.255.255.0
4. Specify the range in which IPs are to be assigned to DHCP clients on request as shown below:
range 192.168.1.150 192.168.1.200;
• Restart the service of dhcp, as shown below
$ sudo service isc-dhcp-server restart
• Enable dhcp on boot, as shown below
$ chkconfig dhcpd on
• As the server is configured, verify the setup on the client system.