This document discusses DHCP (Dynamic Host Configuration Protocol). It defines DHCP as a method for automating the assignment of IP addresses and networking information. The purposes of DHCP are to reduce workload and errors from manually assigning IP addresses. It describes how DHCP works by clients sending discovery messages and servers responding with offers, and how leases are renewed. Proper planning is needed when setting up a DHCP server to implement an IP addressing strategy and allow for network growth.

1. DHCP
(DYNAMIC HOST CONFIGURATION
PROTOCOL)
By
Lalit Bhati
HCL cdc Gr.Noida
lkumar008@gmail.com

2. OUTLINE
 What is DHCP
 Purpose of DHCP
 Configuration of DHCP
 How DHCP works on a network
 Lease Renewal in DHCP
 Planning for DHCP

3. WHAT IS DHCP
 Dynamic Host Control Protocol (DHCP) is a
method for automating the assignment of IP
addresses and other networking information.
It is used on campus in residence halls and
libraries, as well as over the wireless network.
 Inother words DHCP Automatically
assigns IP addresses and tcp/ip setting to
devices on a network

4. PURPOSE OF DHCP
 The overall purpose of the DHCP server is to
reduce the workload and error margins, which
can occur in assigning the IP addresses
manually.
 When a computer uses a static IP address there
can be the chances of error and conflict when two
computers use the same IP address. By using the
DHCP server there are no chances of such kind of
conflicts and errors.

5. CONFIGURATION OF DHCP
 Installing the DHCP server is made quite easy in
Windows 2003. By using the "Manage your
server" wizard, you are able to enter the details
you require and have the wizard set the basics
for you. Open to "Manage your server" wizard,
select the DHCP server option for the list of
server roles and press Next.
You will be asked to enter the name and
description of your scope.
 Scope: A scope is a collection of IP addresses for
computers on a subnet that use DHCP.

6. HOW DHCP WORKS ON A
NETWORK
Discover
Offer
Request
Acknowledgement
1. Client sends Discover “Someone
send me an address”. This is a
Server
broadcast. Client
2. Servers Offer “Use this
address”.
3. Client Requests “I’ll use this
one”. (broadcast)
4. Servers Acknowledge “OK or No
Way!” (ACK/NAK)

7. LEASE RENEWAL IN DHCP
 Halfway through lease period, client asks its
current server to continue using the address.
 Client sends Request (uncast).
 Server sends Acknowledgement.
 If current server isn’t available, client will
broadcast request. This may cause it to change
servers.
 If lease expires, client must stop using the
address and start the process from scratch

8. PLANNING FOR DHCP
 Preparation for DHCP requires careful planning
 IP addressing strategy
 Consider current needs
 Allow for growth
 Network architect configures rules for addressing
strategy into DHCP server

9. THANK
YOU