H3C S7500 Series Ethernet Switches Operation Manual

Operation Manual – DHCP

H3C S7500 Series Ethernet Switches Chapter 1

DHCP Overview

1-1

Chapter 1 DHCP Overview

When configuring DHCP, go to these sections for information you are interested in:

z Introduction to DHCP

z DHCP IP Address Assignment

z DHCP Packet Format

z DHCP Packet Processing Modes

z Protocols and Standards

1.1 Introduction to DHCP

With networks getting larger in size and more complicated in structure, lack of

available IP addresses becomes the common situation the network administrators

have to face, and network configuration becomes a tough task for the network

administrators. With the emerging of wireless networks and the using of laptops, the

position change of hosts and frequent change of IP addresses also require new

technology. Dynamic host configuration protocol (DHCP) is developed in this

background.

DHCP adopts a client/server model, where DHCP clients send requests to DHCP

servers for configuration parameters; and the DHCP servers return the corresponding

configuration information such as IP addresses to configure IP addresses

dynamically.

A typical DHCP application includes one DHCP server and multiple clients (such as

PCs and laptops), as shown in

Figure 1-1.

DHCP client DHCP clie

DHCP client DHC

P client

DHCP server

Figure 1-1 Typical DHCP application