35 dhcp overview, Introduction to dhcp, Dhcp overview – H3C Technologies H3C WX6000 Series Access Controllers User Manual

Page 374

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35-1

35

DHCP Overview

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

z

Introduction to DHCP

z

DHCP Address Allocation

z

DHCP Message Format

z

DHCP Options

z

Protocols and Standards

The term switch in this document refers to a switch in a generic sense or an access controller
configured with the switching function unless otherwise specified.

Introduction to DHCP

The fast expansion and growing complexity of networks result in scarce IP addresses assignable to
hosts. Meanwhile, with the wide application of wireless networks, the frequent movement of laptops
across networks requires that the IP addresses be changed accordingly. Therefore, related
configurations on hosts become more complex. Dynamic Host Configuration Protocol (DHCP) was
introduced to solve these problems.

DHCP is built on a client-server model, in which the client sends a configuration request and then the
server returns a reply to send configuration parameters such as an IP address to the client.

A typical DHCP application, as shown in

Figure 35-1

, includes a DHCP server and multiple clients (PCs

and laptops).

Figure 35-1

A typical DHCP application

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