Dhcp Overview - 3Com 4500 PWR 26-Port Configuration Manual

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DHCP Overview

Wh n configuring DHCP, go to these e
Introduction to DHCP
DHCP IP Address Assignment
DHCP Packet Format
Protocol Specification
Intro duction 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 a
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 to solve these issues.
DHCP adopts a client/server model, where the DHCP clients send request
configuration parameters; and the DHCP servers return the corresponding configuration information
such as IP addresses to im
A typical DHCP application includes o
as shown in Figure 38-1
Figure 38-1 Typical DHCP application
DHCP IP Address Assign
IP Ad dress Assignment Policy
Cur ently, DHCP provides the following three IP address assignment policies to meet the requirements r
of d ifferent clients:
Manual assignment. The administrator configures static IP-to-MAC bindings for some special
clients, such as a WWW server. Then the DHCP server assigns these fixed IP addresses to the
clients.
sections for information you are interested in:
plement dynamic allocation of network resources.
ne DHCP server and multiple clients (such as PCs and laptops),
.
ment
38-1
nd the
s to DHCP servers for