Understanding Dhcp Features - Cisco IE 3000 Software Configuration Manual

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Configuring DHCP Features

This chapter describes how to configure DHCP snooping and the option-82 data insertion features on the

IE 3000 switch.

For complete syntax and usage information for the commands used in this chapter, see the command

reference for this release, and see the "DHCP Commands" section in the Cisco IOS IP Command

Reference, Volume 1 of 3: Addressing and Services, Release 12.2 from the Cisco.com page under

Documentation > Cisco IOS Software > 12.2 Mainline > Command References.

This chapter consists of these sections:

Understanding DHCP Features

DHCP is widely used in LAN environments to dynamically assign host IP addresses from a centralized

server, which significantly reduces the overhead of administration of IP addresses. DHCP also helps

conserve the limited IP address space because IP addresses no longer need to be permanently assigned

to hosts; only those hosts that are connected to the network consume IP addresses.

These sections contain this information:

For information about the DHCP client, see the "Configuring DHCP" section of the "IP Addressing and

Services" section of the Cisco IOS IP Configuration Guide, Release 12.2 from the Cisco.com page under

Documentation > Cisco IOS Software > 12.2 Mainline > Configuration Guides.

Understanding DHCP Features, page 20-1

Configuring DHCP Features, page 20-6

Displaying DHCP Snooping Information, page 20-12

DHCP Server, page 20-2

DHCP Relay Agent, page 20-2

DHCP Snooping, page 20-2

Option-82 Data Insertion, page 20-3

DHCP Snooping Binding Database, page 20-5

C H A P T E R

Cisco IE 3000 Switch Software Configuration Guide

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