Zyxel GS2200-24 Руководство пользователя онлайн [244/332] 810932

GS2200-8/24 User’s Guide 244

CHAPTER 32

DHCP

32.1 DHCP Overview

This chapter shows you how to configure the DHCP feature.

DHCP (Dynamic Host Configuration Protocol RFC 2131 and RFC 2132) allows individual computers

to obtain TCP/IP configuration at start-up from a server. If you configure the Switch as a DHCP relay

agent, then the Switch forwards DHCP requests to DHCP server on your network. If you don’t

configure the Switch as a DHCP relay agent then you must have a DHCP server in the broadcast

domain of the client computers or else the client computers must be configured manually.

32.1.1 What You Can Do

•Use the DHCP Status screen (Section 32.2 on page 245) to display the relay mode.

•Use the DHCP Relay screen (Section 32.3 on page 246) to enable and configure global DHCP

relay.

•Use the VLAN Setting screen (Section 32.4 on page 247) to configure your DHCP settings based

on the VLAN domain of the DHCP clients.

32.1.2 What You Need to Know

Read on for concepts on DHCP that can help you configure the screens in this chapter.

DHCP Modes

If there is already a DHCP server on your network, then you can configure the Switch as a DHCP

relay agent. When the Switch receives a request from a computer on your network, it contacts the

DHCP server for the necessary IP information, and then relays the assigned information back to the

computer.

DHCP Configuration Options

The DHCP configuration on the Switch is divided into Global and VLAN screens. The screen you

should use for configuration depends on the DHCP services you want to offer the DHCP clients on

your network. Choose the configuration screen based on the following criteria:

• Global: The Switch forwards all DHCP requests to the same DHCP server.

• VLAN: The Switch is configured on a VLAN by VLAN basis. The Switch can be configured to relay

DHCP requests to different DHCP servers for clients in different VLAN.