ZyXEL Communications GS2200-24P Series, User Manual, Page: 265 / 360

GS2200-24/24P User’s Guide
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DHCP
30.1 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. You
can configure the Switch as a DHCP server or a DHCP relay agent. When
configured as a server, the Switch provides the TCP/IP configuration for the
clients. If you configure the Switch as a relay agent, then the Switch forwards
DHCP requests to DHCP server on your network. If you don’t configure the Switch
as a DHCP server or 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.
30.1.1 What You Can Do
• Use the DHCP Status screen ( Section 30.2 on page 267 ) to display the relay
mode.
• Use the DHCP Relay screen ( Section 30.3 on page 268 ) to enable and
configure global DHCP relay.
• Use the VLAN Setting screen ( Section 30.4 on page 269 ) to configure your
DHCP settings based on the VLAN domain of the DHCP clients.
30.1.2 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.