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This chapter shows you how to configure the DHCP feature.
39.1 DHCP Overview
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.
39.1.1 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.
39.1.2 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.
39.2 DHCP Configuration
Click IP Application > DHCP in the navigation panel to display the screen as shown. Click the link next to
DHCPv4 to open screens where you can enable and configure DHCPv4 relay settings and create option
82 profiles. Click the link next to DHCPv6 to open a screen where you can configure DHCPv6 relay
settings.
MES3500-24S/MGS3520 Series User's Guide
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DHCP
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