Administrator Guide

DHCP Server and Relay Settings 1089

DHCP Server and Relay Settings

Dell Networking N2000, N3000, and N4000 Series Switches

This chapter describes how to configure the switch to dynamically assign

network information to hosts by using the Dynamic Host Configuration

Protocol (DHCP).

The topics covered in this chapter include:

• DHCP Overview

• Default DHCP Server Values

• Configuring the DHCP Server (Web)

• Configuring the DHCP Server (CLI)

• DHCP Server Configuration Examples

DHCP Overview

DHCP is generally used between clients and servers for the purpose of

assigning IP addresses, gateways, and other network settings such as DNS and

SNTP server information.

DHCP Snooping is a security feature that monitors DHCP messages between

a DHCP client and DHCP server. It filters harmful DHCP messages and

builds a bindings database of (MAC address, IP address, VLAN ID, port)

tuples that are specified as authorized. DHCP snooping can be enabled

globally and on specific VLANs. For information about DHCP Snooping, see

"Snooping and Inspecting Traffic " on page 943.

Dell Networking N-Series switches support a DHCP client for obtaining the

switch address from the network, an IPv4 DHCP server for serving IPv4

addresses to DHCP clients in the network, layer-2 and layer-3 DHCP relay for

relaying IPv4 address assignments from network-based DHCP servers to

clients in the same or different subnets, and DHCP snooping for protecting

the switch and DHCP clients from certain security risks.