Configuring Dhcp Relay Agent; Overview; Fundamentals - HP 3600 v2 Series Configuration Manual

Configuring DHCP relay agent

The DHCP relay agent configuration is supported only on Layer 3 Ethernet interfaces, Layer 3 aggregate
interfaces, and VLAN interfaces.

Overview

Via a relay agent, DHCP clients can communicate with a DHCP server on another subnet to obtain
configuration parameters. DHCP clients on different subnets can contact the same DHCP server rather
than having a DHCP server on each subnet. This centralizes management and reduces cost reduction.
An MCE device serving as the DHCP relay agent can forward DHCP packets not only between a DHCP
server and clients on a public network, but also between a DHCP server and clients on a private network.
Note that the IP address ranges of the public and private networks or those of private networks cannot
overlap each other. For more information about MCE, see Layer 3—IP Routing Configuration Guide.

Fundamentals

Figure 32 DHCP relay agent application
The DHCP server and client interact with each other in the same way with or without a relay agent (see
"DHCP overview").
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