Dhcp Relay Agent Configuration; Introduction To Dhcp Relay Agent; Application Environment; Fundamentals - HP A7500 Series Configuration Manual

DHCP relay agent configuration

NOTE:
The DHCP relay agent configuration is supported only on Layer 3 Ethernet ports (or subinterfaces), VLAN
interfaces, and Layer 3 aggregate interfaces.

Introduction to DHCP relay agent

Application environment

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.
NOTE:
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 the

Fundamentals

Figure 29 shows a typical application of the DHCP relay agent.
Figure 29 DHCP relay agent application
DHCP client
DHCP client
The DHCP server and client interact with each other in the same way with or without a relay agent (see
the chapter "DHCP overview").
DHCP client
DHCP relay agent
DHCP client
MPLS Configuration Guide
IP network
DHCP server
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