Dhcp Relay Agent Configuration; Introduction To Dhcp Relay Agent; Application Environment; Fundamentals - HP V1910 Switch Series User Manual

DHCP relay agent configuration

Introduction to DHCP relay agent

Application environment

Since DHCP clients request IP addresses via broadcast messages, the DHCP server and clients must be
on the same subnet. Therefore, a DHCP server must be available on each subnet, which is not practical.
DHCP relay agent solves the problem. Via a relay agent, DHCP clients communicate with a DHCP server
on another subnet to obtain configuration parameters. Thus, DHCP clients on different subnets can
contact the same DHCP server, and centralized management and cost reduction are achieved.

Fundamentals

Figure 238 shows a typical application of the DHCP relay agent.
Figure 238 DHCP relay agent application
DHCP client
DHCP client
No matter whether a relay agent exists or not, the DHCP server and client interact with each other in a
similar way (see the chapter
DHCP relay agent.
DHCP client
DHCP relay agent
DHCP client
"DHCP overview"). The following describes the forwarding process on the
IP network
DHCP server
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