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DES-7200 Configuration Guide Chapter 5 DHCP Relay Configuration
5-4
5.1.4 Understanding
DHCP relay Check
Server-id Function
When the DHCP is used, generally multiple DHCP servers are configured for a
network for the purpose of backup, so that the network will continue to work
even if a server fails. During the four interaction processes of DHCP acquisition,
a DHCP server has been selected when the DHCP client sends the DHCP
request message. Here, the DHCP request message includes the optional
server-id. In some particular application circumstances, we need to enable this
option for relay in order to reduce loads on the network server. In this way, the
DHCP request message is only sent to the specified DHCP server, instead of to
every configured DHCP server. This is the DHCP check server-id function.
5.2 Configuring DHCP
5.2.1 Configuring the
DHCP Relay Agent
To configure the DHCP relay agent, execute the following commands in the
global configurtion mode:
Command Function
DES-7200 (config)# service dhcp
Enable the DHCP agent.
DES-7200(config)# no service dhcp
Disable the DHCP agent.
5.2.2 Configuring the IP
Address of the DHCP
Server
After you have configured the IP address of the DHCP Server, the DHCP
request message received by the device will be forwarded to it. At the same