ES4626-SFP Management Guide.pdf

3)After receiving the DHCP request message, the DHCP server will allocate IP address
and other information for the client according to the information and preconfigured policy
in the option segment of the message. Then it will forward the reply message with DHCP
configuration information and option 82 information to DHCP Relay Agent.
4)DHCP Relay Agent will peel the option 82 information from the replay message sent by
DHCP server, and then forward the message with DHCP configuration information to the
DHCP client.
12.2 DHCP option 82 Configuration
12.2.1 DHCP option 82 Configuration Task List
1. Enabling the DHCP option 82 of the Relay Agent.
2. Configure the DHCP option 82 attributes of the interface.
3. Enable the DHCP option 82 of server.
4. Diagnose and maintain DHCP option 82.
1. Enabling the DHCP option 82 of the Relay Agent.
Command
Explanation
Global configuration mode
Set this command to enable the option
ip dhcp relay information option 82 function of the switch Relay Agent.
no ip dhcp relay information option The “no ip dhcp relay information option”
is used to disable the option 82 function
of the switch Relay Agent.
2. Configure the DHCP option 82 attributes of the interface
Command
Explanation
Interface configuration mode
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