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DHCP server, and then forward the message with DHCP configuration information to the
DHCP client.
29.3 DHCP option 82 Configuration
Task List
Enabling the DHCP option 82 of the Relay Agent
Configure the DHCP option 82 attributes of the interface
Enable the DHCP option 82 of server
Configure DHCP option 82 default format of Relay Agent
Configure delimiter
Configure creation method of option82
Diagnose and maintain DHCP option 82
1. Enabling the DHCP option 82 of the Relay Agent.
ip dhcp relay information option
no ip dhcp relay information option
Set this command to enable the option 82
function of the switch Relay Agent. 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
Interface configuration mode
ip dhcp relay information policy {drop |
keep | replace}
no ip dhcp relay information policy
This command is used to set the
retransmitting policy of the system for the
received DHCP request message which
contains option 82. The drop mode means
that if the message has option82, then the
system will drop it without processing; keep
mode means that the system will keep the
original option 82 segment in the message,
and forward it to the server to process;
replace mode means that the system will
replace the option 82 segment in the existing
message with its own option 82, and forward
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