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ES4626-SFP Management Guide.pdf

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ip dhcp server relay information<br />

enable<br />

no ip dhcp server relay information<br />

enable<br />

This command is used to enable the<br />

switch DHCP server to identify option82.<br />

The “no ip dhcp server relay information<br />

enable” command will make the server<br />

ignore the option 82.<br />

4. Diagnose and maintain DHCP option 82<br />

Command<br />

Explanation<br />

Admin mode<br />

This command will display the state<br />

information of the DHCP option 82 in the<br />

system, including option82 enabling<br />

show ip dhcp relay information option<br />

switch, the interface retransmitting<br />

policy, the circuit ID mode and the DHCP<br />

server option82 enabling switch.<br />

This command is used to display the<br />

information of data packets processing in<br />

debug ip dhcp relay packet<br />

DHCP Relay Agent, including the “add”<br />

and “peel” action of option 82.<br />

12.2.2 Command for DHCP option 82<br />

12.2.2.1 ip dhcp relay information option<br />

Command:ip dhcp relay information option<br />

no ip dhcp relay information option<br />

Function:Set this command to enable the option82 function of the switch Relay Agent.<br />

The “no ip dhcp relay information option” command is used to disable the option82<br />

function of the switch Relay Agent<br />

Parameters:None.<br />

Default Settings:The system disables the option82 function by default.<br />

Command Mode:Global configuration mode.<br />

Usage <strong>Guide</strong>:Only the DHCP Relay Agents configuring with this command can add<br />

option82 to the DHCP request message, and let the server to process it. Before enabling<br />

this function, users should make sure that the DHCP service is enabled and the Relay<br />

Agent will transmit the udp broadcast messages whose destination port is 67.<br />

Example:Enable the option82 function of the Relay Agent.<br />

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