mac

Commands for DHCP Option 82
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28.13 ip dhcp server relay information enable
Command: ip dhcp server relay information enable
no ip dhcp server relay information enable
Function: This command is used to enable the switch DHCP server to identify option82.
The “no ip dhcp server relay information enable” command will make the server ignore
the option 82.
Parameters: None
Command Mode: Global configuration mode
Default Setting: The system disable the option82 identifying function by default.
User Guide: If the users want the switch DHCP server to identify option82 and return
option 82 information in the reply message, this command needs to be set, or, the switch
DHCP server will ignore the option82.
Example: Set the DHCP server to support option82
Switch(Config-if-Vlan1)# ip dhcp server relay information enable
28.14 show ip dhcp relay information option
Command: show ip dhcp relay information option
Function: This command will display the state information of the DHCP option 82 in the
system, including option82 enabling switch, the interface retransmitting policy, the circuit
ID mode and the switch DHCP server option82 enabling switch.
Parameters: None.
Command Mode: Admin and Global Configuration Mode.
User Guide: Use this command to check the state information of Relay Agent option82
during operation.
Example:
Switch#show ip dhcp relay information option
ip dhcp server relay information option(i.e. option 82) is disabled
ip dhcp relay information option(i.e. option 82) is enabled
Vlan2:
ip dhcp relay information policy keep
ip dhcp relay information option subscriber-id standard
Vlan3:
ip dhcp relay information policy replace
ip dhcp relay information option subscriber-id foobar