T3700G-28TQ
 
JetStream 28-Port Gigabit Stackable L3 Managed Switch CLI Guide 
 
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Command Mode 
Global Configuration Mode 
Example 
Enable option 82 support in DHCP Relay: 
T3700G-28TQ(config)# ip dhcp relay information 
ip dhcp relay information policy 
Description 
The ip dhcp relay information policy command is used to specify the policy 
when receiving DHCP request packets with Option 82 field. To resume the 
default policy, please use no ip dhcp relay information policy command. 
Syntax 
ip dhcp relay information policy [ drop | keep | replace ] 
no ip dhcp relay information policy 
Parameter 
drop | keep | replace —— Specify the policy. The default policy is keep. 
drop: Discard the packet with the Option 82 field. 
keep: Keep the Option 82 field in the packet. 
replace: Replace the option 82 field with the system option defined by the 
switch. 
Command Mode 
Global Configuration Mode 
Example 
Specify the option 82 policy as replace to replace the Option 82 field with the 
local parameter on receiving the DHCP request packet: 
T3700G-28TQ(config)# ip dhcp relay information policy replace 
ip dhcp relay information custom 
Description 
The ip dhcp relay information custom command is used to enable the Option 
82 customization function. To disable this function, please use no ip dhcp relay 
information custom command. 
Syntax 
ip dhcp relay information custom