TP-Link T1600G-18TS Configuration Manual page 443

Configuring DHCP DHCP Relay Configuration
The following example shows how to set the routed port 1/0/2 as the default relay agent
interface and configure the DHCP server address as 192.168.1.8 on VLAN 10:
Switch#configure
Switch(config)#interface gigabitEthernet 1/0/2
Switch(config-if)# ip dhcp relay default-interface
Switch(config-if)#exit
Switch(config)#ip dhcp relay vlan 10 helper-address 192.168.1.8
Switch(config)#show ip dhcp relay
......
DHCP VLAN relay helper address is configured on the following vlan:
vlan Helper address
---------- --------------
VLAN 10 192.168.1.8
Switch(config)#end
Switch#copy running-config startup-config
Configuration Guide 420