TP-Link T1600G-18TS Configuration Manual page 442

Configuring DHCP
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Step 8
Enter Layer 3 interface configuration mode:
interface vlan vid
Enter VLAN interface configuration mode.
: Specify the ID of the VLAN that will be configured as the default relay agent interface.
vid
The valid values are from 1 to 4094.
interface loopback lid
Enter loopback configuration mode.
: Specify the ID of the loopback interface that will be configured as the default relay agent
lid
interface. The valid values are from 1 to 64.
interface { fastEthernet port | gigabitEthernet port }
no switchport
Enter Routed Port interface configuration mode.
Specify the ID of the routed port that will be configured as the default relay agent
port:
interface.
interface port-channel lagid
Enter Port-channel configuration mode.
Specify the ID of the LAG that will be configured as the default relay agent interface.
lagid:
ip dhcp relay default-interface
Set the interface as the default relay agent interface. If the VLAN that the clients belong to
does not have an IP address, the switch will use the IP address of this interface to fill in the
relay agent IP address field of DHCP packets from the DHCP clients.
exit
Return to global configuration mode.
ip dhcp relay vlan vid helper-address ip-address
Specify the VLAN ID and the DHCP server.
Enter the ID of the VLAN, in which the hosts can dynamically get the IP addresses from
vid:
the DHCP server.
Enter the IP address of the DHCP server.
ip-address:
show ip dhcp relay
Verify the configuration of DHCP Relay.
end
Return to Privileged EXEC Mode.
copy running-config startup-config
Save the settings in the configuration file.
DHCP Relay Configuration
Configuration Guide 419