D-Link DGS-3000 Reference Manual page 240

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
DGS-3000-26TC:admin#show dhcp_relay option_61
Command: show dhcp_relay option_61
Default Relay Rule:Drop
Matching Rules:
Client-ID
-----------
00-11-22-33-44-55
Total Entries : 1
DGS-3000-26TC:admin#
20-21 config dhcp_relay ports
Description
This command is used to configure the DHCP relay of the ports.
Format
config dhcp_relay ports [<portlist> | all] state [enable | disable]
Parameters
<portlist> - Enter a list of ports to be configured.
all - Specify all ports to be configured.
state - Specify the DHCP relay state of the ports.
enable - Enables the DHCP relay.
disable - Disables the DHCP relay.
Restrictions
Only Administrators, Operators and Power-Users can issue this command.
Example
To enable the DCHP relay on port 1-3:
DGS-3000-26TC:admin#config dhcp_relay ports 1-3 state enable
Command: config dhcp_relay ports 1-3 state enable
Success.
DGS-3000-26TC:admin#
Type Relay Rule
---- ---------
MAC Address Drop
236