User`s manual

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After selecting to enable DHCP Server function, type in the Network IP address
for the DHCP server IP pool, Subnet Mask, Default Gateway address and Lease
Time for client.
Once you have finished the configuration, click Apply to apply your configuration
Excluded Address:
You can type a specific address into the IP Address field for the DHCP server
reserved IP address.
The IP address that is listed in the Excluded Address List Table will not be
assigned to the network device. Add or remove an IP address from the Excluded
Address List by clicking Add or Remove.
Manual Binding: the switch provides a MAC address and IP address binding and
removing function. You can type in the specified IP and MAC address, then click
Add to add a new MAC&IP address binding rule for a specified link partner, like
PLC or any device without DHCP client function. To remove from the binding list,
just select the rule to remove and click Remove.
Option 82 IP Address Configuration: the DHCP server with option 82 function
presented in latest firmware. This feature support fully DHCP relay function, and
allows user to configured relay circuit ID, Remote ID to compliant fully DHCP