In DHCP Manager, select the Options tab.
See How to Start and Stop DHCP Manager for information about DHCP Manager.
Choose Create from the Edit menu.
The Create Options dialog box opens.
Type a short descriptive name for the new option.
The name can contain up to 128 alphanumeric characters and spaces.
Type or select values for each setting in the dialog box.
Refer to Table 15–5 for information about each setting, or view the DHCP Manager help.
Select Notify DHCP Server of Change if you are finished creating options.
This selection tells the DHCP server to reread the dhcptab table to put the change into effect immediately after you click OK.
You can now add the option to macros, and assign a value to the option to pass to clients.