In DHCP Manager, select the Macros tab.
See How to Start and Stop DHCP Manager for information about DHCP Manager.
Choose Create from the Edit menu.
The Create Macro dialog box opens.
Type a unique name for the macro.
The name can be up to 128 alphanumeric characters. If you use a name that matches a vendor class identifier, network address, or client ID, the macro is processed automatically for appropriate clients. If you use a different name, the macro is not processed automatically. The macro must be assigned to a specific IP address or included in another macro that is processed automatically. See Macro Processing by the DHCP Server for more detailed information.
Click the Select button, which is next to the Option Name field.
The Select Option dialog box displays an alphabetized list of names of standard category options and their descriptions. If you want to add an option that is not in the standard category, use the Category list. Select the category that you want from the Category list. See About DHCP Options for more information about option categories.
Select the option to add to the macro, and click OK.
The Macro Properties dialog box displays the selected option in the Option Name field.
Type the value for the option in the Option Value field, and click Add.
The option is added to the bottom of the list of options in this macro. To change the option's position in the macro, select the option and click the arrow buttons to move the option up or down in the list.
Select Notify DHCP Server of Change when you are finished adding options.
This selection tells the DHCP server to reread the dhcptab table to put the change into effect immediately after you click OK.