In addition to standard DHCP options, DHCP Server supports the customization of non-standard parameters that the DHCP Server provides to clients in response to DHCP requests. The following conditions apply:
You must assign a DHCP code in the unassigned range from 224 to 254.
You must first define the option. After the option is defined, you can assign a data value to the option globally or for a specific subnet or vendor class. For more information about the different scopes and their precedence in application, see DHCP Server.
In the Custom Option definition, you must assign one of three data types: IPv4 address, string, or integer. After you define a data type, all data values for that option, irrespective of which scope they are assigned in, must use that data type.
Custom Options do not support the assignment of arrays or the override of standard DHCP options.