You might need to modify macros when some aspect of your network changes and one or more DHCP clients need to know about the change. For example, you might add a router or an NIS server, create a new subnet, or change the lease policy.
Before you modify a macro, determine the name of the DHCP option you want to change, add, or delete. The standard DHCP options are listed in the DHCP Manager help and in the dhcp_inittab(4) man page.
You can use the dhtadm -M -m command or DHCP Manager to modify macros. See the dhtadm(1M) man page for more information about dhtadm.
The following figure shows DHCP Manager's Macro Properties dialog box.