Before you can apply an IPv4 network template to a DHCP
reserved addresses, you must add the DHCP Template UDF to the DHCP reserved
address.
Note: If you are assigning a new DHCP reserved address, the Apply
template UDF is automatically applied upon creation.
Adding and updating DHCP reserved addresses to include the DHCP Template UDF:
Once you have added or updated a DHCP reserved address,
the Apply Template link appears on the Details page of the
DHCP reserved address.