LEGRAND Raritan PX3TS User Manual page 784

Appendix D: Bulk Configuration or Firmware Upgrade via DHCP/TFTP
764
d. Select "00002 pdu-update-control-file" from the Available Options list,
and type the filename "fwupdate.cfg" in the "String value" field.
e. Select "00003 pdu-update-magic" from the Available Options list, and
type any string in the "String value" field. This third option/code is the
magic cookie to prevent the fwupdate.cfg commands from being
executed repeatedly. It does NOT matter whether the IPv6 magic
cookie is identical to or different from the IPv4 magic cookie.
The magic cookie is a string comprising numerical and/or alphabetical
digits in any format. In the following illustration diagram, it is a
combination of a date and a serial number.