Raritan PX3-1000 series, User Manual

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Appendix D: Bulk Configuration or Firmware Upgrade via DHCP/TFTP
583
Configure the same option in DHCP accordingly. The PX3 accepts the
configuration or firmware upgrade only when this value in DHCP
matches.
3. Set the following three sub-options in the
"vendor-encapsulated-options" (option 43).

code 1 (pdu-tftp-server) = the TFTP server's IPv4 address

code 2 (pdu-update-control-file) = the name of the control file
"fwupdate.cfg"

code 3 (pdu-update-magic) = any string
This third option/code is the magic cookie to prevent the
fwupdate.cfg commands from being executed repeatedly. It does
NOT matter whether the IPv4 magic cookie is identical to or
different from the IPv6 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.
Important: The magic cookie is transmitted to and stored in PX3 at
the time of executing the "fwupdate.cfg" commands. The
DHCP/TFTP operation is triggered only when there is a mismatch
between the magic cookie in DHCP and the one stored in PX3.
Therefore, you must modify the magic cookie's value in DHCP when
intending to execute the "fwupdate.cfg" commands next time.