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Appendix D: Bulk Configuration or Firmware Upgrade via DHCP/TFTP
768
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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 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.
Important: The magic cookie is transmitted to and stored in PX3TS 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 PX3TS. Therefore, you must modify
the magic cookie's value in DHCP when intending to execute the
"fwupdate.cfg" commands next time.
IPv6 illustration example in dhcpd6.conf:
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