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What does DHCPEXPIRE mean?

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Found this in the Logfile


2024-06-03 15:45:59+02:00 xyz dhcpd[14438]: DHCPEXPIRE on IP to MAC

While DHCPACK/OFFER/REQUEST are part of the protocol, I cannot find any reference for DHCPEXPIRE.


Does anyone know what this actually means? Is this just the server recording, that the lease has ended without renewal or is it something the client sent? Thanks for any input or pointer.


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