What does revoking a license key mean?

Revoking license keys is the process of removing the current license key for the network function from the license repository.

Note: When the CLM revokes a license key, it only removes the license key file from the FTP server or network function local storage.  It does not remove the reference to the license key from the BOF of the network function.  This is done to ensure the network function remains functional for as long as the previous license was valid for, or until the network function is rebooted.