A read-create setting specifying the security action to take once the number of learned MAC addresses reaches prvtMacSecLrnProfMaxMacCount. This determines how the switch responds to a MAC security violation, such as blocking further new MACs, shutting down the port, or another vendor-defined enforcement action, letting an admin tune the response to the severity of unauthorized device attachment. An admin might configure this to shut down the port automatically if an unexpected number of devices try to attach.