A configuration revision number error notification signifies that a device has incremented its vtpConfigRevNumberErrors counter. Generation of this notification is suppressed if the vtpNotificationsEnabled has the value 'false'. The device must throttle the generation of consecutive vtpConfigRevNumberError notifications so that there is at least a five-second gap between notification of this type. When notification are throttled, they are dropped, not queued for sending at a future time. (Note that 'generating' a notification means sending to all configured recipients.)