This object enables starting/stopping of traffic generation as well as resetting of monitored streams. This object may not be specified at configuration creation time - in this case it will take the value of `none'. This allows manager to explicitly control the start and stop of traffic generation/monitoring activity. Value of `stop' is invalid if the activity is specified but not started. Value of `start' is valid during creation time, as well as when activity is already stopped. Specification of `reset' resets the specified streams to default values, as well as clears the control specification. Get on this variable gives the most recent SNMP set specification.