Class CIM_REDDropperService
extends CIM_DropperService

REDDropperService represents the ability to drop network traffic using a Random Early Detection (RED) algorithm. The purpose of a RED algorithm is to avoid congestion (as opposed to managing congestion). Instead of waiting for the queues to fill up, and then dropping large numbers of packets, RED works by monitoring average queue depth. When the queue depth exceeds a minimum threshold, packets are randomly discarded. These discards cause TCP to slow its transmission rate for those connections that experienced the packet discards. Other connections are not affected by these discards. A RED dropper always drops packets from a single queue, which is related to the dropper as the following Service in the NextService association. The queue(s) examined by the drop algorithm are found by following the CalculationServiceForDropper association(s) to determine the dropper's DropThresholdCalculationService(s), and then following the CalculationBasedOnQueue association to find the queue being watched by each CalculationService.

Table of Contents
Hierarchy
Direct Known Subclasses
Class Qualifiers
Class Properties
Class Methods

Name	Data Type	Value
Description	string	REDDropperService represents the ability to drop network traffic using a Random Early Detection (RED) algorithm. The purpose of a RED algorithm is to avoid congestion (as opposed to managing congestion). Instead of waiting for the queues to fill up, and then dropping large numbers of packets, RED works by monitoring average queue depth. When the queue depth exceeds a minimum threshold, packets are randomly discarded. These discards cause TCP to slow its transmission rate for those connections that experienced the packet discards. Other connections are not affected by these discards. A RED dropper always drops packets from a single queue, which is related to the dropper as the following Service in the NextService association. The queue(s) examined by the drop algorithm are found by following the CalculationServiceForDropper association(s) to determine the dropper's DropThresholdCalculationService(s), and then following the CalculationBasedOnQueue association to find the queue being watched by each CalculationService.
UMLPackagePath	string	CIM::Network::QoS
Version	string	2.7.0

Class Properties

Local Class Properties

Name	Data Type	Default Value	Qualifiers
Name	Data Type	Default Value	Name	Data Type	Value
MaxQueueThreshold	uint32
			Description	string	This is an unsigned 32-bit integer that defines the maximum average queue length at which packets are subject to always being dropped, regardless of the dropping algorithm and probabilities being used. (See the ThresholdUnits property to determine the units of the threshold.)
			MaxValue	sint64	1000
			MinValue	sint64	0
			ModelCorrespondence	string	CIM_REDDropperService.ThresholdUnits
MinQueueThreshold	uint32
			Description	string	This is an unsigned 32-bit integer that defines the minimum average queue depth at which packets are subject to being dropped. (See the ThresholdUnits property to determine the units of the threshold.) The slope of the drop probability function is described by the Start/StopProbability properties.
			ModelCorrespondence	string	CIM_REDDropperService.ThresholdUnits
StartProbability	uint32
			Description	string	This is an unsigned 32-bit integer, used in conjunction with the StopDropProbability property. The start and stop probabilities define the slope of the drop probability function. This function governs the rate at which packets are subject to being dropped, as a function of the queue length. This property expresses a drop probability in drops per thousand packets. For example, the value 100 indicates a drop probability of 100 per 1000 packets, that is, 10%. Min and max values are 0 to 1000.
			ModelCorrespondence	string	CIM_REDDropperService.StopProbability
			Units	string	Per Thousand Packets
StopProbability	uint32
			Description	string	This is an unsigned 32-bit integer, used in conjunction with the StartDropProbability property. The start and stop probabilities define the slope of the drop probability function. This function governs the rate at which packets are subject to being dropped, as a function of the queue length. This property expresses a drop probability in drops per thousand packets. For example, the value 100 indicates a drop probability of 100 per 1000 packets, that is, 10%. Min and max values are 0 to 1000.
			MaxValue	sint64	1000
			MinValue	sint64	0
			ModelCorrespondence	string	CIM_REDDropperService.StartProbability
			Units	string	Per Thousand Packets
ThresholdUnits	uint16
			Description	string	ThresholdUnits is an enumerated integer that identifies the units for the Min and MaxQueueThreshold properties. The values are either bytes (1) or packets (2).
			ValueMap	string	1, 2
			Values	string	Bytes, Packets

Inherited Properties

Name	Data Type	Class Origin
AlwaysDrop	uint16	CIM_DropperService
Caption	string	CIM_ManagedElement
CommunicationStatus	uint16	CIM_ManagedSystemElement
CreationClassName	string	CIM_Service
Description	string	CIM_ManagedElement
DetailedStatus	uint16	CIM_ManagedSystemElement
DropFrom	uint16	CIM_DropperService
DropMaintainMetric	uint16	CIM_DropperService
DropperType	uint16	CIM_DropperService
DropStartMetric	uint16	CIM_DropperService
ElementName	string	CIM_ManagedElement
Enabled	boolean	CIM_ConditioningService
EnabledDefault	uint16	CIM_EnabledLogicalElement
EnabledState	uint16	CIM_EnabledLogicalElement
HealthState	uint16	CIM_ManagedSystemElement
InstallDate	datetime	CIM_ManagedSystemElement
InstanceID	string	CIM_ManagedElement
Name	string	CIM_Service
OperatingStatus	uint16	CIM_ManagedSystemElement
OtherDropperType	string	CIM_DropperService
OtherEnabledState	string	CIM_EnabledLogicalElement
PrimaryOwnerContact	string	CIM_Service
PrimaryOwnerName	string	CIM_Service
PrimaryStatus	uint16	CIM_ManagedSystemElement
RequestedState	uint16	CIM_EnabledLogicalElement
Started	boolean	CIM_Service
StartMode	string	CIM_Service
Status	string	CIM_ManagedSystemElement
SystemCreationClassName	string	CIM_Service
SystemName	string	CIM_Service
TimeOfLastStateChange	datetime	CIM_EnabledLogicalElement
TransitioningToState	uint16	CIM_EnabledLogicalElement
AvailableRequestedStates	uint16[]	CIM_EnabledLogicalElement
OperationalStatus	uint16[]	CIM_ManagedSystemElement
StatusDescriptions	string[]	CIM_ManagedSystemElement

Class Methods

Inherited Class Methods

Name	Return Type	Class Origin
RequestStateChange	uint32	CIM_EnabledLogicalElement
StartService	uint32	CIM_Service
StopService	uint32	CIM_Service

Class CIM_REDDropperServiceextends CIM_DropperService

Table of Contents Hierarchy Direct Known Subclasses Class Qualifiers Class Properties Class Methods

Class Hierarchy

Direct Known Subclasses