# Class CIM_DropperService
extends CIM_ConditioningService

DropperService represents the ability to selectively drop network traffic, and/or to invoke another ConditioningService (indicated using the NextService association) for further processing of traffic that is not dropped. It is the base class for different types of droppers. Droppers are distinguished by the algorithm that they use to drop traffic. The NextService association has special semantics for droppers, in addition to conveying the general information of 'what happens next' (that apply to all Conditioning Services). The queue(s) from which a particular dropper drops packets are identified by following chain(s) of NextService associations 'rightwards' from the dropper, until they reach a queue.

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

## Class Hierarchy

CIM_ManagedElement
|
+--CIM_ManagedSystemElement
|
+--CIM_LogicalElement
|
+--CIM_EnabledLogicalElement
|
+--CIM_Service
|
+--CIM_ConditioningService
|
+--CIM_DropperService

## Direct Known Subclasses

CIM_HeadTailDropper
CIM_REDDropperService
CIM_WeightedREDDropperService

## Class Qualifiers

Name | Data Type | Value
--- | --- | ---

Description

string

DropperService represents the ability to selectively drop network traffic, and/or to invoke another ConditioningService (indicated using the NextService association) for further processing of traffic that is not dropped. It is the base class for different types of droppers. Droppers are distinguished by the algorithm that they use to drop traffic. The NextService association has special semantics for droppers, in addition to conveying the general information of 'what happens next' (that apply to all Conditioning Services). The queue(s) from which a particular dropper drops packets are identified by following chain(s) of NextService associations 'rightwards' from the dropper, until they reach a queue.

UMLPackagePath | string | CIM::Network::QoS
Version | string | 2.7.0

## Class Properties

### Local Class Properties

Name | Data Type | Default Value | Qualifiers
--- | --- | --- | ---
Name | Data Type | Value
AlwaysDrop | uint16 |
Deprecated | string | CIM_DropperService.DropperType
Description | string | This property indicates whether the Dropper will always drop incoming packets (value=1) regardless of their type. It is deprecated since its information is conveyed by the DropperType property (value=4, 'Absolute Dropper').
ValueMap | string | 0, 1, 2
Values | string | Unknown, Always Drop, Do Not Always Drop
DropFrom | uint16 |
Description | string | This enumeration indicates the point in the associated queue (associated via the NextService relationship) from which packets should be dropped. If the value is 0 "Unknown", then packets MAY be dropped from any location in the queue.
ValueMap | string | 0, 1, 2
Values | string | Unknown, Head, Tail
DropMaintainMetric | uint16 |
Description | string | This property is an enumerated unsigned 16-bit integer that defines the metric used to determine when ALL packets will be dropped REGARDLESS of the type of algorithm used by this Dropper. Values are: 1: Other 2: Queue Threshold 3: Arrival Rate.
ValueMap | string | 1, 2, 3
Values | string | Other, Queue Threshold, Arrival Rate
DropperType | uint16 |

Description

string

This property is an enumerated 16-bit unsigned integer that defines the type of dropper. Its Values are: 1: Other 2: Random 3: HeadTail 4: Absolute Dropper Note: The DropperType property and the DropperService subclasses provide similar information. This property is defined for query purposes and to not require a subclass for all types of DropperServices (for example, to describe an Absolute Dropper in today's model). Therefore, DropperService can be instantiated directly and the Type property is needed.

ModelCorrespondence | string | CIM_DropperService.OtherDropperType
ValueMap | string | 1, 2, 3, 4
Values | string | Other, Random, HeadTail, Absolute Dropper
DropStartMetric | uint16 |

Description

string

This property is an enumerated unsigned 16-bit integer that defines the metric used to trigger the start of dropping packets. This does NOT mean that all packets will be dropped; it does mean that SOME packets will start to be dropped. The number and type of packets dropped is a function of the type of algorithm used by this Dropper. Values are: 1: Other 2: Queue Threshold 3: Arrival Rate.

ValueMap | string | 1, 2, 3
Values | string | Other, Queue Threshold, Arrival Rate
OtherDropperType | string |
Description | string | This property contains a vendor-specific value for the type of dropping that is done. It is used when the value of the DropperType property is 1 (Other).
ModelCorrespondence | string | CIM_DropperService.DropperType

### Inherited Properties

Name | Data Type | Class Origin
--- | --- | ---
Caption | string | CIM_ManagedElement
CommunicationStatus | uint16 | CIM_ManagedSystemElement
CreationClassName | string | CIM_Service
Description | string | CIM_ManagedElement
DetailedStatus | uint16 | CIM_ManagedSystemElement
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
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