# Class CIM_PrecedenceService
extends CIM_QoSService

This class represents a specialization of the general concept of forwarding network traffic by adding specific semantics that define how traffic is forwarded based on the value of the ToS byte of a packet. This class is used to enable DiffServ devices and non- DiffServ devices to exchange traffic. This is done by defining a sibling class, DiffServService, to represent devices that forward traffic based on the DiffServ code point. This enables the administrator to define mappings between devices that do not support DiffServ (and instead use IP Precedence) and those that do support DiffServ. PrecedenceService is deprecated since forwarding based on the value of the ToS byte is specified using a FilterList, which is associated with a ClassifierElement. If there is a need to distinguish a higher-level set of coordinated QoS services, the QoSService class can be instantiated directly.

### 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_QoSService
|
+--CIM_PrecedenceService

## Direct Known Subclasses

## Class Qualifiers

Name | Data Type | Value
--- | --- | ---
Deprecated | string | CIM_QoSService
Description | string | This class represents a specialization of the general concept of forwarding network traffic by adding specific semantics that define how traffic is forwarded based on the value of the ToS byte of a packet. This class is used to enable DiffServ devices and non- DiffServ devices to exchange traffic. This is done by defining a sibling class, DiffServService, to represent devices that forward traffic based on the DiffServ code point. This enables the administrator to define mappings between devices that do not support DiffServ (and instead use IP Precedence) and those that do support DiffServ. PrecedenceService is deprecated since forwarding based on the value of the ToS byte is specified using a FilterList, which is associated with a ClassifierElement. If there is a need to distinguish a higher-level set of coordinated QoS services, the QoSService class can be instantiated directly.
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
PrecedenceValue | uint8 |
Deprecated | string | CIM_IPHeadersFilter.HdrDSCP
Description | string | This property is an 8-bit unsigned integer that defines the notion of precedence for different types of traffic.

### Inherited Properties

Name | Data Type
--- | ---
Caption | string
CommunicationStatus | uint16
CreationClassName | string
Description | string
DetailedStatus | uint16
ElementName | string
EnabledDefault | uint16
EnabledState | uint16
Generation | uint64
HealthState | uint16
InstallDate | datetime
InstanceID | string
LoSID | string
LoSOrgID | string
Name | string
OperatingStatus | uint16
OtherEnabledState | string
PrimaryOwnerContact | string
PrimaryOwnerName | string
PrimaryStatus | uint16
RequestedState | uint16
Started | boolean
StartMode | string
Status | string
SystemCreationClassName | string
SystemName | string
TimeOfLastStateChange | datetime
TransitioningToState | uint16
AvailableRequestedStates | uint16[]
OperationalStatus | uint16[]
StatusDescriptions | string[]

## Class Methods

### Inherited Class Methods

Name | Return Type
--- | ---
ChangeAffectedElementsAssignedSequence | uint32
RequestStateChange | uint32
StartService | uint32
StopService | uint32