# 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 | 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
EnabledDefault | uint16 | CIM_EnabledLogicalElement
EnabledState | uint16 | CIM_EnabledLogicalElement
Generation | uint64 | CIM_ManagedElement
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
--- | --- | ---
ChangeAffectedElementsAssignedSequence | uint32 | CIM_Service
RequestStateChange | uint32 | CIM_EnabledLogicalElement
StartService | uint32 | CIM_Service
StopService | uint32 | CIM_Service