Class CIM_AFService
extends CIM_DiffServService

This class represents a specialization to the general concept of forwarding network traffic by adding specific semantics that characterize the operation of the Assured Forwarding (AF) Service (RFC2597). This RFC defines four different AF classes to represent four different treatments of traffic (e.g., a different amount of forwarding resources, such as buffer space and bandwidth, are allocated). Within each AF class, IP packets are marked with one of three possible drop precedence values. The drop precedence of a packet determines the relative importance of that packet compared to other packets within the same AF class if congestion occurs. A congested interface will try to avoid dropping packets with a lower drop precedence value by instead discarding packets with a higher drop precedence value. Note that [R2597] defines 12 DSCPs that together represent the AF Per Hop Behavior (PHB) group. Implementations are free to extend this (e.g., add more classes and/or drop precedences). The AFService class is modeled as a specialization of DiffServService, which is in turn a specialization of QoSService. This enables it to be related to higher-level QoSServices, as well as to lower-level conditioning sub-services (e.g., classification, metering, dropping, queuing, and others).

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_DiffServService
   |
   +--CIM_AFService

Direct Known Subclasses

Class Qualifiers

NameData TypeValue
DescriptionstringThis class represents a specialization to the general concept of forwarding network traffic by adding specific semantics that characterize the operation of the Assured Forwarding (AF) Service (RFC2597). This RFC defines four different AF classes to represent four different treatments of traffic (e.g., a different amount of forwarding resources, such as buffer space and bandwidth, are allocated). Within each AF class, IP packets are marked with one of three possible drop precedence values. The drop precedence of a packet determines the relative importance of that packet compared to other packets within the same AF class if congestion occurs. A congested interface will try to avoid dropping packets with a lower drop precedence value by instead discarding packets with a higher drop precedence value. Note that [R2597] defines 12 DSCPs that together represent the AF Per Hop Behavior (PHB) group. Implementations are free to extend this (e.g., add more classes and/or drop precedences). The AFService class is modeled as a specialization of DiffServService, which is in turn a specialization of QoSService. This enables it to be related to higher-level QoSServices, as well as to lower-level conditioning sub-services (e.g., classification, metering, dropping, queuing, and others).
UMLPackagePathstringCIM::Network::QoS
Versionstring2.7.0

Class Properties

Local Class Properties

NameData TypeDefault ValueQualifiers
NameData TypeValue
ClassNumberuint8
DescriptionstringThis property is an 8-bit unsigned integer that indicates the number of AF classes that this AF implementation uses. Among the instances aggregated into AFService (using QoSConditioningSubService), one SHOULD find markers with as many distinct values as is indicated by ClassNumber.
DropperNumberuint8
DescriptionstringThis property is an 8-bit unsigned integer that indicates the number of drop precedence values that this AF implementation uses. The number of drop precedence values is the number PER AF CLASS. The corresponding droppers are found in the collection of ConditioningServices aggregated by QoSConditioningSubService.

Inherited Properties

NameData TypeClass Origin
CaptionstringCIM_ManagedElement
CommunicationStatusuint16CIM_ManagedSystemElement
CreationClassNamestringCIM_Service
DescriptionstringCIM_ManagedElement
DetailedStatusuint16CIM_ManagedSystemElement
DSCPuint8CIM_DiffServService
ElementNamestringCIM_ManagedElement
EnabledDefaultuint16CIM_EnabledLogicalElement
EnabledStateuint16CIM_EnabledLogicalElement
HealthStateuint16CIM_ManagedSystemElement
InstallDatedatetimeCIM_ManagedSystemElement
InstanceIDstringCIM_ManagedElement
NamestringCIM_Service
OperatingStatusuint16CIM_ManagedSystemElement
OtherEnabledStatestringCIM_EnabledLogicalElement
PHBIDuint16CIM_DiffServService
PrimaryOwnerContactstringCIM_Service
PrimaryOwnerNamestringCIM_Service
PrimaryStatusuint16CIM_ManagedSystemElement
RequestedStateuint16CIM_EnabledLogicalElement
StartedbooleanCIM_Service
StartModestringCIM_Service
StatusstringCIM_ManagedSystemElement
SystemCreationClassNamestringCIM_Service
SystemNamestringCIM_Service
TimeOfLastStateChangedatetimeCIM_EnabledLogicalElement
TransitioningToStateuint16CIM_EnabledLogicalElement
AvailableRequestedStatesuint16[]CIM_EnabledLogicalElement
OperationalStatusuint16[]CIM_ManagedSystemElement
StatusDescriptionsstring[]CIM_ManagedSystemElement

Class Methods

Inherited Class Methods

NameReturn TypeClass Origin
RequestStateChangeuint32CIM_EnabledLogicalElement
StartServiceuint32CIM_Service
StopServiceuint32CIM_Service