This model is based on the ETSI model defined in IFA014/IFA015 v2.4.4
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Class Diagram
Classes
NSD - Network Service Descriptor
The NSD class is a deployment template whose instances are used by the NFVO for the lifecycle management of NSs.
Applied stereotypes:
- OpenModelClass
- support: MANDATORY
- Preliminary
Attribute Name | Type | Mult. | Stereotypes | Description |
nsdIdentifier | Identifier | 1 | Preliminary OpenModelAttribute
| Identifier of this NSD class. It globally uniquely identifies an instance of the NSD
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autoScalingRule | Rule | 0..* | Preliminary OpenModelAttribute
| Specifies a rule to trigger a scaling action on a NS instantiated according to the NSD. NOTE 1: The rule is based on a combination of assertions on the values of virtualised resource-related performance metrics and VNF Indicators identified by the monitoredInfo attribute. NOTE 2: There may be multiple data sources (each identified as monitoredInfo) per rule
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monitoredInfo | MonitoredData | 0..* | Preliminary OpenModelAttribute
| Identifies either a virtualised resource-related performance metric or a VNF Indicator.
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lifeCycleManagementScript | NsLifeCycleManagementScript | 0..* | Preliminary OpenModelAttribute
| Provides a life cycle management script written in a Domain Specific Language (DSL).
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security | SecurityParameters | 1 | Preliminary OpenModelAttribute
| Provides a signature to prevent tampering.
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_nsdf | NsDf | 1..* | Experimental OpenModelAttribute
| Identifies a DF within the scope of an NSD.
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_sapd | Sapd | 0..* | Experimental OpenModelAttribute
| Provides the descriptor of a SAP of the NS.
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_vnffgd | Vnffgd | 0..* | Experimental OpenModelAttribute
| Provides the descriptors of the applicable forwarding graphs. Cardinality of 0 means that the NS is a NF set with unspecified connectivity.
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_virtualLinkdesc | NsVirtualLinkDesc | 0..* | Preliminary OpenModelAttribute
| Provides the constituent VLDs. Cardinality of 0 means that the NS is a NF set with unspecified connectivity.
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_vnfdId | Vnfd | 0..* | Preliminary OpenModelAttribute
PassedByReference | References the VNFD of a constituent VNF.
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_pnfdId | Pnfd | 0..* | Experimental OpenModelAttribute
PassedByReference | References the PNFD of a constituent PNF.
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_nestedNsdId | NetworkServiceDescriptor | 0..* | Preliminary OpenModelAttribute
| References the NSD of a constituent nested NS.
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NSVirtualLinkDesc - Network Service Virtual Link Descriptor
The NsVirtualLinkDesc class provides general information enabling the instantiation of virtual links.
Parent class: VirtualLinkDesc
Applied stereotypes:
- OpenModelClass
- support: MANDATORY
- Preliminary
Attribute Name | Type | Mult. | Stereotypes | Description |
vitualLinkDescProvider | String | 0..1 | Preliminary OpenModelAttribute
| Defines the organization generating the VLD.
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virtuaLinkDescVersion | Version | 1 | Preliminary OpenModelAttribute
| Specifies the version of the VLD.
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virtualLinkDf | VirtualLinkDf | 1..* | Preliminary OpenModelAttribute
| Specifies properties for instantiating a VL according to a specific flavour.
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security | SecurityParameters | 0..1 | Preliminary OpenModelAttribute
| Provides a signature to prevent tampering.
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virtualLinkDescId | Identifier | 1 | Preliminary OpenModelAttribute
| Uniquely identifies a VLD in the parent descriptor. For VnfVirtualLinkDesc, the parent descriptor is the VNFD. For NsVirtualLinkDesc, the parent descriptor is the NSD. Note: the description of this class are different in ETSI GS NFV IFA 011 and ETSI GS NFV IFA 014. The present definition merges the 2 definitions.
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connectivityType | ConnectivityType | 1 | Preliminary OpenModelAttribute
| Specifies the protocol exposed by a VL and the flow pattern supported by the VL.
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testAccess | String | 0..* | Preliminary OpenModelAttribute
| Specifies test access facilities expected on the VL (e.g. none, passive monitoring, or active (intrusive) loopbacks at endpoints.
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description | String | 0..1 | Preliminary OpenModelAttribute
| Provides human-readable information on the purpose of the VL (e.g. control plane traffic).
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Sapd - Service Access Point Descriptor
The SAPD class specifies the information used to instantiate the service access points of an NS. A Sapd inherits from the Cpd class. All attributes of the Cpd are also attributes of the Sapd.
Parent class: Cpd
Applied stereotypes:
- OpenModelClass
- support: MANDATORY
- Experimental
NsDf - Network Service Deployment Flavor
The NsDf class specifies the properties of a variant of an NS. NOTE: Every VNF, VL and nested NS whose descriptor is referenced by the NS DF shall be involved in an NS instantiation level of the parent NS. If no instances of a given VNF/nested NS have to be deployed at NS instantiation time, the numberOfInstances attribute in the corresponding VnfToLevelMapping/NsToLevelMapping datatype shall be set to 0.
Applied stereotypes:
- OpenModelClass
- support: MANDATORY
- Experimental
Vnffgd - VNF Forwarding Graph Descriptor
The Vnffgd class specifies a topology of connectivity of a NS and optionally forwarding rules applicable to the traffic conveyed over this topology.
Applied stereotypes:
- OpenModelClass
- support: MANDATORY
- Experimental
Pnfd - PNF Descriptor
The Pnfd class is a deployment template enabling on-boarding PNFs and referencing them from an NSD. It focuses on connectivity aspects only.
Applied stereotypes:
- OpenModelClass
- support: MANDATORY
- Experimental
Vnfd - VNF Descriptor
See VNFD Model
VnfExtCpd - VNF External CP Descriptor
See VNFD Model
Datatypes
MonitoredData
The MonitoredData datatype identifies information to be monitored during the lifetime of a network service instance.
Attribute Name | Type | Mult. | Access | Stereotypes | Description |
vnfIndicatorInfo | VnfIndicatorData | 0..1 | RW | OpenModelAttribute
| Uniquely identifies the VNF Indicator class. One and only one of the attributes shall be included (i.e. there is a XOR relationship between the attributes).
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monitoringParameter |
| 0..1 | RW | OpenModelAttribute
| Specifies the virtualised resource related performance metric to be monitored on an NS level or VNF level. One and only one of the attributes shall be included (i.e. there is a XOR relationship between the attributes).
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NsLifeCycleManagementScript
The LifeCycleManagementScript information element specifies a script for the NS.
Attribute Name | Type | Mult. | Access | Stereotypes | Description |
event | String | 1..* | RW | OpenModelAttribute
| Describes NS lifecycle event(s) or an external stimulus detected on an NFVO reference point. NOTE 1: A minimum set of NS lifecycle events triggered internally by the NFVO includes: start instantiation, end instantiation, start scaling, end scaling, start healing, end healing, start termination, end termination, start update, end update. NOTE 2: A minimum set of external stimulus includes: the receipt of request message of instantiation, scaling, healing, termination, update of NS.
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script | String | 1 | RW | OpenModelAttribute
| Includes an NS LCM script (e.g., written in a DSL) triggered to react to one of the events listed in the event attribute.
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VirtualLinkDf
The VirtualLinkDf datatype specifies properties for instantiating a VL according to a specific flavour.
Attribute Name | Type | Mult. | Access | Stereotypes | Description |
flavourId |
| 1 | RW | Preliminary OpenModelAttribute
| Identifies this VirtualLinkDF datatype within a VLD.
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qos | NsQoS | 0..1 | RW | Preliminary OpenModelAttribute
| Specifies quality of service parameters applicable to a VL.
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serviceAvaibilityLevel | ServiceAvailabilityLevel |
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0..1 | RW | Preliminary OpenModelAttribute
| Specifies one of the three levels defined in ETSI GS NFV-REL 001: • Level 1 • Level 2 • Level 3
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ConnectivityType
Attribute Name | Type | Mult. | Access | Stereotypes | Description |
layerProtocol | LayerProtocol | 1 | RW | OpenModelAttribute
| Identifies the protocol this VL gives access to (Ethernet, MPLS, ODU2, IPV4, IPV6, Pseudo-Wire).
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flowPattern | String | 0..1 | RW | OpenModelAttribute
| Identifies the flow pattern of the connectivity (Line, Tree, Mesh).
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SecurityParameters
The SecurityParameters contains the signature of a NSD, VLD, PNFD or VNFFGD instance together with information required to validate the signature.
Attribute Name | Type | Mult. | Access | Stereotypes | Description |
signature | String | 1 | RW | OpenModelAttribute
| Provides the signature of the signed part of the descriptor.
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algorithm | String | 1 | RW | OpenModelAttribute
| Identifies the algorithm used to compute the signature.
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certificateinvalid | 0..1 | RW | OpenModelAttribute
| Provides a certificate or a reference to a certificate to validate the signature. NOTE: Cardinality of 0 corresponds to the case where the certificate is provided by means outside the NSD |
NsQos
The NsQoS datatype specifies quality of service parameters applicable to a NS VL.
Parent Datatype: QoS
Attribute Name | Type | Mult. | Access | Stereotypes | Description |
priority | Integer | 0..1 | RW | Preliminary OpenModelAttribute
| Specifies the priority level in case of congestion on the underlying physical links.
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latency | Number | 1 | RW | Preliminary OpenModelAttribute
| Maximum latency in ms.
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packetDelayVariation | Number | 1 | RW | Preliminary OpenModelAttribute
| Maximum jitter in ms.
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packetLossRatio | Number | 0..1 | RW | Preliminary OpenModelAttribute
| Maximum packet loss ratio. Cardinality is 0 if no packetLossRatio requirement exists.
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Enumerations
ServiceAvailabilityLevel
Specifies one of the three levels defined in ETSI GS NFV-REL 001: • Level 1 • Level 2 • Level 3
Contains Enumeration Literals:
- LEVEL_1:
- LEVEL_2:
- LEVEL_3:
Primitives
Number
This primitive type is a superset of the standard UML numbering primitives, e.g. Integer and Real.
Version
This primitive type defines the version of an element.