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NSD Requirements:

1, VFC project requirement

VFC project implement ETSI NFVO, which needs to consume the NSD.
Image Added
In 3GPP management architecture, NFVO needs to expose SOL005 interfaces to 3GPP management system.

NSD needs to be uploaded into NFVO from OSS/BSS, and should be align to standard.

2, NSD vs ServiceD differences:

Service Descriptor in SDC R3: Service composites many resources in the SDC, including SDC AID resources(vf, extVL, AllottedResource) and R2+ resources.

NSD in VFC: NSD composites VNFD, PNFD, and NSVirtualLink, nested NSD, etc, ETSI NFV resources.

NSD requires to do some limitation in NFV resources composition, not all the SDC resources.

NSD related work pages:

NetworkService

ONAP R2+ Design-Time Service DM Input.

PNF resource IM proposal

Proposed Network Service Descriptor Model

Panel

borderStyle	solid
title	Node Type

Code Block

firstline	1
title	tosca.nodes.nfv.NS
linenumbers	true
collapse	true

  tosca.nodes.nfv.NS:
      derived_from: tosca.nodes.Root
      properties: 
        ns_id: 
          type: string
          required: true
        designer:
          type: string
          required: true
        version:
          type: string
          required: true
        name:
          type: string
          required: true
        invariant_id:
          type: string
          required: true
      capabilities:
        #monitoring_parameter:
          # modelled as ad hoc capabilities in VNF node template
      requirements:
        - virtual_link:
            capability:
               tosca.capabilities.nfv.VirtualLinkable
            relationship:
               tosca.relationships.nfv.VirtualLinksTo
            node: tosca.nodes.nfv.NsVirtualLink    # tosca.nodes.nfv.VL
            occurrences: [ 0, UNBOUNDED ]

Code Block

firstline	1
title	tosca.nodes.nfv.VNF
linenumbers	true
collapse	true

refer to https://wiki.onap.org/display/DW/Node+Type #tosca.nodes.nfv.VNF:

Code Block

firstline	1
title	tosca.nodes.nfv.PNF
linenumbers	true
collapse	true

tosca.nodes.nfv.PNF:
    derived_from: tosca.nodes.Root
    properties: 
      descriptor_id: # instead of pnfd_id
        type: string 
        required: true
      provider:
        type: string
        required: true
      version:
        type: string
        required: true
      descriptor_invariant_id:
        type: string # GUID
        required: true
      name:
        type: string
        required: true
      function_description:
        type: string
        required: true
      #geographical_location_info:        
      #  type: TBD
      #  required: true
    requirements:
       - virtual_link:
           capability: tosca.capabilities.nfv.VirtualLinkable
           relationship: tosca.relationships.nfv.VirtualLinksTo

Code Block

firstline	1
title	tosca.nodes.nfv.NsVirtualLink
linenumbers	true
collapse	true

  tosca.nodes.nfv.NsVirtualLink:
     derived_from:
       tosca.nodes.Root
       description: node definition of Virtual Links
     properties:
       provider:
         type: string
         required: false
       version:
         type: string
         required: true
       vl_profile
         type: tosca.datatypes.nfv.VlProfile # only covers nin/max bitrate requirements
         required: true
       connectivity_type:
         type: tosca.datatypes.nfv.ConnectivityType
         required: true
       qos:
         type: tosca.datatypes.nfv.Qos
         required: false
       service_availability:
         type: tosca.datatypes.nfv.ServiceAvailability
         required: false
      capabilities:
        VirtualLinkable:
          type: tosca.capabilities.nfv.VirtualLinkable

Panel

borderStyle	solid
title	Data Type:

Code Block

firstline	1
title	tosca.datatypes.nfv.ConnectivityType
linenumbers	true
collapse	true

tosca.datatypes.nfv.ConnectivityType:
  derived_from: tosca.datatypes.Root
  properties: 
    layer_protocol:
      type: string
      required: true
      constraints:
        - valid_values: [ethernet, mpls, odu2, ipv4, ipv6, pseudo_wire ]  
    flow_pattern:
      type: string
      required: false
      constraints:
        - valid_values: [Line, Tree, Mesh]

Code Block

firstline	1
title	tosca.datatypes.nfv.ServiceAvailability
linenumbers	true
collapse	true

tosca.datatypes.nfv.ServiceAvailability:
   derived_from: tosca.datatypes.Root
   description: service availability 
   properties:
     Level:
       type: string
       description: service availability levels
       required: true
       constraints:
          - valid_values: [ Level1, Level2,Level3 ]

Panel

borderStyle	solid
title	Capability

Code Block

firstline	1
title	tosca.capabilities.nfv.VirtualLinkable
linenumbers	true
collapse	true

tosca.capabilities.nfv.VirtualLinkable:
    derived_from: tosca.capabilities.network.Linkable

Panel

borderStyle	solid
title	Relationship

Code Block

firstline	1
title	tosca.relationships.nfv.VirtualLinksTo
linenumbers	true
collapse	true

tosca.relationships.nfv.VirtualLinksTo:
    derived_from: tosca.relationships.DependsOn
    valid_target_types: [ tosca.capabilities.nfv.VirtualLinkable ]

Panel

borderStyle	solid
title	NS Example

Code Block

firstline	1
title	NS Example
linenumbers	true
collapse	true

tosca_definitions_version:
tosca_simple_yaml_1_1
metadata:
  ...
imports:
- nodes:
    file: nodes.yml
- datatypes:
    file: data.yml
- capabilities:
    file: capabilities.yml
-relationships:
    file: relationships.yml


topology_template:
  inputs:
    # omitted here for brivity
  substitution_mappings:
    node_type: tosca.nodes.nfv.NS.example
node_templates:
    NsVL1:
      type: tosca.nodes.nfv.NsVirtualLink
      properties:     ...
    NsVL2:
      type: tosca.nodes.nfv.NsVirtualLink
      properties:     ...
    VNF1:
      type: tosca.nodes.nfv.VNF.VNF1
      properties: ...
      requirements:
        - virtualLink1: NsVL2
    VNF2:
      type: tosca.nodes.nfv.VNF.VNF2
      properties: ...
      requirements:
        - virtualLink1: NsVL1    
    VNF3:
      type: tosca.nodes.nfv.VNF.VNF3
      properties: ...
      requirements:
        - virtualLink1: NsVL1
        - virtualLink2: NsVL2
    PNF1:
      type:tosca.nodes.nfv.PNF.PNF1
      properties: ...
      requirements:
        - virtualLink1: NsVL1

###################VNF1 Template ##################
   .....
  substitution_mappings: 
    requirements: 
      virtualLink1: 
      - ext_port_1
      - virtual_link
    node_type: tosca.nodes.nfv.VNF.VNF1


###################VNF2 Template ##################
   .....
  substitution_mappings: 
    requirements: 
      virtualLink1: 
      - ext_port_1
      - virtual_link
    node_type: tosca.nodes.nfv.VNF.VNF2


###################VNF3 Template ##################
   .....
  substitution_mappings: 
    requirements: 
      virtualLink1: 
      - ext_port_1
      - virtual_link
      virtualLink2: 
      - ext_port_2
      - virtual_link
    node_type: tosca.nodes.nfv.VNF.VNF3


###################PNF1 Template ##################
   .....
  substitution_mappings: 
    requirements: 
      virtualLink1: 
      - ext_port_1
      - virtual_link
    node_type: tosca.nodes.nfv.PNF.PNF1

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