1. NSD modeling: Rel2 Nagesha Subramanya nagesha. subramanya@nokia
NSD modeling: Rel2 Nagesha Subramanya Thinh Nguyenphu, Nokia
December 06, 2017

2. ETSI NFV Concept: Composite Network Services
Ref: ETSI NFV Tutorial at Layer123 The Hague

3. Ref: ETSI NFV Tutorial at Layer123 The Hague

4. Ref: ETSI NFV Tutorial at Layer123 The Hague

5. Ref: ETSI NFV Tutorial at Layer123 The Hague

6. IFA014: Figure 6.2.1-1: UML information diagram of NSD (v2.3.1)

7. NSD IE Node Type: tosca.nodes.nfv.NS Node Type: tosca.nodes.nfv.VNF
Properties: descriptor_id:
Node Type: tosca.nodes.nfv.PNF
Node Type:tosca.nodes.nfv.SAPD
Node Type: tosca.nodes.nfv.VL
Groups Type
Tosca.Capabilities.nfv.NsMonitoring
Interface Type:
Capabilities Type: tosca.capabilities.nfv.NsDeploymentFlavour

8. NS – As a Node   NS1 … NS2 NS is modelled a Node Type.
NS1 (abstract)
NS1
req: sap1
req
SAP1
req 
input
req: vnf1 ext cp
input
req
req
output
VL1
output
property
VNF1
NS2
PNF1
interfaces
cap: DF
cap: DF
NS2 …
NS2
req
NS is modelled a Node Type.
NS can have NS nodes
NS can be nested, referenced.
NS is substituted with a service template.
which provides implementation
combination of VNF, VL, NS…
req 
VNF2
VNF3
property … …
interfaces
cap: DF
cap: DF

9. Network Service Nodes tosca.nodes.nfv.NS.NS1 tosca.nodes.nfv.NS.NS3
NS1 (abstract)
NS3 (abstract)
req
input
input
req
output
output
property
tosca.nodes.nfv.NS.NS2
property
interfaces
NS2 (abstract)
interfaces
cap: DF
cap: DF
req
input
output
property
interfaces
cap: DF

10. NSD with Sap Node type NS In NFV (IFA014) the SAP has two options:
req NS
SAP
req
req
req VL
cap
cap
In NFV (IFA014) the SAP has two options:
It could be exposed as new CP on a VL or
It could be exposed as CP of one of the NS constituents (VNF ext CP/PNF ext CP/nested NS SAP) re-exposed as SAP. In this case there is no VL “inside NS” associated with the SAP of this NS. [Not shown in the above figure]
* Figure on the left shows both the concepts.
VNF#1
CP2
VNF#2
req
CP2
req
req
req
cap: DF
VDU
VDU
VirtualLinkable
VirtualBindable
VirtualBindable
VirtualLinkable

11. BACK Slide

12. SAP IE In NFV (IFA014) the SAP has two options:
It could be exposed as new CP on a VL or
It could be exposed as CP of one of the NS constituents (VNF ext CP/PNF ext CP/nested NS SAP) re-exposed as SAP. In this case there is no VL “inside NS” associated with the SAP of this NS.
ETSI GS NFV-IFA 014

13. SAP node_types: tosca.nodes.nfv.SAP: derived_from: tosca.nodes.nfv.CP
description: node definition of SAP.
properties:
sap_address_assignment:
type: boolean
required: true
default: true
requirements:
- virtualLinkable1: tosca.capabilities.nfv.VirtualLinkable
- virtualLinkable2: tosca.capabilities.nfv.VirtualLinkable
capabilities:
forwarder:
type: tosca.capabilities.nfv.Forwarderx