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Network Service

- A composition of NFs/VNFs that defines an end-to-end functional and behavioral specification.

-Describes the relationship between VNFs and possibly PNFs that it contains and the links needed

to connect VNFs that are implemented in the NFVI network

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NSD Basics

The Network Service Descriptor is a deployment template that contain static information used in the process of on-boarding NSs
To enable dynamic composition of network services, NFV introduces Network Service Descriptors (NSDs) that specify the network service to be created..
It is used by the NFV Orchestrator to instantiate a Network Servic.
The NSD also describes deployment flavours of Network Service.

Elements of NSD

Param	Type	Cardinality	Description
id	string	1	Name/Id of given NSD
vender	string	1	Provider or vendor of the Network Service.
version	string	1	The version of the NSD
vnfd	list	1 - N	A list of VNF descriptors which are part of the Network Service
vld	list	0 - N	Virtual Link descriptors which are the part of Network Service
vnf_dependency	list	0 - N	Describe dependencies between VNF.
monitoring_ parameter	list	0-N	Represents a monitoring parameter which can be tracked for this NS.

Elements of NSD..

Id: sample-nsd

Vendor: tacker

Version: 1

Imports:

VNFDs

Vld:

Vnf_dependency:

vd1:

Source:

target:

parameters:

VNF Descriptor