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Diffstat (limited to 'docs/ONAP release 1 spec/im')
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diff --git a/docs/ONAP release 1 spec/im/ns-im.rst b/docs/ONAP release 1 spec/im/ns-im.rst index 52b09d7..627cf02 100644 --- a/docs/ONAP release 1 spec/im/ns-im.rst +++ b/docs/ONAP release 1 spec/im/ns-im.rst @@ -5,12 +5,65 @@ ONAP Network Service Descriptor Information Model Specification (Amsterdam) Scope ----- +The scope of the present document is to describe the Network Service Descriptor (NSD) Information Model. + + Terms, Definitions and Abbreviations ------------------------------------ +For the purposes of the present document, the following abbreviations apply: + ++------------+--------------------------------------------+ +|Abbreviation| Definition | ++------------+--------------------------------------------+ +| CM | Conditional Mandatory | ++------------+--------------------------------------------+ +| CO | Conditional Optional | ++------------+--------------------------------------------+ +| CP | Connection Point | ++------------+--------------------------------------------+ +| CPD | Connection Point Description | ++------------+--------------------------------------------+ +| DF | Depoyment Flavour | ++------------+--------------------------------------------+ +| DSL | Domain Specific Language | ++------------+--------------------------------------------+ +| GS | Group Specification | ++------------+--------------------------------------------+ +| MANO | Management and Orchestration | ++------------+--------------------------------------------+ +| MPLS | Multi-Protocol Label Switching | ++------------+--------------------------------------------+ +| NCT | Network Connectivity Topology | ++------------+--------------------------------------------+ +| NFP | Network Forwarding Path | ++------------+--------------------------------------------+ +| NFPD | Network Forwarding Path Descriptor | ++------------+--------------------------------------------+ +| NSD | Network Service Descriptor | ++------------+--------------------------------------------+ +| UML | Unified Modeling Language | ++------------+--------------------------------------------+ +| VL | Virtual Link | ++------------+--------------------------------------------+ +| VLD | Virtual Link Descriptor | ++------------+--------------------------------------------+ + NSD Infomration Model Overview ------------------------------ +An Network Service (NS), as defined by ETSI NFV ISG is a composition of Network Functions (NF) arranged as a set of functions with unspecified connectivity between them or according to one or more forwarding graphs. + +The Network Service Descriptor (NSD) is a deployment template which consists of information used by the NFV Orchestrator (NFVO) for life cycle management of an NS. + +As illustrated in the following figure, the description of a NS as used by the NFV Management and Orchestration (MANO) functions to deploy an NS instance includes or references the descriptors of its constituent objects: + +* Zero, one or more Virtualized Network Function Descriptors (VNFD); +* Zero, one or more Physical Network connect PNFs to VLs; +* Zero, one or more nested NSD; +* Zero, one or more Virtual Link Descriptor (VLD) used by the NFVO to deploy Virtual Links (VL) ; and +* Zero, one or more VNF Forwarding Graph Descriptors (VNFFGD). + Functional Requirements ----------------------- |