ETSI GR NFV-IFA 012 V3.1.1 (2018-10)

Network Functions Virtualisation (NFV) Release 3; Management and Orchestration; Report on Os-Ma-Nfvo reference point - application and service management use cases and recommendations

DGR/NFV-IFA012

General Information

• Status: Published
• Publication Date: 28-Oct-2018
• Technical Committee: NFV IFA - Interfaces and Architecture
• Current Stage: 12 - Completion
• Due Date: 23-Nov-2018
• Completion Date: 29-Oct-2018

Standards Content (Sample)

GROUP REPORT
Network Functions Virtualisation (NFV) Release 3;
Management and Orchestration;
Report on Os-Ma-Nfvo reference point - application and
service management use cases and recommendations
Disclaimer
The present document has been produced and approved by the Network Functions Virtualisation (NFV) ETSI Industry
Specification Group (ISG) and represents the views of those members who participated in this ISG.
It does not necessarily represent the views of the entire ETSI membership.

2 ETSI GR NFV-IFA 012 V3.1.1 (2018-10)

Reference
DGR/NFV-IFA012
Keywords
MANO, network, NFV, service, use case

ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2018.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.
TM TM
3GPP and LTE are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and
of the oneM2M Partners ®
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
3 ETSI GR NFV-IFA 012 V3.1.1 (2018-10)
Contents
Intellectual Property Rights . 7
Foreword . 7
Modal verbs terminology . 7
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 8
3 Definition of terms and abbreviations . 8
3.1 Terms . 8
3.2 Abbreviations . 9
4 Application & service management in NFV context . 10
4.1 Introduction . 10
4.2 Relation to other NFV group specifications . 10
5 General use cases . 10
5.1 Introduction . 10
5.2 NS lifecycle management in Broadband Network . 10
5.2.1 Use case description. 10
5.2.2 Trigger . 11
5.2.3 Actors and roles . 11
5.2.4 Pre-conditions . 12
5.2.5 Post-conditions . 12
5.2.6 Flow description . 12
5.3 NS monitoring in Broadband Network . 13
5.3.1 Use case description. 13
5.3.2 Trigger . 14
5.3.3 Actors and roles . 14
5.3.4 Pre-conditions . 14
5.3.5 Post-conditions . 15
5.3.6 Flow description . 15
5.4 Notification about a lack of capacity during NS LCM operation . 16
5.4.1 Use case description. 16
5.4.2 Trigger . 16
5.4.3 Actors and roles . 16
5.4.4 Pre-conditions . 17
5.4.5 Post-conditions . 17
5.4.6 Flow description . 17
5.5 Virtual Converged IP Messaging NS deployment . 17
5.5.1 Use case description. 17
5.5.2 Actors and roles . 18
5.5.3 Pre-conditions . 18
5.5.4 Post-conditions . 18
5.5.5 Flow description . 19
5.6 OSS requests an NS instance update from the NFVO . 19
5.6.1 Use case description. 19
5.6.2 Actors and roles . 19
5.6.3 Pre-conditions . 20
5.6.4 Post-conditions . 20
5.6.5 Flow description . 20
5.7 On-board NSD from OSS/BSS . 21
5.7.1 Use case description. 21
5.7.2 Actors and roles . 23
5.7.3 Pre-conditions . 23
5.7.4 Post-conditions . 23
5.7.5 Flow description . 23
ETSI
4 ETSI GR NFV-IFA 012 V3.1.1 (2018-10)
5.8 BSS/OSS Queries VNFs . 24
5.8.1 Use case Description . 24
5.8.2 Actors and roles . 24
5.8.3 Pre-conditions . 25
5.8.4 Post-conditions . 25
5.8.5 Flow description . 25
5.9 BSS/OSS is notified of VNF Package on-boarding . 25
5.9.1 Use case Description . 25
5.9.2 Actors and roles . 25
5.9.3 Pre-conditions . 26
5.9.4 Post-conditions . 26
5.9.5 Flow description . 26
5.10 BSS/OSS Queries NSDs . 27
5.10.1 Use case Description . 27
5.10.2 Actors and roles . 27
5.10.3 Pre-conditions . 27
5.10.4 Post-conditions . 27
5.10.5 Flow description . 28
5.11 NFVO updates BSS/OSS with NSD information after NSD on-boarding . 28
5.11.1 Use case Description . 28
5.11.2 Actors and roles . 28
5.11.3 Pre-conditions . 28
5.11.4 Post-conditions . 29
5.11.5 Flow description . 29
5.12 OSS requests a QoS update in connection with an NSD . 29
5.12.1 Use case Description . 29
5.12.2 Trigger . 30
5.12.3 Actors and roles . 30
5.12.4 Pre-conditions . 30
5.12.5 Post-conditions . 30
5.12.6 Flow description . 30
5.13 Instantiate Multiple Concatenated NSs . 31
5.13.1 Use case Description . 31
5.13.1.1 Introduction . 31
5.13.1.2 Parallel vs Sequential NS Instantiation requests . 32
5.13.1.3 NS instantiation requests to different NFVOs . 32
5.13.1.4 Utilizing an existing NS instantiation . 33
5.13.2 Actors and roles . 33
5.13.3 Pre-conditions . 33
5.13.4 Post-conditions . 34
5.13.5 Flow description . 34
5.14 Use Case for OSS/BSS instantiation of hybrid PNF/VNF NS . 35
5.14.1 Use case Description . 35
5.14.2 Actors and roles . 37
5.14.3 Pre-conditions . 37
5.14.4 Post-conditions . 37
5.14.5 Flow description . 37
5.15 VNF Configuration from OSS/BSS . 38
5.15.1 Use case Description . 38
5.15.2 Trigger . 40
5.15.3 Actors and roles . 40
5.15.4 Pre-conditions . 40
5.15.5 Post-conditions . 40
5.15.6 Flow description . 41
5.16 E2E service healing . 41
5.16.1 Use case Description . 41
5.16.2 Trigger . 42
5.16.3 Actors and roles . 42
5.16.4 Pre-conditions . 42
5.16.5 Post-conditions . 43
5.16.6 Flow description . 43
5.17 End to End Service Termination from the OSS/BSS . 44
ETSI
5 ETSI GR NFV-IFA 012 V3.1.1 (2018-10)
5.17.1 Use case Description . 44
5.17.1.1 Introduction . 44
5.17.1.2 Parallel vs Sequential NS Termination requests . 45
5.17.1.3 Network Service Termination requests to different NFVOs . 45
5.17.2 Trigger . 46
5.17.3 Actors and roles . 46
5.17.4 Pre-conditions . 47
5.17.5 Post-conditions . 47
5.17.6 Flow description . 47
5.18 Switching from several active Nsa instances to new NSb instances . 48
5.18.1 Use case Description . 48
5.18.2 Trigger . 48
5.18.3 Actors and roles . 48
5.18.4 Pre-conditions . 48
5.18.5 Post-conditions . 48
5.18.6 Flow description . 49
5.19 Deletion of NSD by the OSS . 50
5.19.1 Use case Description . 50
5.19.2 Trigger . 50
5.19.3 Actors and Roles . 50
5.19.4 Pre-conditions . 50
5.19.5 Post-conditions . 50
5.19.6 Flow Description . 50
5.20 Deletion of a specific version of NSD by the OSS . 51
5.20.1 Use case Description . 51
5.20.2 Trigger . 51
5.20.3 Actors and Roles . 51
5.20.4 Pre-conditions . 51
5.20.5 Post-conditions . 52
5.20.6 Flow Description . 52
5.21 Partial failure of concatenated service instantiation from OSS/BSS . 52
5.21.1 Use case Description . 52
5.21.2 Trigger . 53
5.21.3 Actors and Roles . 53
5.21.4 Pre-conditions . 53
5.21.5 Post-conditions . 53
5.21.6 Base Flow . 53
5.22 OSS Requests a NS Scale In . 54
5.22.1 Use case Description . 54
5.22.2 Trigger . 55
5.22.3 Actors and Roles . 55
5.22.4 Pre-conditions . 55
5.22.5 Post-conditions . 55
5.22.6 Flow Description . 55
5.23 OSS Copies VNF Package from one NFVO to another NFVO . 56
5.23.1 Use case Description . 56
5.23.2 Trigger . 56
5.23.3 Actors and Roles . 56
5.23.4 Pre-conditions . 57
5.23.5 Post-conditions . 57
5.23.6 Flow Description . 57
5.24 Use Case for an Application Function overlaying the NFV Ecosystem . 57
5.24.1 Use case Description . 57
5.24.2 Trigger . 59
5.24.3 Actors and Roles . 59
5.24.4 Pre-conditions . 59
5.24.5 Post-conditions . 60
5.24.6 Flow Description . 60
6 Reference point and interface recommendations . 60
6.1 Introduction . 60
6.2 Recommendations . 61
ETSI
6 ETSI GR NFV-IFA 012 V3.1.1 (2018-10)
6.2.1 Test recommendations . 61
6.2.2 Notification recommendations . 61
6.2.3 Heartbeat recommendations. 62
6.2.4 PM Job recommendations . 62
6.2.5 Threshold recommendations related to NS Performance Management . 62
6.2.6 General interface recommendations for the Os-Ma-Nfvo reference point . 63
Annex A (informative): NS Nesting . 64
A.1 Overview of Nested NSs . 64
A.2 Principles concerning Nested NS . 66
A.3 Composite vCDN Example . 66
A.4 Virtual Customer Premises Equipment (vCPE) NS Example with Connectivity . 67
A.5 Geographically Distributed virtual Content Delivery Network (vCDN) Example . 68
Annex B (informative): Authors & contributors . 70
Annex C: Bibliography . 71
Annex D: Change History . 72
History . 78

ETSI
7 ETSI GR NFV-IFA 012 V3.1.1 (2018-10)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This Group Report (GR) has been produced by ETSI Industry Specification Group (ISG) Network Functions
Virtualisation (NFV).
Modal verbs terminology
In the present document "should", "should not", "may", "need not", "will", "will not", "can" and "cannot" are to be
interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.

ETSI
8 ETSI GR NFV-IFA 012 V3.1.1 (2018-10)
1 Scope
The present document provides the use cases and recommendations associated with the Os-Ma-nfvo reference point
from the perspective of application and service management on top of Network Services (NSs).
2 References
2.1 Normative references
Normative references are not applicable in the present document.
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI GS NFV 003: "Network Functions Virtualisation (NFV); Terminology for Main Concepts in
NFV".
[i.2] ETSI GS NFV-IFA 009: "Network Functions Virtualisation (NFV); Management and
Orchestration; Report on Architectural Options".
[i.3] ETSI GS NFV-IFA 010: "Network Functions Virtualisation (NFV) Release 3; Management and
Orchestration; Functional requirements specification".
[i.4] ETSI GS NFV-IFA 013: "Network Functions Virtualisation (NFV) Release 3; Management and
Orchestration; Os-Ma-Nfvo reference point - Interface and Information Model Specification".
[i.5] ETSI GS NFV-IFA 008: "Network Functions Virtualisation (NFV) Release 3; Management and
Orchestration; Ve-Vnfm reference point - Interface and Information Model Specification".
[i.6] ETSI GS NFV-IFA 011: "Network Functions Virtualisation (NFV) Release 3; Management and
Orchestration; VNF Descriptor and Packaging Specification".
[i.7] ETSI GS NFV-IFA 014: "Network Functions Virtualisation (NFV) Release 3; Management and
Orchestration; Network Service Templates Specification".
3 Definition of terms and abbreviations
3.1 Terms
For the purposes of the present document, the terms given in ETSI GS NFV 003 [i.1] and the following apply:
end-to-end service: service spanning at least two end points which contains one or more Network Services
NOTE 1: End points can be user devices or network functions, virtualised or non-virtualised.
NOTE 2: This definition applies to the NFV context only.
ETSI
9 ETSI GR NFV-IFA 012 V3.1.1 (2018-10)
NS Adjacency: ability for NSs to directly communicate with each other
NOTE 1: A set of NSs that can directly communicate with each other are said to be "adjacent."
NOTE 2: Two NSs are said to directly communicate with each other if there is no intervening NS between the two
NSs.
NOTE 3: It is possible to further qualify NS adjacency, e.g. "NS adjacency among the nested NSs within a
composite".
NOTE 4: By extension, a composite NS is said to be adjacent to a nested NS if at least one of its constituent NFs
communicate with at least one of the constituent NFs of the nested NS.
NS Adjacency Graph: graph that shows adjacency relationships among a set of NSs
NOTE: NS adjacency graphs can be constructed for different purposes such as an adjacency graph for the nested
NSs within a composite NS, or the adjacency graph for an NS that is shared by several composite NSs.
3.2 Abbreviations
For the purposes of the present document, the abbreviations given in ETSI GS NFV 003 [i.1] and the following apply:
BSS Business Support Systems
CFS Customer Facing Service
CP Connection Point
CPE Customer Premises Equipment
CPM Converged IP Messaging
CSP Communication Service Provider
DB DataBase
E2E End-to-End
EvCPE Enterprise virtual Customer Premises Equipment
IaaS Infrastructure as a Service
KPI Key Performance Indicator
KQI Key Quality Indicator
LCM LifeCycle Management
MVNO Mobile Virtual Network Operator
NID Network Interface Device
NSD Network Service Descriptor
OSS Operational Support Systems
PaaS Platform as a Service
PE Provider Edge
PNFD Physical Network Function Descriptor
QoS Quality of Service
RFS Resource Facing Service
SAP Service Access Point
SLA Service Level Agreement
SQM Service Quality Management
vBRAS virtual Broadband Remote Access Server
vCDN virtual Content Delivery Network
vCPE virtual Customer Premises Equipment
vCS virtual Content Server
VIM Virtual Infrastructure Manager
vIMS virtual IP Multimedia Subsystem
VL Virtual Link
VLD Virtual Link Descriptor
VNFFGD VNF Forwarding Graph Descriptor
VRF Virtual Routing and Forwarding
vVAS virtual Value Added Service
WIM Wide area network Infrastructure Manager
ETSI
10 ETSI GR NFV-IFA 012 V3.1.1 (2018-10)
4 Application & service management in NFV context
4.1 Introduction
The present document provides a set of use cases that describe scenarios relating to application and service management
associated with an OSS/BSS interacting with the NFVO over the Os-Ma-Nfvo reference point. When an OSS/BSS is
managing an application or service that depends on a Network Service or Network Services that are provided by an
NFVO, the OSS/BSS will use a combination of operations within the interfaces provided by the NFVO over the Os-Ma-
Nfvo reference point to manage those Network Services.
The use cases described in the present document cover scenarios related to NS Creation, NS Monitoring, NS Updating,
NS Querying, NS Healing, and NS Scaling in the context of a higher level service. Some of the use cases provide
examples of specific application scenarios, such as vIMS, or a virtualised Home Network. Some use cases describe
scenarios that attempt to clarify potentially ambiguous uses of the operations defined by the various interfaces provided
by the Os-Ma-Nfvo reference point.
The present document also includes recommendations that have been created where a functionality has been identified
in the use case that is not presently covered by the interfaces or information models defined in the Os-Ma-Nfvo
reference point document ETSI GS NFV-IFA 013 [i.4].
4.2 Relation to other NFV group specifications
The present document is referencing information from the following NFV Group Specifications:
• Management and Orchestration - Report on Architectural Options ETSI GS NFV-IFA 009 [i.2].
The present document provides architectural options that can influence the way some of the Os-Ma-nfvo interfaces are
used or might even suggest the need for extension.
• Management and Orchestration - Functional requirements specification ETSI GS NFV-IFA 010 [i.3].
The key functional recommendations from the present document will provide the guidance that might influence the
functional requirements defined in ETSI GS NFV-IFA 010 [i.3].
• Management and Orchestration - Os-Ma-Nfvo reference point - Interface and Information Model Specification
ETSI GS NFV-IFA 013 [i.4].
The ETSI GS NFV-IFA 013 [i.4] covers the Os-Ma-nfvo reference point, specifying interfaces related to NSs and
VNFs. Work on application and end-to-end services done in the present document might directly impact requirements
defined for the interfaces and information models within the ETSI GS NFV-IFA 013 [i.4] specification.
5 General use cases
5.1 Introduction
Some few general use cases will be described. These are a help concerning explorations, descriptions, recommendations
and definitions regarding the Os-Ma-nfvo reference point.
5.2 NS lifecycle management in Broadband Network
5.2.1 Use case description
The main goal of this use case is to illustrate how NS lifecycle management related to the Os-Ma-nfvo reference point
are used in the context of E2E Service Management.
ETSI
11 ETSI GR NFV-IFA 012 V3.1.1 (2018-10)
Based on an order from the order management, OSS sends a request to NFVO to instantiate a NS "Internet" consisting
of the following three NSs to establish an E2E service called "Home Internet":
• NS "Internet (Data)" which includes VNF virtual Broadband Remote Access Server (vBRAS), VNF vRouter
(Internet Gateway Router)
• NS "Secure Internet Connection" which includes VNF "vFirewall", VNF "vParentControl"
• NS "Video Performance Optimization" which includes VNF "vVideoOptimizer"

Figure 5.2.1-1
5.2.2 Trigger
The order management orders an E2E service "Home Internet" with a NS "Int
...