ETSI GR NFV-EVE 019 V5.1.1 (2023-10)

Network Functions Virtualisation (NFV) Release 5; Architectural Framework; Report on VNF generic OAM functions

RGR/NFV-EVE019ed511

General Information

• Status: Not Published
• Technical Committee: NFV EVE - Evolution and Ecosystem
• Current Stage: 12 - Completion
• Due Date: 12-Oct-2023
• Completion Date: 05-Oct-2023

Standards Content (Sample)

GROUP REPORT
Network Functions Virtualisation (NFV) Release 5;
Architectural Framework;
Report on VNF generic OAM functions
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-EVE 019 V5.1.1 (2023-10)

Reference
RGR/NFV-EVE019ed511
Keywords
architecture, automation, configuration,
management, MANO, NFV, OAM
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ETSI
3 ETSI GR NFV-EVE 019 V5.1.1 (2023-10)
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, symbols and abbreviations . 9
3.1 Terms . 9
3.2 Symbols . 10
3.3 Abbreviations . 10
4 Use Cases . 10
4.1 Overview . 10
4.2 Use cases related to LCM of VNF generic OAM functions . 10
4.2.1 Use case: Instantiation of VNFs using VNF generic OAM functions managed by NFV-MANO. 10
4.2.1.1 Introduction . 10
4.2.1.2 Actors and roles . 11
4.2.1.3 Trigger . 11
4.2.1.4 Pre-conditions . 11
4.2.1.5 Post-conditions . 11
4.2.1.6 Operational Flows . 12
4.2.2 Use case: Termination of VNF instances using VNF generic OAM functions managed by NFV-
MANO . 12
4.2.2.1 Introduction . 12
4.2.2.2 Actors and roles . 12
4.2.2.3 Trigger . 13
4.2.2.4 Pre-conditions . 13
4.2.2.5 Post-conditions . 13
4.2.2.6 Operational Flows . 13
4.2.3 Use case: Lifecycle management of VNF generic OAM function managed by NFV-MANO . 14
4.2.3.1 Introduction . 14
4.2.3.2 Actors and roles . 14
4.2.3.3 Trigger . 14
4.2.3.4 Pre-conditions . 14
4.2.3.5 Post-conditions . 15
4.2.3.6 Operational Flows . 15
4.3 Use cases related to type of VNF generic OAM functions . 16
4.3.1 Use case: Log aggregator function . 16
4.3.1.1 Introduction . 16
4.3.1.2 Actors and roles . 17
4.3.1.3 Trigger . 17
4.3.1.4 Pre-conditions . 18
4.3.1.5 Post-conditions . 18
4.3.1.6 Operational Flows . 18
4.3.2 Use case: Log analyser function . 18
4.3.2.1 Introduction . 18
4.3.2.2 Actors and roles . 19
4.3.2.3 Trigger . 19
4.3.2.4 Pre-conditions . 19
4.3.2.5 Post-conditions . 20
4.3.2.6 Operational Flows . 20
4.3.3 Use case: Traffic enforcer function . 20
4.3.3.1 Introduction . 20
4.3.3.2 Actors and roles . 21
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4 ETSI GR NFV-EVE 019 V5.1.1 (2023-10)
4.3.3.3 Trigger . 21
4.3.3.4 Pre-conditions . 21
4.3.3.5 Post-conditions . 22
4.3.3.6 Operational Flows . 22
4.3.4 Use case: VNF metrics aggregator function . 22
4.3.4.1 Introduction . 22
4.3.4.2 Actors and roles . 23
4.3.4.3 Trigger . 23
4.3.4.4 Pre-conditions . 23
4.3.4.5 Post-conditions . 24
4.3.4.6 Operational Flows . 24
4.3.5 Use case: VNF metrics analyser function . 24
4.3.5.1 Introduction . 24
4.3.5.2 Actors and roles . 25
4.3.5.3 Trigger . 25
4.3.5.4 Pre-conditions . 25
4.3.5.5 Post-conditions . 25
4.3.5.6 Operational Flows . 26
4.3.6 Use case: Time function . 26
4.3.6.1 Introduction . 26
4.3.6.2 Actors and roles . 27
4.3.6.3 Time synchronization (base flow #1) . 27
4.3.6.3.1 Introduction . 27
4.3.6.3.2 Trigger . 27
4.3.6.3.3 Pre-conditions . 28
4.3.6.3.4 Post-conditions . 28
4.3.6.3.5 Operational Flow #1 . 28
4.3.6.4 Time re-synchronization after drift (base flow #2) . 28
4.3.6.4.1 Introduction . 28
4.3.6.4.2 Trigger . 28
4.3.6.4.3 Pre-conditions . 29
4.3.6.4.4 Post-conditions . 29
4.3.6.4.5 Operational Flow #2 . 29
4.3.7 Use case: Notification manager function . 30
4.3.7.1 Introduction . 30
4.3.7.2 Actors and roles . 30
4.3.7.3 Trigger . 30
4.3.7.4 Pre-conditions . 30
4.3.7.5 Post-conditions . 31
4.3.7.6 Operational Flows . 31
4.3.8 Use case: Network configuration manager function . 31
4.3.8.1 Introduction . 31
4.3.8.2 Actors and roles . 32
4.3.8.3 Trigger . 32
4.3.8.4 Pre-conditions . 33
4.3.8.5 Post-conditions . 33
4.3.8.6 Operational Flows . 33
4.3.9 Use case: Upgrade VNF function . 34
4.3.9.1 Introduction . 34
4.3.9.2 Actors and roles . 35
4.3.9.3 Trigger . 35
4.3.9.4 Pre-conditions . 35
4.3.9.5 Post-conditions . 35
4.3.9.6 Operational Flows . 36
4.3.10 Use case: VNF configuration manager function . 37
4.3.10.1 Introduction . 37
4.3.10.2 Actors and roles . 38
4.3.10.3 Trigger . 38
4.3.10.4 Pre-conditions . 38
4.3.10.5 Post-conditions . 38
4.3.10.6 Operational Flows . 39
4.3.11 Use case: VNF testing manager . 40
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5 ETSI GR NFV-EVE 019 V5.1.1 (2023-10)
4.3.11.1 Introduction . 40
4.3.12 Use case: Policy Management for VNF Generic OAM Functions . 41
4.3.12.1 Introduction . 41
4.3.12.2 Actors and roles . 42
4.3.12.3 Trigger . 42
4.3.12.4 Pre-conditions . 42
4.3.12.5 Post-conditions . 42
4.3.12.6 Operational Flows . 42
4.4 Use cases related to additional functionalities of VNF generic OAM functions . 43
4.4.1 Use cases: Management aspects of VNF connectivity. 43
4.4.1.1 Introduction . 43
4.4.1.2 Use case: Add VNF to the service mesh and establish connectivity using the Network
Configuration Manager Function . 44
4.4.1.2.1 Introduction . 44
4.4.1.2.2 Actors and roles . 44
4.4.1.2.3 Trigger . 45
4.4.1.2.4 Pre-conditions . 45
4.4.1.2.5 Post-conditions . 45
4.4.1.2.6 Operational Flows . 45
4.4.1.3 Use case: Update network configuration in a Service mesh . 46
4.4.1.3.1 Introduction . 46
4.4.1.3.2 Actors and roles . 46
4.4.1.3.3 Trigger . 46
4.4.1.3.4 Pre-conditions . 46
4.4.1.3.5 Post-conditions . 46
4.4.1.3.6 Operational Flows . 47
4.4.1.4 Use case: Intra-NFVI-PoP network connectivity testing . 47
4.4.1.4.1 Introduction . 47
4.4.1.4.2 Actors and roles . 48
4.4.1.4.3 Trigger . 48
4.4.1.4.4 Pre-conditions . 49
4.4.1.4.5 Post-conditions . 49
4.4.1.4.6 Operational Flows . 49
4.4.1.5 Use case: Inter-NFVI-PoP network connectivity testing . 50
4.4.1.5.1 Introduction . 50
4.4.1.5.2 Actors and roles . 51
4.4.1.5.3 Trigger . 51
4.4.1.5.4 Pre-conditions . 51
4.4.1.5.5 Post-conditions . 52
4.4.1.5.6 Operational Flows . 52
4.4.2 Use cases: VNF generic OAM functions for autonomous management . 52
4.4.2.1 Overview . 52
4.4.2.2 Use case: VNF generic OAM functions in automated Network Service alarm analysis (without
the Log analyser and the VNF metrics analyser) . 53
4.4.2.2.1 Introduction . 53
4.4.2.2.2 Actors and roles . 53
4.4.2.2.3 Trigger . 53
4.4.2.2.4 Pre-conditions . 54
4.4.2.2.5 Post-conditions . 54
4.4.2.2.6 Operational Flows . 54
4.4.2.3 Use case: VNF generic OAM functions in automated Network Service alarm analysis (with Log
and Metrics analysers involvement) . 55
4.4.2.3.1 Introduction . 55
4.4.2.3.2 Actors and roles . 55
4.4.2.3.3 Trigger . 55
4.4.2.3.4 Pre-conditions . 56
4.4.2.3.5 Post-conditions . 56
4.4.2.3.6 Operational Flows . 56
4.4.2.4 Use case: VNF generic OAM functions in automated Network Service alarm analysis (extending
the scope of MDAF). 57
4.4.2.4.1 Introduction . 57
4.4.2.4.2 Actors and roles . 58
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6 ETSI GR NFV-EVE 019 V5.1.1 (2023-10)
4.4.2.4.3 Trigger . 58
4.4.2.4.4 Pre-conditions . 58
4.4.2.4.5 Post-conditions . 59
4.4.2.4.6 Operational Flows . 59
4.4.2.5 Use case: VNF generic OAM functions in automated Network Service health monitoring . 59
4.4.2.5.1 Introduction . 59
4.4.2.5.2 Actors and roles . 61
4.4.2.5.3 Trigger . 62
4.4.2.5.4 Pre-conditions . 62
4.4.2.5.5 Post-conditions . 62
4.4.2.5.6 Operational Flows . 62
4.4.2.6 Use case: Extended MDAF and Policy agent for automated traffic rerouting and isolation . 63
4.4.2.6.1 Introduction . 63
4.4.2.6.2 Actors and roles . 64
4.4.2.6.3 Trigger . 64
4.4.2.6.4 Pre-conditions . 65
4.4.2.6.5 Post-conditions . 65
4.4.2.6.6 Operational Flows . 65
5 Use Cases analysis . 66
5.1 Overview . 66
5.2 Use cases related to LCM of VNF generic OAM functions . 66
5.3 Use cases related to types of VNF generic OAM functions . 67
5.4 Use cases related to functionality currently provided by VNFs . 69
5.5 Use cases related to functionality currently provided by OSS/BSS and EM . 69
5.6 Characteristics of VNF generic OAM functions . 69
5.7 Comparison of VNF generic OAM functions and VNF common services . 71
6 Framework and potential solutions . 72
6.1 Introduction . 72
6.2 Framework . 72
6.2.1 Overview of interactions . 72
6.2.2 Types of functions of generic OAM . 73
6.3 Solution A: Introducing generic OAM as a new functional block . 74
6.3.1 Introduction. 74
6.3.2 Internal interactions of each function in generic OAM FB . 74
6.3.3 Interaction of Generic OAM FB and other functions/functional blocks . 75
6.4 Solution B: Extending existing functional blocks for Generic OAM functionality. 75
6.4.1 Introduction. 75
6.4.2 Solution B1: Splitting of functionalities into existing functional blocks . 75
6.4.3 Solution B2: Splitting of functionalities into existing functional block . 76
6.5 Solution C: Generic OAM functions as VNF . 77
6.6 Analysis . 77
6.6.1 Introduction. 77
6.6.2 Solution A: Introducing generic OAM as a new functional block . 78
6.6.3 Solution B: Extending existing functional blocks for Generic OAM functionality . 78
6.6.4 Solution C: Generic OAM functions as VNF . 78
7 Recommendations . 79
7.1 Overview . 79
7.2 Recommendations towards VNF generic OAM functions . 79
8 Conclusion . 82
Annex A: Change History . 83
History . 84

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7 ETSI GR NFV-EVE 019 V5.1.1 (2023-10)
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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-EVE 019 V5.1.1 (2023-10)
1 Scope
The present document analyses and defines the type of OAM functions for VNFs that can be generalized and be
provided as a "generic function" supporting e.g. the provisioning, connectivity, configuration and monitoring of VNFs
on a virtualised platform. The present document also describes possible solutions to realize such generic OAM
functions.
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 GR NFV 003: "Network Functions Virtualisation (NFV); Terminology for Main Concepts in
NFV".
[i.2] ETSI GR NFV-IFA 029: "Network Functions Virtualisation (NFV) Release 3; Architecture;
Report on the Enhancements of the NFV architecture towards "Cloud-native" and "PaaS"".
[i.3] ETSI GS NFV-IFA 027: "Network Functions Virtualisation (NFV) Release 4; Management and
Orchestration; Performance Measurements Specification".
[i.4] ETSI GS NFV-SOL 016: "Network Functions Virtualisation (NFV) Release 3; Protocols and Data
Models; NFV-MANO procedures specification".
[i.5] ETSI GS NFV-IFA 008: "Network Functions Virtualisation (NFV) Release 4; Management and
Orchestration; Ve-Vnfm reference point - Interface and Information Model Specification".
[i.6] ETSI GS NFV-IFA 031: "Network Functions Virtualisation (NFV) Release 4; Management and
Orchestration; Requirements and interfaces specification for management of NFV-MANO".
[i.7] ETSI GS NFV-IFA 010: "Network Functions Virtualisation (NFV) Release 4; Management and
Orchestration; Functional requirements specification".
[i.8] ETSI GS NFV-IFA 009: "Network Functions Virtualisation (NFV); Management and
Orchestration; Report on Architectural Options".
...