ETSI GR NFV-REL 011 V4.1.1 (2020-11)

Network Functions Virtualisation (NFV) Release 4; Management and Orchestration; Report on NFV-MANO software modification

RGR/NFV-REL011ed411

General Information

• Status: Not Published
• Technical Committee: NFV REL - Reliability & Availability
• Current Stage: 12 - Completion
• Due Date: 27-Nov-2020
• Completion Date: 27-Nov-2020

Standards Content (Sample)

ETSI GR NFV-REL 011 V4.1.1 (2020-11)






GROUP REPORT
Network Functions Virtualisation (NFV) Release 4;
Management and Orchestration;
Report on NFV-MANO software modification
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.

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2 ETSI GR NFV-REL 011 V4.1.1 (2020-11)



Reference
RGR/NFV-REL011ed411
Keywords
availability, MANO, NFV, service

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3 ETSI GR NFV-REL 011 V4.1.1 (2020-11)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 7
3 Definition of terms, symbols and abbreviations . 8
3.1 Terms . 8
3.2 Symbols . 9
3.3 Abbreviations . 9
4 Overview of NFV-MANO software modification . 10
4.1 NFV-MANO software modification process. 10
4.1.1 Introduction. 10
4.1.2 Main concepts . 10
4.1.3 Recovery procedures. 13
4.2 Architecture addressed by the NFV-MANO software modification . 15
4.2.1 Architectural refinement of NFV-MANO functional blocks . 15
4.2.2 Architectural options. 17
5 Software modification use cases . 18
5.1 Introduction . 18
5.2 NFV-MANO functional entities with internal support for their software modification . 19
5.2.1 Introduction. 19
5.2.2 NFV-MANO functional entities with seamless support for their software modification . 19
5.2.2.1 Introduction . 19
5.2.2.2 Actors and roles . 19
5.2.2.3 Pre-conditions . 20
5.2.2.4 Post-conditions . 20
5.2.2.5 Flow description for the software modification . 21
5.2.2.6 Flow description for the software rollback . 22
5.2.2.7 Flow description for the software modification with ongoing LCM/VRM operation . 22
5.2.2.8 Flow description for the software modification with parallel LCM/VRM operation . 24
5.2.3 NFV-MANO functional entities with non-seamless support for their software modification . 25
5.2.3.1 Introduction . 25
5.2.3.2 Actors and roles . 25
5.2.3.3 Pre-conditions . 26
5.2.3.4 Post-conditions . 26
5.2.3.5 Flow description for the software modification . 27
5.2.3.6 Flow description for the software rollback . 28
5.2.4 Special considerations for NFVO . 29
5.2.5 Special considerations for VNFM . 29
5.2.6 Special considerations for VIM . 30
5.3 NFV-MANO functional entities without internal support for their software modification . 30
5.3.1 Introduction. 30
5.3.2 NFV-MANO functional entities with redundancy units . 30
5.3.2.1 Introduction . 30
5.3.2.2 Actors and roles . 31
5.3.2.3 Pre-conditions . 31
5.3.2.4 Post-conditions . 32
5.3.2.5 Flow description for the software modification . 32
5.3.3 NFV-MANO functional entities not exposing their structure . 34
5.3.3.1 Introduction . 34
5.3.3.2 Actors and roles . 34
5.3.3.3 Pre-conditions . 34
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4 ETSI GR NFV-REL 011 V4.1.1 (2020-11)
5.3.3.4 Post-conditions . 35
5.3.3.5 Flow description for the software modification . 35
5.3.3.6 Flow description for the software rollback . 37
5.3.3.7 Flow description for the software modification with ongoing LCM/VRM operation . 38
5.3.3.8 Flow description for the software modification with parallel LCM/VRM operation . 39
5.3.4 Special considerations for NFVO . 41
5.3.5 Special considerations for VNFM . 41
5.3.6 Special considerations for VIM . 42
5.3.6.1 Actors and role mapping . 42
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5.3.6.2 Special considerations for VIM deployed using OpenStack . 42
5.4 Software modification of multiple NFV-MANO functional entities . 43
5.4.1 Introduction. 43
5.4.2 Simultaneous software modification of two NFV-MANO functional entities . 43
5.4.2.1 Introduction . 43
5.4.2.2 Actors and roles . 44
5.4.2.3 Pre-conditions . 44
5.4.2.4 Post-conditions . 45
5.4.2.5 Flow description for the software modification . 45
5.4.2.6 Flow description for the software rollback . 46
5.5 Change of the NFV-MANO deployed architectural option . 48
5.5.1 Introduction. 48
5.5.2 Replacing a S-VNFM with a G-VNFM . 48
5.5.2.1 Introduction . 48
5.5.2.2 Actors and roles . 50
5.5.2.3 Pre-conditions . 50
5.5.2.4 Post-conditions . 50
5.5.2.5 Flow description for the software modification . 51
5.5.2.6 Flow description for the software rollback . 52
5.6 Special considerations for containerised architectures . 53
5.6.1 Introduction. 53
5.6.2 Case of software modification with internal support . 53
5.6.2.1 Introduction . 53
5.6.2.2 CISM functionality embedded in the VIM example scenario . 54
5.6.2.3 CISM functionality distributed across VNFM and VIM example scenario . 54
5.6.2.4 CISM functionality as a standalone functional entity example scenario . 54
5.6.2.5 CISM functionality-only replacing VIM and VNFM example scenario . 54
5.6.2.6 CISM functionality embedded into VNF with support for shared container service example
scenario . 55
5.6.2.7 CISM functionality embedded into VNF without support for shared container service example
scenario . 55
5.6.3 Case of software modification without internal support . 55
5.6.3.1 Introduction . 55
5.6.3.2 CISM functionality embedded in the VIM example scenario . 56
5.6.3.3 CISM functionality distributed across VNFM and VIM example scenario . 56
5.6.3.4 CISM functionality as a standalone functional entity example scenario . 56
5.6.3.5 CISM functionality-only replacing VIM and VNFM example scenario . 57
5.6.3.6 CISM functionality embedded into VNF with support for shared container service example
scenario . 57
5.6.3.7 CISM functionality embedded into VNF without support for shared container service example
scenario . 57
5.7 Status monitoring and suspend operation . 58
5.7.1 NFV-MANO functional entities with internal support for their software modification . 58
5.7.1.1 Introduction . 58
5.7.1.2 Actors and roles . 58
5.7.1.3 Pre-conditions . 59
5.7.1.4 Post-conditions . 59
5.7.1.5 Flow description for the query and suspend operations . 60
5.7.1.6 Flow description for the status reporting with suspend operation . 61
5.7.2 NFV-MANO functional entities without internal support for their software modification . 62
5.7.2.1 Introduction . 62
5.7.2.2 Actors and roles . 62
5.7.2.3 Pre-conditions . 63
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5 ETSI GR NFV-REL 011 V4.1.1 (2020-11)
5.7.2.4 Post-conditions . 63
5.7.2.5 Flow description for the query and suspend operations . 64
5.8 Retry . 66
5.8.1 Introduction. 66
5.8.2 Actors and roles . 66
5.8.3 Pre-conditions . 67
5.8.4 Post-conditions . 67
5.8.5 Flow description for the retry procedure . 68
5.9 Fallback . 69
5.9.1 Introduction. 69
5.9.2 Actors and roles . 69
5.9.3 Pre-conditions . 70
5.9.4 Post-conditions . 70
5.9.5 Flow description for the fallback procedure . 70
6 Recommendations . 71
6.1 Introduction . 71
6.2 General recommendations for NFV-MANO functional entities . 71
6.3 Recommendations of functional requirements for NFV-MANO functional entities. 72
6.4 Recommendations for interfaces of NFV-MANO functional entities . 74
6.5 Recommendations for information associated with the software modification of NFV-MANO functional
entities . 75
6.6 Recommendations for the SMM . 76
7 Conclusion . 78
Annex A: Utilization of containers in NFV . . 80
A.1 Introduction . 80
A.2 Examples of the utilization of containers in NFV . 80
A.3 Integration of the CISM functionality in the NFV framework . 82
History . 84


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6 ETSI GR NFV-REL 011 V4.1.1 (2020-11)
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

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7 ETSI GR NFV-REL 011 V4.1.1 (2020-11)
1 Scope
The present document collects and describes use cases for modifying NFV-MANO software while maintaining service
availability and continuity, irrespective of the technologies being used to deploy this software. As a result, detailed
recommendations for the requirements of the NFV-MANO software modification process are derived.
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-MAN 001 (V1.1.1): "Network Functions Virtualisation (NFV); Management and
Orchestration".
[i.2] ETSI GS NFV-IFA 031 (V3.3.1): "Network Functions Virtualisation (NFV) Release 3;
Management and Orchestration; Requirements and interfaces specification for management of
NFV-MANO".
[i.3] ETSI GS NFV-IFA 009 (V1.1.1): "Network Functions Virtualisation (NFV); Management and
Orchestration; Report on Architectural Options".
[i.4] ETSI GR NFV 003 (V1.5.1): "Network Functions Virtualisation (NFV); Terminology for main
concepts in NFV".
[i.5] ETSI GR NFV-IFA 029 (V3.3.1): "Network Functions Virtualisation (NFV) Release 3;
Architecture; Report on the Enhancements of the NFV architecture towards "Cloud-native" and
"PaaS"".
[i.6] M. Toeroe and F. Tam (Eds.): "Service Availability: Principles and Practice", J. Wiley (2012).
[i.7] ETSI GS NFV-IFA 010 (V3.3.1): "Network Functions Virtualisation (NFV) Release 3;
Management and Orchestration; Functional requirements specification".
[i.8] ETSI GR NFV-REL 007 (V1.1.2): "Network Functions Virtualisation (NFV); Reliability; Report
on the resilience of NFV-MANO critical capabilities".
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8 ETSI GR NFV-REL 011 V4.1.1 (2020-11)
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the terms given in ETSI GR NFV 003 [i.4] and the following apply:
NOTE 1: A term defined in the present document takes precedence over the definition of the same term, if any, in
ETSI GR NFV 003 [i.4].
NOTE 2: In the scope of the present document, for any entity which is part of the NFV architectural framework, the
term "entity" is used.
fallback: recovery procedure of forcefully restoring an entity using a specific restoration point
NOTE 1: A successful fallback allows the entity to continue normal operation.
NOTE 2: A fallback may restore simultaneously more than one entity depending on the content of the restoration
point.
NOTE 3: Depending on the content of the restoration point, the fallback operation does not ensure that the
NFV-MANO
...