ETSI GS NFV-INF 005 V1.1.1 (2014-12)

Network Functions Virtualisation (NFV); Infrastructure; Network Domain

DGS/NFV-INF005

General Information

• Status: Published
• Publication Date: 22-Dec-2014
• Technical Committee: NFV INF - Architecture of the Virtualisation Infrastructure
• Current Stage: 12 - Completion
• Due Date: 19-Jan-2015
• Completion Date: 23-Dec-2014

Standards Content (Sample)

ETSI GS NFV-INF 005 V1.1.1 (2014-12)






GROUP SPECIFICATION
Network Functions Virtualisation (NFV);
Infrastructure;
Network Domain
Disclaimer
This 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 GS NFV-INF 005 V1.1.1 (2014-12)



Reference
DGS/NFV-INF005
Keywords
network, NFV
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3 ETSI GS NFV-INF 005 V1.1.1 (2014-12)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definitions and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 9
4 Domain Overview . 11
5 External Interfaces of the Domain . 15
5.1 [Vn-Nf]/N . 15
5.1.1 Nature of the Interface . 15
5.1.1.1 [Vn-Nf]/N/L2 Service . 16
5.1.1.1.1 [Vn-Nf]/N/L2 Service Definition . 17
5.1.1.1.2 [Vn-Nf]/N/L2 VPN Service . 17
5.1.1.1.3 [Vn-Nf]/N/L2 OAM Protocols . 18
5.1.1.2 [Vn-Nf]/N/L3 Service . 18
5.1.1.2.1 [Vn-Nf]/N/L3 VPN Service . 18
5.1.1.2.2 [Vn-Nf]/N/L3 Infrastructure based virtual networks Service . 18
5.1.1.2.3 [Vn-Nf]/N/L3 OAM Protocols . 19
5.1.2 Specifications in Current Widespread Use . 19
5.1.2.1 MEF Specifications for L2 services . 19
5.1.2.2 IETF Specifications for L3 services . 19
5.2 [NF-Vi]/N . 19
5.2.1 Nature of the Interface . 19
5.3 Ex-Nf . 21
5.3.1 Ex-Nd . 21
5.3.1.1 Nature of the Interface . 21
5.3.1.2 Specifications in Current Widespread Use . 24
5.3.2 Nd-Nd . 26
5.3.2.1 Nature of the Interface . 26
5.3.2.2 Specifications in Current Widespread Use . 26
6 Functional Blocks within the Domain . 26
6.1 Virtual Networks . 26
6.1.1 Infrastructure based Virtual Networks . 26
6.1.2 Layered Virtual Networks . 27
6.2 Virtualisation Layer Options . 27
6.2.1 Virtual O verla ys . 27
6.2.2 Virtual Partitioning . 28
6.2.3 Abstract Layering Model . 28
6.2.4 Examples . 29
6.3 Network Resources. 31
6.4 Control & Admin Agents . 32
6.4.1 Control plane . 32
6.4.1.1 Control Plane Functions . 32
6.4.1.1.1 Topology and device Detection . 32
6.4.1.1.2 Virtual partitioning . 32
6.4.1.1.3 Traffic Isolation . 32
6.4.1.1.4 Reachability . 33
6.4.1.1.5 Traffic Engineering/Path Computation . 33
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4 ETSI GS NFV-INF 005 V1.1.1 (2014-12)
6.4.1.1.6 Flow Management . 33
6.4.1.1.7 Failure detection . 33
6.4.1.1.8 Convergence . 33
6.4.1.1.9 Quality of Service . 34
6.4.1.1.10 Policy . 34
6.4.1.2 Control Plane Approaches . 34
6.4.2 North-South OAM Interface . 34
6.4.3 East-West OAM Interface . 35
6.4.3.1 OAM and the Abstract layering model . 35
6.4.3.2 Layer 2 OAM Protocols . 36
6.4.3.3 Layer 3 OAM Protocols . 36
6.4.3.4 Layer 3 OAM Protocols . 36
7 Interfaces within the Domain . 36
7.1 [Vl-Ha]/Nr . 36
7.1.1 Layer 2 overlay model . 37
7.1.2 Layer 3 models . 38
7.1.3 Specifications in Current Widespread Use . 40
7.1.3.1 Encapsulation Specifications. 40
7.2 Ha/CSr -Ha/Nr . 40
7.2.1 Interface to the NIC . 40
7.2.1.1 Nature of the Interface . 40
8 Modularity and Scalability . 40
8.1 Interworking Strategies . 40
8.1.1 Interworking Using a Gateway . 42
8.1.2 Interworking Using Multi-Protocol Tunnel Terminations . 42
8.1.3 Interworking in the VNFCI . 42
8.2 Operations, Administration and Management Interworking . 43
8.3 Control Plane Interworking . 43
8.4 Data Plane Interworking . 43
9 Features of the Domain Affecting Management and Orchestration . 44
10 Features of the Domain Affecting Performance . 44
10.1 Dynamic Optimization of Packet Flow Routing . 44
11 Features of the Domain Affecting Reliability . 47
12 Features of the Domain Affecting Security . 47
12.1 Threats for Virtual Partitions (VLANs, L2VPN, etc.) . 48
12.2 Threats for Virtual Overlays (VxLAN, NVGRE) . 48
12.3 Threats for Combined Partition/Overlay (PBB, SPBM) . 49
12.4 Security Model for L3 Infrastructure-based Networks . 50
12.4.1 Security Mechanisms in an L3 Infrastructure-based Network . 50
12.4.2 Threat Model in an L3 Infrastructure-based Network . 50
12.5 Security Model for L3 VPN-based Networks . 51
Annex A (informative): Authors & contributors . 52
History . 53

ETSI

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5 ETSI GS NFV-INF 005 V1.1.1 (2014-12)
Intellectual Property Rights
IPRs essential or potentially essential to the present document 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 (http://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.
Foreword
This Group Specification (GS) has been produced by ETSI Industry Specification Group (ISG) Network Functions
Virtualisation (NFV).
Infrastructure Architecture Document Document #
Overview GS NFV INF 001
Illustrative Use Cases for the NFV Infrastructure GS NFV INF 002
Architecture of the Infrastructure Compute Domain GS NFV INF 003
Domains Hypervisor Domain GS NFV INF 004
Infrastructure Network Domain GS NFV INF 005
Architectural Methodology Interfaces and Abstraction GS NFV INF 007
Service Quality Metrics GS NFV INF 010

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "may not", "need", "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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6 ETSI GS NFV-INF 005 V1.1.1 (2014-12)
1 Scope
The present document presents an architectural description of the Infrastructure Network domain of the infrastructure
which supports virtualised network functions. It sets out the scope of the infrastructure domain acknowledging the
potential for overlap between infrastructure domains, and between the infrastructure and the virtualised network
functions. Its also sets out the nature of interfaces needed between infrastructure domains and within the infrastructure
network domain.
The present document does not provide any detailed specification but makes reference to specifications developed by
other bodies and to potential specifications, which, in the opinion of the NFV ISG could be usefully developed by an
appropriate standards developing organisation (SDO).
2 References
2.1 Normative 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.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
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 necessary for the application of the present document.
[1] ETSI GS NFV 003 (V1.1.1): "Network Functions Virtualisation (NFV); Terminology for Main
Concepts in NFV".
[2] ETSI GS NFV 002 (V1.1.1): "Network Functions Virtualisation (NFV); Architectural
Framework".
[3] ETSI GS NFV 001 (V1.1.1): "Network Functions Virtualisation (NFV); Use Cases".
[4] ETSI GS NFV-MAN 001 (V1.1.1): "Network Functions Virtualisation (NFV); Management and
Orchestration".
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-INF 001 (V1.1.1): "Network Functions Virtualisation (NFV); Infrastructure
Overview".
[i.2] ETSI GS NFV-INF 003 (V1.1.1): "Network Functions Virtualisation (NFV); Infrastructure;
Compute Domain".
[i.3] ETSI GS NFV-INF 004 (V1.1.1): "Network Functions Virtualisation (NFV); Infrastructure;
Hypervisor Domain".
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7 ETSI GS NFV-INF 005 V1.1.1 (2014-12)
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[i.4] IEEE Std 802.1Q (2012): "IEEE Standard for Local and metropolitan area networks -- Media
Access Control (MAC) Bridges and Virtual Bridges".
[i.5] MEF 6.1 (2008-04): "MEF Technical Specification; MEF 6.1; Ethernet Services Definitions -
Phase 2".
[i.6] draft-davie-stt-04 (work in progress): "A Stateless Transport Tunneling Protocol for Network
Virtualization (STT)".
[i.7] draft-mahalingam-dutt-dcops-vxlan-06 (work in progress and experimental): "VXLAN: A
Framework for Overlaying Virtualized Layer 2 Networks over Layer 3 Networks".
[i.8] draft-sridharan-virtualization-nvgre-03 (work in progress): "NVGRE: Network Virtualization
using Generic Routing Encapsulation".
[i.9] IETF RFC 2784 (2000-03): "Generic Routing Encapsulation (GRE)".
[i.10] IETF RFC 1702 (1994-10): "Generic Routing Encapsulation over IPv4 networks".
[i.11] IETF RFC 3985 (2005-03): "Pseudo Wire Emulation Edge-to-Edge (PWE3) Architecture".
[i.12] IETF RFC 4448 (2006-04): "Encapsulation Methods for Transport of Ethernet over MPLS
Networks".
[i.13] IETF RFC 4761 (2007-01): "Virtual Private LAN Service (VPLS) Using BGP for Auto-Discovery
and Signaling".
[i.14] IETF RFC 4762 (2007-01): "Virtual Private LAN Service (VPLS) Using Label Distribution
Protocol (LDP) Signaling".
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[i.15] IEEE Std 802.3 (2012): "Ethernet working group".
[i.16] IETF RFC 4364 (2006-02): "BGP/MPLS IP Virtual Private Networks (VPNs)".
[i.17] IETF RFC 2661 (1999-08): "Layer Two Tunneling Protocol "L2TP"".
[i.18] IETF RFC 6439 (2011-11): "Routing Bridges (RBridges): Appointed Forwarders".
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[i.19] IEEE Std 802.1Qbp (2013): "IEEE Standard for Local and metropolitan area networks - Media
Access Control (MAC) Bridges and Virtual Bridged Local Area Networks - Amendment: Equal
Cost Multiple Paths (ECMP)".
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[i.20] IEEE Std 802.1AX (2014): "IEEE Standard for Local and metropolitan area networks -- Link
Aggregation".
[i.21] IETF RFC 6325 (2011-07): "Routing Bridges (RBridges): Base Protocol Specification".
[i.22] IETF RFC 6327 (2011-07): "Routing Bridges (RBridges): Adjacency".
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[i.23] IEEE Std 802.1ag (2007): "IEEE Standard for Local and Metropolitan Area Networks Virtual
Bridged Local Area Networks Amendment 5: Connectivity Fault Management".
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[i.24] IEEE Std 802.1AB (2009): "IEEE Standard for Local and Metropolitan Area Networks --
Station and Media Access Control Connectivity Discovery".
TM
[i.25] IEEE Std 802.1Qbg (2012): "IEEE Standard for Local and metropolitan area networks -- Media
Access Control (MAC) Bridges and Virtual Bridged Local Area Networks -- Amendment 21:
Edge Virtual Bridging".
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[i.26] IEEE Std 802.1Qbb (2011): "IEEE Standard for Local and metropolitan area networks -- Media
Access Control (MAC) Bridges and Virtual Bridged Local Area Networks -- Amendment 17:
Priority-based Flow Control".
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[i.27] IEEE Std 802.1Qaz (2011): "IEEE Standard for Local and metropolitan area networks -- Media
Access Control (MAC) Bridges and Virtual Bridged Local Area Networks -- Amendment 18:
Enhanced Transmission Selection for Bandwidth Sharing Between Traffic Classes".
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8 ETSI GS NFV-INF 005 V1.1.1 (2014-12)
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[i.28] IEEE Std 802.1AX (2008): "IEEE Standard for Local and metropolitan area networks -- Link
Aggregation".
TM
[i.29] IEEE Std 802.1AS (2011): "IEEE Standard for Local and Metropolitan Area Networks - Timing
and Synchronization for Time-Sensitive Applications in Bridged Local Area Networks".
TM
[i.30] IEEE Std 802.1Qau (2010): "IEEE Standard for Local and Metropolitan Area Networks --
Virtual Bridged Local Area Networks -- Amendment 13: Congestion Notification".
[i.31] IETF STD 62 (2002): "STD 62 (RFC 3417) Transport Mappings for the Simple Network
Management Protocol (SNMP)"; "STD 62 (RFC 3416) Version 2 of the Protocol Operations for
the Simple Network Management Protocol (SNMP)"; "STD 62 (RFC 3415) View-based Access
Control Model (VACM) for the Simple Network Management Protocol (SNMP)"; "STD 62 (RFC
3414) User-based Security Model (USM) for version 3 of the Simple Network Management
Protocol (SNMPv3)"; "STD 62 (RFC 3413) Simple Network Management Protocol (SNMP)
Applications"; "STD 62 (RFC 3412) Message Processing and Dispatching for the Simple Network
Management Protocol (SNMP)"; "STD 62 (RFC3411) An Architecture for Describing Simple
Network Management Protocol (SNMP) Management Frameworks".
[i.32] IETF RFC 6241 (2011-06): "Network Configuration Protocol (NETCONF)".
[i.33] IETF RFC 3954 (2004-10): "Cisco Systems NetFlow Services Export Version 9".
[i.34] MEF 17 (2007-04): "MEF Technical Specification; MEF 17; Service OAM Requirements &
Framework - Phase 1".
[i.35] MEF 30.1 (2013-04): "MEF Technical Specification; MEF 30.1; Service OAM Fault Management
Implementation Agreement: Phase 2".
[i.36] MEF.35 (2012-04): "MEF Technical Specification; MEF 35; Service OAM Performance
Monitoring Implementation Agreement".
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[i.37] IEEE Std 802.1BR (2012): "IEEE Standard for Local and metropolitan area networks -- Virtual
Bridged Local Area Networks--Bridge Port Extension".
[i.38] draft-ietf-nvo3-security-requirements-02: "Security Requirements of NVO3".
[i.39] IETF RFC 4031 (2005-04): "Service Requirements for Layer 3 Provider Provisioned Virtual
Private Networks (PPVPNs)".
[i.40] IETF RFC 4110 (2005-07): "A Framework for Layer 3 Provider-Provisioned Virtual Private
Networks (PPVPNs)".
[i.41] IETF RFC 4271 (2006-01): "A Border Gateway Protocol 4 (BGP-4)".
[i.42] IETF RFC 4760 (2007-01): "Multiprotocol Extensions for BGP-4".
[i.43] draft-ietf-l3vpn-end-system-02 (work in progress): "End-system support for BGP-signaled
IP/VPNs".
[i.44] IETF RFC 4664 (2006-09): "Framework for Layer 2 Virtual Private Networks (L2VPNs)".
[i.45] IETF RFC 4665 (2006-09): "Service Requirements for Layer 2 Provider-Provisioned Virtual
Private Networks".
[i.46] draft-ietf-l2vpn-evpn-req-06 (work in progress): "Requirements for Ethernet VPN (EVPN)".
[i.47] draft-ietf-opsawg-oam-overview-16 (work in progress): "An Overview of Operations,
Administration, and Maintenance (OAM) Tools".
[i.48] ETSI GS NFV-SWA 001 (V1.1.1): "Network Functions Virtualisation (NFV); Virtual Network
Function Architecture".
[i.49] IETF RFC 4655 (2006-08): "A Path Computation Element (PCE)-Based Architecture".
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9 ETSI GS NFV-INF 005 V1.1.1 (2014-12)
[i.50] ETSI GS NFV-PER 001 (V1.1.1): "Network Functions Virtualisation (NFV); NFV Performance &
Portability Best Practises".
[i.51] ETSI GS NFV-REL 001 (V1.1.1): "Network Functions Virtualisation (NFV); Resiliency
Requirements".
[i.52] IETF RFC 792 (1981-09): "Internet Control Message Protocol".
[i.53] IETF RFC 4443 (2006-03): "Internet Control Message Protocol (ICMPv6) for the Internet
Protocol Version 6 (IPv6) Specification".
[i.54] IETF RFC 2151 (1997-06): "A Primer On Internet and TCP/IP Tools and Utilities".
[i.55] IETF RFC 5880 (2010-06): "Bidirectional Forwarding Detection (BFD)".
[i.56] IETF RFC 5881 (2010-06): "Bidirectional Forwarding Detection (BFD)for IPv4 and IPv6 (Single
Hop)".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
policy group: grouping of nodes (VNFCI(s), external entities, infrastruc
...