1、 ETSI GS NFV-IFA 003 V2.4.1 (2018-02) Network Functions Virtualisation (NFV) Release 2; Acceleration Technologies; vSwitch Benchmarking and Acceleration Specification Disclaimer The present document has been produced and approved by the Network Functions Virtualisation (NFV) ETSI Industry Specificat
2、ion 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. GROUP SPECIFICATION ETSI ETSI GS NFV-IFA 003 V2.4.1 (2018-02) 2 Reference RGS/NFV-IFA003ed241 Keywords acceleration, benchmarking, NFV, p
3、erformance, requirements, switching, virtualisation ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important no
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8、ion 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. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are trademarks of ETSI registered for the benefit of its Members. 3GPPTM
9、and LTETMare trademarks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members. GSMand the GSM logo are trademarks registered and owned by the GSM Association. ETSI ETSI GS NFV-IFA 003 V2.4.1 (2018-02) 3 Cont
10、ents Intellectual Property Rights 4g3Foreword . 4g3Modal verbs terminology 4g31 Scope 5g32 References 5g32.1 Normative references . 5g32.2 Informative references 5g33 Definitions and abbreviations . 6g33.1 Definitions 6g33.2 Abbreviations . 6g34 Overview 7g34.1 Problem Statement . 7g34.2 vSwitch Use
11、 Cases . 8g34.2.1 Virtual Forwarding . 8g34.2.2 Overlay based Virtual Networks . 8g34.2.3 Traffic Filtering 9g34.2.4 Distributed Network Services . 9g34.2.5 Traffic Monitoring 9g34.2.6 Load Balancing . 10g34.2.7 Latency/Jitter Sensitive Workloads 10g34.2.8 Efficient Policy and QoS Control . 11g34.2.
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13、hes, 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/
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15、t constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Group Specification (GS) has been produced by ETSI Industry Specification Group (ISG) Network Functions Virtualisation (NFV). Modal verbs terminology In the present document “sh
16、all“, “shall not“, “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 use
17、d in direct citation. ETSI ETSI GS NFV-IFA 003 V2.4.1 (2018-02) 5 1 Scope The present document specifies performance benchmarking metrics for virtual switching, with the goal that the metrics will adequately quantify performance gains achieved through virtual switch acceleration conforming to the as
18、sociated requirements specified herein. The acceleration-related requirements will be applicable to common virtual switching functions across usage models such as packet delivery into VNFs, network overlay and tunnel termination, stateful Network Address Translators (NAT), service chaining, load bal
19、ancing and, in general, match-action based policies/flows applied to traffic going to/from the VMs. The present document will also provide deployment scenarios with applicability to multiple vendor implementations and recommendations for follow-on proof of concept activities. 2 References 2.1 Normat
20、ive 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) ap
21、plies. Referenced documents which are not found to be publicly available in the expected location might be found at https:/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 followin
22、g referenced documents are necessary for the application of the present document. 1 ETSI GS NFV 003: “Network Functions Virtualisation (NFV); Terminology for Main Concepts in NFV“. 2 IETF RFC 2544: “Benchmarking Methodology for Network Interconnect Devices“. 3 IETF RFC 7679: “A One-Way Delay Metric
23、for IP Performance Metrics (IPPM)“. 4 IETF RFC 7680: “A One-Way Loss Metric for IP Performance Metrics (IPPM)“. 5 IETF RFC 3511: “Benchmarking Methodology for Firewall Performance“. 6 IETF RFC 4737: “Packet Reordering Metrics“. 7 IETF RFC 5481: “Packet Delay Variation Applicability Statement“. 8 IET
24、F RFC 6703: “Reporting IP Network Performance Metrics: Different Points of View“. 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-sp
25、ecific 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
26、application of the present document but they assist the user with regard to a particular subject area. i.1 IETF draft-ietf-bmwg-ipsec-term-12.txt: “Terminology for Benchmarking IPsec Devices“. i.2 IETF draft-ietf-bmwg-ipsec-meth-05.txt: “Methodology for Benchmarking IPsec Devices“. ETSI ETSI GS NFV-
27、IFA 003 V2.4.1 (2018-02) 6 i.3 IETF draft-ietf-bmwg-virtual-net-01.txt: “Considerations for Benchmarking Virtual Network Functions and Their Infrastructure“. i.4 IETF draft-vsperf-bmwg-vswitch-opnfv-01.txt: “Benchmarking Virtual Switches in OPNFV“. i.5 IETF RFC 6049: “Spatial Composition of Metrics“
28、. i.6 IETF RFC 7348: “Virtual eXtensible Local Area Network (VXLAN): A Framework for Overlaying Virtualized Layer 2 Networks over Layer 3 Networks“. i.7 ETSI GS NFV-INF 007: “Network Functions Virtualisation (NFV); Infrastructure; Methodology to describe Interfaces and Abstractions“. i.8 ETSI GS NFV
29、-IFA 002: “Network Functions Virtualisation (NFV); Acceleration Technologies; VNF Interfaces Specification“. i.9 IETF RFC 6815: “Applicability Statement for RFC 2544: Use on Production Networks Considered Harmful“. i.10 IETF RFC 6985: “IMIX Genome: Specification of Variable Packet Sizes for Addition
30、al Testing“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in ETSI GS NFV 003 1 apply. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ACK ACKnowledge ACPI Advanced Configuratio
31、n and Power Interface ARP Address Resolution Protocol BIOS Basic Input Output System BS Block Storage CPU Central Processing Unit DIMM Dual In-line Memory Module DPDK Data Plane Development Kit DUT Device Under Test GRUB Grand Unified Bootloader HTTP HyperText Transfer Protocol IMIX Internet MIX IO
32、Input OutputIP Internet Protocol MAC Media Access Control MTU Maximum Transmission Unit NAT Network Address Translation NFP Network Forwarding Path NFV Network Functions Virtualisation NFVI NFV Infrastructure NIC Network Interface Card NUMA Non Uniform Memory Access OPNFV Open Platform for NFV PCI P
33、eripheral Component Interconnect PDV Packet Delay Variation RSS Receive Side Scaling SF Service Function SFC Service Function Chaining ETSI ETSI GS NFV-IFA 003 V2.4.1 (2018-02) 7 SFF Service Function Forwarders SLA Service Level Agreement SUT System Under Test SW SoftWare TCP Transmission Control Pr
34、otocol TSO TCP Segment Offload VBS Virtual Block Storage VIM Virtual Infrastructure Manager VM Virtual Machine VNF Virtualised Network Function VNFC Virtual Network Function Component VNFD Virtual Network Function Description VNFFG VNF Forwarding Graph VNI VxLAN Network Identifier VSPERF OPNFV vSwit
35、ch Performance Project VXLAN Virtual eXtensible Local Area Network 4 Overview 4.1 Problem Statement Inside a compute platform, a virtual switch (vSwitch) is used to interconnect VNFs that share the same platform. The vSwitch is in a unique position of being at the intersection of the network and the
36、 VNFs themselves. As such the implementation and specifics of the virtual switching on the platform need to be transparent to the VNFs in the system, thus as opposed to ETSI GS NFV-IFA 002 i.8 where VNFs are requesting acceleration, vSwitch acceleration needs to be transparent to individual VNFs, an
37、d controlled from the VIM. NOTE: In the context of the present document, vSwitch may include some of the functionality of vRouter as defined in ETSI GS NFV-INF 007 i.7. A flow within the vSwitch is given as the classification (locator + domain) and the port forwarding action. This definition of flow
38、 differs from what is tracked as a flow within a VNF or even within the VIM. In this context the vSwitch is only concerned with the flow information needed to perform the virtual switching functionality. Since the vSwitch finds itself in this unique position between the rest of the network and the V
39、NFs, it is very common to add additional functionality at this point of control. In the present document, these are called in-line functions, and are defined as network services that have been placed in-line with the switching function. Examples of in-line functions include: ACLs: Doing a more compl
40、ex (usually wildcard based) classification for security and monitoring purposes. Tunnel Endpoint: Pushing packets in and out of a tunnel in order to traverse a physical network. Address Translation/NAT: Translating packet headers to expand the address space of the network. Load Balancing: Choosing f
41、rom a set of destinations to forward a packet. QoS: assigning a class of service for the purpose of traffic shaping, rate limiting, priority queuing, mapping of per-packet features of VNF to infrastructure. These in-line functions are logically separate from the baseline virtual switching function,
42、and as such may have their own specific definition of what constitutes a flow, and what additional classification and state information is tracked. In addition to above in-line functions, stateful operations such as Firewall or Load Balancer may be implemented. In contrast to in-line functions, netw
43、ork functions could also sit within a VNF, in which case a vSwitch may choose to classify the packet and switch it to this VNF. In order to provide service-to-service context and to preserve the initial classification of the packet, service chaining may be used to position more complicated functions
44、 inside or outside of a VNF. ETSI ETSI GS NFV-IFA 003 V2.4.1 (2018-02) 8 The present document defines the critical aspects of vSwitch performance by treating the vSwitch as a Device Under Test (DUT), with specific configurations that are consistent across instantiations of a vSwitch on a compute pla
45、tform. Existing testing and benchmarks specifications (see i.1, i.2, i.3 and i.4) should be used to measure the performance of the DUT under these configurations and conditions, including measurement of metrics that support service engineering (such as the Composition Functions defined in IETF RFC 6
46、049 i.5). The following configurations are of importance (see clause 7 for more detail and diagrams): vSwitch Physical to Physical: A vSwitch configured to receive traffic from a physical interface (uplink), make a forwarding decision, and re-forward the frame back out a physical interface (uplink).
47、 vSwitch Virtual to Virtual: A vSwitch configured to receive traffic from a VNF, make a forwarding decision, and re-forward the frame back out to a VNF. vSwitch VNF Loopback: A vSwitch is configured to receive traffic from a physical interface (uplink), make a forwarding decision, and then forward t
48、he frame to a VNF. The VNF should simply loopback the frames back to the vSwitch, which should do another forwarding decision to push the frame back out a physical interface (VNF). In each configuration, the vSwitch may have a specific set of in-line functions configured such as L2 forwarding rules,
49、 L3 forwarding rules, tunnel termination, and wildcard rules used for ACLs, QoS, and monitoring. These in-line functions define the use case under test. 4.2 vSwitch Use Cases 4.2.1 Virtual Forwarding The function of a vSwitch is minimally defined as a classification based on a locator (derived from the packet header) and a domain, both of which are matched upon to deliver the packet to a destination. The domain is derived either from the packet header (for example a VXLAN, or VNI) or from the ingress por
