ETSI GS NFV-IFA 018-2017 Network Functions Virtualisation (NFV) Acceleration Technologies Network Acceleration Interface Specification (V3 1 1 Release 3).pdf

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1、 ETSI GS NFV-IFA 018 V3.1.1 (2017-07) Network Functions Virtualisation (NFV); Acceleration Technologies; Network Acceleration Interface Specification; Release 3 Disclaimer The present document has been produced and approved by the Network Functions Virtualisation (NFV) ETSI Industry Specification Gr

2、oup (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 018 V3.1.1 (2017-07) 2 Reference DGS/NFV-IFA018 Keywords acceleration, interface, network, NFV ETSI 65

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8、 of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. ETSI 2017. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit

9、 of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI GS NFV-IFA 018 V3.1.1 (2017-07) 3 Contents Intellectual Property Rights 6g3Foreword . 6g3Modal

10、verbs terminology 6g31 Scope 7g32 References 7g32.1 Normative references . 7g32.2 Informative references 7g33 Definitions and abbreviations . 8g33.1 Definitions 8g33.2 Abbreviations . 8g34 Overview of Network Acceleration Interface 8g34.1 Introduction 8g34.2 Fall back and failover mechanism 9g34.3 M

11、echanisms for the network acceleration interface . 10g35 VNF exposed Interfaces . 10g36 Dedicated switch exposed interfaces 10g36.1 Introduction 10g36.2 Forwarding Table Configuration interfaces. 10g36.2.1 Description 10g36.2.2 Add Entry operation 11g36.2.2.1 Description 11g36.2.2.2 Input parameters

12、 11g36.2.2.3 Output parameters . 11g36.2.2.4 Operation results . 11g36.2.3 Query Entry operation 11g36.2.3.1 Description 11g36.2.3.2 Input parameters 12g36.2.3.3 Output parameters . 12g36.2.3.4 Operation results . 12g36.2.4 Update Entry operation . 12g36.2.4.1 Description 12g36.2.4.2 Input parameter

13、s 12g36.2.4.3 Output parameters . 13g36.2.4.4 Operation results . 13g36.2.5 Delete Entry operation 13g36.2.5.1 Description 13g36.2.5.2 Input parameters 13g36.2.5.3 Output parameters . 14g36.2.5.4 Operation results . 14g36.3 Performance Monitoring interface . 14g36.3.1 Description 14g36.3.2 Subscribe

14、 operation. 14g36.3.2.1 Description 14g36.3.2.2 Input parameters 15g36.3.2.3 Output parameters . 15g36.3.2.4 Operation results . 15g36.3.3 Terminate Subscription operation . 15g36.3.3.1 Description 15g36.3.3.2 Input parameters 15g36.3.3.3 Output parameters . 16g36.3.3.4 Operation results . 16g36.3.4

15、 Notify operation 16g36.3.4.1 Description 16g3ETSI ETSI GS NFV-IFA 018 V3.1.1 (2017-07) 4 6.3.5 Create Performance Monitoring Task operation . 16g36.3.5.1 Description 16g36.3.5.2 Input parameters 16g36.3.5.3 Output parameters . 17g36.3.5.4 Operation results . 17g36.3.6 Query Performance Monitoring T

16、ask operation . 17g36.3.6.1 Description 17g36.3.6.2 Input parameters 18g36.3.6.3 Output parameters . 18g36.3.6.4 Operation results . 18g36.3.7 Delete Performance Monitoring Task operation . 18g36.3.7.1 Description 18g36.3.7.2 Input parameters 18g36.3.7.3 Output parameters . 19g36.3.7.4 Operation res

17、ults . 19g36.3.8 Create Threshold operation . 19g36.3.8.1 Description 19g36.3.8.2 Input parameters 19g36.3.8.3 Output parameters . 20g36.3.8.4 Operation results . 20g36.3.9 Query Threshold operation . 20g36.3.9.1 Description 20g36.3.9.2 Input parameters 20g36.3.9.3 Output parameters . 21g36.3.9.4 Op

18、eration results . 21g36.3.10 Delete Threshold operation . 21g36.3.10.1 Description 21g36.3.10.2 Input parameters 21g36.3.10.3 Output parameters . 21g36.3.10.4 Operation results . 22g36.4 Unmatched Packets Forward Notification interface . 22g36.4.1 Description 22g36.4.2 Subscribe operation. 22g36.4.2

19、.1 Description 22g36.4.2.2 Input parameters 22g36.4.2.3 Output parameters . 23g36.4.2.4 Operation results . 23g36.4.3 Terminate Subscription operation . 23g36.4.3.1 Description 23g36.4.3.2 Input parameters 23g36.4.3.3 Output parameters . 23g36.4.3.4 Operation results . 24g36.4.4 Notify operation 24g

20、36.4.4.1 Description 24g37 Information elements exchanged 24g37.1 Introduction 24g37.2 Information elements related to Forwarding Table 24g37.2.1 EntryInformation information element . 24g37.2.1.1 Description 24g37.2.1.2 Attributes . 25g37.2.2 EntryAction information element . 25g37.2.2.1 Descriptio

21、n 25g37.2.2.2 Attributes . 25g37.2.3 EntryAttribute information element 26g37.2.3.1 Description 26g37.2.3.2 Attributes . 26g37.2.4 EntryPerformance information element 26g37.2.4.1 Description 26g37.2.4.2 Attributes . 26g37.2.5 EntryPerformanceValueEntry information element . 26g37.2.5.1 Description

22、26g3ETSI ETSI GS NFV-IFA 018 V3.1.1 (2017-07) 5 7.2.5.2 Attributes . 26g37.3 Information elements and notifications related to VNF Performance Management 27g37.3.1 PrInfo information element . 27g37.3.1.1 Description 27g37.3.1.2 Attributes . 27g37.3.2 Threshold information element . 27g37.3.2.1 Desc

23、ription 27g37.3.2.2 Attributes . 28g37.3.3 ThresholdCrossedNotification 28g37.3.3.1 Description 28g37.3.3.2 Trigger Condition 28g37.3.3.3 Attributes . 28g37.4 Information elements and notifications related to Unmatched Packets Forward . 29g37.4.1 UnmatchedPacketForwardNotification . 29g37.4.1.1 Desc

24、ription 29g37.4.1.2 Trigger Condition 29g37.4.1.3 Attributes . 29g3Annex A (informative): Authors 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.et

25、si.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 t

26、he 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 tradema

27、rk 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 Specification (GS) has been produced by ETSI Industry Specification Group (ISG) Network Fun

28、ctions Virtualisation (NFV). Modal verbs terminology In the present document “shall“, “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 provisi

29、ons). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI GS NFV-IFA 018 V3.1.1 (2017-07) 7 1 Scope The present document specifies the network acceleration related interfaces supported over the Vn-Nf reference point of the NFV architectural frame

30、work i.2 between a VNF and a dedicated switch controlled by that VNF. The present document also defines information elements exchanged over those interfaces. The present document is built on the use of the Dynamic Optimization of Packet Flow Routing (DOPFR) mechanism (see use case described in ETSI

31、GS NFV-IFA 001 i.2). Based on DOPFR, the present document aims to design a common interface allowing a Network Intensive VNF (NI-VNF) to accelerate its data plane processing on a dedicated switch. 2 References 2.1 Normative references References are either specific (identified by date of publication

32、 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

33、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 following referenced documents are necessary for the application of the present document

34、. 1 ETSI GS NFV-IFA 002: “Network Functions Virtualisation (NFV); Acceleration Technologies; VNF Interfaces Specification“. 2 ETSI GS NFV-IFA 019: “Network Functions Virtualisation (NFV) Release3; Acceleration Technologies; Acceleration Resource Management Interface Specification“. 2.2 Informative r

35、eferences 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

36、. 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 ar

37、ea. i.1 ETSI GS NFV 003: “Network Functions Virtualisation (NFV); Terminology for main concepts in NFV“. i.2 ETSI GS NFV-IFA 001: “Network Functions Virtualisation (NFV); Acceleration Technologies; Report on Acceleration Technologies Management and Orchestration; VNF Packaging Specification“. i.4 ET

38、SI GS NFV 004: “Network Functions Virtualisation (NFV); Virtualisation Requirements“. ETSI ETSI GS NFV-IFA 018 V3.1.1 (2017-07) 8 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in ETSI GS NFV 003 i.1, ETSI GS NFV-IFA 002 1 an

39、d the following apply: dedicated switch: infrastructure logical switching element which is allocated to one VNF and is controlled by this VNF NOTE: A dedicated switch can be a physical switch, a virtual switch or a switching accelerator (e.g. eSwitch embedded on a network interface card) or a partit

40、ion of these elements or of a combination of them. network acceleration interface: abstract interface used by a virtualised network function for the control and management of a switch dedicated for the acceleration purpose network intensive VNF: VNF required to process a large number of packets and

41、bytes per second NOTE: Network intensive VNFs normally involve some static and relatively small CPU code, while their data plane functionalities are dynamic, such as NAT, L2/L3 forwarding and tunnelling technologies, like VxLAN. 3.2 Abbreviations For the purposes of the present document, the abbrevi

42、ations given in ETSI GS NFV 003 1 and the following apply: NOTE: An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in ETSI GS NFV 003 i.1. API Application Programming Interface UML Unified Modelling Language 4 Overview of Network A

43、cceleration Interface 4.1 Introduction While a range of VNFs may work efficiently as software-only entities, some VNFs may require some form of acceleration to be provided by the NFVI to meet their performance goals. Some VNFs, referred as network-intensive VNFs (NI-VNFs) in the present document, ne

44、ed to process a large number of packets and bytes per second. They normally involve some static and relatively small CPU code, while their data plane functionalities are dynamic, such as NAT. To improve the packet processing performance of a NI-VNF while decreasing the usage of server resources, the

45、 use of the Dynamic Optimization of Packet Flow Routing (DOPFR) acceleration mechanism i.2 is recommended. With DOPFR, a NI-VNF can offload its data plane traffic to a dedicated switch in the infrastructure network while keeping its control plane being handled by the NI-VNF. It requires the NI-VNF t

46、o instruct the dedicated switch to stop forwarding the data flow to the NI-VNF and to process it directly. The data plane functionalities that can be performed by the dedicated switch include: L2/L3 forwarding Source IP/Destination IP/Source Port/Destination Port translation TCP sequence number adap

47、tation VLAN/VXLAN/NVGRE tunnelling ETSI ETSI GS NFV-IFA 018 V3.1.1 (2017-07) 9 As described in ETSI GS NFV-IFA 001 i.2, the dedicated switch allocated to a NI-VNF is controlled by the NI-VNF itself via one control interface, which allows the NI-VNF to instruct the dedicated switch to process the tra

48、ffic directly (fast path). Likewise, it allows the NI-VNF to retrieve the traffic from the dedicated switch (normal path). The present document refers to this control interface as the network acceleration interface (see the dashed line in figure 4.1-1). Figure 4.1-1: Network Acceleration Interface T

49、he network acceleration interface is an abstract interface used by the NI-VNF to control/configure the dedicated switch for acceleration purposes. The dedicated switch can use this interface to report the OAM information back to the NI-VNF on the reverse direction. 4.2 Fall back and failover mechanism ETSI GS NFV 004 i.4 identifies virtualisation requirements in the areas of resiliency, service continuity and service assurance. These requirements imply that necessary fall-back and failover mechanisms be provided allowing a VNF instance to b