NFV Quality Management Framework Proposal
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1 NFV Quality Management Framework Proposal Eric Bauer May 11 th
2 Summary ETSI is driving standards for network function virtualization (NFV), including Network Function Virtualization Quality Metrics (published in December 14) TM Forum is driving standards for management, including GB917 Management Handbook, Volume 2, Concepts and Principles and TR178 Enabling End-to-End Cloud Management QuEST Forum drives TL 9000 Measurements Handbook defining objective and quantitative measurements (e.g., outages) for quality management of telecom networks and equipment NFV Strategic Initiative was chartered by QuEST Forum s Executive Board, and that group is now working a draft NFV Quality Management Framework which enables objective and quantitative prediction, control and quality improvement of NFV-based services and applications - This presentation covers the 4/29/15 review draft of that Framework 2
3 QuEST Forum Executive Board NFV Strategic Initiative Team 3
4 The Network Function Virtualization Vision Today. Tomorrow a.k.a., cloud-based applications, or virtualized network functions (VNFs) VNF Organization Figure from ETSI NFV Whitepaper 4 NFV Infrastructure Organization
5 Fundamental Changes due to NFV 1. Decoupling Software from Hardware 2. Shared compute, memory, storage and networking infrastructure 3. Automated Resource and Application Lifecycle Management 4. Automated Network Lifecycle Management 5. Dynamic Operation 6. Increasingly Complex Multivendor Environment Today. PNF 1 PNF 2 SW OS SW OS HW HW Tomorrow VNF 1 VNF 2 SW SW OS OS NFV Infrastructure NFV MANO 5 Traditional Network Function Deployment Virtual Network Function Deployment
6 Objectives of the NFV Quality Measurement Framework NFV quality measurements should be 1. Quantitative and Objective 2. Future proof 3. Recognize Different Resource Quality Expectations 4. Recognize Different Application and Architectures 5. Support Leading Quality Indicators 6. Enable Side-by-Side Physical and Virtual Quality Comparisons 7. Principle of Simplicity (Parsimony) 6
7 Sample Motivational Scenario 1. One organization offers VoLTE on NFV infrastructure shared by other tenants (e.g., EPC, IP-TV, enterprise communications) 2. VoLTE provider buys best-in-breed VNFs from several suppliers 3. VoLTE provider and partners write the policies and descriptors that configure and chain VNFs 5. NFV Infrastructure service provider s systems from other suppliers automatically apply policies and descriptors to configure and operate VoLTE provider s (and other tenants ) service. 4. NFV Infrastructure service provider buys COTS servers, storage and switches from several equipment suppliers 7 How does one rapidly localize, drive root cause analysis and decide on corrective actions in this shared, decoupled, flexible, dynamic and multi-vendor environment? Underlay figure from Network Functions Virtualization (NFV); Architectural Framework, GS NFV 002 V1.2.1 ( )
8 End-to-End Quality Management Framework (TR178 Style View) Primary functionality of VNF drives TL product category assignment Cloud User Cloud (CSC) VNF VNF From Cloud Developers (a.k.a., VNF Suppliers) VNF 1 VNF N CSP: Network Application Network Integrator Func.Comp. as-a-service MANO NFVI Cloud (CSP): NFV Infrastructure, Management & Orchestration, Functional Component as-a- 8 Virtual Machine and Virtual Networking s Automated Lifecycle Management and Orchestration s Functional Component (Entity as-a-
9 NFV Quality Management Framework NFV Quality Measurement Cloud Framework enables objective User and quantitative quality measurements across NFV reference points CSP: Network Application to support end-to-end quality and management Network Cloud (CSC) Integrator VNF-1 VNF-N FCaaS MANO INFRA From Cloud Developers (a.k.a., VNF Suppliers) VNF 1 VNF N Cloud (CSP): NFV Infrastructure, Management & Orchestration, Functional Component as-a- 9
10 Outage Metrics in NFV Quality Measurement Framework (User) Impact Outages (SO) Cloud User CSP: Network User Network Cloud (CSC) Integrator VNF-1 VNF-N FCaaS MANO INFRA From Cloud Developers (a.k.a., VNF Suppliers) VNF 1 Primarily Impact Outage (SO) VNF N Likely to be Impact Outage (SO) ([NFV_SQM] TcaaS outage) Cloud (CSP): NFV Infrastructure, Management & Orchestration, Functional Component as-a- (Primarily) Network Element Impact Outages (SONE) 10
11 Transaction Metrics in NFV Quality Measurement Framework Cloud User CSP: Network User Network Cloud (CSC) Integrator VNF-1 VNF-N FCaaS MANO INFRA From Cloud Developers (a.k.a., VNF Suppliers) Functional-Component- (Entity) as-a- VNF 1 Reliability and Latency VNF N Lifecycle Management Action Reliability and Latency Cloud (CSP): NFV Infrastructure, Management & Orchestration, Functional Component as-a- Fault Notification Accuracy (Reliability) and Timeliness (Latency) Virtual Machine and Virtual Network Reliability and Latency 11
12 Transaction Quality Model Input Event Processing Output Lifecycle Management Request Failure Event Non-instantaneous processing action Correct Response Incorrect Response Unacceptably Late Response Operation Reliability is the ratio of correct responses to the sum of correct, incorrect, unacceptably late and no response events Latency Operation Latency is the elapsed time between the triggering event and the corresponding correct or incorrect response No Response Incorrect Response DPM + Unacceptably Late DPM + Non-Response DPM = Operation Reliability DPM DPM = defective operations per million requests 12
13 Measure Operational Quality (Reliability and Latency) Across Standard NFV Reference Points Examples: Network Lifecycle Management (7.1.2) Network Fault Management (7.1.5) VNF Lifecycle Management (7.2.4) Virtualized Resources Management (7.3.3) Virtualized Resources Fault Management (7.3.5) VNF Fault Management (7.2.8) 13 Virtual Machine and Virtual Networking Reliability and Latency Section numbers in callouts (e.g., 7.1.2) are from Network Functions Virtualization (NFV); Management and Orchestration, GS NFV-MAN 001 V1.1.1 ( ) document
14 Proposed Lifecycle Management Errors [TL_9000] Procedural Error (Proposed) Lifecycle Management Error Example of Elevated VNF Risk due to Lifecycle Management Error An error that is the direct result of human intervention or error. An error that is the direct result of policy, management, or orchestration. Contributing factors can include but are not limited to Failing to continuously enforce anti-affinity placement rules for VNFCs a) deviations from accepted practices or documentation, can lead to both primary and protecting VNFC instances appearing in a single NFV infrastructure failure group b) inadequate training, not generally applicable c) unclear, incorrect, or out-of-date documentation, faulty or out of date: automation scripts; service, VNF or resource descriptors; etc Proper execution of faulty or out of date scripts can produce faulty and higher risk (e.g., simplex) VNF configurations d) inadequate or unclear displays, messages, or signals, inadequate, insufficient or stale FCAPS input data Inadequate, insufficient or stale performance information can produce faulty elastic capacity management decisions e) inadequate or unclear hardware labeling, not generally applicable f) miscommunication, not generally applicable g) non-standard configurations, Configuring non-standard third party software to monitor, manage, backup or control a VNF instance. h) insufficient supervision or control Failing to diligently monitor alarms and correct unsuccessful VNF repair actions can leave impacted VNF simplex exposed i) user characteristics such as mental faulty execution of policy by a management Faulty execution of automation scripts can produce faulty and higher attention, physical health, physical fatigue, mental health, and substance abuse. or orchestration element risk (e.g., simplex) VNF configurations 14 tardy execution of lifecycle management action risky operational policies Insufficient automated management and orchestration capacity or other causes result in late execution of VNF repair, capacity change or other lifecycle management action, thereby prolonging service risk to target VNF. Failing to maintain sufficient spare application capacity online can yield poor user service quality when unforecast surges in offered workload occur during capacity change lead time intervals Standardizing definition of lifecycle management errors enables richer conversations about roles, responsibilities and accountabilities before outages occur
15 Outlook 4/29/15 draft of NFV Quality Management Framework will be reviewed on 5/21/15 at QuEST Forum meeting; goal is to baseline this non-normative document 3Q15 ETSI NFV work item in support of NFV Quality Management Framework will be considered later this month QuEST Forum will continue to work with TM Forum, ETSI NFV, NIST and appropriate other SDOs to enable standardized, objective and quantitative metrics to facilitate rapid and accurate fault localization, root cause analysis, and end-to-end management 15
16 Questions? 16
17 17
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