Delivering Ethernet Services With Dynamic QoS & Robust SLAs. A Light Reading Webinar Sponsored by

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1 Delivering Ethernet Services With Dynamic QoS & Robust SLAs A Light Reading Webinar Sponsored by

2 Today s Presenters Moderator Stan Hubbard Senior Analyst, Heavy Reading Speakers Eitan Schwartz VP Pseudowire & Ethernet Access, RAD Data Communications Ganesh Nakhawa Product Line Manager, EXFO Service Assurance

3 Topics Why carriers need dynamic QoS & CoS Building networks that guarantee QoS & CoS Bandwidth control / traffic prioritization / traffic management OAM standards & service management SLA assurance & service life cycle Service turn-up & burn-in Performance monitoring Examples: Retail, Mobile and Wholesale Upgrading legacy Ethernet Networks

4 Why Do Carriers Need Dynamic QoS & CoS? For Competitive Differentiation Ethernet business & wholesale services competition is intensifying worldwide More providers are offering Ethernet connectivity services Broadening their portfolios Expanding into more metro markets. Increasing coverage within (and overlapping in) metro markets But approaches vary widely on QoS/CoS with end-toend SLAs and providing customers visibility on service performance Survey data shows many carrier professionals believe it is very important to deploy platforms with hierarchical / dynamic QoS capabilities

5 Why Do Carriers Need Dynamic QoS & CoS? Examples of QoS/CoS Tier 2 US Regional Operator EVPL Gold (Real-Time) Silver (Interactive) Best Effort (Best Effort) Network Availability % % Not Applicable Latency (two-way) 10 ms or less 20 ms or less Not Applicable Jitter 1 ms or less Not Applicable Not Applicable Packet Delivery % % Not Applicable Mean Time To Repair 4 hours or less 4 hours or less Not Applicable Global Operator - EVPL Network Availability Real-Time Priority Basic 100% on-net; 99.9% off-net Latency (two-way) 100 ms Unspecified Unspecified Jitter 5 ms Unspecified Unspecified Packet Delivery 99.99% 99.99% 99.99% Mean Time To Repair 2 hours on-net, 4 hours off-net

6 Why Carrier Ethernet needs dynamic QoS? Carrier Ethernet s demarcation point connects different network infrastructure Widespread VoIP deployments infrastructure with QoS limitation Video, voice & data applications are sensitive to delay and traffic loss Supports multiple services with their own unique QoS CIR, PIR, Burst Priority, Queue Size Per-flow queuing Sophisticated congestion handling CIR maintained under any state of network congestion no traffic loss PIR fulfilled after servicing all CIR by Burst Priority Connection Admission Control (CAC) UNI CE Carrier Ethernet Network E-Line Service type Point-to-Point EVC Carrier Ethernet Network E-LAN Service type CE UNI UNI Multipoint-to-Multipoint EVC UNI CE CE MEF certified Carrier Ethernet products UNI: User Network Interface, CE: Customer Equipment 2011 EXFO Inc. All rights reserved. 5

7 QoS/CoS and Traffic Management Traffic Management is the control of network traffic to optimize or guarantee performance. It includes: Traffic Classification Metering and policing Hierarchical scheduling - Per EVC shaping Packet Editing and Marking Traffic Management conforms traffic to a BW profile. It helps: Ensure higher priority traffic will be served first Increase usable bandwidth by delaying non real-time packets. scheduling fairness and better network load distribution 2011 RAD Inc. All rights reserved. Slide 6

8 QoS/CoS and Traffic Management Classification Criteria: 1.VLAN 2.P bit 3.DSCP 4.IP address 5.MAC address 6.UDP ports 7.EtherType 8.Combinations of the above Flow: Video Flow: Data Flow: Voice Flow: Mgt. Flow: Clock CIR/EIR Policing CIR/EIR Policing CIR/EIR Policing CIR/EIR Policing CIR/EIR Policing SP, WFQ, WRED SP, WFQ, WRED Per EVC Shaping Per EVC Shaping WFQ EVC1 EVC2 EVCn Traffic Classified by type into flows Flows mapped to Queue blocks 8 CoS each Flows policed to CIR/EIR according to bandwidth profiles Prioritize flows within Queue blocks and avoid congestion Smooth out bursts and avoid buffer overruns Fair distribution of bandwidth among traffic classes and users Traffic classification and policing 1. Wholesalers limiting BW to contract 2. Mobile operator filtering traffic on X2 interface to protect against traffic flooding. Hierarchical scheduling and shaping 1.Retail carriers intelligently oversubscribing off-net facilities 2.Mobile operators prioritizing and shaping traffic to wholesale BW pipe including dynamic compensation for overhead 2011 RAD Inc. All rights reserved. Slide 7

9 Traffic Management Bandwidth Control and Prioritization Going beyond ATM and FR Defining Multi CoS EVC Defining bandwidth profile per flow (CoS) Intelligent over subscription Per flow (CoS) granularity Better utilization of network resources allows for increase revenue 2011 RAD Inc. All rights reserved. Slide 8

10 Typical NTU Traffic Management (Shaper per Port) Line rate EVC #1 to Branch 1 BW 50Mbps 15Mbps CIR+5 EIR Shaper EVC#1 50Mbps 15Mbps CIR+5 EIR EVC #1 Occasionally traffic will decrease Time 20Mbps CIR+20 EIR Traffic is shaped to 50Mbps For each EVC EVC #2 to Branch 2 BW 50Mbps 15Mbps CIR+5 EIR 15Mbps CIR+5 EIR 20Mbps CIR+20 EIR 100Mbps Service provider can t control BW on Line a per rate EVC basis 100Mbps EVC#2 50Mbps EVC #2 utilizes spare shaper capacity and BW exceeds the max allowed limit Time 2011 RAD Inc. All rights reserved. Slide 9

11 Advanced Traffic Management (Shaper per EVC) Line rate EVC #1 to Branch 1 BW 50Mbps 15Mbps CIR+5 EIR Shaper EVC#1 50Mbps 15Mbps CIR+5 EIR 50Mbps EVC #1 Occasionally traffic will decrease Time 20Mbps CIR+20 EIR EVC #2 to Branch 2 BW 50Mbps 15Mbps CIR+5 EIR Service Provider controls Shaper BW per EVC/EVC.Cos Traffic is shaped to 50Mbps For each EVC by the T.M Line rate 100Mbps 15Mbps CIR+5 EIR 50Mbps EVC#2 50Mbps 20Mbps CIR+20 EIR EVC #2 BW controlled independently by the T.M never exceeds MAX allowed Time 2011 RAD Inc. All rights reserved. Slide 10

12 Relevant OAM Standards MEF IEEE ITU-T MEF 6.1, 10.1 Ethernet Service Definitions and Attributes IEEE 802.1ag Configuration and Fault Management OAM Y.1731 OAM Functions and Mechanisms MEF 26 External Network to Network Interface Service OAM for Fault and Performance Management IEEE 802.1Qaw Data Dependant CFM Y.156SAM New standard for Ethernet Service Testing Methodology G.8021 Ethernet Equipment Functional Blocks 2011 EXFO Inc. All rights reserved. 11

13 Robust Service Management Ethernet OAM Summary of available Ethernet OAM mechanisms OAM Technology IEEE (formerly 802.3ah) End-End/Last Segment Performance Monitoring Type Fault Propagation Single Segment No Link No IEEE 802.1ag End-to-End No Connectivity No ITU-T Y.1731 End-to-End Yes Service Yes Carrier Ethernet Analyst Presentation 2010 Slide 12

14 The Challenge The emergence of next-generation Ethernet Services has increased the need for end-to-end monitoring of quality of Service (QoS) dynamically and provide robust service level agreements (SLAs) 2011 EXFO Inc. All rights reserved. 13

15 EXFO Service Assurance Solution Many Service Providers use tailored class of service offerings and evolved SLAs to differentiate in their Carrier Ethernet Services QoS (Quality of Service): To provide different priority to different users, data flows, or certain application program QoE (Quality of Expertise): To measure from the user s perspective of the overall value of the service provided Using Carrier Ethernet standards throughout the network lifecycle enables the successful delivery and maintenance of these differentiated services Prove service conformance 24/7 SLA monitoring While minimizing operational costs Providing value-added data on network trends Turn-up and Burn-in Monitoring Troubleshooting Leveraging Standards across service lifecycle to offer differentiated services Ethernet Network Life Cycle 2011 EXFO Inc. All rights reserved. 14

16 Ethernet Service SLA Example Performance Attribute Real Time High Priority Data Best Effort Data (Internet Access) CIR (Mbps) (Green Traffic) EIR (Mbps) (Yellow Traffic) Frame Delay (ms) < <30 Frame Delay Variation (ms) <1 n/a n/a Frame Loss (%) <0.001 <0.05 <0.05 VLAN Mbps This is what needs to be validated when the service is turned-up 2011 EXFO Inc. All rights reserved. 15

17 Ethernet Services Customer Site A Customer Site B Metro Ethernet Network / PTN End-to-end Service with SLA: Traffic shaping configured in network equipment according to SLA (Rate limitation, queuing) Decision made on frame configuration: VLAN, ToS/DiffServ, port Customer Traffic 2011 EXFO Inc. All rights reserved. 16

18 Service Turn-Up AXS-200/850 PBV-10 RFC 2544, Loopback, Throughput, Go/No Turn-Up Data to BrixWorx BrixWorx RTU-310 Carrier Ethernet Verify installation, provisioning, and performance of backhaul connection with line-rate test traffic Performed by executing RFC2544 or EtherSAM test Option 1: Technician initiated test from Access provider to Central Office. Option 2: NOC initiated test to Access Provider Validate end-to-end QoS for Service Level Agreements (SLA) Test results can be stored in BrixWorx for Birth Certificate creation Results archived for historical trouble-shooting comparison/baselining Benefits: NID Access Provider Single personnel operation for turn-up multi-site tests & improve speed of testing Provide documentation to inspire customer confidence and traceability NOC Provide a consistent procedure to get the service running quickly and efficiently 2011 EXFO Inc. All rights reserved. 17

19 Service Turn-up Y.156sam Key Service Provider Challenges at Turn-up Prove SLA conformance Time constraints: having service up and running as fast as possible Minimize OPEX ITU-T Y.156sam (EtherSAM) Ethernet Services turn-up and Troubleshooting Network Configuration Test Key Y.156sam advantages Completely adapted to today s Ethernet Services Supports different QoS levels Validates all SLA parameters and attributes ( CIR, EIR, CBS, EBS Throughput, FD, FDV, FLR At least 8x faster than traditional methodology (RFC2544) 91.5% better test coverage* than traditional methodology (RFC2544) One-way measurements provide the highest level of confidence Validation of SLA parameters on multiple QoS levels Throughput Latency Frame Loss Jitter, OOS Highest Priority High Priority Best Effort Services Test *based on Ethernet Service with 4 QoS levels 2011 EXFO Inc. All rights reserved. 18

20 Service Burn-in Data to BrixWorx BV-10 Performance metrics via 802.1ag/Y.1731 Verifier (BV) test to CRS or NID BV 3000 BrixWorx SLA provisioned/reported via BrixWorx NID Access Provider CESR Perform the service burn-in for 24 to 72 hours before the Cell is turned-up Understand how the service performs over a period of time (over hrs) rather than a single point during the day of turn-up KPIs to be monitored - (frame loss, frame delay, frame delay variation) All test results stored into BrixWorx database for SLA compliance tracking and reporting Information also used for Birth Certificate creation in conjunction with turn-up results Results archived for historical trouble-shooting comparison/baselining NOC 2011 EXFO Inc. All rights reserved. 19

21 Birth Certificate Benefits Validate the circuit installation is performing as required by the customer s SLA Combine turn-up and burn-in results in concise performance report Use as circuit sign-off with end user Use as baseline for future performance validation and comparisons 2011 EXFO Inc. All rights reserved. 20

22 Service Assurance Data to BrixWorx BV-10 24/7 performance metrics via 802.1ag/Y.1731 to CRS or NID BV 3000 BrixWorx SLA provisioned/reported via BrixWorx NID Access Provider CESR NOC Scheduled tests from Central Office to all Access Provider sites (24X7X365) Measure KPI using standards (802.1ag and Y.1731) Alert and alarm on service degradation and failure Powerful QoS capabilities to support multiple Classes of Services Measure service performance across all VLANs and all classes of service Generate tickets on service outages Report on daily health of service Integrate with OSS, billing, and troubleshooting 2011 EXFO Inc. All rights reserved. 21

23 Service Troubleshooting Data to BrixWorx AXS-200/850 BV-10 On-demand wire-speed RFC 2544 tests For troubleshooting to HH or NID P24/7 performance metrics via 802.1ag/Y.1731 to CRS or NID; On-demand first-level troubleshooting RTU 310 BV 3000 BrixWorx SLA provisioned/reported via BrixWorx NID CESR Access Provider NOC Troubleshoot service problems without having to do a truck roll using BrixWorx on demand interfaces Launch standards based loopback and link trace tests to diagnose problems Validate end-to-end QoS for SLA Advanced wire-speed troubleshooting via tests from RTU-310 to NID and/or Handheld Tester 2011 EXFO Inc. All rights reserved. 22

24 Retail Carrier Example: QoS/CoS and SLA Assurance Intelligent oversubscription BrixNGN FE/GE ETX Carrier Ethernet BV3000 RTU-310 Egate/ETX Ethernet Access Carrier TDM Access Carrier DSLAM FE/GE SDSL VDSL2 nxt1/e1 IPmux LA-210 RIC T1s T1 ETX RADview TDM/SONET Access Carrier C.DS3 nxds3 nxoc3 nxoc12 RIC T1s RIC ON-NET monitoring OFF-NET monitoring Tester Uni/Bidirectional wire-speed RFC-2544, Y.156sam or L2/L3 Loop tests: NID NID or TESTER NID SLA Assurance: Standards based OAM (Y.1731) with Thresholds 2544 or L2/L3 Loop Y RAD Inc. All rights reserved. Slide 23

25 Mobile Operator Example: QoS/CoS and SLA Assurance Uni/Bidirectional wire-speed RFC-2544, Y.156sam or L2/L3 Loop tests SLA Assurance: Standards based OAM (Y.1731) with Thresholds 2544 or L2/L3 Loop Y.1731 BrixNGN PMS BV3000 / RTU-310 Wholesale Network Base Station aggregation enb RNC IP/MPLS Core L2/L3 Switch ENNI Wholesale Carrier Ethernet MPLS QoS/CoS with shaping and dynamic overhead compensation nxt1 enb/ LTE ETX ETX LTE enb LTE Grandmaster Clock Sync-E Intelligent oversubscription ETX HUB Site ETX enb LTE Clock recovery based on or SyncE Cell Sites 2011 RAD Inc. All rights reserved. Slide 24

26 Wholesale Carrier Example Circuit Validation, PM & Diagnostics E2E throughput tests and SLA monitoring Retail/Mobile carrier PM of access network Tester SLA Assurance: PM with Thresholds (Y.1731) Uni/Bi-directional tests (RFC-2544) Router-to-NID Local test Router Retail / Mobile Network Network RFC-2544 ETX ETX Wholesale carrier can test multiple circuits simultaneously Wholesale carrier uses OAM to detect network degradation/faults Retail/Mobile carrier can independently test any access or E2E cct RAD Inc. All rights reserved. Slide 25

27 Hardware OAM vs. Software OAM Feature Software OAM Hardware OAM Benefits of Hardware-Powered OAM OAM Scalability X OAM rate only limited by line speed Multi-flow monitoring X Monitor multiple concurrent flows simultaneously (large number of MEPs) Fast detection of connectivity failure X Fast failure restoration <50msec Real frame measurements X Detects even one lost frame as well as synthetic frames Accurate Frame delay / Frame delay variation X Loopback at line rate X MIP Support X Provides accurate FD/FDV measurements (nano second resolution) Allow line rate loopback for all MTU sizes, plus PRBS support Fully participate as a maintenance intermediate point (MIP) between MEPs 2011 RAD Inc. All rights reserved. Slide 26

28 Upgrade Legacy Ethernet network to Support Carrier Ethernet Functionality Flow based Demarcation adds: QoS/CoS E2E SLA Assurance P-Bit remarking Carrier Benefits: Improve service offering with QoS and service assurance Protect investment in legacy network by controlling bandwidth at ingress NTUs Maximize Network performance w/o compromising congestion control NTU drops traffic > PIR (Red) NTU passes traffic < PIR Green (within CIR); Yellow (within EIR) Real Time Priority Data Best Effort Real Time Ethernet over Fiber NTU EVC 1 EVC 2 RAD Enhancement: EIR traffic remarked with lower priority PE PSN PE IP DSLAM EVC EVC Branch A Ethernet over PDH NTU Branch B Ethernet over xdsl NTU Real Time Priority Data Best Effort Real Time Priority Data Priority Data Best Effort PE is color blind. All traffic is the same. If congested, priority (green) frames may be dropped Priorities maintained. i.e. Discard Eligible frames dropped first. UNI Best Effort 2011 RAD Inc. All rights reserved. Slide 27

29 Summary Customer Benefits Increase ARPU by delivering premium Ethernet services, including: 1. Enhanced QoS to deliver real-time, non real-time and best effort services 2. Performance monitoring to identify inadequate bandwidth profiles Reduce OPEX and customer service issues: 1. E2E SLA monitoring to identify network degradation 2. Rapid service provisioning and trouble shooting EXFO Advantages: 24X7X365 measure quality and performance QoS/QoE Analysis for correlation, problem isolation, and reporting Perform fault testing to proactively isolate problems and reduce repair times (Zero truck roll) Vendor Agnostic & Leverages OAM standards Proven and Easy integration into 3rd party OSS/BSS systems RAD Advantages: Supporting Service Lifecycle MEF 9 & 14 EPL/EVPL Certified Flow based solution Fiber, TDM, SONET and DSL interfaces Powerful QoS capabilities incl. per EVC shaping Accurate H/W-based Ethernet OAM Timing options including 1588ptp and SyncE Interoperable with 3rd party SLA assurance systems and test equipment 2011 EXFO Inc. All rights reserved. 28

30 Next Steps For Carrier Ethernet and other solutions please contact: Doug Fiumara NECA EXFO Inc. All rights reserved. 29