1. Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 1 Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management April 2011

2. Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 2 Differentiate at Customer Touch-points – Service Life Cycle Service Turn-up On-going Monitoring Fault Management & Recovery “Before I start paying” “While It’s working” “When something is not working…” Source: E&Y 2010

3. Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 3 Reliability of L2 Services HW Based OAM mechanism Feature Hardware OAM Software OAM HW Based OAM Benefits Scalability√X Significantly increases number of local and remote MEPs Rapid detection of connectivity failure√XFast failure restoration <50msec Accurate frame delay & frame delay variation √X Provide accurate DV/FDV measurements Multi-Flow monitoring√X Monitor multiple concurrent flows simultaneously Loopback at line rate√X Allow line rate loopback for all MTU sizes, support PRBS string Accurate frame loss measurements√XDetect even a single frame loss

4. Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 4 Fault Management Isolation with Layer 2/3 loopback Network “Loopback packets which have VID 100 & IP SA 117.155.160.13 + perform IP & MAC swap” “Send a packet with VID 100 and IP SA 117.155.160.13 12 and wait for a reply Carrier Ethernet NID ETX-204A Tester Supports L2 or L3 loopbacks up to line rate Can be used for throughput testing across routed/switched networks. Flexible loopback criteria: –Src\Dst MAC, Src/dst IP, VLAN, p bit, DSCP, etc. –Vlan+Mac, VLAN + IP, Vlan+Pbit, etc. Non-Intrusive loopback on a dedicated flow – always “on”, with no need to configure the remote NTU Ability to loopback many flows simultaneously (on both user & network sides)

5. Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 5 Performance Mgt. Accuracy Delay Measurement Summary of available Ethernet OAM mechanisms SW Based OAM Example CPU reaction time: 1ms, variance of 2ms Delay accuracy of 2ms - typical SLA at 1ms HW based OAM: A few micro seconds SW Based OAM Example CPU reaction time: 1ms, variance of 2ms Delay accuracy of 2ms - typical SLA at 1ms HW based OAM: A few micro seconds PE EVC Real Time Best Effort UNI PSN EVC 1 EVC 2 Branch A Headquarters Real Time Priority Data Best Effort UNI PE EVC Branch B Real Time Priority Data Best Effort Priority Data Real Time Priority Data Best Effort IP DSLAM Hardware based OAM Micro-seconds accuracy

6. Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 6 Performance Mgt. Accuracy Frame Loss Ratio Summary of available Ethernet OAM mechanisms PE EVC Real Time Best Effort UNI PSN EVC 1 EVC 2 Branch A Headquarters Real Time Priority Data Best Effort UNI PE EVC Branch B Real Time Priority Data Best Effort Priority Data Real Time Priority Data Best Effort IP DSLAM Hardware based OAM Micro-seconds accuracy Synthetic Based OAM Example - 20Mbps service, 1500 frame size results in ~1600 PPS -Approx. 0.01% packet loss and required +/-0.1% error 70 days of measurements are required Non-synthetic, HW Based mechanism is immediate Synthetic Based OAM Example - 20Mbps service, 1500 frame size results in ~1600 PPS -Approx. 0.01% packet loss and required +/-0.1% error 70 days of measurements are required Non-synthetic, HW Based mechanism is immediate

7. Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 7 PE EVC Real Time Best Effort UNI PSN EVC 1 EVC 2 Branch A Headquarters Real Time Priority Data Best Effort UNI PE EVC Branch B Real Time Priority Data Best Effort Priority Data Real Time Priority Data Best Effort ETX IP DSLAM Traffic Generation On-demand Throughput Testing Create a “birth certificate” at service turn-up Provide customer with report before service starts Confirm troubleshooting has succeeded Period testing for: Preventive maintenance & capacity planning ETX Line Rate Traffic Generator Concurrent Multiple CoS L2 path as the service Data integrity testing - PRBS Line Rate Traffic Generator Concurrent Multiple CoS L2 path as the service Data integrity testing - PRBS

8. Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 8 Differentiate at Customer Touch-Points – Service Life Cycle Service Turn-up On-going Monitoring Fault Management & Recovery Connectivity Verification Ethernet OAM - 802.1ag Continuity Check MAC Ping Diagnostic Loopbacks Loopbacks L1 physical interface loopback L2/L3 Loopback per flow with MAC/IP swap (up to line rate) SLA Verification Testing RFC-2544 based tests Throughput, Loss and Delay tests Data integrity tests (BERT) Delay Measurement Performance Monitoring Ethernet OAM – Y.1731 Frame Delay, Frame Delay, Frame Loss Service availability (G.826) SLA Threshold Reporting Defining SLA objectives and proactively notified when crossed Alarms and traps on management system Statistics Collection Reporting Collecting SLA statistics Statistics collection via SNMP or FTP Statistics can be used to generate SLA reports Fault Detection & Isolation Ethernet OAM – 802.1ag Continuity Check Loopback Link Trace Fault Propagation & Notification Ethernet OAM – Y.1731 Per EVC ‘Forward’ and ‘Backward ’ Alarm Propagation (AIS and RDI) Dying Gasp indication to active - 802.3ah Per port Alarm Propagation Resiliency & Repair Linear Protection ( “EVC Protection”) - G.8031 Ethernet Ring Protection - G.8032 port protection based on Link Aggregation - 802.3 (formerly 802.3ad) Managing the Service life cycle is essential to control the OpEx

9. Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 9 Tier 1 operator, USA 3 rd telecom provider in the US EPL and EVPL Services, wholesale Services: Retail, Wholesales and Mobile Backhaul.

10. Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 10 Tier 1 Operator - Europe

11. Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 11 International vendor of leading access and backhaul products Solutions for carriers, service providers and enterprise customers A wealth of over 160 product lines Established in 1981 and privately owned Part of the RAD group, 4000 employees with $1B turnover in 2010 About RAD Data Communications Carriers & Service Providers Mobile Operators Transportation Utilities

12. Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 12 Thank You For Your Attention www.rad.com