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The growth in popularity of Business Ethernet services is closely linked to the level of maturity Ethernet technology has reached, enabling carriers to deliver and audit hard service level agreement (SLA) guarantees that satisfy exacting requirements from enterprise users. The following presentation shows the benefits of end-to-end service management to ensure customer SLA and better system maintenance
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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 ManagementApril 2011
Ron AgamHead of Product Management &Business DevelopmentRAD Data Communications
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 2
Differentiate at Customer Touch-points – Service Life Cycle
ServiceTurn-up
On-going Monitoring
Fault Management & Recovery
“Before I start paying”
“While It’s working”
“When something is not
working…”
Source: E&Y 2010
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 3
Reliability of L2 ServicesHW Based OAM mechanism
Feature HardwareOAM
Software OAM HW Based OAM Benefits
Scalability √ X Significantly increases number of local and remote MEPs
Rapid detection of connectivity failure √ X Fast 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 √ X Detect even a single frame loss
Layer 2 Services Must be
transparent and dependable
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 NIDETX-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)
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 5
Performance Mgt. AccuracyDelay Measurement
Summary of available Ethernet OAM mechanisms
OAM Technology End-End/Last Segment
Performance Monitoring Type Fault Propagation
IEEE 802.3-2005 (formerly 802.3ah) Single Segment No Link No
IEEE 802.1ag End-to-End No Connectivity No
ITU-T Y.1731 End-to-End Yes Service Yes
SW Based OAM ExampleCPU reaction time: 1ms, variance of 2ms
Delay accuracy of 2ms - typical SLA at 1msHW based OAM: A few micro seconds
PEEVC
Real Time
Best Effort
UNI
PSNEVC 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
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
OAM Technology End-End/Last Segment
Performance Monitoring Type Fault Propagation
IEEE 802.3-2005 (formerly 802.3ah) Single Segment No Link No
IEEE 802.1ag End-to-End No Connectivity No
ITU-T Y.1731 End-to-End Yes Service Yes
PEEVC
Real Time
Best Effort
UNI
PSNEVC 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 requiredNon-synthetic, HW Based mechanism is immediate
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 7
PEEVC
Real Time
Best Effort
UNI
PSNEVC 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
ETX
• Line Rate Traffic Generator• Concurrent Multiple CoS• L2 path as the service• Data integrity testing -
PRBS
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 8
Differentiate at Customer Touch-Points – Service Life Cycle
ServiceTurn-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 VerificationTesting
• 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
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 9
Tier 1 operator, USA
• 3rd telecom provider in the US• EPL and EVPL Services, wholesale
Services: Retail, Wholesales and Mobile Backhaul.
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 10
Tier 1 Operator - Europe
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 CommunicationsCarriers &Service Providers
Mobile Operators Transportation Utilities
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 12
Thank You For Your Attention
www.rad.com