Carrier Ethernet Network Solutions:
The Benefits of End-To-End Ethernet
Service Management
April 2011
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 1
Differentiate at Customer
Touch-points – Service Life Cycle
Service
Turn-up
“Before I start
paying”
On-going
Monitoring
“While It’s
working”
Fault
Management
& Recovery
“When
something is not
working…”
Source: E&Y 2010
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 2
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
√
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
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 3
Fault Management
Isolation with Layer 2/3 loopback
“Send a packet with
VID 100 and IP SA
117.155.160.13 12 and
wait for a reply
“Loopback packets which
have VID 100 & IP SA
117.155.160.13 + perform
IP & MAC swap”
Network
Tester
Carrier Ethernet NID
ETX-204A
• 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 4
Performance Mgt. Accuracy
Delay Measurement
Headquarters
PE
UNI
Real Time
EVC
PE
EVC 1
PSN
Best Effort
Priority Data
Best Effort
Real Time
Priority Data
Branch A
Branch B
EVC 2
IP DSLAM
Real Time
Real Time
EVC
Priority Data
Priority Data
Best Effort
Best Effort
UNI
SW Based OAM Example
End-End/Last time:
Performance
CPU reaction
1ms, variance
of Fault
2ms
OAM Technology
Type
Propagation
Segment
Monitoring
Delay accuracy
of 2ms
- typicalLinkSLA at 1ms
IEEE 802.3-2005
Single Segment
No
No
(formerly 802.3ah)
HW
based
OAM:
A
few
micro
seconds
IEEE 802.1ag
End-to-End
No
Connectivity
No
Summary of available Ethernet OAM mechanisms
ITU-T Y.1731
End-to-End
Yes
Service
Yes
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 5
Performance Mgt. Accuracy
Frame Loss Ratio
Headquarters
PE
UNI
Real Time
EVC
PE
EVC 1
PSN
Best Effort
Real Time
Priority Data
Best Effort
Real Time
Priority Data
Branch A
Branch B
EVC 2
IP DSLAM
Real Time
EVC
Priority Data
Priority Data
Best Effort
Best Effort
UNI
Summary of available
Ethernet
mechanisms
Synthetic
Based
OAMOAM
Example
End-End/Last
Performance
- 20Mbps
service,
1500
frame
size results inType~1600Fault
PPSPropagation
OAM Technology
Segment
Monitoring
-Approx.
0.01% packet
loss and No
required +/-0.1%
error No
IEEE 802.3-2005
Single Segment
Link
(formerly 802.3ah)
70
days
of
measurements
are
required
IEEE 802.1ag
End-to-End
No
Connectivity
No
Non-synthetic,
HW Based Yes
mechanism
ITU-T Y.1731
End-to-End
Serviceis immediate
Yes
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 6
On-demand Throughput Testing
Branch A
Traffic Generation
Headquarters
PE
UNI
Real Time
ETX
EVC
Priority Data
Best Effort
Real Time
PE
ETX
• Priority
LineDataRate Traffic
Generator
EVC 1
• Concurrent
Multiple
CoS
Best Effort
EVC 2
• L2 path as the service
Real Time
• Data integrity testing - PRBS
PSN
Branch B
IP DSLAM
EVC
Real Time
ETX
Priority Data
Priority Data
Best Effort
Best Effort
UNI
•
•
•
•
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
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 7
Differentiate at Customer
Touch-Points – Service Life Cycle
Service
Turn-up
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
On-going
Monitoring
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 Management
& Recovery
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 8
Tier 1 operator, USA
Services: Retail, Wholesales
and Mobile Backhaul.
• 3rd telecom provider in the US
• EPL and EVPL Services, wholesale
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 9
Tier 1 Operator - Europe
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 10
About RAD Data Communications
Carriers &
Service Providers
• 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
Mobile Operators
Transportation
Utilities
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 11
Thank You
For Your
Attention
www.rad.com
Carrier Ethernet Network Solutions: The Benefits of End-To-End Ethernet Service Management Slide 12