Constructs for Carrier Ethernet Networks and Services
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Transcript Constructs for Carrier Ethernet Networks and Services
Constructs for Carrier Ethernet
Networks and Services
Ralph Santitoro
Director of Carrier Ethernet Market Development, Fujitsu
Founding Member and Director, Metro Ethernet Forum
Contents
Carrier Ethernet Ecosystem and Taxonomy
Service Demarcation Constructs (UNI and ENNI)
Virtual Connectivity Constructs (EVC and OVC)
Link and Service Fault Management
Service Types and Service Definitions
San José, CA USA
February 25, 2010
Constructs for Carrier Ethernet Networks and Services
2
Carrier Ethernet Ecosystem
Standardized Services
• MEF 6.1 Service Definitions
• MEF 10.2 Service Attributes
QoS Performance
• MEF 10.1 FD, IFDV, FLR
• Y.1731 Performance Monitoring
Ethernet OAM
• 802.3ah Link Fault Management
• Y.1731 Service Fault Management
San José, CA USA
February 25, 2010
Scalability
• Layer 2 Aggregation
• Statistical Multiplexing
• VLAN Tag Reuse
Reliability / Availability
• G.8031 50ms EVC Protection
• 802.3ad UNI & ENNI Protection
Constructs for Carrier Ethernet Networks and Services
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Carrier Ethernet Taxonomy
Need to put all of this into perspective
Application
Site-to-Site Private
L2 VPN
Line
IP VPN
IPTV
Internet Video
Cloud
on
Access Demand Service
MBH
Ethernet
Connectivity
Service Type
E-Line, E-LAN, E-Tree, E-Access
Transport
Technology
Ethernet
Ethernet
Ethernet Ethernet Ethernet Ethernet Ethernet
over
over
over
over
over
over
over dry
Fiber
SDH/SONET
MPLS
WDM
µWave
PDH
Copper
Carrier Ethernet is:
• An Infrastructure technology
– Delivered over many types of Layer 1 transport technologies
• A Service Delivery technology for:
– Private Lines (Like a Layer 1 service with Ethernet interfaces)
– Site-to-site L2 VPNs
– Ethernet Access to IP applications and services
4
Constructs for Carrier Ethernet Networks and Services
Confidential - Fujitsu Internal Use Only
Carrier
Ethernet augments the
familiar Ethernet “LAN” Technology
Ethernet Service Demarcation
Ethernet User-to-Network Interface (UNI)
• Service demarcation between:
– Retail End-User (Buyer)
– Service Provider (Seller)
Ethernet External Network-to-Network Interface (ENNI)
• Service demarcation between:
– Service Provider Buyer
– Wholesale Service Provider Seller
UNIs and ENNIs provide delineation between
responsibilities of the buyer and seller of a service
San José, CA USA
February 25, 2010
Constructs for Carrier Ethernet Networks and Services
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Ethernet Service Constructs
Ethernet Virtual Connection (EVC)
• Logical association between two or more UNIs
• Retail (end-user) service construct
Operator Virtual Connection (OVC)
• Logical association between either:
– UNI and ENNI
– ENNI and ENNI
• Wholesale (service provider) service construct
EVCs describe Virtual Connectivity for Retail services
OVCs describe Virtual Connectivity for Wholesale services
San José, CA USA
February 25, 2010
Constructs for Carrier Ethernet Networks and Services
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EVC Types
UNI
MP2MP
EVC
Multipoint-to-Multipoint EVC
Equivalent to familiar usage of
Ethernet in the LAN
UNI
UNI
UNI
Point-to-Point EVC
Makes Ethernet service more like
other point-to-point services
TDM private lines
Frame Relay, ATM L2 VPNs
UNI
UNI
Root can send to or receive from any
Leaf UNI
Leaf UNIs can only send to Root UNI
RMP
EVC
Leaf
UNI
February 25, 2010
UNI
Root
UNI
Rooted Multipoint EVC
San José, CA USA
P2P
EVC
Leaf
UNI
Constructs for Carrier Ethernet Networks and Services
Leaf
UNI
7
UNI
E-NNI
E-NNI
Wholesale
Wholesale
Access Provider
Transport Provider
E-NNI
OVC1
OVC2 EVC
Retail Service
Provider
UNI
Subscriber
Subscriber
The “Big Picture” View
OVC3
UNIs at Subscriber Locations
ENNIs between
• Wholesale Access Provider and Wholesale Transport Provider
• Wholesale Transport Provider and Retail Service Provider
OVCs between
• Subscriber UNI and Wholesale Access Provider ENNI
• Wholesale Transport Provider ENNIs
• Retail Service Provider ENNI and Subscriber UNI
EVC between Subscriber UNIs
San José, CA USA
February 25, 2010
Constructs for Carrier Ethernet Networks and Services
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UNI Attributes Summary
Basic
OAM
Link
Link
• PHY Type
• Speed
• MTU size (≥1518)
Service
Service
• EVC Muxing
• CoS ID/C-VID
Preservation
• L2CP Handling
• C-VID Bundling
• Assign C-VIDs for
untagged frames
San José, CA USA
• IEEE 802.3ah
Fault Management
• IEEE 802.1ag
Continuity Check
Msgs. (CCMs)
• ITU-T Y.1731
MEPs
• UNI ID
February 25, 2010
Reliability
QoS
Link
CoS ID
Service
I/E BW Profile
• IEEE 802.3ad
Link Aggregation
(UNI protection)
• ITU-T G.8031
EVC Protection
(MEP location)
Constructs for Carrier Ethernet Networks and Services
• EVC
• C-VLAN PCP
• DSCP
• Per UNI
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ENNI Attributes Summary
Basic
OAM
Link
Link
• PHY Type
• Speed
• MTU size (≥1526)
• IEEE 802.3ah
Fault Management
Service
• C-VLAN CoS ID
Preservation
• C-VID Preservation
• S-VLAN CoS ID
Preservation
• S-VID Preservation
• L2CP Handling
San José, CA USA
Reliability
Link
Service
• IEEE 802.1ag
Continuity Check
Msgs. (CCMs)
• ITU-T Y.1731
• MIPs
• MEPs
• ENNI ID
• IEEE 802.3ad
Link Aggregation
(ENNI protection)
Service
• ITU-T G.8031
OVC Protection
(MEP location)
QoS
CoS ID
• S-VLAN PCP
• C-VLAN PCP
• DSCP
I/E BW Profile
• Per ENNI
• S-VID to OVC
Endpoint Map
February 25, 2010
Constructs for Carrier Ethernet Networks and Services
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EVC Attributes Summary
Basic
OAM
EVC Type
Service
• P-to-P
• MP-to-MP
• Rooted MP
Service
• CoS ID/C-VID
Preservation
• L2CP Handling
• MTU Size
• U/M/B Frame
Delivery
San José, CA USA
Service
• IEEE 802.1ag
Continuity Check
Msgs. (CCMs)
• EVC ID
• UNI List
• C-VID to EVC
Map
February 25, 2010
Reliability
• ITU-T G.8031
EVC Protection
(between MEPs)
• IEEE 802.1ag
Continuity Check
Msgs. (CCMs)
QoS
CoS ID
• EVC
• PCP
• DSCP
I/E BW Profile
• Per EVC
• Per EVC per CoS
Performance
•
•
•
•
Constructs for Carrier Ethernet Networks and Services
FD
IFDV
FLR
Availability
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OVC Attributes Summary
Basic
OAM
OVC Type
Service
• P-to-P
• MP-to-MP
Service
• C-CoS ID/C-VID
Preservation
• S-CoS ID/S-VID
Preservation
• L2CP Handling
• MTU Size
• U/M/B Service
Frame Delivery
San José, CA USA
Service
• IEEE 802.1ag
Continuity Check
Msgs. (CCMs)
• OVC ID
• OVC Endpoint List
(UNI & ENNI)
February 25, 2010
Reliability
• ITU-T G.8031
OVC Protection
(between MEPs)
• IEEE 802.1ag
Continuity Check
Msgs. (CCMs)
Constructs for Carrier Ethernet Networks and Services
QoS
CoS ID
• EVC
• PCP
• DSCP
I/E BW Profile
•
•
•
•
Per UNI End Point
Per UNI EP CoS
Per ENNI EP
Per ENNI EP CoS
12
Three Types of Bandwidth
Profiles (BWP) for EVCs at UNI
Port-based
EVC1
UNI
EVC2
VLAN-based
BWP
Per
UNI
EVC1
UNI
EVC3
BWP Per EVC1
EVC2
BWP Per EVC2
EVC3
BWP Per EVC3
VLAN + CoS-based
UNI
EVC1
CE-VLAN CoS 6
BWP Per CoS ID 6
CE-VLAN CoS 4
BWP Per CoS ID 4
CE-VLAN CoS 2
BWP Per CoS ID 2
Ingress and Egress
(I/E) Bandwidth
Profiles Variants
EVC2
February 25, 2010
Constructs for Carrier Ethernet Networks and Services
Bandwidth
Profiles define
how rate enforcement is applied 13
San José, CA USA
Two Types of Bandwidth Profiles
(BWP) for OVCs at ENNI & UNI
VLAN-based
UNI
or
ENNI
OVC1
BWP Per OVC EP1
OVC2
BWP Per OVC EP2
OVC3
BWP Per OVC EP3
VLAN + CoS-based
UNI
or
ENNI
OVC1
CE-VLAN CoS 6
BWP Per CoS ID 6
CE-VLAN CoS 4
BWP Per CoS ID 4
CE-VLAN CoS 2
BWP Per CoS ID 2
Ingress and Egress
(I/E) Bandwidth
Profiles Variants
OVC2
San José, CA USA
February 25, 2010
Constructs for Carrier Ethernet Networks and Services
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Bandwidth Profile (BWP) per EVC
<CIR, CBS, EIR, EBS, CM>
CIR (Committed Information Rate)
Frame delivery obligation per Service Level Objective (SLO)
CIR assured via Bandwidth Reservation and Traffic Engineering
CBS (Committed Burst Size)
Size of burst window for CIR
EIR (Excess Information Rate)
Frames dropped at congestion points
Excess frame delivery allowed
But not subject to SLO
EVC1
EVC2
CIR
CIR
EBS (Excess Burst Size)
CIR
EIR
Size of burst window for EIR
CM (Color Mode)
Determines if BWP is Color-blind or Color aware
San José, CA USA
EVC3
Total UNI Bandwidth
CIR defines the assured bandwidth
Constructs for Carrier Ethernet Networks and Services
EIR improves the user’s Goodput
February 25, 2010
EIR
EIR
15
Rate Enforcement: MEF trTCM Policer
Token Bucket Model Example
Color Marking
Token update rate:
CIR/8 tokens/second
• Green
• CIR conforming traffic
• Frames Forwarded
Service Frames
arrive at UNI
Token update rate:
EIR/8 tokens/second
Color-Blind
UNI
• Yellow
• Non-conformant with CIR
• Conformant with EIR
• Discard Eligible frames
Color-Aware
UNI
>EBS
C
≤ CBS
• Red
• Non-conformant with CIR
• Non-conformant with EIR
• Frames Discarded
>CBS
E
≤ EBS
1 Token = 1 Byte
Service Frames
admitted to Network
CBS and EBS play an important role in the user’s Quality of Experience
San José, CA USA
February 25, 2010
Constructs for Carrier Ethernet Networks and Services
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EVC / OVC Multiplexing and
C-VID Bundling
Service (EVC) multiplexing
EVC1
More than one EVC at a UNI
EVC2
Hub-and-spoke configurations
Multiple EVCs between two locations
Subscriber A UNI
OVC Multiplexing at an ENNI
More than one OVC at ENNI
Aggregated service configuration
Retail Service
Provider
(e.g., ISP)
ENNI
OVC
Wholesale
Access
OVC Provider
Subscriber B UNI
C-VID Bundling
C-VLAN to Map
Associates multiple C-VIDs to an EVC
Special Case: All-to-one Bundling
All frames mapped to one EVC
San José, CA USA
February 25, 2010
EVC1
C-VID
EVC2
1-5, 20, 30 6-12, 50
Constructs for Carrier Ethernet Networks and Services
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EVC/OVC Multiplexing
Considerations
EVC Multiplexing at a UNI
Supported for VLAN-based services
Subscriber A
EVCs
(EVPL, EVP-LAN, EVP-Tree)
Only for EVCs from same subscriber
UNI
Not for EVCs from different subscribers
UNI
Not supported for Port-based services
(EPL, EP-LAN, EP-Tree)
OVC Multiplexing at an ENNI
Supported for OVCs from different
subscribers
San José, CA USA
February 25, 2010
Subscriber
B EVCs
UNI
Subscriber A
OVCs
ENNI
Constructs for Carrier Ethernet Networks and Services
Subscriber
B OVCs
18
Ethernet OAM
Link and Service Fault Management
Ethernet OAM Jurisdictions
ENNI-N
UNI-N
UNI-C
ENNI-N
Network
Operator 2
Network
Operator 1
UNI-N
UNI-C
Service OAM
ITU-T Y.1731 End-to-End Performance Monitoring
IEEE 802.1ag End-to-End Connectivity Fault Management
Link OAM
Link OAM
San José, CA USA
February 25, 2010
IEEE 802.3ah
Link OAM
Link OAM
Constructs for Carrier Ethernet Networks and Services
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Service OAM Framework
Network
Operator
ENNI-N
ENNI-N
Service
Provider
Subscriber MEG
Service Provider MEG
Operator MEG
UNI
Subscriber
Subscriber
UNI
SP (Operator) MEG
Maintenance Entity Group (MEG)
• Administrative Domains to partition OAM
MEG End Points (MEPs)
• End Points that define boundaries of a MEG
MEG Intermediate Points (MIP)
• Intermediate Points within a MEG
San José, CA USA
February 25, 2010
Constructs for Carrier Ethernet Networks and Services
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Service OAM
Continuity Check and Link Trace
Network ENNI-N
Operator
ENNI-N
Service
Provider
UNI
Subscriber
Subscriber
UNI
Subscriber MEG
Service Provider MEG
CCM
LTM
LTR
CCM
Operator MEG
SP (Operator) MEG
Continuity Check Messages (CCMs)
• Provide continuous monitoring of an EVC or OVC between MEPs
Link Trace Message (LTM) and Link Trace Response (LTR)
• Traverses an EVC or OVC from MEP to MEP one MIP at a time
San José, CA USA
February 25, 2010
Constructs for Carrier Ethernet Networks and Services
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Service Definitions
MEF Ethernet Service Definition
Framework
Ethernet
Service
Type
Ethernet
Service
Attribute
Ethernet Service Type
Ethernet
Service
Attribute
Parameter
• Categorizes the service based on its EVC type
– Point-to-Point
– Multipoint-to-Multipoint
– Rooted Multipoint
Ethernet Service Attributes and Parameters
• Specifies the UNI & EVC requirements for each Ethernet Service Type
The MEF defines Ethernet Services using this Framework
San José, CA USA
February 25, 2010
Constructs for Carrier Ethernet Networks and Services
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Ethernet Service Classification and
Definitions for EVC-based Services
Service Type
E-Line
(Point-to-Point EVC)
Port-Based
Service
VLAN-Based
Service
Ethernet Private Line Ethernet Virtual Private Line
(EPL)
(EVPL)
E-LAN
Ethernet Private LAN Ethernet Virtual Private LAN
(EP-LAN)
(EVP-LAN)
(multipoint-to-multipoint EVC)
E-Tree
(rooted multipoint EVC)
Ethernet Private Tree Ethernet Virtual Private Tree
(EP-Tree)
(EVP-Tree)
MEF Services are classified into two categories:
• Port-based
– Single Service Instance (EVC) per UNI (dedicated network resource)
• VLAN-based
– Multiple Service Instances (EVCs) per UNI (shared network resource)
San José, CA USA
February 25, 2010
Constructs for Carrier Ethernet Networks and Services
Ethernet
Service Types
are “Umbrella” categories
25
Summary
Carrier Ethernet
• Augments Ethernet “LAN” technology for large scale deployments
• Is both an infrastructure and service delivery technology
Constructs to build an Ethernet Service
• UNI and ENNI for Service Demarcation
• EVC and OVC for Virtual Connectivity
Link and Service OAM
• Critical to deliver mass market Ethernet Service
Ethernet Service Types
• Categories of services based on their connectivity
MEF Ethernet Services categorization
• Port-based or VLAN-based Services
San José, CA USA
February 25, 2010
Constructs for Carrier Ethernet Networks and Services
26