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Carrier Ethernet Services Overview
August 2008
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Purpose
Carrier Ethernet Services Overview
This presentation defines the MEF Ethernet
Services that represent the principal attribute of aCarrier Ethernet Network
This presentation is intended to give a simple
overview as a grounding for all other MEF
documents
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Agenda
What is Carrier Ethernet?
Carrier Ethernet Terminology
The UNI, NNI, MEN. Ethernet Virtual Connections (EVCs)
EVCs and Services
E-Line Services Ethernet Private Line
Ethernet Virtual Private Line
E-LAN Services Multipoint Services E-Tree Services
Service Attributes Service Parameters
Bandwidth Profiles
Traffic Management
Circuit Emulation Services
Carrier Ethernet Architecture for Cable
Carrier Ethernet in Access Networks
MEF Specifications
Service Examples
March 2007
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Carrier Ethernet Defined
Carrier Ethernet for the Business Users:
The MEF has defined Carrier Ethernet as
A ubiquitous, standardized, carrier-class
Service and Network defined by five attributes
that distinguish it from familiarLAN based Ethernet
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Carrier Ethernet Defined
A set of certified network elements that connectto transport Carrier Ethernet services for all
users, locally & worldwide Carrier Ethernet services are carried over
physical Ethernet networks andother legacy transport
technologies
Carrier Ethernet for Service Providers:
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What is Carrier Ethernet?
Question: Is it a service, a network, or a technology?
Answer for an end-user
Its a Service defined by 5 attributes
Answer for a service provider
Its a set of certified network elements thatconnect to transport the services offered to the
customer Its a platform for value added services
A standardized service for all users
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Carrier Ethernet Terminology
UNI Type I A UNI compliant with MEF 13
Manually Configurable
UNI Type II Automatically Configurable via E-LMI
Manageable via OAM Network to Network Interface (NNI)
Network to Network Interface between distinct MEN operated byone or more carriers
An active project of the MEF
Metro Ethernet Network (MEN) An Ethernet transport network connecting user end-points
(Expanded to Access and Global networks in addition to theoriginal Metro Network meaning)
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Carrier EthernetNetwork
UNI
MEF Carrier Ethernet Terminology
The User Network Interface (UNI)
The UNI is the physical interface or port that is thedemarcation between the customer and the service
provider/Cable Operator/Carrier/MSO
The UNI is always provided by the Service Provider
The UNI in a Carrier Ethernet Network is a physical
Ethernet Interface at operating speeds 10Mbs, 100Mbps,1Gbps or 10Gbps
CE: Customer Equipment, UNI: User Network Interface. MEF certified Carrier Ethernet products
CE
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MEF Carrier Ethernet Terminology
Ethernet Virtual Connection (EVC) Service container
Connects two or more subscriber sites (UNIs)
An association of two or more UNIs
Prevents data transfer between sites that are notpart of the same EVC
Three types of EVCs
Point-to-Point
Multipoint-to-Multipoint
Rooted Multipoint
Can be bundled or multiplexed on the same UNI
Defined in MEF 10.1 technical specification
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EVCs and Services
In a Carrier Ethernet network, data is transported
across Point-to-Point and Multipoint-to-Multipoint
EVCs according to the attributes and definitions of
the E-Line, E-LAN and E-Tree services
Point-to-Point EVC
Carrier EthernetNetwork
UNI UNI
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Carrier Ethernet Service Types (1 of 3): E-Line
E-Line Service used to create
Ethernet Private Lines
Virtual Private Lines
Ethernet Internet AccessE-Line Service type
Point-to-Point EVC
Carrier Ethernet
Network
UNI: User Network Interface, CE: Customer Equipment
CE
UNI UNI
CE
MEF certified Carrier Ethernet products
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Carrier Ethernet Service Types (2 of 3): E-LAN
E-LAN Service used to create
Multipoint L2 VPNs
Transparent LAN Service
Foundation for IPTV and
Multicast networks etc.
E-LAN Service type
UNI: User Network Interface, CE: Customer Equipment
Multipoint-to-Multipoint EVC
Carrier EthernetNetwork
CE
UNI
MEF certified Carrier Ethernet products
CE
UNI
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Carrier Ethernet Service Types (2 of 3): E-Tree
Used for Applications requiring Point-to-Multipoint
topology Video on demand, internet access, triple play backhaul, mobile
cell site backhaul, franchising applications
Provides traffic separation between Leaf UNIs
Traffic from any leaf UNI can be sent/received to/from RootUNI(s) but never being forwarded
to other Leaf UNIs
Root
CEUNI
UNI
UNI
CE
CE
Leaf
Leaf
UNI
CE
Leaf
Rooted Multipoint EVC
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Services Using E-Line Service Type
Ethernet Private Line (EPL)
Replaces a TDM Private line
Dedicated UNIs for Point-to-Point connections
Single Ethernet Virtual Connection (EVC) per UNI
The most popular Ethernet service due to its simplicity
Point-to-Point EVC
Carrier EthernetNetworkCE UNI
CE
UNI
CE
UNI
ISP
POP
UNI
Storage Service
Provider
Internet
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UNI
Services Using E-Line Service Type
Ethernet Virtual Private Line (EVPL)
Replaces Frame Relay or ATM services
Supports Service Multiplexed UNI
(i.e. multiple EVCs per UNI)
Allows single physical connection (UNI) to customerpremise equipment for multiple virtual connections
Carrier Ethernet Network
CEUNI
CE
UNI
Point-to-Point EVC
CE
ISP
POP
Internet
Service
Multiplexed
Ethernet UNI
CE
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Services Using E-LAN Service Type
Ethernet Private LAN (EP-LAN) and Ethernet
Virtual Private LAN (EVP-LAN) Services Supports dedicated or service-multiplexed UNIs
Supports transparent LAN services and multipoint
Layer 2 VPNs
Service
Multiplexed
Ethernet
UNI
Mulitipoint-to-Multipoint EVC
Carrier
EthernetNetwork
CE
UNI
UNI
UNI
CE
UNI
CE
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MEF 6.1 Ethernet Services Definitions Phase 2
MEF 6.1 Enhancements
Defines a new service type (E-Tree) in addition to those
defined in MEF 6
Adds four new services two each to E-LAN and E-Tree
Service Type
Port-Based
(All-to-One Bundling)
VLAN-Based
(Service Multiplexed)
E-Line
(Point-to-Point EVC)
Ethernet Private Line
(EPL)
Ethernet Virtual Private Line
(EVPL)
E-LAN
(multipoint-to-multipoint
EVC)
Ethernet Private LAN
(EP-LAN)
Ethernet Virtual Private LAN
(EVP-LAN)
E-Tree
(rooted multipoint EVC)
Ethernet Private Tree
(EP-Tree)
Ethernet Virtual Private Tree
(EVP-Tree)
No change Modified New
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Services Using E-Tree Service Type
Ethernet Private Tree (EP-Tree) and Ethernet
Virtual Private Tree (EVP-Tree) Services Provides traffic separation between users with trafficfrom one leaf being allowed to arrive at one of moreRoots but never being transmitted to other leaves
Targeted at multi-host and where user traffic must be
kept invisible to other users Anticipated to be an enabler for mobile backhaul
and triple-play infrastructure ratherthan end-user SLAs
Root
Carrier Ethernet Network
CE
UNI
UNI
UNI
CE
UNI
CE
Leaf
Leaf
UNI
CE
Leaf
See examples at the end of presentation. E-Tree is referenced in MEF 10.1 as Rooted-Multipoint EVC.
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Carrier Ethernet Architecture (1)
DataPl
ane
ControlPlane
ManagementPlane
Transport Services Layer(e.g., IEEE 802.1, SONET/SDH, MPLS)
Ethernet Services Layer(Ethernet Service PDU)
Application Services Layer(e.g., IP, MPLS, PDH, etc.)APP Layer
ETH Layer
TRAN Layer
Data moves from UNI to UNI across "the network" with a
layered architecture.
When traffic moves between ETH domains is does so at the
TRAN layer. This allows
Carrier Ethernet traffic to be
agnostic to the networksthat it traverses.
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Ethernet Services Layer Terminology
Carrier Ethernet Architecture (2)
Service Provider 1
Carrier EthernetNetwork
CE
UNI
Ethernet Services Eth Layer
Subscriber
Site
ETH
UNI-C
ETH
UNI-N
ETH
UNI-N
ETH
E-NNI
ETH
UNI-C
UNI: User Network Interface, UNI-C: UNI-customer side, UNI-N network side
NNI: Network to Network Interface, E-NNI: External NNI; I-NNI Internal NNI
CE: Customer Equipment
UNI
CE
I-NNI E-NNI
Service Provider 2
I-NNI
ETH
E-NNI
Subscriber
Site
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Service Parameters
EVC Service Attributes Details regarding the EVC including
Bandwidth profiles, QoS Assignment and Taggingoptions
Latency, Delay Variation (Jitter), Frame-loss
Bandwidth Profiles Committed Information Rate
Excess Information Rate
Rate Enforcement - Shaping and Policing
Burst size (window)
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CIR and EIR Bandwidth Profiles
BW profiles per EVC
CIR Committed Information Rate Frame delivery obligation per
SLA
EIR Excess Information Rate
Excess frame delivery allowed
not subject to SLA if available
CBS, EBS - size of burst window
(ms) for allowed CIR / EIR rates
Total UNI BW
EVC1 EVC2
EVC3
EIR
2 rate, 3 Color marking
Marking typically done at ingress
Green Forwarded framesCIR conforming traffic
Yellow Discard Eligible framesOver CIR , within EIR
Red Discarded framesExceeds EIR
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UNI
EVC1
EVC2
EVC3
Ingress BandwidthProfile Per Ingress UNI
UNI
EVC1
EVC2
EVC3
Ingress BandwidthProfile Per EVC1Ingress BandwidthProfile Per EVC2
Ingress Bandwidth
Profile Per EVC3
UNI EVC1
CE-VLAN CoS 6 Ingress Bandwidth Profile Per CoS ID 6
CE-VLAN CoS 4
CE-VLAN CoS 2
Ingress Bandwidth Profile Per CoS ID 4
Ingress Bandwidth Profile Per CoS ID 2
EVC2
Port-based Port/VLAN-based
Port/VLAN/CoS-based
MEF 10.1 Traffic Management Model
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Carrier Ethernet Scope and Reach
Bringing vastly extended scalability for business and residential users
Wireless
Backhaul
VoiceGateway
Voice/VideoTelephony
HD TVTVoD, VoD
Gaming, BusinessBackup, ERP
Residential
Triple-Play
Broadband
mobile data/video
Video
Source
Video
Source
Small/Medium
Business
Internet
FTTx and DSLAM , Cable Modem
E-Line and
E-LAN service
Ci i E l i S i C i E h
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TDM Circuits
(e.g. T1/E1 Lines)
Circuit Emulation Services over Carrier Ethernet
Enables TDM Services to be transported
across Carrier Ethernet network, re-
creating the TDM circuit at the far end
Runs on a standard Ethernet Line Service (E-Line)
Carrier Ethernet NetworkTDM Circuits
(e.g. T1/E1 Lines)Circuit Emulated
TDM Traffic
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Carrier Ethernet Architecture for Cable Operators
Headend Hub
EQAM
CMTS
Optical Metro Ring Network
Video
Server
D2A
Ad
Insertion
E-LAN
E-LineBusiness Services
over Fiber (GigE)
Voicegateway
Voice/VideoTelephony
Digital TV, VOD,Interactive TV,
Gaming
Managed BusinessApplications
Internet
AccessAnalog
TV Feeds
A2D
HubUNI
CE
E-NNI
Another MSO or carrier
Network
EoDOCSIS(future)
EoT1/DS3
PON
Greenfield Residential & Business Services
EoSONET/SDH
CEUNI
WDM
UNI
Home RunFiber
EoCoaxEoHFC
SwitchedFiber
BusinessPark
Business
Services
Node
E-LineE-LAN
CE
UNI
CE
Wireless
Plant
ExtensionLeased
T1/DS3
CEUNI
R l t d MEF S i S ifi ti
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Related MEF Services Specifications
Purpose Defines the Ethernet Services (EPL, EVPL, E-Line, ELAN, and E-Tree)
MEF 6.1
Purpose
Defines the service attributes and parameters required to offer the services
defined in MEF 6. Updated from Original MEF 10 in October 2006
Audience
Appropriate for equipment vendors, service providers, and business
customers, since it provides the fundamentals required to build devices
and services that deliver Carrier Ethernet. For Enterprise users it gives the
background to Service Level Specifications for Carrier Ethernet Services
being offered by their Service Providers and helps to plan Ethernet
Services as part of their overall network.
Ethernet Services Attributes Phase 2MEF 10.1
Metro Ethernet Services Definitions Phase II
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Example Uses of Services
E l f EPL
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Examples for EPL
HQ
Branch
Branch
EPL
EPL
Simple configuration The port to the Internet
it is un-trusted
The port to the
branches it is trusted
No coordination withMEN SP for HQ to
branch subnets
Fractional bandwidth
(Bandwidth Profile) to
minimize monthly servicecharges
Internet
Firewall
E l U EVPL
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Example Use EVPL
ISP
Customer 1
Turbo 2000
Internet Access, Inc.
ISP
Customer 2
ISPCustomer 3
Service Multiplexing
VLAN 2000 BlueVLAN 2000 Yellow
VLAN 2000 Green
VLAN 178 BlueVLAN 179 YellowVLAN 180 Green
Efficient use of ISP router ports
Easy configuration at ISP customer sites
This port and VLAN 2000 (or even untagged) to Turbo Internet
E l U f EVP LAN
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Example Use of EVP-LAN
Credit Check, Inc.
Instant
Loans, Inc.
Walk In Drive OutUsed Cars, Inc.
Redundant points of access for critical availability higher layer service Efficient use of DDCs router ports
IL and Used Cars cannot see each others traffic
Service Multiplexing
A
B
D
EVC1C
EVC2
E l U f EP T
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Example Use of EP-Tree
A
B
C
D
EVC1
Internet for theSmall Guy, Inc.
Small Guy Travel
Root
Leaves
Diminutive Guy
Gaming Center
Tiny Guy Coffee
Efficient use of ISG router port
One subnet to configure on ISG router
Simple configuration for the little guys
Small, Tiny, and Diminutive Guys cant see each others traffic Second Root would provide redundant internet access
Some limits on what routing protocols can be used
E l U f EVP T
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Example Use of EVP-Tree
A
B
C
D
EVC1
Internet for the
Small Guy, Inc.
Small Guy Travel
RootsLeaves
Diminutive Guy
Gaming Center
Tiny Guy Coffee
Efficient use of ISG router port
Efficient distribution of elevator video
Small, Tiny, and Diminutive Guys cant see each others traffic, EV
Franchises cant see each others traffic
Second Root would provide redundant internet access
Some limits on what routing protocols can be used
Elevator Video Franchises
LeavesService Multiplexing
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