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1
MEF Service Types and Service DefinitionsOverview and Use Cases
Ralph [email protected]
Presentation best viewed in slideshow mode
22011 Q2 QUARTERLY MEETING – PRAGUE, CZECH REPUBLIC
Update from 1Q11 Quarterly Meeting in Miami
• Specification name change– OVC Services Definitions changed to:
Ethernet Access Services Definitions
• Terminology Changes– E-Access Line Service Type changed to:
E-Access Service Type • Why? Enables single service type to cover current
Point-to-Point and future Multipoint services– Service Definition Name Changes:
• E-APL renamed to Access EPL• E-AVPL renamed to Access EVPL
• New Term Defined: Ethernet Access Provider
32011 Q2 QUARTERLY MEETING – PRAGUE, CZECH REPUBLIC
The “Big Picture” View for Site to Site Services Point-to-Point EVC Example
• UNIs at Subscriber Locations
• ENNI between:– Ethernet Access Provider (operator) and Retail Service Provider
• Point-to-Point (P2P) OVCs between:– OVC1 between Subscriber UNI1 and Ethernet Access Provider ENNI– OVC2 Retail Service Provider ENNI and Subscriber UNI2
• P2P EVC between Subscriber UNIs
E-NNI
Ethernet Access Provider
Retail Service Provider
UNI1 UNI2
P2P OVC1 P2P OVC2
Su
bscrib
erSu
bsc
rib
er
ENNI
P2P EVC
42011 Q2 QUARTERLY MEETING – PRAGUE, CZECH REPUBLIC
Ethernet Service Definition Framework
• UNI-to-UNI (EVC-based) Service Types (MEF 6.1)– E-Line: Point-to-Point– E-LAN: Multipoint-to-Multipoint– E-Tree: Rooted Multipoint
• UNI(s) to ENNI (OVC-based) Service Type (New Spec.)– E-Access
• Point-to-Point services currently being defined• Multipoint-to-Multipoint services may be defined
– In future update to specification
Ethernet Service
TypeEthernet Service
Attribute
Ethernet Service
AttributeParameter
Ethernet Service Type: Marketing term to categorize a service
52011 Q2 QUARTERLY MEETING – PRAGUE, CZECH REPUBLIC
Ethernet Service Definition Framework
• Ethernet Service Attributes and Parameters (per Service Type)– Specifies requirements for:
• EVCs, UNIs, EVC per UNI • OVC per UNI or ENNI endpoint• Layer 2 Control Protocol (L2CP) disposition
Ethernet Service
TypeEthernet Service
Attribute
Ethernet Service
AttributeParameter
Service Attributes Enable Service Differentiation
62011 Q2 QUARTERLY MEETING – PRAGUE, CZECH REPUBLIC
Ethernet Service Classification and Definitions for EVC-based Services
Service TypePort-Based
ServiceVLAN-Aware
ServiceE-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)
• MEF EVC-based services are classified into 2 categories:– Port-based
• Single Service Instance (EVC) per UNI (dedicated UNI)
– VLAN-aware• Multiple Service Instances (EVCs) per UNI (multiplexed UNI)
Ethernet Service Types are “Umbrella” categories
72011 Q2 QUARTERLY MEETING – PRAGUE, CZECH REPUBLIC
Ethernet Service Classification and Definitions for Ethernet Access Services (UNI to ENNI)
Service Type Port-Based Service (at the UNI)
VLAN-Aware Service (at the UNI)
E-AccessAccess Ethernet
Private Line(Access EPL)
Access Ethernet Virtual Private Line(Access EVPL)
Ethernet Access Services classified into two categories (just like EVC-based services):
• Port-based at the UNI endpoint• Single OVC Instance per UNI (dedicated UNI endpoint)
• VLAN-aware at the UNI endpoint• Multiple OVC Instances per UNI endpoint (multiplexed UNI endpoint)
• ENNI supports multiplexed Access EPLs or Access EVPLs
Access EPL = Port-based P2P Ethernet access serviceAccess EVPL = VLAN-aware P2P Ethernet access service
8
Frequently Asked Questions
92011 Q2 QUARTERLY MEETING – PRAGUE, CZECH REPUBLIC
Ethernet Access Services FAQs
• Ethernet Access Services are point-to-point. Does this limit retail services to E-Line ?– No. Any E-Line (P2P) and E-LAN (MP2MP) services can
be delivered using Ethernet Access Services.
• Access EPL is defined with a single CoS. Does this limit a retail service to a single CoS?– No. Retail provider can define a multi-CoS service.– Access EPL CoS must be selected to meet the multi-CoS
requirements
10
Use cases and examples
This section should be viewed in slide show mode
112011 Q2 QUARTERLY MEETING – PRAGUE, CZECH REPUBLIC
Ethernet Private Line (EPL) example that uses Access EPL
• Retail Provider orders Access EPL from Ethernet Access Provider– Access provider constructs OVC1 between Subscriber UNI1 and ENNI
• Retail Service Provider constructs OVC– OVC2 between ENNI and Subscriber UNI2
• Retail Provider constructs EVC between subscriber locations
• Retail Service Provider delivers EPL to Subscriber
E-NNI
Ethernet Access Provider
Retail Service Provider
UNI1 UNI2
P2P OVC1
Su
bscrib
erSu
bsc
rib
er
ENNI
P2P OVC2P2P EVCAccess EPL ordered
EPL delivered
122011 Q2 QUARTERLY MEETING – PRAGUE, CZECH REPUBLIC
Internet Access Service example using Access EPL
• ISP orders Access EPL from Ethernet Access Provider– Access provider constructs OVC between Subscriber UNI and ENNI
• ISP delivers Internet Access Service
E-NNI
Ethernet Access Provider
Internet Service Provider
UNI
P2P OVC
Su
bsc
rib
er
ENNI
Access EPL ordered
132011 Q2 QUARTERLY MEETING – PRAGUE, CZECH REPUBLIC
EVPL Example using Access EPL
• Retail Provider orders Access EPL from Ethernet Access Provider– Access Provider constructs OVC between Subscriber UNI1 and ENNI
• Retail Service Provider constructs OVC2 between:– ENNI and Subscriber UNI2
• Retail Provider constructs P2P EVC between subscriber sites 1 & 2– Retail Provider delivers EVPL1 to Subscriber
• Subscriber adds new site and wants to connect to site 2• Retail Provider constructs P2P EVC between subscriber sites 2 & 3
– Retail Service Provider delivers EVPL2 to Subscriber
E-NNI
Ethernet Access Provider
Retail Service Provider
UNI1 UNI2
P2P OVC1
Su
bscrib
er Site 2S
ub
scri
ber
Sit
e 1
ENNI
P2P OVC2P2P EVCAccess EPL ordered
EVPL1 delivered
P2P EVC
EVPL2 deliveredSubscriber Site 3
142011 Q2 QUARTERLY MEETING – PRAGUE, CZECH REPUBLIC
EVPL Example using Two Access EPLs
• Retail Provider buys Access EPL1 from Ethernet Access Provider– To connect Subscriber Site 1 UNI1 to ENNI
• Retail Provider buys Access EPL2 from Ethernet Access Provider– To connect Subscriber Site 2 UNI2 to ENNI
• Retail Service Provider sells EVPL1 to Subscriber– To connect Subscriber Sites 1 and 2
• Retail Service Provider sells EVPL2 to Subscriber– To connect Subscriber Sites 2 and 3
E-NNI
Ethernet Access Provider
Retail Service Provider
UNI1
UNI2
UNI3
Su
bscrib
er Site 2S
ub
scri
ber
Sit
e 1
ENNI
Access EPL1
Access EPL 2EVPL2
Subscriber Site 3
EVPL1
152011 Q2 QUARTERLY MEETING – PRAGUE, CZECH REPUBLIC
EP-LAN Service example using 2 Access EPL tail circuits
• Retail Provider buys Access EPL1 Ethernet Access Provider1– To connect Subscriber Site 1 UNI1 to ENNI1
• Retail Provider buys Access EPL2 from Ethernet Access Provider2– To connect Subscriber Site 2 UNI2 to ENNI2
• Retail Service Provider sells EP-LAN to Subscriber– To connect Subscriber Sites 1, 2 and 3
Ethernet Access Provider1
Retail Service ProviderUNI1
UNI2
Subscriber Site 2Subs
crib
er S
ite 1
E-NNI1
Access EPL1
Subscriber Site 3
Two off-net sites reached using Access EPLs
Ethernet Access Provider2
E-NNI2
UNI3
Access EPL2
EP-LAN
162011 Q2 QUARTERLY MEETING – PRAGUE, CZECH REPUBLIC
EVPL Example using 1 Access EPL and 2 Access EVPLs
• Retail Provider buys Access EPL from Ethernet Access Provider1 – To connect Subscriber Site 1 UNI1 to ENNI1
• Retail Provider buys Access EVPL1 from Ethernet Access Provider2– To connect Subscriber Site 2 UNI2 to ENNI2
• Retail Service Provider delivers EVPL1 to Subscriber– To connect Subscriber Sites 1 UNI1 and 2 UNI2
• Retail Provider buys Access EVPL2 from Ethernet Access Provider2– To connect Subscriber Site 2 UNI2 to ENNI2– 2 OVCs multiplexed at UNI2
• Retail Service Provider delivers EVPL2 to Subscriber– To connect Subscriber Site 2 UNI2 and Site 3 UNI3
Ethernet Access Provider1
Retail Service ProviderUNI1
UNI2
Subscriber Site 2Su
bscr
iber
Site
1
ENNI1
Access EPL
Subscriber Site 3
Ethernet Access Provider2
ENNI2UNI3
EVPL1
Access EVPL1
Access EVPL2
EVPL2
172011 Q2 QUARTERLY MEETING – PRAGUE, CZECH REPUBLIC
Summary
• EVCs can be composed of 2 or more OVCs– If there is no ENNI, there are no OVCs
• New E-Access Ethernet Service Type– Category of services which provide connectivity between one or
more UNIs and one ENNI– Targeting Wholesale Ethernet Access Services
• Access EPL (Access Ethernet Private Line)– Port-based P2P Ethernet Access Service Definition
• Supporting 1 access service per UNI– Consists of 1 UNI and 1 ENNI
• Access EVPL (Access Ethernet Virtual Private Line)– VLAN-aware P2P Ethernet Access Service Definition
• Supports multiple access services per UNI– Consists of 1 UNI and 1 ENNI