1. … what buyers need to understand … what providers need to communicate Ralph Santitoro Co-chair, MEF Technical Marketing Committee rsantito@nortelnetworks.com Metro Ethernet Services

2. 2 Metro Ethernet Services Overview v1.2 Contents Ethernet as a Service Ethernet Service Benefits MEF Phase I Service Documents Defining an Ethernet Service Example E-Line and E-LAN Services Ethernet SLAs Ethernet Service Summary References and Resources

3. 3 Metro Ethernet Services Overview v1.2 Ethernet as a Service Ethernet’s origins in the Enterprise –Used as a LAN connectivity technology –Just plug it in and start using it Ethernet’s new usage as a Service –Requires “service attributes” like other MAN / WAN services Ethernet UNI, Ethernet “VC”, Service Performance, etc. Same Ethernet technology just used in a new way

4. 4 Metro Ethernet Services Overview v1.2 Ethernet Service Benefits Ease of use –Widely available, well understood technology –Simplifies network operations (OAM&P) Cost Effectiveness –Widespread use of Ethernet interface –Purchase bandwidth only when needed Flexibility –Single UNI can connect to multiple services Internet, VPN, Extranet supplier, Storage Provider –Bandwidth can be added in 1Mbps increments

5. 5 Metro Ethernet Services Overview v1.2 Let’s look at TDM and other L2 Services Inflexible Bandwidth Scalability Increasing non-Ethernet service bandwidth often requires: –New service (step function) T1  T3, FR  ATM –New hardware new interface or equipment –New service provisioning different protocols / technologies Often resulting in: –Oversubscribing to meet growing bandwidth needs OC-48 OC-12 OC-3 T3 T1 1.5M 45M 155M 622M 2.4G TDM hierarchy or L2 Service dictates bandwidth increments and technology Frame Relay POS ATM

6. 6 Metro Ethernet Services Overview v1.2 Ethernet Service Benefits over TDM/other L2 Services Flexible Bandwidth Scalability Increasing Ethernet service bandwidth: –Requires just bandwidth provisioning –Provision only amount of BW needed Same protocol for LAN and MAN Lower OpEx & CapEx with Ethernet –25-40% lower cost than TDM, Frame Relay, ATM interfaces 1 –10x lower cost than high speed SONET interfaces 1 –Easier and less costly to meet growing bandwidth needs OC-48 OC-12 OC-3 T3 T1 1.5M 45M 155M 622M 2.4G Ethernet provides flexible bandwidth increments using same technology Frame Relay POS ATM 1GbE 10/100MbE 1 Source: Network Strategy Partners, LLC Ethernet

7. 7 Metro Ethernet Services Overview v1.2 MEF Phase I Service Documents Phase I consists of 3 technical specifications –Ethernet Services Model (ESM - MEF 1.0 standard) Defines Ethernet service building blocks (service attributes) Defines a framework describing how to build an Ethernet service –does not define Ethernet services –Ethernet Services Definitions (ESD) Defines how to apply the ESM building blocks to create services Defines Ethernet Line (E-Line) and Ethernet LAN (E-LAN) service types and instances of them (EPL, EVPL, EIA, etc.) –Ethernet Traffic Management (ETM) Defines traffic management and service performance requirements to create CoS-based SLAs

8. 8 Metro Ethernet Services Overview v1.2 Relationship between MEF Phase I Service documents MEF 1.0 - Ethernet Service Model (ESM) (Ratified Sept. 2003) Ethernet Service Definitions (ESD) Ethernet Traffic Management (ETM)

9. 9 Metro Ethernet Services Overview v1.2 Ethernet Services Model (ESM) Ratified by MEF Tech. Committee - Sept. 2003 –into Technical Specification MEF 1.0 Defines building blocks for creating services Building blocks consist of Ethernet Service Attributes and Parameters defined for: –Ethernet UNI (User Network Interface) –Ethernet Virtual Circuit (EVC) MEF 1.0 defines the building blocks to create services

10. 10 Metro Ethernet Services Overview v1.2 How the MEF defines an Ethernet Service MEF 1.0 defines the Ethernet Service Definition Framework A service is defined via –Service Type –Service Attributes –Service Attribute Parameters Defined in ESD Defined in ESM (MEF 1.0) and ETM

11. 11 Metro Ethernet Services Overview v1.2 Ethernet Service – Basic Model defined in MEF 1.0 Customer Equipment (CE) attaches to UNI CE can be –router –IEEE 802.1Q bridge (switch) UNI (User Network Interface) –Standard IEEE 802.3 Ethernet PHY and MAC –10Mbps, 100Mbps, 1Gbps or 10Gbps Metro Ethernet Network (MEN) –May use different transport and service delivery technologies SONET/SDH, WDM, RPR, MAC-in-MAC, Q-in-Q, MPLS CE UNI Metro Ethernet Network (MEN) UNI

12. 12 Metro Ethernet Services Overview v1.2 Ethernet Service Type defined in ESD Ethernet Service Type –Generic Ethernet connectivity service construct Each Ethernet Service Type –has a set of Ethernet Service Attributes MEF has defined 2 Ethernet Service Types –Ethernet Line (E-Line) Service Provides Point-to-Point connectivity –Ethernet LAN (E-LAN) Service Provides Multipoint-to-Multipoint (Any-to-Any) connectivity Service Types are generic constructs used to create services

13. 13 Metro Ethernet Services Overview v1.2 UNI MEN UNI Point-to-Point EVC Ethernet Virtual Connection (EVC) defined in MEF 1.0 An EVC is “an instance of an association of 2 or more UNIs” EVCs help visualize the Ethernet connections –Like Frame Relay and ATM PVCs MEF has defined 2 EVC types –Point-to-Point –Multipoint-to-Multipoint EVCs help conceptualize the service connectivity MEN Multipoint-to-Multipoint EVC

14. 14 Metro Ethernet Services Overview v1.2 Ethernet Service Attributes defined in MEF 1.0, ESD and ETM Service Attributes define –the capabilities of the Ethernet Service Type Service Attributes defined for UNI and EVC: –Physical Interface –Bandwidth Profiles –Service Performance –Service Frame Delivery –Service Multiplexing –Etc…. Service Attributes define the service characteristics

15. UNI and EVC Service Attribute Details Service Attributes defined in MEF 1.0 Technical Specification

16. 16 Metro Ethernet Services Overview v1.2 EVC Service Attributes Service Attribute Service Attribute Parameters EVC TypePoint-to-Point or Multipoint-to-Multipoint UNI List A list of UNIs (identified via the UNI Identifier service attribute) used with the EVC CE-VLAN ID Preservation Yes or No. Specifies whether customer VLAN ID is preserved or not. CE-VLAN CoS Preservation Yes or No. Specifies whether customer VLAN CoS (802.1p) is preserved or not. Unicast Service Frame Delivery Specifies whether unicast frames are Discarded, Delivered Unconditionally or Delivered Conditionally Multicast Service Frame Delivery Specifies whether multicast frames are Discarded, Delivered Unconditionally or Delivered Conditionally Broadcast Service Frame Delivery Specifies whether broadcast frames are Discarded, Delivered Unconditionally or Delivered Conditionally Layer 2 Control Protocol Processing Discard or Tunnel per protocol Service Performance Specifies the Frame Delay, Frame Jitter and Frame Loss per EVC or frames within an EVC identified via their CE-VLAN CoS (802.1p) value

17. 17 Metro Ethernet Services Overview v1.2 UNI Service Attributes Service Attribute Service Attribute Parameters UNI IdentifierA string used to identity of a UNI, e.g., NYCBldg12Rm102Slot22Port3 Physical MediumStandard Ethernet PHY Speed10 Mbps, 100 Mbps, 1 Gbps or 10 Gbps ModeFull Duplex or Auto negotiation MAC LayerIEEE 802.3-2002 Service MultiplexingYes or No. Defines whether multiple services can be on the UNI UNI EVC IDA string used identify an EVC, e.g., NYCBldg1Rm102Slot22Port3EVC3 CE-VLAN ID / EVC MapMapping table of customer VLAN IDs to EVC Max. Number of EVCsThe maximum number of EVCs allowed per UNI Bundling No or Yes. Specifies that one or more customer VLAN IDs are mapped to an EVC at the UNI All to One BundlingNo or Yes (all customer VLAN IDs are mapped to an EVC at the UNI). Ingress Bandwidth Profile Per Ingress UNI None or. This Bandwidth profile applies to all frames across the UNI. Ingress Bandwidth Profile Per EVC None or. This Bandwidth profile applies to all frames over particular EVC. Ingress Bandwidth Profile Per CoS ID None or. This Bandwidth profile applies to all frames marked with a particular CoS ID over an EVC. Layer 2 Control Protocol Processing Discard, Peer or Pass to EVC per protocol

18. 18 Metro Ethernet Services Overview v1.2 E-Line and E-LAN Service Types defined in ESD E-Line Service used to create –Private Line Services –Ethernet Internet Access –Point-to-Point VPNs E-LAN Service used to create –Multipoint VPNs –Transparent LAN Service CE Point-to-Point EVC MEN UNI E-Line Service type CE MEN CE Multipoint-to-Multipoint EVC UNI E-LAN Service type

19. 19 Metro Ethernet Services Overview v1.2 Example Service using E-Line Service Type Ethernet Virtual Private Line –Supports Service Multiplexed UNI –Point-to-Point VPN for site interconnectivity CE MEN Ethernet UNI Service Multiplexed Ethernet UNI Point-to-Point EVCs CE FR CPE MEN FR UNI Point-to-Point FR PVCs Ethernet Virtual Private Line using E-Line Service type Frame Relay Analogy to E-Line Service FR CPE

20. 20 Metro Ethernet Services Overview v1.2 Example Service using E-Line Service Type Ethernet Private Line –Dedicated UNIs for Point-to-Point connections MEN Ethernet UNI Point-to-Point EVCs (dedicated BW) CE Ethernet Private Line using E-Line Service type Private Line Analogy to E-Line Service Internet ISP POP Storage SP Ethernet UNI MEN OC-3 DS1 Dedicated TDM circuits CE Internet ISP POP Storage SP DS3 CE

21. 21 Metro Ethernet Services Overview v1.2 Example Service using E-LAN Service Type Transparent LAN Service (TLS) provides –Intra-company Connectivity –Full transparency of control protocols (BPDUs) New VLANs added –without coordination with provider Multipoint-to- Multipoint EVC UNI 1 UNI 3 UNI 4 UNI 2 MEN VLANs Engineering VLANs Sales Customer Service Engineering VLANs Sales VLANs Sales Customer Service TLS makes the MEN look like a LAN Transparent LAN Service

22. 22 Metro Ethernet Services Overview v1.2 Ethernet SLAs Many Enterprise customers will not use Metro Ethernet services unless: –There are SLAs with performance assurances –There is availability of service to all critical locations Such enterprises will build private networks Critical SLA Service Attributes –Bandwidth Profile –Service Performance Enterprise customers require CoS-based SLAs with service performance assurances

23. 23 Metro Ethernet Services Overview v1.2 Bandwidth Profiles defined in ETM MEF has defined three bandwidth profiles –Ingress Bandwidth Profile Per Ingress UNI –Ingress Bandwidth Profile Per EVC –Ingress Bandwidth Profile Per CoS ID 4 parameters –CIR/CBS determines frame delivery per service level objectives –EIR/EBS determines amount of excess frame delivery allowed

24. 24 Metro Ethernet Services Overview v1.2 Three Types of Bandwidth Profiles defined in ETM UNI EVC 1 EVC 2 EVC 3 Ingress Bandwidth Profile Per Ingress UNI UNI EVC 1 EVC 2 EVC 3 Ingress Bandwidth Profile Per EVC 1 Ingress Bandwidth Profile Per EVC 2 Ingress Bandwidth Profile Per EVC 3 UNI EVC 1 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 EVC 2

25. 25 Metro Ethernet Services Overview v1.2 Service Performance (QoS) defined in ETM Service Performance Parameters –Availability –Frame Delay –Frame Jitter –Frame Loss Service performance level to delivery determined via: –Per CoS ID, e.g., 802.1p user priority per EVC –Per UNI (port), i.e., 1 CoS for all EVCs at UNI

26. 26 Metro Ethernet Services Overview v1.2 Example CoS-based Metro Ethernet SLA E-Line Service 4 Classes of Service CoS determined via 802.1p CoS ID Common type of SLA used with CoS-based IP VPNs Service Class Service Characteristics CoS ID Bandwidth Profile per EVC per CoS ID Service Performance Premium Real-time IP telephony or IP video applications 6, 7 CIR > 0 EIR = 0 Delay < 5ms Jitter < 1ms Loss < 0.01% Silver Bursty mission critical data applications requiring low loss and delay (e.g., Storage) 4, 5 CIR > 0 EIR ≤ UNI Speed Delay < 5ms Jitter = N/S Loss < 0.01% Bronze Bursty data applications requiring bandwidth assurances 3, 4 CIR > 0 EIR ≤ UNI Speed Delay < 15ms Jitter = N/S Loss < 0.1% Standard Best effort service 0, 1, 2 CIR=0 EIR=UNI speed Delay < 30ms Jitter = N/S Loss < 0.5%

27. 27 Metro Ethernet Services Overview v1.2 E-Line and E-LAN (Virtual and Private) Enabled Service over Ethernet Storage Video on Demand Internet Access Service Delivery Technology Ethernet over Fiber Ethernet over SONET/SDH Ethernet over RPR Ethernet over MPLS Ethernet over WDM Ethernet Connectivity Service IP VPN IP Telephony Summary of Metro Ethernet Services

28. 28 Metro Ethernet Services Overview v1.2 Summary Ethernet Services –Same Ethernet… just used in new way E-Line and E-LAN Service types create –broad range of point-to-point and multipoint services Ethernet Services Framework –Defines service attributes that define the service characteristics Ethernet Services need CoS-based SLAs –to increase Enterprise usage for mission critical apps

29. 29 Metro Ethernet Services Overview v1.2 References and Resources Metro Ethernet Services – A Technical Overview –http://www.metroethernetforum.org/metro-ethernet-services.pdf Bandwidth Profiles for Ethernet Services –http://www.metroethernetforum.org/PDFs/WhitePapers/Bandwidth-Profiles-for- Ethernet-Services.pdf MEF 1.0 “Ethernet Service Model, Phase 1” –http://www.metroethernetforum.org/PDFs/Standards/MEF-1.0.doc Metro Ethernet Services for Enterprises –http://www.metroethernetforum.org/businesscase_wp_092702f.pdf Business Case for Enterprise Metro Ethernet –http://www.metroethernetforum.org/presentations/Supercomm2003-Metro- Ethernet-Business-Case21.ppt Metro Ethernet Networks - A Technical Overview –http://www.metroethernetforum.org/PDFs/WhitePapers/meftechoverviewwhitepa per102903.pdf