1 / 29

Understanding Metro Ethernet Services: A Guide for Buyers and Providers

This overview provides an understanding of Metro Ethernet services, including their origins, benefits, service documents, and service types. It also explores the flexibility and cost-effectiveness of Ethernet compared to other L2 services.

carolyna
Download Presentation

Understanding Metro Ethernet Services: A Guide for Buyers and Providers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

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

  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 Metro Ethernet Services Overview v1.2

  3. 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 Metro Ethernet Services Overview v1.2

  4. 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 Metro Ethernet Services Overview v1.2

  5. Let’s look at TDM and other L2 Services TDM hierarchy or L2 Service dictates bandwidth increments and technology 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 POS ATM Frame Relay 1.5M 45M 155M 622M 2.4G Metro Ethernet Services Overview v1.2

  6. Ethernet Service Benefits over TDM/other L2 Services Ethernet provides flexible bandwidth increments using same technology 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 interfaces1 • 10x lower cost • than high speed SONET interfaces1 • Easier and less costly to meet growing bandwidth needs OC-48 OC-12 OC-3 T3 T1 1GbE 10/100MbE POS ATM Ethernet Frame Relay 1.5M 45M 155M 622M 2.4G 1 Source: Network Strategy Partners, LLC Metro Ethernet Services Overview v1.2

  7. 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 Metro Ethernet Services Overview v1.2

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

  9. 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 Metro Ethernet Services Overview v1.2

  10. 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 Defined in ESM (MEF 1.0) and ETM Metro Ethernet Services Overview v1.2

  11. 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) CE UNI CE Metro Ethernet Services Overview v1.2

  12. 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 Metro Ethernet Services Overview v1.2

  13. Point-to-Point EVC MEN UNI UNI 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 MEN Multipoint-to-Multipoint EVC EVCs help conceptualize the service connectivity Metro Ethernet Services Overview v1.2

  14. 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 Metro Ethernet Services Overview v1.2

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

  16. EVC Service Attributes Metro Ethernet Services Overview v1.2

  17. UNI Service Attributes Metro Ethernet Services Overview v1.2

  18. E-Line and E-LAN Service Types defined in ESD Point-to-Point EVC • 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 UNI MEN CE UNI E-Line Service type Multipoint-to-Multipoint EVC UNI UNI CE CE MEN UNI CE CE UNI E-LAN Service type Metro Ethernet Services Overview v1.2

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

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

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

  22. 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 Metro Ethernet Services Overview v1.2

  23. 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, EIR, EBS> • CIR/CBS determines frame delivery per service level objectives • EIR/EBS determines amount of excess frame delivery allowed Metro Ethernet Services Overview v1.2

  24. Three Types of Bandwidth Profiles defined in ETM EVC1 EVC1 Ingress Bandwidth Profile Per EVC1 EVC2 EVC2 Ingress Bandwidth Profile Per Ingress UNI UNI Ingress Bandwidth Profile Per EVC2 UNI EVC3 EVC3 Ingress Bandwidth Profile Per EVC3 CE-VLAN CoS 6 CE-VLAN CoS 4 Ingress Bandwidth Profile Per CoS ID 6 EVC1 CE-VLAN CoS 2 Ingress Bandwidth Profile Per CoS ID 4 UNI Ingress Bandwidth Profile Per CoS ID 2 EVC2 Metro Ethernet Services Overview v1.2

  25. 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 Metro Ethernet Services Overview v1.2

  26. 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 Metro Ethernet Services Overview v1.2

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

  28. 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 Metro Ethernet Services Overview v1.2

  29. 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/meftechoverviewwhitepaper102903.pdf Metro Ethernet Services Overview v1.2

More Related