Metro Ethernet Services what buyers need to understand

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

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 2 Metro Ethernet Services Overview v 1. 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 3 Metro Ethernet Services Overview v 1. 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 1 Mbps increments 4 Metro Ethernet Services Overview v 1. 2

Let’s look at TDM and other L 2 Services Inflexible Bandwidth Scalability • Increasing non-Ethernet service bandwidth often requires: – New service (step function) • T 1 T 3, FR ATM OC-48 TDM hierarchy or L 2 Service dictates bandwidth increments and technology POS OC-12 – New hardware • new interface or equipment OC-3 – New service provisioning • different protocols / technologies • Often resulting in: – Oversubscribing to meet growing bandwidth needs ATM T 3 T 1 1. 5 M Frame Relay 45 M 155 M 622 M 5 Metro Ethernet Services Overview v 1. 2 2. 4 G

Ethernet Service Benefits over TDM/other L 2 Services Flexible Bandwidth Scalability • Increasing Ethernet service bandwidth: OC-48 – Requires just bandwidth provisioning – Provision only amount of BW needed • Same protocol for LAN and MAN • Lower Op. Ex & Cap. Ex with Ethernet – 25 -40% lower cost than 1 Gb. E POS OC-12 OC-3 10/100 Mb. E • TDM, Frame Relay, ATM interfaces 1 Ethernet provides flexible bandwidth increments using same technology ATM Etherne t T 3 – 10 x lower cost • than high speed SONET interfaces 1 – Easier and less costly to meet growing bandwidth needs 1 T 1 1. 5 M Source: Network Strategy Partners, LLC Metro Ethernet Services Overview v 1. 2 Frame Relay 45 M 155 M 622 M 6 2. 4 G

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 Co. S-based SLAs 7 Metro Ethernet Services Overview v 1. 2

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) 8 Metro Ethernet Services Overview v 1. 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 9 Metro Ethernet Services Overview v 1. 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 Metro Ethernet Services Overview v 1. 2 Defined in ESM (MEF 1. 0) and ETM 10

Ethernet Service – Basic Model defined in MEF 1. 0 • Customer Equipment (CE) attaches to UNI • CE can be – router – IEEE 802. 1 Q bridge (switch) • UNI (User Network Interface) – Standard IEEE 802. 3 Ethernet PHY and MAC – 10 Mbps, 100 Mbps, 1 Gbps or 10 Gbps • Metro Ethernet Network (MEN) CE Metro Ethernet Network (MEN) UNI CE – May use different transport and service delivery technologies • SONET/SDH, WDM, RPR, MAC-in-MAC, Q-in-Q, MPLS 11 Metro Ethernet Services Overview v 1. 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 12 Metro Ethernet Services Overview v 1. 2

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 Point-to-Point EVC UNI MEN UNI Multipoint-to-Multipoint EVCs help conceptualize the service connectivity 13 Metro Ethernet Services Overview v 1. 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 14 Metro Ethernet Services Overview v 1. 2

UNI and EVC Service Attribute Details Service Attributes defined in MEF 1. 0 Technical Specification

EVC Service Attributes Service Attribute Parameters EVC Type Point-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 Co. S Preservation Yes or No. Specifies whether customer VLAN Co. S (802. 1 p) 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. Metro Frame Delay, Jitter and Frame Loss per EVC or Ethernet Services Frame Overview v 1. 2 frames within an EVC identified via their CE-VLAN Co. S (802. 1 p) value 16

UNI Service Attributes Service Attribute Parameters UNI Identifier A string used to identity of a UNI, e. g. , NYCBldg 12 Rm 102 Slot 22 Port 3 Physical Medium Standard Ethernet PHY Speed 10 Mbps, 100 Mbps, 1 Gbps or 10 Gbps Mode Full Duplex or Auto negotiation MAC Layer IEEE 802. 3 -2002 Service Multiplexing Yes or No. Defines whether multiple services can be on the UNI EVC ID A string used identify an EVC, e. g. , NYCBldg 1 Rm 102 Slot 22 Port 3 EVC 3 CE-VLAN ID / EVC Mapping table of customer VLAN IDs to EVC Max. Number of EVCs The 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 Bundling No or Yes (all customer VLAN IDs are mapped to an EVC at the UNI). Ingress Bandwidth Profile Per Ingress UNI None or <CIR, CBS, EIR, EBS>. This Bandwidth profile applies to all frames across the UNI. Ingress Bandwidth Profile Per EVC None or <CIR, CBS, EIR, EBS>. This Bandwidth profile applies to all frames over particular EVC. Ingress Bandwidth Profile Per Co. S ID None or <CIR, CBS, EIR, EBS>. This Bandwidth profile applies to all frames marked with a particular Co. S ID over an EVC. Layer 2 Control Protocol Processing 17 Metro Ethernet Services Overview v 1. 2 Discard, Peer or Pass to EVC per protocol

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 CE UNI MEN CE UNI E-Line Service type Multipoint-to-Multipoint EVC • E-LAN Service used to create – Multipoint VPNs – Transparent LAN Service UNI CE CE UNI CE MEN UNI CE E-LAN Service type Metro Ethernet Services Overview v 1. 2 18

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 Ethernet Service UNI Multiplexed Ethernet UNI CE MEN CE CE Point-to-Point FR PVCs FR UNI FR CPE Ethernet UNI Ethernet Virtual Private Line using E-Line Service type FR CPE MEN FR CPE FR UNI Frame Relay Analogy to E-Line Service 19 Metro Ethernet Services Overview v 1. 2

Example Service using E-Line Service Type • Ethernet Private Line – Dedicated UNIs for Point-to-Point connections Ethernet UNI CE Ethernet UNI Dedicated TDM circuits Storage SP Point-to-Point EVCs (dedicated BW) Ethernet UNI OC-3 DS 1 CE MEN Ethernet UNI Storage SP ISP POP CE MEN CE Internet Ethernet Private Line using E-Line Service type CE ISP POP DS 3 OC-3 CE Internet Private Line Analogy to E-Line Service 20 Metro Ethernet Services Overview v 1. 2

Example Service using E-LAN Service Type • Transparent LAN Service (TLS) provides Transparent LAN Service VLANs Sales Customer Service Engineering – Intra-company Connectivity – Full transparency of control protocols (BPDUs) • New VLANs added – without coordination with provider TLS makes the MEN look like a LAN UNI 1 Multipoint-to. Multipoint EVC UNI 2 VLANs Sales Customer Service MEN UNI VLANs 3 Engineering UNI 4 VLANs Sales 21 Metro Ethernet Services Overview v 1. 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 Co. S-based SLAs with service performance assurances 22 Metro Ethernet Services Overview v 1. 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 Co. S 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 23 Metro Ethernet Services Overview v 1. 2

Three Types of Bandwidth Profiles defined in ETM EVC 1 UNI EVC 2 Ingress Bandwidth Profile Per Ingress UNI EVC 3 UNI EVC 1 EVC 2 Ingress Bandwidth Profile Per EVC 1 Ingress Bandwidth Profile Per EVC 2 EVC 3 Ingress Bandwidth Profile Per EVC 3 EVC 1 CE-VLAN Co. S 6 Ingress Bandwidth Profile Per Co. S ID 6 CE-VLAN Co. S 4 Ingress Bandwidth Profile Per Co. S ID 4 CE-VLAN Co. S 2 Ingress Bandwidth Profile Per Co. S ID 2 EVC 2 24 Metro Ethernet Services Overview v 1. 2

Service Performance (Qo. S) defined in ETM • Service Performance Parameters – – Availability Frame Delay Frame Jitter Frame Loss • Service performance level to delivery determined via: – Per Co. S ID, e. g. , 802. 1 p user priority per EVC – Per UNI (port), i. e. , 1 Co. S for all EVCs at UNI 25 Metro Ethernet Services Overview v 1. 2

Example Co. S-based Metro Ethernet SLA • • Service Class Service Characteristics Bronze Co. S ID Bandwidth Profile per EVC per Co. S ID 6, 7 CIR > 0 EIR = 0 Bursty mission critical data applications requiring low loss and delay (e. g. , Storage) 4, 5 CIR > 0 EIR ≤ UNI Speed Bursty data applications requiring bandwidth assurances 3, 4 CIR > 0 EIR ≤ UNI Speed 0, 1, 2 CIR=0 EIR=UNI speed IP telephony or IP Premium Real-time video applications Silver E-Line Service 4 Classes of Service Co. S determined via 802. 1 p Co. S ID Common type of SLA used with Co. S-based IP VPNs Standard Best effort service Metro Ethernet Services Overview v 1. 2 Service Performance Delay < 5 ms Jitter < 1 ms Loss < 0. 01% Delay < 5 ms Jitter = N/S Loss < 0. 01% Delay < 15 ms Jitter = N/S Loss < 0. 1% Delay < 30 ms Jitter =26 N/S Loss < 0. 5%

Summary of Metro Ethernet Services Enabled Service over Ethernet Connectivity Service Delivery Technology Storage Internet Access IP VPN IP Telephony Video on Demand E-Line and E-LAN (Virtual and Private) Ethernet over Fiber SONET/SDH Ethernet over RPR Ethernet over MPLS over WDM 27 Metro Ethernet Services Overview v 1. 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 Co. S-based SLAs – to increase Enterprise usage for mission critical apps 28 Metro Ethernet Services Overview v 1. 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/White. Papers/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_092702 f. pdf • Business Case for Enterprise Metro Ethernet – http: //www. metroethernetforum. org/presentations/Supercomm 2003 -Metro. Ethernet-Business-Case 21. ppt • Metro Ethernet Networks - A Technical Overview – http: //www. metroethernetforum. org/PDFs/White. Papers/meftechoverviewwhitepa per 102903. pdf 29 Metro Ethernet Services Overview v 1. 2