Introduction to Ethernet Services

Moderator and Panelists

Ralph SantitoroDirector of Carrier Ethernet SolutionsTurin NetworksMEF Director & Co-chair Security GroupRalph@Marcom-Services.net

Arie GoldbergCEO and Chief TechnologistOmnitron Systems MEF Director and Secretaryagoldberg@omnitron-systems.com

Brian BortzCEOResolute Networksbrianb@ResoluteNetworks.com

Paul IndooProduct Marketing Manager Nortelpin@nortel.com

3

Agenda

• Carrier Ethernet Terminology– UNI, NNI– Ethernet Virtual Connections (EVCs)– E-Line, E-LAN and E-Tree Services Types

• Ethernet Service Definitions– EPL and EVPL– EP-LAN and EVP-LAN– EP-Tree and EVP-Tree

• Ethernet Service Attributes– EVC and UNI Service Attributes– Bandwidth Profiles– Traffic Management

• Ethernet Service Application Examples

Introduction

Ralph Santitoro - Moderator

5

Carrier Ethernet Terminology

• User to Network Interface (UNI)– Physical interface/demarcation between service

provider/Cable Operator/Carrier/ and subscriber

• Ethernet Virtual Connection (EVC)– Logical representation of an Ethernet service as defined

by the associate between 2 or more UNIs

• Network to Network Interface (NNI)– Demarcation between carrier Ethernet networks operated

by one or more carriers

UNI, EVC and NNI are the Fundamental Constructs of an Ethernet ServiceUNI, EVC and NNI are the Fundamental Constructs of an Ethernet Service

6

Service provider responsibilityUNIUNI

Carrier Ethernet Network

MEF Carrier Ethernet Terminology- User to Network Interface (UNI)

• Ethernet service demarcation point– between customer (subscriber)

and service provider

• Physical Ethernet Interface operating at: – 10Mbps– 100Mbps– 1Gbps– 10Gbps

CECE

customer responsibility

7

MEF Carrier Ethernet Terminology - Ethernet Virtual Connection (EVC)

• An Ethernet Service Instantiation– Most commonly identified via 802.1ad S-VLAN ID

• Connects two or more subscriber sites (UNIs)– Can multiplex multiple EVCs on the same UNI

• Three types of EVCs defined by MEF– Point-to-Point– Multipoint-to-Multipoint– Rooted Multipoint (Point-to-Multipoint)

8

MEF Ethernet Service Definition Framework

• Ethernet Service Type– Categorizes the service based on its EVC type

• Point-to-Point, Multipoint-to-Multipoint or Rooted Multipoint Ethernet Service Attributes and Parameters

• Ethernet Service Attributes– Specifies the UNI & EVC requirements for each Ethernet Service Type

The MEF defines Ethernet Services using this FrameworkThe MEF defines Ethernet Services using this Framework

9

Carrier Ethernet: Three Ethernet Service Types

• E-Line Service Type– Ethernet Private Lines– Virtual Private Lines (site-to-site Layer 2 VPNs)– Ethernet Internet Access

• E-LAN Service Type– Multi-site Layer 2 VPNs– Transparent LAN Service

• E-Tree Service Type– Point-to-Multipoint Infrastructure– Triple play backhaul– Cell sites backhauled to mobile switching center

10

MEF Ethernet Service Definition Classification

Service TypeService Type Port-BasedPort-Based(All-to-One Bundling)(All-to-One Bundling)

VLAN-BasedVLAN-Based(Service Multiplexed)(Service Multiplexed)

E-LineE-Line(Point-to-Point EVC)(Point-to-Point EVC)

Ethernet Private LineEthernet Private Line(EPL)(EPL)

Ethernet Virtual Private LineEthernet Virtual Private Line(EVPL)(EVPL)

E-LANE-LAN (multipoint-to-multipoint (multipoint-to-multipoint

EVC)EVC)

Ethernet Private LANEthernet Private LAN(EP-LAN)(EP-LAN)

Ethernet Virtual Private LANEthernet Virtual Private LAN(EVP-LAN)(EVP-LAN)

E-TreeE-Tree(rooted multipoint EVC)(rooted multipoint EVC)

Ethernet Private TreeEthernet Private Tree(EP-Tree)(EP-Tree)

Ethernet Virtual Private TreeEthernet Virtual Private Tree(EVP-Tree)(EVP-Tree)

• MEF Services are classified into two categories:– Port-based

• Single Service Instance per UNI (dedicated network resource)– VLAN-based

• Multiple Service Instances per UNI (shared network resource)

Service Definitions

Brian Bortz

12

Services Using E-Line Service Type

• Ethernet Private Line (EPL)– Replaces a TDM Private line– Port-based service with single service (EVC) across

dedicated UNIs providing site-to-site connectivity– Typically delivered over SDH (Ethernet over SDH)– Most popular Ethernet service due to its simplicity

Point-to-Point EVCs

Carrier Ethernet Network

CECE UNIUNI

CECEUNIUNI

CECE

UNIUNI

ISPPOP

UNIUNI

Storage Service Provider

Internet

13

Services Using E-Line Service Type

• Ethernet Virtual Private Line (EVPL)– Replaces Frame Relay or ATM L2 VPN services

• To deliver higher bandwidth, end-to-end services– Enables multiple services (EVCs) to be delivered over single physical

connection (UNI) to customer premises– Supports “hub and spoke” connectivity via Service Multiplexed UNI at

hub site• Similar to Frame Relay or Private Line hub and spoke deployments

Service Multiplexed

Ethernet UNI

Point-to-Point EVCs

Carrier Ethernet Network

CECE

UNIUNI

CECE

UNIUNI

CECE

UNIUNI

14

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

Multipoint-to-Multipoint EVC

Carrier Ethernet Network

CECEUNIUNI

UNIUNI

CECE

CECE

UNIUNI

Ethernet Private LAN example

15

Services Using E-Tree Service Type

• Ethernet Private Tree (EP-Tree) and Ethernet Virtual Private Tree (EVP-Tree) Services– Enables Point-to-Multipoint Services with less provisioning

than using EVPLs for large hub & spoke deployments• Provides traffic separation between users (Leaf UNIs)• Each “Leaf” UNI interchanged with “Root” UNI(s)• No exchange of traffic between “Leaf” UNIs

Root

Carrier Ethernet Network

CECEUNIUNI

UNIUNI

UNIUNI

CECE

CECE

Leaf

Leaf

UNIUNI

CECE

Leaf

Rooted-Multipoint EVC

Ethernet Private Tree example

Service Attributes

Arie Goldberg

17

Service Attributes

• EVC Service Attributes– Details regarding the EVC including:

• Bandwidth profiles• CoS Identification• Service Performance

– Frame Delay (Latency)– Frame Delay Variation (Jitter)– Frame Loss Ratio

• UNI Service Attributes– Details regarding the UNI including:

• Physical interface capabilities• Service multiplexing capability• C-VLAN bundling capability

18

EVC Service Attributes

Bandwidth Profiles per EVC (service) and per CoS– CIR (Committed Information Rate)

• CIR assured via Bandwidth Reservation and Traffic Engineering

– EIR (Excess Information Rate)

• EIR bandwidth is considered ‘excess’

• Traffic dropped at congestion points in the network

– CBS/EBS (Committed/Excess Burst Size)

• Higher burst size results in improved performance

EVC-1

CIR

EIREVC-2

CIR

EIR

EVC-3

CIR

EIR

UNIEVC 1

CoS 61Mbps CIR for VoIP

CoS 26Mbps CIR for VPN data traffic

3Mbps for Internet AccessEVC 2

10Mbps UNI

(port)

BWPs can divide bandwidth per EVC (service) over a single UNI

– Multiple services over same port (UNI)– CoS markings enable the network to

determine the network QoS to provide

CIR defines the assured bandwidth CIR defines the assured bandwidth EIR improves the network’s Goodput EIR improves the network’s Goodput

Ethernet Service Application Examples

Paul Indoo

20

Ethernet Private Line (EPL) Example

• Simple configuration– Port to the Internet is “un-trusted”– Port to the branches is “trusted”– No coordination between

Enterprise and Service Provider• for Enterprise to Headquarters

(HQ) to Branch Subnets

• Bandwidth Profile options– Flexible options to offer full line

rate or sub-rate services– Example:

• 10Mbps Ethernet UNI– 10Mbps CIR (line rate) or

– 5Mbps CIR (sub-rate)HQ

Branch

Branch

EPLEPL

Internet

Firewall

EPL

21

Ethernet Virtual Private Line (EVPL) Example

ISPCustomer 1

Internet Service Provider (ISP)

ISPCustomer 2

ISPCustomer 3

Service Multiplexed UNI

VLANVLAN 2000 2000 Blue BlueVLANVLAN 2000 2000 Yellow Yellow

VLANVLAN 2000 2000 Green Green

VLAN 178 VLAN 178 Blue BlueVLAN 179 VLAN 179 Yellow YellowVLAN 180 VLAN 180 Green Green

• Efficient use of ISP router ports• Easy configuration at ISP customer sites

• This port and VLAN 2000 (or even untagged) to ISP

22

Ethernet Virtual Private LAN (EVP-LAN) Example

Credit Card Processor

Retailer A

Retailer B

• Redundant points of access for critical availability of Credit Card Processor service

• Multipoint-to-Multipoint service supporting LAN Extension

• Retailer A and B traffic isolated from each other over separate EVCs

Service Multiplexing

A

BD

EVC1

C

EVC2

23

Ethernet Private Tree (EP-Tree) Example

A

B

C

D

EVC1

Internet Service Provider (ISP)

Residential Customer A

Root

Leaves

• Efficient use of ISP’s router port

• Simple configuration for each Customer

• Customer’s can’t see each other’s traffic

• Second Root would provide redundant Internet access

Residential Customer B

Residential Customer C

24

Ethernet Virtual Private Tree (EVP-Tree) Example

A

B

C

D

EVC1

Internet Service

Provider (ISP)

Hotel Customer A

RootLeaves

Hotel Customer C

Hotel Customer B

• Efficient distribution of News video to Hotel Customers

• Hotel Customers can’t see each other’s traffic, Newscast Video Provider and ISP can’t see each other’s traffic

• Second Root could be added to provide redundant Internet access connections

• Some limits on what routing protocols can be used

Newscast Video Provider

LeavesService Multiplexing

25

Q & A

Ralph SantitoroDirector of Carrier Ethernet SolutionsTurin NetworksMEF Director & Co-chair Security GroupRalph@Marcom-Services.net

Arie GoldbergCEO and Chief TechnologistOmnitron Systems MEF Director and Secretaryagoldberg@omnitron-systems.com

Brian BortzCEOResolute Networksbrianb@ResoluteNetworks.com

Paul IndooProduct Marketing Manager Nortelpin@nortel.com

For more information regarding joining the MEF:Visit: www.metroethernetforum.org

Email us at: manager@metroethernetforum.org

Call us at: +1.310.258.8032 (California, USA)

For in-depth presentations of Carrier Ethernet for business, Ethernet services, technical overview, certification program etc., visit: www.metroethernetforum.org/presentations