1 © Copyright 2008 Turin Networks, Inc. All Rights Reserved Carrier Ethernet: The Next Generation...

11© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved

Carrier Ethernet: The Next Generation Network and

Service Delivery Technology

24 April 2008

Converged Services

Carrier Ethernet

Ralph SantitoroDirector of Carrier Ethernet Solutions

[email protected]

Carrier Days


About Turin NetworksAbout Turin Networks

A leading global provider of Carrier Ethernet solutions

For wireline and wireless network operators

Turin’s iConnect solutions address the real-world challenges of network operators

To increase network efficiency and capacity

To facilitate migration to Carrier Ethernet networks

Solutions deployed by more than 600 customers worldwide including:

Top five wireless network operators in U.S.

11 of the top 17 broadband Internet providers

Headquartered in Petaluma, CaliforniaR&D facilities in Boulder, Dallas, Boston, and Shanghai

Sales offices throughout the world.

www.TurinNetworks.comwww.TurinNetworks.com


ContentsContents

Network Segmentation

Fundamental Ethernet service components

Ethernet services and Ethernet access to IP services

Comparison between Ethernet L2 VPNs and IP VPNs

Why Ethernet L2 VPNs, EPL and EP-LAN services?

Ethernet/IP service delivery over PDH access networks


Network SegmentationNetwork Segmentation

IP Service NetworksIP Service NetworksAccess NetworksAccess Networks

• Active FiberActive Fiber• PONPON• HFC (Cable)HFC (Cable)• PDH (E1/E3)PDH (E1/E3)• DSLDSL• RAN (Wireless)RAN (Wireless)

Access NetworksAll Layer 1 technologies. Technologies well defined and deployed

IP Service Networks“Application/Service-aware” part of the network. Technologies well defined and deployed. All IP/MPLS

Metro/Aggregation NetworkWhat networking technology should be used? Carrier Ethernet

VoiceVoice

InternetInternet

IPTVIPTV VoDVoD

IP VPNIP VPN

Metro Edge / Metro Edge / Aggregation NetworkAggregation Network

?

Networking Technologies have been defined to solve specific issuesNetworking Technologies have been defined to solve specific issues

Transport/Transmission OrganizationTransport/Transmission Organization Services OrganizationServices Organization


Fundamental Ethernet Service Fundamental Ethernet Service ComponentsComponents

UNI (User-to-Network Interface)Physical interface/demarcation between service provider and subscriberService start/end point

NNI (Network-to-Network Interface)Demarcation/peering point

Between service providers (E-NNI)Between service provider internal networks (I-NNI)

Ethernet Virtual Connection (EVC)Logical representation of an Ethernet serviceDefined by association of 2 or more UNIs

E-NNI I-NNIAccess/Aggregation Access/Aggregation

NetworkNetwork

E-NNI Metro Transport / Metro Transport /

Core NetworkCore Network

Access/Aggregation Access/Aggregation

NetworkNetwork

UNI UNI

EVCEVC

Ethernet service components are independent of the Access Ethernet service components are independent of the Access or Transport Network technology used to delivery the serviceor Transport Network technology used to delivery the service


Example of Ethernet Service Delivery over Example of Ethernet Service Delivery over Different Access/Transport TechnologiesDifferent Access/Transport Technologies

PDH Access/Aggregation NetworkUNI1: PDH access network bonds 5 E1s for 10Mbps EoPDHE-NNI: 1Gbps Ethernet over Fiber (802.1ad / QinQ)

MPLS Transport Network802.1ad frames mapped to MPLS transport networkI-NNI: 1Gbps Ethernet over Fiber (802.1ad / QinQ)

Fiber Access NetworkUNI2: 10Mbps Ethernet over Fiber (EoF)

E-NNI

10Mbps EVC10Mbps EVC

I-NNIPDH (E1/T1) Access PDH (E1/T1) Access

Network ProviderNetwork Provider

E-NNIMPLS Transport MPLS Transport

NetworkNetwork

Fiber Access Fiber Access

NetworkNetwork

UNI2

PDH Access Network• EoPDH: 5 bonded E1sEoPDH: 5 bonded E1s

Fiber Access Network• Ethernet over Fiber (EoF)Ethernet over Fiber (EoF)

MPLS Transport Network• Ethernet over MPLSEthernet over MPLS

Ethernet Ethernet Service ProviderService Provider

UNI1

Subscriber is unaware of the various access and transport network Subscriber is unaware of the various access and transport network technologies used to deliver this 10Mbps Ethernet Servicetechnologies used to deliver this 10Mbps Ethernet Service


Comparison of Ethernet Connectivity Services Comparison of Ethernet Connectivity Services and Ethernet Access to IP Servicesand Ethernet Access to IP Services

Ethernet Connectivity ServicesMulti-site E-LAN

Ethernet Private LANTransparent LAN Service (L2 VPN)VPLS (L2 VPN)

Site-to-Site E-LineEthernet Private LineEthernet Virtual Private Line (L2 VPN)

E-LineE-Line

E-LANE-LAN

InternetInternet

VoIPVoIP

E-LineE-Line

Ethernet Access to IP Services

Provide Layer 2 connectivity to IP Service Networks

Ethernet access to Internet

Ethernet access to Managed VoIP service

Ethernet Connectivity Service: Layer 2 Service End-to-EndEthernet Connectivity Service: Layer 2 Service End-to-EndEthernet Access to IP Service: Layer 2 access to IP ServiceEthernet Access to IP Service: Layer 2 access to IP Service


Technical Comparison of Ethernet L2 VPN and IP Technical Comparison of Ethernet L2 VPN and IP VPN Services in Access NetworkVPN Services in Access Network

Ethernet L2 VPN Service• UNIUNI• EVC (service) identified via VLAN IDEVC (service) identified via VLAN ID• CoS identified via PCPCoS identified via PCP• Forwarding on MAC or VLAN IDForwarding on MAC or VLAN ID

IP VPN Service• PortPort• Service identified via IP addressService identified via IP address• CoS identified via DSCPCoS identified via DSCP• Forwarding on IP AddressForwarding on IP Address

Service AttributeService Attribute Ethernet ServiceEthernet Service IP ServiceIP Service

Customer Handoff Ethernet UNI Ethernet port (or PDH circuit)Service Identification VLAN ID / EVC IP AddressCoS Identification PCP (or DSCP/ToS mapped to PCP) DSCP/ToS

Packet/Frame Routing/Forwarding

MAC Address (E-LAN)VLAN ID (E-Line)

IP Address

Fault Management Link Trace, Continuity Check (L2 Ping), Loopbacks Traceroute, ICMP Ping

Performance Management

Frame Delay, Frame Delay Variation, Frame Loss Ratio, Service Availability

Packet Delay, Packet Delay Variation, Packet Loss

Service Service ProviderProvider

Fundamental difference between Ethernet and IP Services is the Fundamental difference between Ethernet and IP Services is the information used to identify, forward and process service frames information used to identify, forward and process service frames


Why Ethernet L2 VPNs, EPL and EP-LAN services?Why Ethernet L2 VPNs, EPL and EP-LAN services? - - Improved SecurityImproved Security

Enterprises don’t want Carriers to know or route their IP addresses for site-to-site interconnections (VPNs)

Ethernet enables Carrier’s network to transport and switch Enterprise IP traffic without interacting with it

EPL and EP-LAN services over NG-SDH provides enhanced information security

SDH’s circuit channelization coupled with LCAS diverse routes provide a data isolation and data ‘scrambling’ effect

Ideally suited for Financial verticals such as stock exchanges, banks and government market sectors

Mitigating Carrier Ethernet Security Risks: http://www.turinnetworks.com/html/TechBrief_Ethernet-Security.pdf


Why Carrier Ethernet for Metro/Aggregation Why Carrier Ethernet for Metro/Aggregation Networks ?Networks ?

Metro/Aggregation Network’s FunctionalityAggregate, switch and transport traffic from access network to IP service edge networksThis capability is ideally suited for Carrier Ethernet

Carrier Ethernet provides simpler and lower cost OAM than IP/MPLS

Only need to manage 1 layer versus 3 Layers with IP/MPLSAll performance and fault management accomplished via a single technology (Ethernet)

EthernetEthernet

MPLSMPLS

EthernetEthernet

IPIPFault ManagementFault ManagementPerformance ManagementPerformance Management

OpExOpEx OpExOpEx

1 Layer to 1 Layer to managemanage

3 3 Layers Layers

to to ManageManage


Converged Ethernet/IP Service Delivery over PDH Access Networks


Delivering Ubiquitous Ethernet ServicesDelivering Ubiquitous Ethernet Services- The Access Network Challenge- The Access Network Challenge

Ethernet over Fiber (EoF) access networksThe optimal technology for delivery of Ethernet services

Unfortunately, not all Enterprise sites have fiber accessHowever, they all have access to copper PDH circuits

Fiber (Off net)

Fiber (Off net)

Fiber(On net)

Fiber(On net)

Ethernet Ethernet Service Service ProviderProvider

How does a service provider deliver Ethernet How does a service provider deliver Ethernet services to all Enterprise locations?services to all Enterprise locations?


What is Ethernet over PDH (EoPDH)?What is Ethernet over PDH (EoPDH)?

Technology that enables delivery of Ethernet services over PDH (E1/DS1, E3/DS3) access networks

Service Bandwidth GranularityN x 2Mbps (N bonded E1s), N x 1.5Mbps (N bonded DS1s)N x 32Mbps (N bonded E3s), N x 45Mbps (N bonded DS3s)Example:

5 bonded E1s provide a 10Mbps Ethernet service3 bonded E3s provides ~100Mbps Ethernet service

Supports same service attributes as EoF servicesEthernet UNI to subscriberGranular bandwidth and QoS per serviceFault Management and Performance Management for SLAs

PDH (Plesiochronous Digital Hierarchy): Term to collectively refer to E1/E3 and DS1/DS3 copper access network circuits

EoPDH enables a common Ethernet service offering EoPDH enables a common Ethernet service offering and SLA over both copper and fiber access networksand SLA over both copper and fiber access networks


How does EoPDH work?How does EoPDH work?

Ethernet Frames enter EoPDH CLE and encapsulated into GFPEach C-VLAN ID can be used to identify a different service (EVC)

Access network multiplexes E1s/E3s into STM-n circuitsE1s/E3s in STM-n circuits terminated on EoPDH Aggregator

GFP terminated, Ethernet frames reconstructed

EoPDH Aggregator adds S-VLAN tag (QinQ) and passes Ethernet Service Frames

to Ethernet Transport Network or IP Service NetworkPreserves enterprise subscriber’s C-VLAN ID

Copper PDH Copper PDH Access NetworkAccess Network

EoPDHCLE

Ethernet Frame at UNI

ETHETH

IP

S-VLAN Tagged Ethernet Frame (EVC)

ETHETH

IP

Enterprise Enterprise SubscriberSubscriber

Ethernet Ethernet Transport or Transport or

IP Service IP Service NetworkNetwork

Channelized STM-n

IPETHETHGFPGFP

Bonded E1s/E3s

IPETHETHGFPGFP

EoPDHEoPDHAggregatorAggregator

Copper PDH Copper PDH Access NetworkAccess Network


Ethernet L2 Services and Ethernet Access to IP Ethernet L2 Services and Ethernet Access to IP Services over E1s PDH circuits: PMOServices over E1s PDH circuits: PMO

CE

Ethernetover E1s

Ethernet handoff to customer

Customer Premise

Ethernet Ethernet

Ethernet over E1s or E1s in STM-n

L2switch

PERouter

IP Service Edge

DCS


TDM

EoPDH CLE

PDH Aggregation

Router

SDHADM

Local Switching Office (POP)

SD

H

SDHADM

PDH/SDHPDH/SDHAccess NetworkAccess Network

TDM PDH circuits from Customer Premise to IP Service EdgeTDM PDH circuits from Customer Premise to IP Service Edge


FMO Step 1 in Transport Network Evolution to FMO Step 1 in Transport Network Evolution to Carrier EthernetCarrier Ethernet

CE

Ethernetover E1s


Customer Premise

Ethernet overE1s or E1s in

STMn


SD

H

EoPDH CLE

Ethernet Ethernet

L2switch

PERouter

IP Service Edge

DCS


PDH Aggregation

Router

Ethernet over SDH

Carrier E

thern

et

EoPDH aggregator terminates PDH/SDH circuits and provides Ethernet to backhaul network resulting in improved bandwidth utilizationDCS and PDH Aggregation Router eliminated at IP Service Edge since PDH circuits terminated at LSO

TDM

SDHADM

SDHADM

Ethernet

PERouter

IP Service Edge

L2switch


Ethernet



Eth

erne

t

FMO Step 2 in Transport Network Evolution to FMO Step 2 in Transport Network Evolution to Carrier EthernetCarrier Ethernet

CE

Ethernetover E1s


Customer Premise

Ethernet overE1s or E1s in

STMn


EoPDH CLE C

arrier Eth

ernet

SDH ADMs / Transport replaced by Ethernet TransportShortest possible Ethernet over E1 (PDH) loopsCLE at customer premise enables converged Ethernet and IP services

TDM

Ethernet

PERouter

IP Service Edge

L2switch

SD

H

Ethernet over SDH

SDHADM

SDHADM

Ethernet

ManagedManagedCLECLE

Converged Services• Ethernet L2 VPNs

• EVPL and E-LAN• Ethernet access to Internet• Ethernet access to VoIP


Local switching of locally attached subscribers reduces backhaul bandwidthLocal switching of locally attached subscribers reduces backhaul bandwidth



Ethernet over PDH BenefitsEthernet over PDH Benefits

Simplifies Enterprise subscriber’s WAN connectivity

Provides “IT friendly” Ethernet (UNI) instead of E1 TDM circuit

Simplifies Provider’s Access/Aggregation Network

Reduces backhaul bandwidth requirements

By terminating TDM PDH circuits as close to subscriber as possible

Through statistical multiplexing and local switching

EoPDH enables ubiquitous, global EoPDH enables ubiquitous, global Ethernet services for off-net subscribersEthernet services for off-net subscribers


SummarySummary

Ethernet Services can be:Private Line Replacement (EPL)Private LAN (EP-LAN)Layer 2 Connectivity Service (E-Line or E-LAN L2 VPN)Layer 2 access connection to an IP Service (Internet, VoIP, etc.)

Carrier Ethernet is the best technology to use in the metro/aggregation network

Because this part of the network need not be “IP aware”Because it is simpler and lower cost than using IP/MPLS

Carrier Ethernet and IP/MPLS can both have their place in the network

Each plays a different role in the different parts of the network

Carrier Ethernet enables the delivery of the broadest range of services Carrier Ethernet enables the delivery of the broadest range of services while providing the lowest cost metro aggregation network infrastructurewhile providing the lowest cost metro aggregation network infrastructure


Recommended ReadingRecommended Reading

Metro Ethernet Services – A Technical Overviewhttp://www.metroethernetforum.org/PDF_Documents/metro-ethernet-services.pdf

Delivering Global Ethernet Serviceshttp://www.turinnetworks.com/html/TechBrief_Global-Ethernet.pdf

Mitigating Carrier Ethernet Security Riskshttp://www.turinnetworks.com/html/TechBrief_Ethernet-Security.pdf

Leveraging GMPLS to deliver end-to-end Ethernet serviceshttp://www.turinnetworks.com/html/TechBrief_Leveraging_GMPLS.pdf

“Carrier Ethernet Deployment Faces Challenges, Opportunities”http://lw.pennnet.com/display_article/308790/13/ARTCL/none/none/Carrier-Ethernet-deployment-faces-challenges,-opportunities/

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