Connection-oriented

Ethernet (COE)

Combining the Reliability, Performance, and Security of

SONET with the Flexibility and Efficiency of Ethernet

Topics

Just what is connection-oriented Ethernet (COE) anyway?

Fundamental attributes

Key technologies

Basic value proposition

The value of integrating COE with optical networking

Packet Optical Networking

How is COE creating business opportunities in metro

networks?

Mobile backhaul

DSLAM backhaul

Wholesale and retail Ethernet services

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Connection-Oriented Ethernet:

Carrier Ethernet with Traffic Engineering

Explicit forwarding of

Ethernet connections &

tunnels

Forward on tags

vs. connectionless MAC

address learning and

flooding

vs. Layer 1 forwarding

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EVC1

EVC2

EVC3

• Scheduler sees each EVC

• Deterministic performance

Connection-oriented

Ethernet

Per flow queuing

Shared

priority queue

EVC1EVC2EVC3

• Scheduler sees the Queue

• Statistical performance

?

Traditional

Ethernet “switching”

Priority queuing

Explicit data path

Connection-oriented

Ethernet

“magic”

Plug n’ play

Traditional

Ethernet “switching”

Resource reservation and admission control

For each CoS instance, EVC, tunnel

Per-flow queuing / traffic engineering

vs. simple priority queuing

Attributes of Connection-oriented Ethernet

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Network Protection• G.8031 50ms EVC Protection

•802.3ad UNI & ENNI Protection

Ethernet OAM• 802.3ah Link Fault Management

•Y.1731 Service Fault Management

Scalability•Layer 2 Aggregation

•Statistical Multiplexing

•Tag Swapping/Reuse

Deterministic QoS• Lowest Delay, Delay Variation, Loss

• Bandwidth Resource Reservation

• Connection Admission Control

COE

Attributes

Standardized Services• MEF 6.1 EPL, EVPL Services

• MEF 10.2 Service Attributes

Security• Bridging disabled-MAC DoS attacks mitigated

• Completely Layer 2 - no IP vulnerabilities

Connection-oriented Ethernet: More than just a protocol…

The Best of Both Worlds

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Connectionless 802.1 Ethernet

Bridging

• No Aggregation /Stat Muxing

• Deterministic QoS

• Short (<50ms) protection times

• Security

• Good Aggregation / Stat Muxing

• Non-deterministic QoS

• Long (>200ms) protection times

Connection-Oriented

Ethernet• Ethernet aggregation and stat muxing

• Highest EVC quality

• 50ms protection speed

• Precision OAM

• Security

Packet

ONP

MSPP

Eth

MSPP

MSPP

Eth

Eth

Eth

Ethernet over SONET/WDM

Eth

Eth

Eth

SONET quality, security, availability – Ethernet flexibility and efficiency

Connection-Oriented Ethernet (COE)

NGN Metro Infrastructure and Ethernet Services

First general purpose Ethernet Infrastructure

A single investment for all applications

Deterministic foundation

Ethernet aggregation for efficiency

High-value Ethernet connectivity

and backhaul services

Key applications

Mobile Backhaul

Enterprise site to site services

Retail Ethernet access services

Wholesale interconnection services

DSLAM Backhaul

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EnterpriseMobility

Residence, MTU

Metro

E-LAN office

Video

MTSOVHO

Web

Service Edges

Enterprise

COE does for Ethernet

what SONET did for DS1/DS3

Mobility

Connection-Oriented

Ethernet Infrastructure

VoIPWebL2 VPN L3 VPN Web

IP services

PoP

End users

COE is the foundation of Metro NGN Networks / Services

Ethernet-Centric COE

Simplest COE for Metro

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Three Layers to manage

Ethernet, MPLS PW, MPLS LSP

Multiple OAM methods

Complex protection

One Layer to manage

Ethernet

Scalable through reusable tags

One OAM method (802.1ag/Y.1731)

One protection method (G.8031)

Management plane approach

Ethernet-centric COE results in simplest and lowest cost metro operations

MPLS-centric COE

Eth Eth

Ethernet-centric COE

S/C tag tunnel Eth MPLS LSPPW PW

Static PW T-MPLS MPLS-TP IP/MPLS

IP controlplane

Mgmt plane

Eth

Mgmt plane

Packet Optical Networking:

Integrating COE and Layer 1 Optical Networking

COE + complete layer 1 networking

SONET, PDH, OTN, Lambda, Ethernet

Provisioned connections vs. dynamic IP

control plane

Brownfield optical network is an

asset

~100,000 nodes can feed COE services

Builds the NGN network

More than a „transition‟ investment

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“Open Platform” implementation

Pluggable open /interworking environment

Vs. discrete functions that live under a specific technology “roof”

• Like packet on a blade in a ROADM

Widest range of application and flexibility in network evolution

COE and TDM

Switching

fabric

OTN/Wave

Transport

TDM

network

Ethernet

networks

Example Packet ONP

“Open-platform” Implementation

Joining the Existing Network and the Next Generation Network

MSPPMSPP

SONET +

COE

SONET SONET

NID

Eth

COE card

mPONPMSPP

COEPacket

ONP

COE

mPONP

Backhaul Provider Challenges

COE is required for 3G and 4G backhaul

Ethernet for economical bandwidth

Connection-oriented Ethernet for loss, latency, jitter

performance

• Performance is too stringent for connectionless Ethernet

T1 transport is required

¾ of cell sites have 2G, 3G, 4G mix

Leveraging existing assets

Many sites served by MSPP equipment now

T1 over SONET is tariffed and operationalized

Minimizing access costs

Serving multiple operators with a single solution

Keep backhaul simple and familiar

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Address Emerging Requirements – Deliver Existing Services – Leverage Existing Assets

Cell Sites by RAN

(Worldwide 2010-2012)

Multi-Ran - 73%

3G-only

11%

4G-only

3%

2G-only

13%

Cell Sites by RAN

(Worldwide 2010-2012)

Multi-Ran - 73%

3G-only

11%

4G-only

3%

2G-only

13%

< 5ms latency

< 1ms jitter

< 10-6 packet loss

802.1 bridged

networks

fall short

P-ONP

Connection-oriented

Ethernet networks

exceed

Mobile Operator Ethernet

Performance Requirements

Source: Infonetics. August 2009

Case Study:

Full Service Mobile Backhaul

COE uniquely addresses emerging 3G/4G Ethernet needs Connection performance with Ethernet

aggregation

SONET integration for existing T1 backhaul Native TDM backhaul for multi-provider,

multi-RAN sites

No new sync technology, no staff retraining, no new SLAs, no new troubleshooting

Maximizes use of existing assets Existing MSPPs with EoS

Add COE units to existing MSPP chassis –Micro Packet ONP

Packet ONP is a flexible anchor point to build out new fiber to greenfield sites

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Single architecture for emerging and existing services

2G

3G

2G3G

4G

COE over

SONET Ring

NID

Native Ethernet

MSPP

EoSONET

ring

2G

3G

4G

Mobile Office /

Aggregation office

COE Ring

Packet

ONP

3G4G

mPONP

mPONP

Case Study:

DSLAM Backhaul and Wholesale Access

Mix of DSLAM backhaul required

Legacy DSLAMs - ATM over DS3

• Requires SONET backhaul

New EoCu DSLAM deployments

• Requires Ethernet Backhaul

Packet Optical COE Infrastructure

Single network for all needs

High quality Connection-oriented

Ethernet backhaul connections

• Underpins all services

• Provides broad-scale aggregation vs. EoS

• Presents a standard ENNI to partners

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ATM DSLAM

Hub CO

ATM DSLAMEth DSLAM

Eth DSLAM

DS3 DS3

GEGE

WebWebIP VPNIP VPN

COE + SONET Ring

Evolve to new EoCu DSL services while cost effectively servicing existing subscribers

mPONP mPONP

Packet

ONP

PEPE

Ethernet

partner

ENNI

Wholesale and Retail Ethernet Services

Decouples Ethernet service from the underlying network technology One COE service – any access

One end user, one service, different access

Increases the addressable end-users Embedded networks / off-net can get COE services

Increases the service velocity No specialized overlay

Enables wholesale interconnection services

Delivers standard R-UNI and ENNI

Simplifies Ethernet access network Single elements at hub and access sites

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1

One Ethernet Service Description over any type of Access Network

ENNIHub CO

NIDMSPP

T1, T3

PDH

Access

Network

COE

SONET Ethernet

WebWebIP VPNIP VPN

Packet

ONP

mPONPEoPDH

Hub

Site

MSPPMSPP

MSPP

EoPDH

EoPDH

EoPDHMSPP

MSPPMSPP

EoPDH

EoPDH

EoPDH

Hub

SitePacket

ONP

VoIPVoIPWebWebIP VPNIP VPNVoIPVoIP

WebWebIP VPNIP VPN

PEPE

Ethernet

partner

Ethernet

Service

COE + Packet Optical for Next Generation Networks

COE = Carrier Ethernet + Traffic Engineering

SONET reliability, performance, security

Ethernet flexibility and efficiency

Packet Optical Networking integrates COE and Layer 1 optical

networking

Joins existing assets (networks, people, IT) with next generation

services

Increases velocity, addressable customers, lowers cost

Unique applications being deployed now

Full Service Mobile backhaul

DSLAM backhaul

Wholesale and retail Ethernet services

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