© 2007 Extreme Networks, Inc. All rights reserved.Extreme Networks Confidential and Proprietary.

Extreme NetworksPBT Strategy

Martin van SchootenSr. Director, Worldwide Field MarketingMarch 2007

Page 2 © 2007 Extreme Networks, Inc. All rights reserved.Extreme Networks Confidential and Proprietary.

PBT and it’s Target Market

Many Service Providers have split decision making and budgeting

• Data Group – IP Router & MPLS Focused

• Transport Group – SONET/SDH & Cross Connect focused

PBT addresses the requirements and operational work flow of the transport group

• Deterministic network behavior

• End-to-end resiliency

Page 3 © 2007 Extreme Networks, Inc. All rights reserved.Extreme Networks Confidential and Proprietary.

Service Delivery Evolution

Network Economics

HighLow

Hig

hLo

w

Se

rvic

e C

apa

bili

ties

Circuit Switching

TraditionalEthernet

Layer 3 MPLS Layer 2MPLS

PBT

Multi-Dimensional

Ethernet

T-MPLS

Page 4 © 2007 Extreme Networks, Inc. All rights reserved.Extreme Networks Confidential and Proprietary.

PBT key benefits

Deterministic network behaviour

• Nailed-up circuits, no Ethernet learning and flooding

Resilient network designs

• End to end circuit based resiliency

• 50ms failover times

Familiar network operations compared to an MPLS approach

• No need for new personnel with Layer 3 experience

• No need to tackle the complexity of MPLS or MPLS Traffic Engineering

• Maintaining current operational model expected to yield OPEX savings

Significantly lower CAPEX compared to Ethernet over SONET/SDH or MPLS models

Page 5 © 2007 Extreme Networks, Inc. All rights reserved.Extreme Networks Confidential and Proprietary.

Ethernet Technology Enhancements

Provider Backbone Transport

MAC-in-MAC

(802.1ah)

Provides massive

scalability

Ethernet NNI

(MEF E-NNI)Extends service

reach across provider

boundaries

Ethernet OAM

(802.1ag) End-to-end

resiliency with continuity checks

Deterministic, Resilient and Familiar

Page 6 © 2007 Extreme Networks, Inc. All rights reserved.Extreme Networks Confidential and Proprietary.

Customer Edge (VLAN)

Customer Edge (VLAN)

Q in Q Encapsulation

Provider Backbone Bridge (MAC in MAC)

Provides scalability required for service provider deployments

• Eliminates address space scalability issue

• Solves economic issues with MAC table size expansion

Provides backwards compatibility for easy implementations

• Works in conjunction with 802.1ad (Q in Q)

Reduces carrier concerns about building large layer 2 networks

Q in Q Encapsulation

Provider Backbone Bridging

Page 7 © 2007 Extreme Networks, Inc. All rights reserved.Extreme Networks Confidential and Proprietary.

Ethernet OAM for End-to-End ResiliencyService Provider 2 Service

Provider 1

CustomerCustomer Service Provider 1

Provider 2 Core Network

Provider Domain

Operator Domain

Operator Domain

Operator Domain

Continuity Check Messages

Continuity Check Messages

Page 8 © 2007 Extreme Networks, Inc. All rights reserved.Extreme Networks Confidential and Proprietary.

Ethernet NNI to Extend Service ReachAllows peering between provider Ethernet services

Increases carrier reach with Ethernet service extension to off-net sites

Uses a combination of technologies

• Link Aggregation

• VLAN C-VID/S-VID translation

MEF Standard expected later this year

Provider 1 Provider 2

E-NNI

Page 9 © 2007 Extreme Networks, Inc. All rights reserved.Extreme Networks Confidential and Proprietary.

Next Generation Networking Developments

1. IEEE PAR (project authorization request) for PBT goes to the executive committee for the March plenary meeting

2. Extreme & Nortel PBT Interoperability Demonstration

3. IEEE 802.1ah and 802.1ag reach sponsor ballot stage

4. PBT Open Interoperability showcase

5. MEF E-NNI Letter Ballot

6. Extreme FCS release for PBT on BD10K and BD12K platforms

7. IEEE PBT could reach sponsor ballot in the IEEE in 18 months

3

2007 2008|

5 71

2 4 6

Standards

Vendors

Page 10 © 2007 Extreme Networks, Inc. All rights reserved.Extreme Networks Confidential and Proprietary.

Customer Site 1

Customer Site 2

Provider Backbone Bridge (MAC in MAC)

Migration to PBT

PBB (MAC-in-MAC) networks can be deployed today

PBT traffic engineered trunks can be added later

• Both can run on the same switches at the same time

PBT Ready hardware

IP Service Edge or

MPLS Core

Page 11 © 2007 Extreme Networks, Inc. All rights reserved.Extreme Networks Confidential and Proprietary.

PBT versus T-MPLS

SimilaritiesBoth recognize the importance of meshing with service provider transport group requirements

• Connection oriented technology

• Nailed-up circuit support

Both Require a new control plane

DifferencesPBT can support multi-point to multi-point services with PBB

PBT Ethernet OAM better defined than MPLS OAM

PBT leverages the economics of Ethernet

PBT has support from a growing group of influential service providers

Page 12 © 2007 Extreme Networks, Inc. All rights reserved.Extreme Networks Confidential and Proprietary.

Extreme Networks - PBT Product Plans

PBT will be offered on the BD12K and BD10K platforms

Software only upgrade – hardware support is there

New smaller BD12K chassis will launch in April extends PBT closer to the edge and to smaller central offices

Interoperability Demonstration this summer with Nortel

Open interoperability testing later in the year

Page 13 © 2007 Extreme Networks, Inc. All rights reserved.Extreme Networks Confidential and Proprietary.

Key benefits for carrier transport groups

Deterministic network behaviour

Resilient network designs

Familiar network operations compared to an MPLS approach

Significantly lower CAPEX compared to Ethernet over SONET/SDH or MPLS models

© 2007 Extreme Networks, Inc. All rights reserved.Extreme Networks Confidential and Proprietary.

Thank You