Five Essential Elements for Future Regional Optical Networks

Harold SnowSr. Systems Architect, CTO Group

Confidential2

Agenda

Five Essential Elements – Harold Snow, Meriton Networks Reconfigurability Pay as You Grow Scalability Aggregation and Sub-Wavelength Switching Multi-Degree Operation Automated Network Planning and

Management Systems

Internet2 Network Discussion – Christian Todorov, Internet2

Q & A

Confidential3

The Transition to 21st Century Transport Networking

20th Century

Fundamentally changing the value model of the transport infrastructure

Switching of connections (Subrate λ paths and full λ paths)

Transmission of bits

Closed OADM ring

Separation of Ethernet Aggregation layer and Optical domain

Multi-ring access and multi-degree switching

Convergence of the Ethernet-Optical layer

21st Century

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Reconfigurability

R&E Network environment presents unique challenges: Permanent Circuits

Dynamic Circuits Years, Months, Weeks, …

End-to-End circuits, and/or attachment to intermediate Routers

GigE, 10GigE, 40Gbps, 100Gbps, …

Mostly, it’s about creating Ethernet paths through the optical network

Need circuit connectivity that is: Cost Effective across capacity range

Agile

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Optical Reconfigurability

SiteN

Site1

Site3

Site5

Site7

D

C

B

BA

A

D

C

C-C Initially between Site 3 and Site 5

Change Circuit to go between Site 3 and Site 7

Wavelength Selective Switch (WSS) facilitates switching in Optical Domain

• Requires transponder equipment at endpoints only

• All other nodes unchanged

• Saves Cost

• Saves Churn

Site2

Site4

Site6

C

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Pay as You Grow Scalability:“Spot” Upgrades

A-A Initially at 10Gbps Upgrade to 40Gbps

C-C Initially at 1 x 10GbpsUpgrade to 2 x 10Gbps

B-B

Add New Circuit

• WSS Optical Switching requires equipment changes at endpoints only

• All other nodes unchanged

• Saves Cost, Churn

• Capacity is added where it is needed, when it is needed…

SiteN

Site1

Site3

Site5

Site7

D

C

B

B

A

A

D

C

Site2

Site4

Site6

The overall capacity of the ring has been increased

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Network Efficiency: Sub-Wavelength Aggregation

ADM-on-a-Wavelength Transponders incorporate standards compliant ADM functionality on a pair of line-cards

Effective utilization of every wavelength (per wavelength, VC3/STS-1 level grooming)

Add/Drop or optically bypass any aggregation wavelength at any node

Dramatic Reduction in the amount of equipment

Sub-s are “Virtual Wavelengths” for lower-rate circuits (GigE) 9 x Full GigE per 10G

ADM terminal is replaced by a pair of E-W transponders

ADM ring becomes a wavelength in the WDM ring

Stacked ADM Rings

e.g. 40 boxes 4

10 NEs/ site

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Beyond Two Degrees Example: Multiple Rings

A B

A

C

C

A

B

How to do this effectively while retaining values of:

• Dynamic Reconfigurability

• Non-Blocking

• “Virtual Lambda” efficiencies

10G

1G

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Multi-Degree Operation

Wavelength and Sub-Wavelength Switch

• Multi-degree OEO switching and Optical Switching functionality integrated on one platform

• Non-blocking switching of Full- Wavelengths and Sub- “Virtual Wavelengths” between fiber degrees

• Not limited to 4 Degrees

• Enables Layer Optical Mesh…

&

Sub-Switch

Op

tic

al

Op

tic

al

&

Sub-Switch

Op

tic

al

Op

tic

al

&

Sub-Switch

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A Flexible Optical Layer

On Demand Ethernet Optical Paths through the Transport Layer Via IP/MPLS Layer

Flexibility Direct end-to-end

Low latency & low jitter

Predictable QoS

Off-load Routers

End-to-End path management of individual GigE optical paths

IP/MPLS

Agile Optical Layer

Real-timeComputing

Center

Ethernet

10GigE

GigEs

10GigE

PublicInternet

Universities, Labs, etc.

General BatchComputing& Storage

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Looking Forward…

Most if not all of the network traffic will become Ethernet based

Can we leverage some flexibility and cost advantages by aggregating and sub- switching at the Ethernet layer?

Use Ethernet as a “Tunnel Support” protocol Creates “circuit orientated” end to end Ethernet tunnels

Single service facilitation methodology for service delivery

Precedent set with IP core networks where MPLS is used

Range of standards based Tunnel methodologies under discussion in ITU Transport Study Group PBB-TE

T-MPLS

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Vision:Converged Ethernet Optical Network

WavelengthSwitching

Sub- Wavelength Switching

EthernetTunnel

Switching

C/DWDM fiber pairs Grey interfaces: GigE/10GigE, STM-n/OC-n

From anyport, wavelength, or Ethernet tunnel

To any otherport, wavelength, or Ethernet tunnel.

Multi-degreewavelength transport

and switchingvia OEO and WSS

Layer 1-based Ethernet

Sub Wavelength Switching

Layer 2 Ethernet

Switching++ … in a single carrier-class platform

Integrated Service Switching for Future R&E Networks

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Automated Network Planning System

Optical layer designGUI based interface

Auto-insert nodes & spans

Calculate OSNR, nonlinearities & dispersion penalties

Allocate equipment

Traffic planningInput services via drag and dropCalculate most efficient use of

wavelengths and capacity Minimize cost and/or resource

usageImport/Export capability

Design Networks in Minutes

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Network Management System

1. Simplify Routine Functions Integrated with network and element management functions

Point-and-click Lightpath provisioning Operator-Selected Routing and . . .

Automatic Lightpath Routing

End-to-end lightpath protection Non-disruptive Live Routing Changes

2. Reduce Errors Auto-discovery of equipment, topology,

and connections

Automatically detect fiber cabling errors

3. Provide Advanced, Time-Saving Features Performance management

Remote loop-back management

Single view for all equipment

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Summary

Reconfigurability Any Circuit, Anywhere, On Demand…

Pay as you Grow Scalability Incur cost and churn only When and Where it is required Future-proof for Higher Capacities

Network Efficiency Effective use of capacity for lower rate (Sub-Wavelength) circuits

Multi-Degree Operation Non-Blocking operation for > 2 Degrees Support for Sub-Wavelength circuits

Network Planning and Management Simplified Creation and Operation of the Network Optically Engineered for future lambda rates Point-and-Click GUI

Confidential16

Christian Todorov, Internet2

Confidential17

Questions?Thank You