Elements of Ciena’s FlexSelect...

© Ciena Confidential and Proprietary

Elements of Ciena’s FlexSelectTM Architecture

Chuck Kaplan

VP Portfolio Management

October 7, 2008

© Ciena Confidential and Proprietary 2

Agenda

Objective

Introduction to transport network concepts

Not intended to transform you into technical experts

Outline

Optical transport networks in general

Metro WDM systems

Multiservice optical switches

Long-haul optical transport


Optical Transport Networks



What is a transport network?

A set of network elements (NE) connected by optical fibers

Signals may come from customers or other NEs

Transport Network

RouterVoice switch

Network operator

Enterprise customer Enterprise customer


How are transport networks organized?

Physically . . . Typically three tiers:

Access (tree) connects customer clients to the transport network

Metro (ring) interconnects clients or aggregates

Core (mesh) interconnects metro tiers

Access Metro Core AccessMetro

< 20 km < 800 km < 1500 km < 2500 km >2500 km

Regional Long HaulUltra Long

Haul


How are transport networks organized (cont’d)

Logically. . . Organized into transport “layers”

Layer 2

Layer 1

Layer 0

Physical

Packets

Fiber

Wavelengths

Timeslots


Comparing: Transport Networks toTransportation Systems

1. Passengers are squeezed into a car

1. Client payload is multiplexed into transport container

2. The car drives along local streets. Typically one lane in each direction. Suitable foraccess and short distances.

2. Payload is transported along the access network. Low capacity, but suitable foraccess and short distances.

3. Car drives short distance into town, through intersections to bus terminal.

3. Payload moves through local switches to get to big central office switch.

4. Lots of passengers board the bus and travel over a highway (shared). Bus takes moreenergy, but added capacity is worth it.

4. Client payload is aggregated to share use of a fiber.


5. Some buses express through towns without stopping. Other buses may stop, lettingsome passengers get on or off.

5. Some client payload transits through the CO, while other payload is added or droppedusing an add-drop multiplexer.

6. Usually buses travel around in a continuous loop.

6. Usually metro traffic flows in a metro aggregation ring.

7. People traveling long distances are dropped off at an airport to share the use of aneven larger vehicle, a plane.

7. Client traffic traveling long distances are dropped off at a core switch to share the useof a larger vehicle, the core network.

Comparing: Transport Networks toTransportation Systems


What Makes for a Good Transport Solution?

Flexibility

Wide range of service types

Adaptability

Automatic adjustments due tochanges in demand, environment,fault conditions

Manageability

Provision, monitor and maintainservices end-to-end, with minimumtraining

Assurance

Guarantee service quality, securityand availability; and prove it.

Efficiency

Fill the pipes as full as possible.

Capacity

Carry as much traffic as needed,even in an uncertain trafficenvironment.


Ciena’s FlexSelect architecture

Software-based migration from SONET/SDH to Ethernet and OTN

End-to-end automated resource and connection management

End-to-end service level management

99.9999% service availability

Reduces the number of metro wavelength required by 75%

Scalable from 400 Gbps to 4 Tbps

Access Metro Core AccessMetro

CoreStreamAgility

CoreDirectorCN 4200CN 3000

ON-Center

FLEXIBILITY

ADAPTABILITY

MANAGEABILITY

ASSUREDNESS

EFFICIENCY

CAPACITY


Metro WDM Systems



Why is Metro Wave DivisionMultiplexing (WDM) needed?

More traffic, all coming to the same place

Variety of traffic types (circuit and packetvoice, packet data (internet, video, gaming,storage)

To Point B

To Point C

To Point Z

SONET/SDH

Fibre Channel

Ethernet

Wavelengths

Circuit switching:think train travel.Whole train followssame pre-determinedpath from point A topoint Z based onswitched tracks.

Packet switching,think car travel.Cars are smallerand have multipleoptions to get frompoint A to Z.

SONET/SDH: optical technologydesigned to carry massive amountsof voice traffic

Fibre Channel: optical technologydesigned to transport data betweenstorage devices

Ethernet: data networkingtechnology used to connectcomputers; later adapted for longerdistances networks


Metro WDM systems aggregate and transporttraffic from point A to point Z

How do Metro WDM systems operate?

Point-to-point Linear add/drop Ring

Aggregation

Point A Point Z Point A Point Z

Point B

Point APoint Z

Point B

Point C


Optical Transport Networking

A simpler, lower cost alternative to SONET/SDH

Carries SONET/SDH, Ethernet, Fiber Channel, wavelengths

Shared, transparent digital container

End-to-end network management

What is OTN (G.709)?

SONET

Fibre Ch.

Ethernet 1 765432

1

1 65432

1. ClientSignals Enter

1 765432 8914

1

3121

110

16

15

4. Mapped intoOTN Frame

PayloadHeader Trailer

2. Mapped to Timeslots

3. Timeslots multiplexed together

5. OTN Frame senton wavelength


What Makes for a Good Metro WDM Solution?

Capacity

Traffic per wavelength x Number ofwavelengths

Flexibility

Ease, speed, and variety of servicetypes and network topologies

Software control of traffic types

Software control of connectivity

Efficiency

How well resources are utilized.Better efficiency lowers cost.Resources include

people,

wavelengths,

equipment.

Power Consumption

Watts consumed to aggregate andtransport a given number ofservices.


Ciena’s metro WDM solution: CN 4200 family

Advanced aggregation capability

Multiple service types on one wavelength

Maximum wavelength efficiency

Manages wavelengths, circuits, & packets

Unlimited service flexibility

Any service, any port, any time

Near real-time network changes tosupport service migration from circuit topacket. Flexiports.

OTN


CN 4200 family overview

CN 4200

CN 4200 MC

CN 4200 RS

• Software configurable service types

• Integrated wavelength, circuit, and packet management

• Configurations for network edge, metro infrastructure, andregional networks


Multiservice Optical Switches



What is a multiservice optical switch?

Guides various kinds of information to final destination

EndSystem 1

EndSystem 2


What do multiservice optical switches do?

Aggregation

Merging multiple traffic flows into astream.

Purpose: fuller pipes = fewer ports

Switching or Cross-Connecting

Interconnecting streams

Gigabit

Ethernet

1250Mb/s

OTU1

2.7Gb/s

STM-1/OC-3155Mb/s

Client Ports

OTU2Wrapper

STM-16/OC-48

2.5Gb/s

Port 1

Port 2

Port 3

Port 4

SW Controllable SwitchingPort 1 to Port 4Port 2 to Port 3


Grooming

Extracting portions of a stream andplacing into another stream

Protection & Restoration

Rerouting traffic to another path whenone or multiple failures occur.

West

EastPort 1

Port 2

Port 3

Port 4

Port 5

LA Metro Ring

To DC

To SF

To NY

Grooming

InternationalFiber

What do multiservice optical switches do?


What makes for a Good multiservice opticalswitching solution?

Flexibility

Variety of service types anddegrees of protection

Adaptability

Automatic adjustment toenvironmental, demand or faultconditions

Manageability

Provision, monitor and maintainservices, with minimum training

Assurance

Guarantee service quality, securityand availability , and prove it

Capacity

Amount of traffic that can becarried

Efficiency

More capacity and services withless people, equipment, and pipes


Ciena’s Multiservice Optical Switch:CoreDirector

• Industry leading mesh capability

• Deployed in the world’s most reliableterrestrial and submarine networks

• Advanced network automation


Long-Haul / Ultra Long-HaulOptical Transport Systems



What does an optical transport system do?Transponding and DWDM

Fiber is scarce, expensive to construct

DWDM puts many signals onto each fiber using Optical Add / Drop Mux

the more colors (frequencies) per fiber, the better

Transponder (XPND) receives one color, changes to another

XPND

OADM

Fiber

XPND

XPND

OADMOADM

XPND

XPND

XPND

Fiber


What else do optical transport systems do?Amplification and Regeneration

Over fiber distance and OADMs, optical power is attenuated.

Optical line amplifier (OLA) boosts power

Signal integrity also damaged by “noise” from the amplificationprocess

Signals are regenerated: receive,

convert to electrical,

clean up,

convert back to optical,

Re-transmit

Strength(power)

OADMXPND OLA OLA OADM OLAREGEN OADM RCVR

Quality(OSNR)

OperatingRange

OperatingRange


What makes for a Good optical transportsolution?

Capacity

Gigabits per second (Gbps) perwavelength

Spectral Efficiency

# wavelengths per spectrum band

Reach

Distance the signal can travelbefore needing regeneration oramplification

Cost-per-bit-per-KM

All costs / all capacity

Flexibility

Range of client signal types, bit-rates, and topologies with minimumhardware


Ciena’s CoreStream Agility

• 2.5 Gb/s, 10 Gb/s, and 40 Gb/s onone platform

• Wide variety of configurations tocover regional, national, and ultralong haul applications

• Automated transport networkconfiguration


Ciena’s FlexSelect ArchitecturePutting it all together

Flexible ManageableAdaptable Assured

Core

Metro

Access

EnterpriseService Provider

WDMMetro

DWDMMetro

GbE


Q&A

Elements of Ciena’s FlexSelect...

Documents

Transcript of Elements of Ciena’s FlexSelect...