Cisco NGN Transport Solutions - Cisco - Global Home … of Optical Transport Network Single Standard...

© 2009 Cisco Systems, Inc. All rights reserved. Cisco PublicPresentation_ID 1

Cisco NGN Transport Solutions

David Bianchi

Moustafa Kattan

November 2009, Cisco

Willem Rossouw, Consulting Systems Engineer

[email protected]

CCIE # 4248

mailto:[email protected]

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco ConfidentialPresentation_ID 2

Agenda

Transport Trends and Considerations

NG DWDM Architecture Evolution and Enablers

NG DWDM Aware Control Plane

Transport Options: a comparison


Global IP Traffic Growth Impacting Network Architecture

0

25,000

50,000

2005 2006 2007 2008 2009 2010 2011 2012

PB

/mo Mobility

Business Internet

Business IP WAN

Consumer Internet

Consumer IPTV/CATV

IP Traffic Will Increase 6X from 2007 to 2012

In 2012, Half a Zettabyte Will Cross the Global Network

Impact on the

Network:

Core Grows 5X,

Metro Grows 7X

Source: Cisco Visual Networking Index—Forecast, 2007–2012

Mobile Data to Grow

at 125% CAGR

2007–2012

With Video,

Consumer IP

Quadruples

by 2012

Requirements: High bandwidth optical transport with service

transparency, topology flexibility and control plane integration


High Level Considerations

Strong focus on costs as b/w increases outstrip revenue increases

Particularly related to packet services

Packet Services are growth engine

Driving an upgrade to the DWDM infrastructure

Other Services

Legacy migration

E-Line Services

Shifting Economics

Photonics switching is the cheapest form of switching

Opti-electrical components becoming a greater portion of the end to end costs

Electronic costs between transport and routing are closing


Technology Developments

Agile Photonics Layer

DWDM hardware

G-MPLS control plane based on WSON

10/40G share lambdas well / 100G not so good : Requires Guard Bands

Optical Transport Networks (OTN)

Digital wrapper and framing :

Digital Cross Connects : TDM component : Role in a world dominated by packet

MPLS Technologies

MPLS for L2 and L3

MPLS-TP : Technical innovation around OAM


IP NGN trends from Transport perspectiveSONET/SDH to NG Network Migration

Services

TDM ATM IP

SONET, EOS

DWDM

Dark Fiber

Services

TDM IP

Ethernet

DWDM

Dark Fiber

SONET

Today Future

Services

Eth IP

Ethernet

DWDM

Dark Fiber

TDM

TDM to Ethernet service migration•Higher bandwidth to support multi-services•Service granularity requirements need statistical mixing to reduce capex•Peak rate vs. guaranteed rate

Maintaining transport characteristics through the technology transition•Pre-determined path•In-band OAM•Fast detection and recover time •NMS provisioning•Tight LSA: BW, QoS, HA


Today

Access AccessCore

L3

L2

Voice

TDM

B/W

ATM

SDH

dWDM

IP/MPLS


The NGN evolution

Access AccessCore

L3

L2

Voice

TDM

B/W

ATM

SDH

dWDM

IP/MPLS

dWDM

IP/MPLS

EthernetEthernet L3

L2

Voice

TDM

B/W

Access AccessCore


Agenda






Base Architecture

WDM I/F

WDM I/F

Optical Switching via MSTP

Router WDM PLIM/ SPA for 2.5G, 10G, and 40G ls

DWDM LH Transmissionto Other Sites MSTP

Innovative Extensions to GMPLS to Make It DWDM Aware

Integrated EMS (Router + Transport)

Out-of-Band Signaling Channel


Service Layer Interface Integration—The Virtual Transponder (VTXP) Concept

Virtual transponder protocolSecure session between router

and optical NE

Supports full FCAPS for WDM i/f

XML based

The WDM NE converts VTXP info to its legacy information model to the EMS

Router reflected as a transponder shelf

WDM i/f reflected as a transponder

No change to NMS/OSS

Router

WDM i/fs

WDM

NE

WDM i/fsWDM i/fsWDM i/fs

IP manager Transport manager

WDM i/fs

WDM

NE

WDM i/fsWDM i/fsTransponder

VTXP


Next Gen DWDM IPoDWDM and Control Enabler

IPoDWDM reduces CAPEX

Less components, shelves, processor cards, etc…

IPoDWDM reduces OPEX

Less shelves, less rack space, less power, simplifies trouble shooting, etc…

IPoDWDM Resiliency

Less Opto Electronic Components, enhanced fault recovery features, etc…

Control Plane Developments

Virtual Transponder

SRLG awareness

Before

CRS-1 ROADMTransponder

Transponder Integrated into CRS-1

CRS-1 ROADM

DW

DM

I/F


Introducing: IPoDWDM for the approaching Zettabyte EraDoubling Reach, Extending beyond Core, Zero Touch

December 2005

Today

Core

CRS-1

AggregationEdge

XR 12K/12K

Aggregation Edge

XR 12K/12K

40G IPoDWDM 1000 Km

Cisco 7600

CRS-1

Zero-touch for

intermediate nodes Cisco 7600

ONS 15454 MSTP

Core

CRS-1

AggregationEdge

XR 12K/12K

Aggregation Edge

XR 12K/12K

2x Reach: 40G IPoDWDM 2000 Km

Cisco 7600

CRS-1

Zero-touch for

ALL nodesCisco 7600

Extending

IPoDWDM

ONS 15454 MSTP


Towards Dynamic Service Activation

Manual Patching

• Manual provisioning of each node

• Manual patching of each node

• High OpEx

• Truck rolls to every node

Dynamic Service Activation

with ROADMs and S-GMPLS

• Auto provisioning on demand via S-GMPLS

• Auto patching via ROADMs

• Lower OpEx even further

• No truck rolls

With ROADMs

• Manual provisioning via NMS

• Auto patching via intermediate ROADMs

• Lower OpEx

• More service flexibility

• Truck rolls to end-points

6

8

75

Manual PatchingManual Provisioning

1

432

1

432

6

5

Manual Provisioning Manual Patching

Dynamic

Service

Activation


Trans-

ponder

SR port

on

router

Proactive FRR based on pre-FEC errors

Optical impairmentsCorr

ecte

d b

its

FEC limit

Working

path

Switchover

lost data

Protected

path

BE

R

LOF

WDM

FEC

Today’s protection

WDM

port on

router

Optical impairmentsCo

rre

cte

d b

its

FEC limit

Protection

trigger

Working path Protect path

BE

R

Near-hitless

switch

WDM

FEC

Proactive protection


Agenda






Next Generation Transport Control Plane Architecture

IP NGN /

Carrier Ethernet

Any Transport over DWDM

Control

Control

SONET

SDH

OTN

Control

DC/SAN

Control

IP over Optical

IPoDWDM /

CEoDWDM

Control

Flexible & Open WDM Architecture:

Transparent Transmission

High-performance (EFEC, adv. mod.)

Bit-rate & Protocol Independent

‘Alien-Wavelength’

Operations Friendly

G.709 OAMP, tunability, GMPLS

Network planning flexibility

ROADM/WXC, 0 Pre-Planning, Planning tools


TDM LSP

Packet LSP

End to End Control Plane

Unified Control Plane

GMPLS

IP Routing Protocols

With Extensions

OSPF

Label Distribution Protocols

RSVP TE

MPLS

RSVP TE

Forwarding

Plane

PSC

Domain

GMPLS Domain

TSC

Domain

WSON

LSC

Domain

Optical

SONET

SDH OTN NE

Switch

Switch Switch

Switch

Router

Router

Router

Router

SONET

SDH OTN NE

SONET

SDH OTN NE

RouterRouter

RouterRouter Switch

Switch

Switch

Switch

Nested LSPs

Lambda LSPTDM LSP

Packet LSP

Router

Router

Router

Router


WSON functionality

Impairment aware control plane

Client interface registration

Alien wavelength (open network)

Transponder (closed network)

ITU-T interfaces (segmented network)

Wavelength on demand (Zero planning wavelength setup)

Bandwidth addition on the same connection

New connection setup

Wavelength reroute for latency reduction

Optical shared restoration (0+1+R and 1+1+R)

Network failure reaction

2nd failure handling

Multiple SLA options (Bronze 0+1, Super Bronze 0+1+R, Platinum 1+1, Super Platinum 1+1+R)


Oakland

Fremont

Pleasanton

San Francisco

Burlingame

Hayward

Santa Rosa

Fairfield

A

B

CD

AB

C

D

San Jose

Palo Alto

Berkeley

TDM XC

DWDM Layer

40G Lambda with ASON Protection and Restoration

•40G XC at Each Site (ex 10X40G Links)

•No Pass through. All Add drop

•Large XC Capacity

•DWDM Layer is anyway there

•Additional Redundant TDM Layer

•How to transport third party DWDM

signals ?

•How about Latency ?


Oakland

Manamat

Dammam

Abu Dhabi

Dubai

Al Hufuf

Fujairah

Kuwait City

A

B

CD

AB

C

D

R

AToDWDM Control Plane

•Impairment Aware DWDM

Control Plane

•Switch when you can

(Lambda Switching)

•Regen when you must

•No XC, No Redundant Layer

•No additional Latency

•Lower CostDoha


Agenda






Overview of Optical Transport Network

Single Standard but two discrete components G.709

Multiple versions (up to v3)

Digital Wrapper

Opti-electrical and optical components : Transponders and ROADM

Header information for management of optical layer

Forward Error Correction for increasing optical drive distances

OTN Hierarchy and Cross Connecting

Electrical solution

Time Division Multiplexing Technology

Switching Hierarchy

Optical Cross

Connect

Adds G.709 headersWDM transponders

Multi-degree ROADM

Cross Connecting Lambdas

Dropping full lambdas

OTN Electrical Cross Connect

Grooming and aggregation

Sub-lambda interfaces

(SONET, OTN, Ethernet, ESCON)

Question on the role of OTN Cross Connecting packet traffic


Designing End to End IP/MPLS networks

Hierarchical

High bandwidth connections and increments

100, 40, 10G onto lambdas, POS

Link Bundles

1 Physical link = 1 logical IP link

Transport layer is mainly static

Protection is in the IP domain

Hierarchy Hollow (OTN based)IP Bypass

• Hierarchical with router bypassed where demands warrant

Full mesh between IP routers

1.25Gbps connections and increments

Logical links built ODU-FLEX technology

Physical Link = Many IP logical links

IP OTN layer signalling

Dynamic OTN signalling

Protection is in the OTN domain

High Bandwidth Bypass

1 to 1 Links

Low Bandwidth Bypass

1 to N Links

Today’s Methodology


Cisco’s Core Evolution Vision

Digital OTN

E-LAN E-TreeL3

svcs

100G DWDM With Agile Photonics Switching

MPLS Technologies Digital

OTN

Private Line

OTN Digital Wrapper

E-Line

E-LineSONET

/SDH

Packet Level demands in the core are lambda level and rising

MPLS and OTN are both clients to the an Agile 100G DWDM layer


Clients to the DWDM Switching LayerRouters and OTN Switches

TDM

CE

MPLS

Routers and Packet Switches

OTN Switch

Private Lines

TDM and Eth

DWDM Switching Layer

and ROADMs

TDM

CE

MPLS

Routers and Packet Switches

OTN Switch

Private

Lines


Solutions to Implementing 100G DWDM

All lambdas upgraded to 100Gbps

Sub-100G services provided by OTN OEO

Advantages

All lambdas on a fibre are 100G

Disadvantages

100TXP investment upfront

Need an additional OTN OEO

All 10G TXPs are obsolete

10G and 100G DWDM

Coexistence

10G and 100G lambdas co-exist on same fibre

Packet uses 100G, everything else 10G

Advantages

Only high demand clients upgraded to 100G

Protects existing 10G DWDM investment

Lowest cost per bit (100G TXPs>10 x10G TXPs)

Disadvantages

Need a guard band between 10G and 100Gfrequencies

100G lambda

10G lambda

100G lambdas

OTN OTN

10G SR

100G SR

OTN Multiplexing


It’s about the cost of transiting Intermediate Sites

Creates an IP mesh

Creates an IP hierarchyStatistical Multiplexing

Transport Layer Bypass

Photonics Layer Bypass


The Contrasting Topologies

L3 Routing Nodes

OTN ODU-FLEX switch

Internet

Internet

Business Data

Centre

Business Data

Centre

Internet

Internet

Business Data

Centre

Business Data

Centre

Video and

Internet cache

Video and

Internet cache

IP/TV

Head End

IP/TV

Head End

Hierarchical SolutionPhysical and Logical Topology the same

Bypass Solution

End

User

End

User

http://www.reshalls.org/borah/cd-rom/mv_animal_large.wmv

http://www.reshalls.org/borah/cd-rom/mv_animal_large.wmv


Packets Versus Circuits

1000 Ethernet Circuits

7 x 10GEs per metro

28 x 10GE core links7 x 10GEs per metro

CORE METRO

METRO

METRO

METRO

METRO

56 x 10GEs

1000 Ethernet Circuits

21 x ODU2s per Metro

84 x ODU2 core links 21 x ODU2s per metro

CORE METRO

METRO

METRO

METRO

METRO

161 ODU2s

1287 ODU0s

Packet Approach Circuit Approach

112 X 10GEs 329 X 10GEs


What’s the Impact at the Network Level ?Links and Over Provisioning : 40% CAGR

1Gbps Initial Demand1Gbps increments

1Gbps Initial Demand10Gbps increments

Network Wide Implications – 100 Node network

Worse over-provisioning : Links * b/w incrementNetwork wide link upgrades = Links * Link upgrades

Worse case over-provisioning =200 * 10Gbps = 2000Gbps

Number network wide physical link upgrades = 200 * 0 = 0

Network Wide Implications – 100 Node network

Worse over-provisioning : Links * b/w incrementNetwork wide link upgrades = Links * Link upgrades

Worse case over-provisioning =5000 * 1Gbps = 5000Gbps

Number network wide logical link upgrades = 5000 * 7 = 35000

Note : This does not take into account physical link upgrades

Link Level Over provisioning

Link Level Over Provisioning

Network Efficiency and provisioning needs to account for total number of links, traffic growth, provisioning efficiency and upgrade frequency.


Summary

The photonic layer is becoming a switching layer

Statmuxing is essential for optimised packet transport

MPLS technologies support IP and transport packet services

Today’s and future packet demands are lambda level

There are multiple ways to move to 100G DWDM

Digital OTN cross connects is the non-optimal solution

OTN supports E-Line services however

Not optimal for service mixes projected

Depends on attitude to E-Line Services

Cisco NGN Transport Solutions - Cisco - Global Home … of Optical Transport Network Single Standard...

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