Cisco press MPLS and next generation networks foundations for NGN and enterprise virtualization nov 2006 ISBN 1587201208

MPLSandNext-GenerationNetworks:Foundations
forNGNandEnterpriseVirtualization
ByMoniqueMorrow,AzharSayeed
...............................................
Publisher:CiscoPress
PubDate:November06,2006
PrintISBN-10:1-58720-120-8
PrintISBN-13:978-1-58720-120-2
Pages:422

TableofContents|Index

UnderstandthebusinesscasefordeployingMPLS-basedservicesandsolutions
ProvidesnetworkmanagersandarchitectsapreciseMPLSprimer
DefinesMPLSserviceproblemsandtheirassociatedsolutions
IncludesROImodelsforMPLS-basedsolutions
DiscussesprosandconsofvariousoptionsforeachMPLSservice
NetworkmanagersoftenquestionthevaluethatMPLSbringstotheirbusiness
environment.Thisbookprovidesthemwithapreciseguideforevaluatingthebenefitsof
MPLS-basedapplicationsandsolutions.Thebookguidesthenetworkmanagerthroughthe
businesscaseforMPLSbyexploringothertechnologyalternatives,includingtheir
applications,benefits,anddeficiencies.Understandingtheservicecreationprocessasthe
basisforMPLS-basedsolutionsispivotalwhendescribingthebenefitsthatMPLSoffers.
Furthermore,thebookexploresMPLStechnologyanditscomponents,providingan
overviewofthearchitecturenecessarytoreapthetrueadvantagesthatMPLSbringstoa
serviceproviderorenterprisenetwork.Theseadvantagesincludenewrevenue
opportunitiesandatotalcostofownershipreductionthatpositivelyimpactsacompany's
bottom-line.ROImodelsandcasestudyexamplesfurtherconfirmthebusinessimpactand
helpdecision-makerscreateablueprintforMPLSservicecreation.Specificaspectssuchas
security,networkmanagement,advancedservicesandthefutureofthetechnology
completethebook,helpingdecisionmakersassessMPLSasacandidatefor

implementation.Inshort,readerscantousethiscomprehensiveguidetounderstandand
buildabusinesscasefortheinclusionofMPLSintheirnetworks.


MPLSandNext-GenerationNetworks:Foundations
forNGNandEnterpriseVirtualization
ByMoniqueMorrow,AzharSayeed
...............................................
Publisher:CiscoPress
PubDate:November06,2006
PrintISBN-10:1-58720-120-8
PrintISBN-13:978-1-58720-120-2
Pages:422

TableofContents|Index

Copyright
AbouttheAuthors
AbouttheTechnicalReviewers
Acknowledgments
IconsUsedinThisBook
Foreword
Introduction
Part1:TheBusinessCaseforMPLS

Chapter1.TheDynamicsofServiceCreationandDeployment
IndustryDynamicsandChallenges
WhatAbouttheEnterpriseMarket?
BusinessDriversandRequirements
ServiceProvidersandEnterprise:TheBattleofOutsourcingVersusDo-ItYourself
SubscribingtoaManagedLayer3MPLSVPNService
TheCaseforBuildingVPNsLayer2orLayer3
ExistingTechnologiesFrameRelay,ATM,andIP-BasedNetworks:WhatCan
TheySolve?
ServiceExamples
Summary
Chapter2.TheScopeofServiceTypes
OverviewofLayer2Services
Next-GenerationNetworkOverviewandInterworkingFunctions

Layer3Services
RemoteAccess
Value-AddedServices
Summary
Part2:TheTechnicalCaseforMPLS
Chapter3.TechnologyOverview:MakingtheTechnologyCaseforMPLSand
TechnologyDetails
AvailableTechnologiesandOptions
WhyMPLS?(High-LevelDetail)
MPLSandQualityofService
Benefits
MPLSTechnologyDetails
Layer3VPNs
CarrierSupportingCarrierandInter-ProviderAutonomousSystems
TrafficEngineering
DiffServ
Layer2VPNs
Summary
Part3:MplServicesandComponents
Chapter4.Layer2VPNs
Taxonomy
IntroducingAToM
Layer2Interworking
VirtualPrivateLANService
ProvisioningandSignaling
BenefitsofL2VPNs
Inter-ASL2VPNs
SupportedIETFStandards

Summary
StandardsandReferences
Chapter5.Layer3VPNs
TechnologyOverview
CorporateIntranet
CorporateExtranet
InternetAccess
ScalingMPLSVPNstoMulti-AS,Multi-Provider,andHierarchicalNetworks
HeterogeneousNetworks
ManagedCentralServices
SupportedIETFDrafts

Summary
Chapter6.RemoteAccessandIPSecIntegrationwithMPLSVPNs
TechnologyOverview
PE-CERoutingProtocols
ScalabilityandNetworkConvergenceforRemoteAccess
Summary
Chapter7.MPLSSecurity
SecurityandNGN
SecurityOverviewandMPLS
MPLSVPNandSecurity
AttackScenarios
IPSec
Layer2andUnmanagedVPNServiceConsiderations
OverallBestPracticeRecommendations
Summary
StandardsandReferences
Chapter8.TrafficEngineering
ProblemStatement
TechnologyOverview
TEApplicationsandExamples
ProtectionandRestoration
ScalingMPLSTE
MPLSTrafficEngineeringandMulticast
StandardsandReferences
Summary
Chapter9.QualityofService
ProblemStatement
StandardsandReferences

Summary
Chapter10.MulticastandNGNs
ProblemStatement
MPLSMulticastVPNOverview
MPLSMulticastVPNApplicationsandExamples
MulticastSecurityandManagementConsiderations
StandardsandReferences
Summary
Chapter11.IPv6andMPLS
ProblemStatement
TechnologyOverview




ManagementandIPv6


Summary

Part4:BringingYourMPLSPlanTogether

Chapter12.NetworkManagementandProvisioning

ProblemStatement

FaultManagement,ConfigurationManagement,AccountingManagement,

PerformanceManagement,andSecurityManagement

VRF-AwareICMPPingandLSPPing/TraceMechanisms

DealingwithEqualCostMultipaths

VirtualCircuitConnectionVerificationandBidirectionalForwardingDetection

AWordAboutInterworkingOAM

GenericFailureTypes

ConfigurationManagementforMPLS-BasedNetworks

AccountingforMPLS-BasedNetworks

PerformanceManagementforMPLS-BasedNetworks

SecurityManagementforMPLS-BasedNetworks

Per-VPNManagement

StandardsandReferences

Summary

Chapter13.DesignConsiderations:PuttingitAllTogether

VRF-AwareFeature

NAT-PESystemFlow

DeploymentGuidelineSummary

Management,Provisioning,andTroubleshooting

EquipmentScalabilityVersusNetworkScalability

Summary

Chapter14.MPLSCaseStudies

TheBackgroundonEquant

VPNBridgeCaseStudy

Summary

Chapter15.TheFutureofMPLS

IntegratingIPandOpticalNetworks(TransportArea)

FutureLayer3Services

FutureLayer2Services

FutureEnhancementsinProvisioningandManagement

IncreasingEnterpriseDeploymentofMPLS

Summary

AViewfromGeorgeSwallow





AViewfromAdrianFarrell
Index


Copyright
MPLSandNext-GenerationNetworks
MoniqueMorrowandAzharSayeed
Copyright©2007CiscoSystems,Inc.
Publishedby:
CiscoPress
800East96thStreet
Indianapolis,IN46240USA
Allrightsreserved.Nopartofthisbookmaybereproducedor
transmittedinanyformorbyanymeans,electronicor
mechanical,includingphotocopying,recording,orbyany
informationstorageandretrievalsystem,withoutwritten
permissionfromthepublisher,exceptfortheinclusionofbrief
quotationsinareview.
PrintedintheUnitedStatesofAmerica1234567890
FirstPrintingNovember2006
LibraryofCongressCataloging-in-PublicationNumber:
2003115150

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logo,andtheCiscoSquareBridgelogoaretrademarksofCisco
Systems,Inc.;ChangingtheWayWeWork,Live,Play,and
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Dedications
MoniqueMorrow:IdedicatethisbooktomyparentsSamand
OdetteMorrowwhohavealwaysencouragedmetostrivefor
theverybestwherenothingisimpossible.Additionally,tomy
dearestfriendsVeroniqueThevenazandIreneHoehnwhohave

providedmewiththegreatestgiftoffriendship.Thankyou!
AzharSayeed:Idedicatethistoseveralpeoplewhohave
shapedandaffectedourlives.Somenotablementionsaremy
familymembers:mywifeSameena;mytwowonderful
daughtersAbeerandAreej;myparentsforalltheirlove,
affection,wonderfulsupport,encouragementtobethebest,
andtheirhardworkthroughoutmylife;andmyonlybrother
Mazharforhisencouragementtotakeonchallengingtasks.
SeveralfriendshaveshapedmycareerandIamindebtedtoall
ofthemfortheirhelp,guidance,andfriendship.Buttheone
wholefthismarkandpassedawayveryyoung,alwayssmiling,
ismyfriendandbuddyVijayKrishnamoorthy.




AbouttheAuthors
MoniqueJeanneMorrowiscurrentlyaDistinguished
ConsultingEngineeratCiscoSystems,Inc.Shehasmorethan
20yearsexperienceinIPinternetworkingthatincludesdesign,
implementationofcomplexcustomerprojects,andservice
developmentforserviceproviders.Moniquehasbeeninvolved
indevelopingmanagednetworkservices,suchasremote
accessandLANswitchinginaserviceproviderenvironment.
Moniquehasworkedforbothenterpriseandserviceprovider
companiesintheU.S.andinEurope.In1999,Moniqueledthe
engineeringprojectteamforoneofthefirstMPLS-VPN
deploymentsforaEuropeanserviceprovider.
Moniquehaspresentedinvariousconferencesonthetopicof
MPLS.Additionally,MoniqueiscoauthorofthebookDesigning

IP-BasedServices:SolutionsforVendorsandServiceProviders.
MoniqueisalsothecoauthorofMPLSVPNSecurityandMPLS
forDecisionMakers.Sheisworkingonabookthatpresents
enterprisedriversandconcernsforIP-basedservicedelivery.
MoniqueisactiveinboththeIETFandITU-TSG13withafocus
onOAM.Shehasamaster'sofsciencedegreein
telecommunicationsmanagementandanMBA.Additionally,
MoniqueisvicechairofIPsphereForum.
MoniqueiscurrentlyengagedinMPLSOAMstandards
developmentandhasbeenengagedininternationalcarrier
discussionsonthetopic.Moniquewasaco-guesteditorofa
specialissueoftheIEEECommunicationsMagazineonthe
subjectof"OAMinMPLS-BasedNetworks,"whichwaspublished
inOctober2004.Shewasalsoaguesteditorofaspecialissue
oftheIEEECommunicationsMagazineonthesubjectof
"ChallengesinEnablingInter-ProviderServiceQualityonthe
Internet,"publishedinJune2005andonthesubjectof,
"GMPLS:ThePromiseoftheNextGenerationOpticalControl


Plane,"publishedinJuly2005.Finally,Moniqueisworkingon
NGNforserviceprovidersandGRIDtechnology.
AzharSayeediscurrentlythedirectorofproductmanagement
fortheCiscoNetworkSoftwareandSystemsGroup.Hehas
morethan16yearsofnetworkingandcommunicationsindustry
experience.Azhariscurrentlyresponsibleforproduct
managementandrolloutofMPLS,Layer2andLayer3VPNs,
broadbandtechnologiesIProuting,andQo)featuresinCisco
IOSsoftware.CiscoIOSsoftwareisthenetworksystem
softwarethatpowersthemajorityofCiscohardwareplatforms.

PriortojoiningCiscoin1998,AzharworkedforCabletron
SystemsasaproductlinemanagerfortheATMgroup.He
designedandimplementedproductdevelopmentstrategiesand
broughtproductstomarket.Hehasheldadditionalindustry
positionsincludingthatofanATMaviatorwithDigital
EquipmentCorporationwherehesupportedpresaleoperations
oftheHighPerformanceNetworksgroupforDigital.
Azharstartedhiscareerasafieldengineer,installingX.25and
FrameRelaygearforlargeserviceproviderandenterprise
networks.Sincethen,hehasbeeninvolvedwithATMandMPLS
inDEC,Cabletron,andCisco.
Azharhaspublishedseveralresearchpapersfromhismaster's
thesisanddozensofmagazinearticlesonMPLSandQoS.He
hasbeeninvitedtospeakatseveralconferences,suchasMPLS
2002throughMPLS2005.HehasalsospokenatMPLSCon
2002,BroadbandYear,Comdex,N+I,Supercomm,APRICOT,
MPLSWorldCongress,andsoon.
Azhar'sinterestsincludenetworkprotocolsandwirelessand
broadbandtechnologies.Azharholdsabachelor'sdegreein
electronicsandcommunicationsandamaster'sdegreein
electricalengineering.HeisalsoamemberofIEEEandIEEE
communicationssociety.





AbouttheTechnicalReviewers
JosephFuscoistheproductdirectorforBTInfonet'sglobal
MPLSCisco-powerednetwork,anetworkthatservesover1000

clientsaroundtheworld.Hehasprovidedconsultingservicesin
theareaofglobalserviceprovidernetworkfeaturesand
deployment.Hehaspublishedarticlesandspokenatindustry
forumsonMPLS.HeisagraduateoftheUniversityofSan
Franciscoandobtainedhismaster'sdegreefromNational
UniversityofSanDiego.HeworkedforXeroxCorporationasan
instructorintheearlyreleasedaysofEthernetandpriorto
joiningBTInfonet,heheldseniormanagementpositionsat
SymantecCorporation.
ThomasD.NadeauworksatCiscoSystemswhereheisa
technicalleaderwhoisresponsiblefortheleadershipof
operations,management,networkmanagementstandards,and
developmentandarchitectureforMPLS-relatedcomponentsat
Cisco.
TomisanactiveparticipantintheIETF,ITU,andIEEE.Heis
coauthorofmanyIETFMIBs,protocol,andarchitecture
documentsintheL2/L3VPN,TE,PWE3,GMPLS,andMPLS
areas.TomiscoauthorofRFC3564,RFC3811,RFC3812,RFC
3813,RFC3814,RFC3815,RFC3916,RFC3945,andRFC
3985.TomwasrecentlycoeditoroftheOctober2004IEEE
CommunicationsMagazine'sspecialsectionon"MPLS
OperationsandManagement."Tomhasfiledanumberof
patentsintheareaofnetworkingoperationsandmanagement.
Tomreceivedhisbachelorofscienceincomputersciencefrom
theUniversityofNewHampshire,andamaster'sofscience
degreefromtheUniversityofMassachusettsinLowell,where
hehasbeenanadjunctprofessorofcomputersciencesince
2000.Tomcurrentlyteachescoursesonthetopicofdata
communications.Heisalsoonthetechnicalcommitteesof

severalprominentnetworkingconferenceswhereheprovides
technicalguidanceontheircontent.Healsoservesonthe
technicaladvisoryboardofWestridgeNetworks.Heisthe
technicaleditorofEnablingVPNAwareNetworkswithMPLS
(PrenticeHallPublishers,2001)andauthorofMPLSNetwork
Management:MIBs,Tools,andTechniques(Morgan-Kaufman,
2002).
ChristopheMasieroisheadofVPNServicesatEquant
NetworkServices.Inthiscapacity,heleadstheteamthat
managestheEquantflagshipproductMPLS-basedIPVPNas
wellastraditionaldataservicessuchasX.25,FrameRelay,and
LANaccess.HisresponsibilitiesincludeP&Lownership,
definitionofthemarketing,pricing,developmentstrategies,
andcostoptimizationaspartofthelife-cyclemanagementof
eachproduct.
Priortoassumingthisproductmanagementposition,Masiero
wasaseniorresearchconsultantinEquant'sTechnicalStrategy
group.Inthisrole,Masieroprovidedstrategicrecommendations
toEquantseniormanagementfortheintroductionofleadingIP
technologies,suchasMPLS,classofservices,andIPsec.
PriortojoiningEquantin1999,Masieroheldaseriesofsales
supportpositionsforAlcatelinboththeU.S.andFrance.In
theseroles,heparticipatedinsalesefforts,deliveringFR,ATM,
IPsolutions,andturnkeyvoicenetworksolutionsto
internationalcarriers.
MasierowasaFrenchAirForcereserveofficer,holdsaFrench
master'sdegreeincomputersciencesandelectricalengineering
fromESIGETEL,France,andanMBAfromKennesawState
University,GA.

Acknowledgments
Wewishtoacknowledgeanumberofpeoplewhohavemade
thisbookpossible,namelyouremployerCiscoSystems,our
managersDanielScheinmanandChristineHemrick,Steven
Steinhilber,ChipSharp,BenGoldman,andSangeetaAnand.
Withouttheirsupport,thisbookwouldnothavebeenwritten.
Wearegratefultoourtechnicalreviewers,TomNadeauatCisco
Systems,JoeFuscoatInfonet,andChristopheMasieroat
Equant.Theyensuredqualitycontentandrelevancetothe
industry.Wewouldalsoliketothankthesereviewersfortheir
timeandeffortinhelpingtoshapethisbookforpublication.
Additionally,wewouldliketoacknowledgethefollowingCisco
Systemsindividualswhohavecontributedtothiseffort
(unknowingly):SangitaPandiya;JimGuichard;GeryCzirjak;
CraigMulholland;RipinChecker;GeorgeSwallow;JeffApcar;
HariRakotoranto;andJaakDefour.Ithastrulybeenateam
effort!WealsowouldliketothankSusanScheer,vicepresident
ofengineeringatCiscoSystemsfortakingthetimeoutofher
verybusyscheduletowritetheforewordtoourbook.Finally,
wearemostgratefultooureditorsandtheCiscoPressteam:
ReinaHan,BetseyHenkels,BrettBartow,JimSchacterle,and
TammiBarnettforworkingdiligentlywithusonthisbookand
keepingthebookonscheduleforpublication.Contentsata
Glance


IconsUsedinThisBook
[Viewfullsizeimage]

CommandSyntaxConventions
Theconventionsusedtopresentcommandsyntaxinthisbook
arethesameconventionsusedintheIOSCommandReference.
TheCommandReferencedescribestheseconventionsas
follows:


Boldfaceindicatescommandsandkeywordsthatare
enteredliterallyasshown.
Italicsindicateargumentsforwhichyousupplyactual
values.
Verticalbars(|)separatealternative,mutuallyexclusive
elements.
Squarebrackets[]indicateoptionalelements.
Braces{}indicatearequiredchoice.
Braceswithinbrackets[{}]indicatearequiredchoice
withinanoptionalelement.




Foreword
In1996,CiscotookadramaticstepattheIETFinrequestinga
BOFtodiscussstandardizingtagswitching.Tagswitchingisa
technologythatwaspioneeredbyCiscotoestablishacommon
controlplaneacrossIPandATMnetworks.Thatsameyear,
Ciscoshippedthefirstimplementationoftagswitchingin
softwarerelease12.0(1)A.
Inlessthanadecade,tagswitching,orasitlaterbecame

knownthroughthestandardizationprocess,MultiprotocolLabel
Switching(MPLS),hasbecomealeadingtechnologyforIPenabledservices.Morethan250serviceprovidersaroundthe
globehavedeliveredservicesbasedontherobustCiscoMPLS
roadmap,andagrowingnumberofenterprisesarealso
deployingMPLStomeetinternalITdemands.
WhyisMPLSsuchadrivingforceintheindustry?Theattributes
ofMPLSenablecustomerstoeasilyseparatecustomeroruser
trafficthroughalabel(ortaggingmechanism)muchlikethe
postalserviceforwardsmailwithapostalorzipcoderather
thanthefulladdress.Separatingtrafficbasedonlabelslends
itselftoavirtualprivatenetwork(VPN)service.Furthermore,
MPLSallowsproviderstodirectorreroutetrafficthroughthe
Ciscotraffic-engineeringmechanisms.Providerscan
differentiateservicesthroughqualityofservice(QoS),
deliveringagold,silver,andbronzeoffering.MPLSisnow
advancingtomeetincreasingrequirementsforvoice-and
video-basedservicesandsupportinginterconnectionsacross
serviceproviderdomainstoreachnewmarketsormeet
multinationalcustomersites.Ultimately,MPLSisevolvingto
enableaconvergedpacketnetworkthatallowsprovidersto
migrateexistingLayer2servicesandtheirIP-basedservices
acrossarobustcommoninfrastructure.
TheconceptofMPLSisalsoextendedtoGeneralMPLSor


GMPLSforIP+Opticalrequirementstodeliverdynamic
bandwidthallocation.
HerearejustafewexamplesoftheimpactMPLShasonthe
industry:
In1999,BritishTelecomGlobalServiceslaunchedBTMPLS

todeliverglobalmultipoint,data,voice,andvideonetwork
servicesthatprioritizeandsupportanymixofIP
applications.BTMPLSofferscomprehensiveServiceLevel
Agreementsthatcoverdelivery,availability,andnetwork
performance.
EquantIP-VPNserviceoffersfivedistinctclassesofservice
fortheirMPLSVPNservicewitheachclasstiedtoparticular
applications.Equantallowscustomerstomonitortheir
networkservicesthroughawebinterface.
InfonetoffersanIPVPNSecureproductdeliveredovertheir
MPLS-basedprivateIPinfrastructure.Theserviceoffersfive
ormoreclassesofservicetargetedtomultinational
corporationsinthepharmaceuticals,financialservices,
manufacturing,logistics,andchemicalsegments.Infonet
hasengineeredvoice,video,anddataclassseparately.
BellCanadaandSt.Joseph'sHealthcarepartneredto
deliveratelerobotics-assistedsurgeryoverBellCanada's
VPNenterpriseservicetoprovidehealthcareservicesin
remoteregionsofCanada.
Theauthorsofthisbook,MoniqueMorrowandAzhar
Sayeed,havebeenattheforefrontoftheMPLStechnology
revolution.Theycollectivelyhave35yearsofexperiencein
thetelecommunicationsindustry,andtheyhaveworked
withserviceprovidersandenterprisesaroundtheglobeto
guidetheirservicedefinitionsandassistwiththeirnetwork


designs.Theybothhavehands-on,practicalexperienceat
thebusinessandengineeringlevels.Theyhaveshapedthe
Ciscoproductportfolio,identifyingnewcapabilitiestomeet

increasingcustomerrequirementsfornewapplications,
higheravailability,andbetteroperationalcontrols.
Wehopethatthisbookwillhelpyourealizethebusiness
opportunityfromMPLS-basedservices.
SusanE.Scheer,vicepresidentofengineering
CiscoSystems,Inc.




Introduction
MPLSisbecomingthetechnologyofchoiceforLayer2and
Layer3servicedelivery.Morethan250serviceprovidersand
enterprisecustomershaveintegratedMPLSintotheirnetworks
toprovideLayer3VPNs,implementtrafficengineering,reduce
costsfromoperatingmultiplenetworks,andincreaserevenues
fromnewserviceoptionsbasedonMPLStechnology.
Chieftechnologyofficers,ITmanagers,networkmanagers,
serviceproviderproductmanagers,andservicearchitectshave
manydifferentchoicesinarchitectingandbuildingtheir
backbones.Forexample,theycanbuildonexistingLayer2
networksandaddIProutingfunctionality,ortheycanbuilda
newhigh-speedpacketcoreusingmultiservicedevicesandadd
Layer2orLayer3servicestoit.Thesedecisionmakersalso
needatechnologythatcanscaletotheirnetworkforvarious
servicesandtrackthegrowthcurvewithoutradicallychanging
thedesignmidwaythroughdeployment.Fortheseindividualsto
makeintelligentchoices,theyrequireacomprehensive
overviewthatincludesservicemanagement,technology
management,andnetworkmanagement,sothetotalcostof

ownershipcanbedetermined.Thisbookdiscussesaseriesof
stepsthatnetworkmanagerscanfollowfortheintroductionofa
newLayer2orLayer3serviceusingMPLS.

WhoShouldReadThisBook?
TheprimaryaudienceforthisbookincludeCTOs,ITmanagers,
networkmanagers,serviceproviderproductmanagers,and
servicearchitectswhoareresponsibleforassessingtechnology
andarchitectureasabasisforserviceandsolutions
deployment.Industryanalysts,focusingon
telecommunications,constitutethesecondaryaudienceforthe
book.


NetworkmanagersoftenquestionthevaluethatMPLSbringsto
theirbusinessenvironments.Thisbookprovidesthemwitha
preciseguideforevaluatingthebenefitsofMPLS-based
applicationsandsolutions.Thebookguidesthenetwork
managerthroughthebusinesscaseforMPLSbyexploringother
technologyalternatives,includingapplications,benefits,and
deficiencies.Understandingtheservicecreationprocessasthe
basisforMPLS-basedsolutionsispivotalwhendescribingthe
benefitsthatMPLSoffers.ThebookexploresMPLStechnology
anditscomponents,providingthereaderwithanoverviewof
thearchitecturenecessarytoreapthetrueadvantagesthat
MPLSbringstoaserviceproviderorenterprisenetwork.These
advantagesincludenewrevenueopportunitiesandatotalcost
ofownershipreductionthatpositivelyimpactsacompany's
bottomline.Returnoninvestment(ROI)modelsandcasestudy
examplesfurtherconfirmthebusinessimpactandhelpthe

decisionmakercreateablueprintforMPLSservicecreation.
Specificaspects,suchassecurity,networkmanagement,
advancedservices,andthefutureofthetechnologycomplete
thebook,helpingdecisionmakersassessMPLSasacandidate
forimplementation.

HowThisBookIsOrganized
Thebookisdividedintofourmajorsectionsasfollows:
Part1,"TheBusinessCaseforMPLS,"includesChapters1,"The
DynamicsofServiceCreationandDeployment,"and2,"The
ScopeofServiceTypes."
Chapter1detailstheindustrydynamics,competitive
outlook,businessmotivation,anddriversforservice
creationanddeployment.Itprovidesexamplesofservice
typesanddiscusseshowserviceprovidersbuildnetwork
infrastructuresforservicedeployment.Italsooutlineswhy
largeenterprisecustomersneedsuchservicesforeitherdo-


it-yourself(DIY)oroutsourcing.
Chapter2discussesthebreadthofservicesthatare
availabletotheserviceproviderandtheenterpriseand
includesadetaileddescriptionofeachservicetype.It
describesLayer2,Layer3,remoteaccess,andvalue-added
servicessuchasmanagedVPN,web-hosting,andmanaged
sharedservices,aswellastheirapplicabilityinthecurrent
environment.
Part2,"TheTechnicalCaseforMPLS,"includesChapters3,
"TechnologyOverview:MakingtheTechnologyCaseforMPLS
andTechnologyDetails."Thischapterhighlightsalltheavailable

technologiesforcreatingtheservicesdescribedintheprevious
chapters.Itprovidesprosandconsforeachoptionandbuildsa
caseforMPLSasabaselinetechnologyforservicecreation.
Part3,"MPLSServicesandComponents,"includesChapters4,
"Layer2VPNs,"Chapter5,"Layer3VPNs,"Chapter6,"Remote
AccessandIPSecMPLS-VPNIntegration,"andChapter7,"MPLS
Security,"Chapter8,"TrafficEngineering,"Chapter9,"Quality
ofService,"Chapter10,"MulticastandNGN,"andChapter11,
"IPv6."
Chapter4providesanoverviewofLayer2VPNsandhow
MPLScanbeusedtodeliverLayer2framesacrossapacket
network.ItalsocomparesandcontrastsotherLayer2
transportmechanismsthatareavailabletodothesameand
highlightsthebenefitsofMPLSinbuildingLayer2VPNs.
Chapter5providesatechnologyoverviewofLayer3service
components,describingtheirfunctionsandoperations.It
alsodiscusseshowMPLSLayer3VPNtechnologycanbe
usedtobuildmanagedcentralservicesfordeveloping
value-addedmodelsoverandaboveVPNconnectivity.