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CiscoPress201West103rdStreetIndianapolis,IN46290USACiscoPressIPTelephonySelf-StudyCiscoDQOSExamCertificationGuideWendellOdom,CCIENo.1624MichaelJ.Cavanaugh,CCIENo.4516DQOS.bookPageiWednesday,July16,20034:06PMiiIPTelephonySelf-StudyCiscoDQOSExamCertificationGuideWendellOdomandMichaelJ.CavanaughCopyright©2004CiscoSystems,Inc.CiscoPresslogoisatrademarkofCiscoSystems,Inc.Publishedby:CiscoPress201West103rdStreetIndianapolis,IN46290USAAllrightsreserved.Nopartofthisbookmaybereproducedortransmittedinanyformorbyanymeans,electronicormechanical,includingphotocopying,recording,orbyanyinformationstorageandretrievalsystem,withoutwrittenpermissionfromthepublisher,exceptfortheinclusionofbriefquotationsinareview.PrintedintheUnitedStatesofAmerica1234567890LibraryofCongressCataloging-in-PublicationNumber:2001097407ISBN:1-58720-058-9FirstPrintingJuly2003WarningandDisclaimerThisbookisdesignedtoprovideinformationaboutqualityofservice(QoS)fortheCiscoCatalystswitchplatform.Everyefforthasbeenmadetomakethisbookascompleteandasaccurateaspossible,butnowarrantyorfitnessisimplied.Theinformationisprovidedonan“asis”basis.Theauthors,CiscoPress,andCiscoSystems,Inc.shallhaveneitherliabilitynorresponsibilitytoanypersonorentitywithrespecttoanylossordamagesarisingfromtheinformationcontainedinthisbookorfromtheuseofthediscsorprogramsthatmayaccompanyit.TheopinionsexpressedinthisbookbelongtotheauthorandarenotnecessarilythoseofCiscoSystems,Inc.TrademarkAcknowledgmentsAlltermsmentionedinthisbookthatareknowntobetrademarksorservicemarkshavebeenappropriatelycapitalized.CiscoPressorCiscoSystems,Inc.cannotattesttotheaccuracyofthisinformation.Useofaterminthisbookshouldnotberegardedasaffectingthevalidityofanytrademarkorservicemark.ThesematerialshavebeenreproducedbyPearsonTechnologyGroupwiththepermissionofCiscoSystemsInc.COPYRIGHT©2003CISCOSYSTEMS,INC.ALLRIGHTSRESERVED.FeedbackInformationAtCiscoPress,ourgoalistocreatein-depthtechnicalbooksofthehighestqualityandvalue.Eachbookiscraftedwithcareandprecision,undergoingrigorousdevelopmentthatinvolvestheuniqueexpertiseofmembersfromtheprofes-sionaltechnicalcommunity.Readers’feedbackisanaturalcontinuationofthisprocess.Ifyouhaveanycommentsregardinghowwecouldimprovethequalityofthisbook,orotherwisealterittobettersuityourneeds,youcancontactusthroughe-mailatfeedback@ciscopress.com.PleasemakesuretoincludethebooktitleandISBNinyourmessage.Wegreatlyappreciateyourassistance.DQOS.bookPageiiWednesday,July16,20034:06PMiiiPublisherJohnWaitEditor-In-ChiefJohnKaneCiscoRepresentativeAnthonyWolfendenCiscoPressProgramManagerSoniaTorresChavezCiscoMarketingCommunicationsScottMillerManagerCiscoMarketingProgramManagerEdieQuirozExecutiveEditorBrettBartowProductionManagerPatrickKanouseDevelopmentEditorGinnyBessMunroeCopyEditorKeithClineTechnicalEditorsFrankKnoxandTimSzigetiTeamCoordinatorTammiRossBookDesignerGinaRexrodeCoverDesignerLouisaKlucznikCompositorOctalPublishing,Inc.IndexerLarrySweazyProofreaderMissyPlutaDQOS.bookPageiiiWednesday,July16,20034:06PMivAbouttheAuthorsWendellOdom,CCIENo.1624,isaseniorinstructorwithSkylineComputer().Wendellhasworkedinthenetworkingarenafor20years,workinginpre-andpost-salestechnicalconsulting,teaching,andcoursedevelopment.Hehasauthoredportionsofover12courses,includingtopicssuchasIProuting,MPLS,CiscoWANswitches,SNAprotocols,andLANtroubleshooting.HeisauthorofthebestsellingCiscoPresstitleCCNAExamCertificationGuide.MichaelJ.Cavanaugh,CCIENo.4516,hasbeeninthenetworkingindustryforover17years.HisemploymentwithsuchcompaniesasGeneralElectric,CiscoSystems,andBellsouthCommunicationSystemshasallowedhimtostayattheforefrontoftechnologyandholdleadingedgecertifications.HiscurrentfocusisAVVIDimplementations,providingconverganceconsulting,professionalservices,andtechnicalsupport.Michael’spassionislearningthepracticalapplica-tionsofnewtechnologiesandsharingknowledgewithfellowengineers.AbouttheTechnicalReviewersFrankKnox,CCIENo.3698(Routing&SwitchingandSNA-IP),iscurrentlythechieftechnologyofficerforSkylineComputerCorporation.Frankalsoparticipatesinthebusinessasaconsultantandinstructorintheareasofdesign,implementation,andcustomertrainingforallaspectsofnetworking,includingIPtelephony.Frankhasmorethan35yearsofnetworkingexperiencewithIBM,GTE,andSkylineComputer.Duringthattime,hehasworkedinfieldserviceandsupport,productplanning,education,andmanagement.Inaddition,hehasdevelopedandtaughtseveralcoursesfortheUniversityofDallas(TelecommunicationsMBAprogram).Frankhasamaster’sdegreeintelecommuni-cationsfromPaceUniversity.TimSzigeti,CCIENo.9794,isamemberoftheEnterpriseSolutionsEngineeringdesignteamatCiscoSystems.Inthisrole,heworkscloselywithcustomersandengineeringtodevelopadvanced,scalable,andtestedsolutionsfortheCiscoAVVIDNetworkInfrastructure(CANI).Priortothis,hewasperformingtechnicalmarketingandproductman-agementwithintheEnterpriseManagementBusinessUnit,specializinginQoSManagement.DedicationsWendellOdom:MikeZanotto,orMikeZashe’sknownthroughoutCaliforniaandtheworld,hashadasignificantimpactonmypersonalinvolvementwiththisbook.M