StepbyStepGuideforConfiguringNetworkLoadBalancingwithTerminalServicesinWindowsServer2.docx

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StepbyStepGuideforConfiguringNetworkLoadBalancingwithTerminalServicesinWindowsServer2.docx

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StepbyStepGuideforConfiguringNetworkLoadBalancingwithTerminalServicesinWindowsServer2.docx

StepbyStepGuideforConfiguringNetworkLoadBalancingwithTerminalServicesinWindowsServer2

Step-by-StepGuideforConfiguringNetworkLoadBalancingwithTerminalServices:

WindowsServer2008

MicrosoftCorporation

Published:

March 2008

Author:

SusanBoher

Editor:

RonaldLoi

Abstract

Thisstep-by-stepguideprovidestheinstructionsnecessarytoconfigureNetworkLoadBalancing（NLB）withTerminalServicesfortheWindows Server® 2008operatingsystem.ThisguidealsoincludesinstructionsoninstallingandconfiguringNLBandsettingupaterminalserver.

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Contents

Step-by-StepGuideforConfiguringNetworkLoadBalancingwithTerminalServicesinWindowsServer20085

NLBwithTerminalServicesoverview5

TerminalServicescomponents6

TerminalServicesSessionBrokerservice6

TerminalServicesConfigurationsnap-in7

RequirementsforusingNLBwithaterminalserver7

StepsforconfiguringNLBwithTerminalServices7

Step1:

SetupaterminalserverfarmwithTSSessionBroker8

Step2:

InstallNLB10

Step3:

CreateanNLBcluster10

Loggingbugsandfeedback12

Additionalresources12

Step-by-StepGuideforConfiguringNetworkLoadBalancingwithTerminalServicesinWindowsServer2008

Thisstep-by-stepguideprovidesinstructionsforconfiguringNetworkLoadBalancing（NLB）withTerminalServices.

UsingNLBwithTerminalServicesoffersthebenefitsofincreasedavailability,scalability,andload-balancingperformance,aswellastheabilitytodistributealargenumberofTerminalServicesclientsoveragroupofterminalservers.

NLBwithTerminalServicesoverview

NLBdistributestrafficacrossseveralserversbyusingtheTCP/IPnetworkingprotocol.YoucanuseNLBwithaterminalserverfarmtoscaletheperformanceofasingleterminalserverbydistributingsessionsacrossmultipleservers.

TerminalServicesSessionBroker（TSSessionBroker）,includedinWindowsServer®2008Standard,WindowsServer2008Enterprise,andWindowsServer2008Datacenter,keepstrackofdisconnectedsessionsontheterminalserverfarm,andensuresthatusersarereconnectedtothosesessions.Additionally,TSSessionBrokerenablesyoutoloadbalancesessionsbetweenterminalserversinafarm.ThisfunctionalityisprovidedbytheTSSessionBrokerLoadBalancingfeature.However,thissession-basedloadbalancingfeaturerequiresafront-endloadbalancingmechanismtodistributetheinitialconnectionrequeststotheterminalserverfarm.YoucanusealoadbalancingmechanismsuchasDNSroundrobin,NLBorahardwareloadbalancertodistributetheinitialconnectionrequests.BydeployingNLBtogetherwithTSSessionBrokerLoadBalancing,youcantakeadvantageofboththenetwork-basedloadbalancingandfailedserverdetectionofNLB,andthesession-basedloadbalancingandperserverlimitonthenumberofpendinglogonrequeststhatisavailablewithTSSessionBrokerLoadBalancing.

Note

TousetheTSSessionBrokerLoadBalancingfeature,allterminalserversinthefarmmustberunningWindowsServer2008.FormoreinformationabouttheTSSessionBrokerLoadBalancingfeature,seetheWindowsServer2008TSSessionBrokerLoadBalancingStep-by-StepGuide.

WhendeployingaterminalserverfarmbyusingNLB,eachserverneedstoserveallusers.Tofacilitatethis,youmuststoreper-userinformation,systeminformation,andcommondatainanaccessibleplace,suchasaback-endfileserver.

TerminalServicescomponents

TerminalServiceshastwocomponentsthatareimportantforestablishingloadbalancing:

theTerminalServicesSessionBrokerserviceandtheTerminalServicesConfigurationsnap-in.

TerminalServicesSessionBrokerservice

Thisservicemaintainsadatabasethatkeepstrackofterminalserversessionsinaload-balancedterminalserverfarmandprovidesinformationtotheterminalserver,whichisusedtoconnectuserstoexistingsessions.

WhentheTerminalServicesSessionBrokerservicestarts,itcreatestheSessionDirectoryComputerslocalgroup.Bydefault,thisgroupisnotpopulated.YoumustchoosetheindividualterminalserversorgroupsthatyouwanttoparticipateintheTerminalServicesSessionBrokerservice,andthenmanuallychangegroupmembershipstotheSessionDirectoryComputersgroup.

TheTerminalServicesSessionBrokerservicestartsautomaticallyafteryouinstalltheTSSessionBrokerroleserviceontheserverthatyouwanttousetotrackusersessioninformationforaload-balancedterminalserverfarm.YoucanuseasingleTSSessionBrokerservertotrackusersessionsacrossmultiplefarmsbecausethereisminimalperformanceoverhead.

WhenyouinstalltheTSSessionBrokerroleservice,thefollowingchangesoccuronthelocalcomputer:

∙TheTerminalServicesSessionBrokerserviceisinstalled.Bydefault,theserviceissettoStartedandtoAutomatic.

∙TheSessionDirectoryComputerslocalgroupiscreated.

Installationprerequisites

∙TheserverwhereyouinstalltheTSSessionBrokerroleservicemustbeamemberofadomain.

∙TheWindowsServer 2008-basedserverwhereyouinstalltheTSSessionBrokerroleservicedoesnothavetobeaterminalserverorhaveRemoteDesktopenabled.

Note

IfyouinstalltheTSSessionBrokerroleserviceonadomaincontroller,theSessionDirectoryComputersgroupwillbeadomainlocalgroup,anditwillbeavailableonalldomaincontrollers.

Installationprocedure

IfyoudonothaveanyoftheTerminalServicesroleservicesinstalled,usethefollowingproceduretoinstalltheTSSessionBrokerroleservice.

ToinstalltheTSSessionBrokerroleservice

1.ClickStart,pointtoAdministrativeTools,andthenclickServerManager.

2.UnderRolesSummary,clickAddRoles.

3.IntheAddRolesWizard,reviewtheBeforeYouBeginpage,andthenclickNext.

4.OntheSelectServerRolespage,selecttheTerminalServicescheckbox,andthenclickNext.

5.OntheTerminalServicespage,clickNext.

6.OntheSelectRoleServicespage,selecttheTSSessionBrokercheckbox,andthenclickNext.

7.OntheConfirmInstallationSelectionspage,confirmthatTSSessionBrokerislisted,andthenclickInstall.

8.OntheInstallationResultspage,clickClose.

TerminalServicesConfigurationsnap-in

Thissnap-inisincludedoneachterminalserver.TerminalserversthatcomprisetheterminalserverfarmcommunicatewithTSSessionBrokertoensurethatusersaretransparentlyreconnectedtotheoriginalserverhostingtheirdisconnectedsessions.Theprocessis:

1.Whentheuserlogsontotheterminalserverfarm,theterminalserverreceivingtheinitialclientlogonrequestsendsaquerytotheTSSessionBrokerserver.

2.TheTSSessionBrokerservercheckstheusernameagainstitsdatabaseandsendstheresulttotherequestingserver.Oneofthefollowingoccurs:

∙Iftheuserhasnodisconnectedsessions,logoncontinuesattheserverhostingtheinitialconnection.

∙Iftheuserhasadisconnectedsessiononanotherserver,theclientsessionispassedtothatserverandlogoncontinues.

RequirementsforusingNLBwithaterminalserver

TouseNLB,acomputermusthave:

∙Atleastonenetworkadapterforloadbalancing.

∙OnlyTCP/IPusedontheadapterforwhichNLBisenabled.Donotaddanyotherprotocols（forexample,IPX）tothisadapter.

∙AllhostsintheNLBclustermustresideonthesamesubnet.

∙Ensurethatthecluster'sclientsareabletoaccessthissubnet.

∙Allterminalserversintheterminalserverfarmshouldbejoinedtothesamedomain.

StepsforconfiguringNLBwithTerminalServices

ToconfigureNLBwithTerminalServices,completethefollowingsteps:

Step1:

SetupaterminalserverfarmwithTSSessionBroker.

Step2:

InstallNLB.

Step3:

CreateanNLBcluster.

Step1:

SetupaterminalserverfarmwithTSSessionBroker

ForaterminalservertouseTSSessionBroker,youmustaddthecomputeraccountfortheterminalservertotheSessionDirectoryComputerslocalgroupontheTSSessionBrokerserver.

Important

YoumustperformthisprocedureontheserverwhereyouinstalledtheTSSessionBrokerroleservice.

ToaddaterminalservertotheSessionDirectoryC

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