8/9/2016 ConnectingGNS3toRealNetworks
SmartPCTricks
Cisco,Windows,ServerTutorials&Configurations
ConnectingGNS3toRealNetworks:PhysicalNetworkingwithGNS3
ByMubashirVP 35Comments
GNS3(GraphicalNetworkSimulator),bestnetworksimulationsoftwareallowsyoutoconnectandcollaboratevirtualnetworktopologiestorealnetworks.Thisawesomefeature
ofGNS3bringsCCNA,CCNPandCCIElabswithzeroHardware!PersonallyIwasmuchexcitedwhencametoknowthispossibilityinGNS3.Youmightevenassociatetovirtual
machinesfromVMwareorVirtualBoxtothispowerfulpieceofsoftware.InthisGNS3guideImgonnatoshareconnectingGNS3torealnetworks.Ialreadysharedonearticleof
GNS3inthatwediscussedaboutcalculatingIdlePCvalueinGNS3runningoverWindowsplatform.LinkingavirtualtopologyinGNS3torealdevicesisveryexcitingand
interestingandwhichmakesbusinessnetworksetupwell..
Nowletmegetintothetechnicaldescriptionofvirtualnetworklab.
Toolsrequired
GNS3(GraphicalNetworkSimulator):ItisthebestnetworksimulatorsoftwarethatisofferedforWindows,LinuxandMAC.Therearemanynetworksimulationtoolsare
presentlikePackettracer(bestCCNAsimulator,thiswillbeveryusefulforCCNApracticetestforpeoplewholearningCCNArouting),BOSONNetsimetc.Thespecialties
ofGNS3isthatitisFREEandwemayrunrealCiscoIOSimageinGNS3routerhenceyoumayhaverealisticexperience!
GNS3networksimulationsoftwarefreedownload
CiscoIOS:RealCiscoIOSisrequiredforrunningGNS3labs.DistributingCiscoIOSwithoutlicenseisillegalsoyoumaypleaseGoogleforIOS.
HowtointerfaceorconnectGNS3torealnetworks?
TherearethreetopologiesthatwecanrealizewithrealnetworkstogetherwithGNS3.
1.ConnectingGNS3topologytoHostcomputer.
WiththehelpofaMicrosoftLoopbackadapterwecanconnectGNS3routertoourHostPC
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2.InterfacingVirtualBoxvirtualPCswithGNS3.
GNS3supportsVirtulBoxinterfacing.PossibletoconnectGNS3routertoVirtualBoxPCs
(Iwillpostonnextarticle)
3.ConnectingGNS3toInternet
Wow!Justamazing!YoumaypossibletoimplementVPNwiththisfeature.Keepintouchwithme,Iwillbecomingwiththoseguidessoon.
AswearestartingRealnetworkinterfacingIexplainedthefirstoptioninthisarticle(ConnectingGNS3topologytoHostcomputer).Iwillbepostingothertwooptionsassoonas
possible.
InterfacingGNS3networktoHostcomputer
Theprocesscanbeexplainedwithin3stagesvizcreatingPCLoopBacknetworkAdapter,AssigningIPAddressandConnectingGNS3virtualnetworktoPCLoopBackAdapter.
[MyplatformisWindows7]
Stage1:CreatingPCLoopBacknetworkAdapter
ForinterfacingGNS3networkweshouldhaveadedicatednetworkadapter,dontworrywecancreateaVirtualLoopBackadapterinWindows7,whichservesasPhysical
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connection.
Step1:
RightclickonMyComputerPropertiesDeviceManager
Step2:
Rightclickonthefirsticon(computername)thenselectAddlegacyhardware
Step3:
AddHardwareWizardwillappear.ThiswillletyoutoinstalldriversoftwareforLoopBackadapter.JustclickNext
Step4:
ChoosemanualinstallationandclickNext.
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Step5:
Youwillseealistofhardwarehere,lookforNetworkAdapters,andthenclickNext
Step6:
InSelectMicrosoftAdapterwindowselectMicrosoftLoopbackAdapter,Next.
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Step7:
NowyouarereadytoinstallMicrosoftLoopbackAdapter,clickNexttobegininstallation.
CompletetheinstallationbyclickingFinishbutton.
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Stage2:ConfiguringLoopbackAdapterandSettingupStaticIP
Step1:
OpenNetworkingandSharingCenterbyrightclickinginthesystemtraybaricon.
Step2:
ClickChangeAdaptersettings.
HereyoumayfindthenewlyaddedMicrosoftLoopbackAdapter.ForeasyidentificationIjustrenameditintoLoopBack
Step3:
RightclickontheLoopbackadapterandtakeProperties,thendoubleclickInternetProtocolVersion4(TCP/IPV4)
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Step4:
EnabletheradiobuttonUsethefollowingIPaddressandenteranyIPasyoulikeIusedClassAIP20.0.0.1withdefaultsubnetmask255.0.0.0
Stage3:ConnectingGNS3virtualnetworktoPCLoopBackAdapter
Nowwearegonnatoentertotherealmeaningofthisarticle,wecompletedallprerequisitesforInterfacingGNS3withHostcomputer.
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Step1:
RunGNS3andaddaRoutertopologytotheworkingarea.(IhopeyouknowconfiguringIOSimageforGNS3)
GotoBrowsealldevicesthendragaCloudtotheworkspacearea.
Step2:
RightclickontheCloudandConfigure.
Step3:
ClickC1node,intheNIOEthernettabidentifyandselecttheloopbackadapterthatyoucreatedjustbefore.(YoumayfindallthenetworkadaptersthatispresentinyourPC,but
selectonlyLoopbackadapter.)
ClickAddbuttontocomplete.
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Step3:
InterconnectbetweenyourRouterandtheCloudwithFastEthernetcable.
NowRunthetopology
Step4:
Consoleyourrouterbyrightclickingontheroutericon.
Step5:
ConfigureyourroutertoassignanIPaddressforFastEthernet0/0interface.Configurationcommandsarefollowed.(TheIPaddressmustbeinthesamerangeofLoopbackIPand
subnet,forme,assigned20.0.0.2with255.0.0.0subnet)
ConnectedtoDynamipsVM"R1"(ID0,typec2600)Consoleport
PressENTERtogettheprompt.
R1#configureterminal
Enterconfigurationcommands,oneperline.EndwithCNTL/Z.
R1(config)#interfacefastEthernet0/0
R1(configif)#ipaddress20.0.0.2255.0.0.0
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R1(configif)#noshutdown
R1(configif)#
Thatsall,youhavedoneit!
NowtrytopingfromRouterconsolewindowtotheHostcomputerandviseversa.
PingingfromroutertoHostPC
PingingfromHostPCtoRouter
Wow,itispinginginbothdirections.!
IsthisGNS3guidehelpedyou?CanIhaveyourfeedbackplease?Shareyourthoughtsusingthecommentboxbelow.
*********
BonusTip:Youcanchangethecloudiconforbetterrepresentation,forthat
RightclickontheCloudiconChangeSymbol
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ChooseComputericonfromthelist.
Nowyouwillhavebetterdiagramrepresentation
*********
InmynextarticleIwillbeteachingyouInterfacingVirtualBoxvirtualPCswithGNS3.TillthencheckoutsomeofmyCiscoarticles.DontforgettolikeourFacebookpagetoget
latestupdates.
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RelatedPosts:
[Solved]Connect [Solved]Howto HowtoCalculate Networking HowtoConnect
GNS3toInternet ConnectGNS3to IdlePCValuein betweenHost CiscoIOUto
viaHostWiFi, VirtualBox:Virtual GNS3Network Computerand GNS31.1and
Category: Cisco GNS3 Networking
35thoughtsonConnectingGNS3toRealNetworks:PhysicalNetworkingwithGNS3
DanielJoseCuberoMuoz
October13,2014
Wheniusecloudwithrouterongns3ihavetodesactivemyfirewallofwindows7,Itsapossibletellthefirewallallowloopbackconextionwithoutdesactive.Howido
that?
Admin Postauthor
November26,2014
HiDani,
YoucandefinecustomFirewallrulesfromtheAdvancedFirewallsettings.
Jaseem
Sarah
November7,2014
Greatarticlethanks!
Jaseem Postauthor
November7,2014
HiSarah,
Thankyouforyourfeedback..
YoumayalsolikemynewarticleregardingIOUtoGNS3
mike
November13,2014
Urdoingagreatjob.Keepitupbro!
Jaseem Postauthor
November15,2014
ThankyouMike
Jaseem
Admin Postauthor
November26,2014
ThanksMike!
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Jaseem
Ovais
November18,2014
Greatworkandverywellexplained.
Admin Postauthor
November19,2014
ThankyouforyourfeedbackMr.Ovais
Admin Postauthor
November26,2014
HiOvais,
Hopeyougotconnectedtorealnetwork!
Jaseem
Nounou
November28,2014
wonderfulmaniappreciatethistutorialhelpsalot
Admin Postauthor
November28,2014
HiNounou,
Gladtoknowthatitwashelpful.WellbecomingupwithmoreGNS3networkingtutorials,staytuned.
Nissim
December11,2014
Veryhelpful,Thankyouman
timaz
December11,2014
thanksforyourpost.itisgoodtomentionthatinsomecasesconnectingcloudtothevRouteronGNSmightfacewithsomeerrorslikeServererror[3200]from
127.0.0.1:8000:R1:unabletocreategenericethernetNIOorsomethinglikethat.inthatcase,youcanrestartyourmachineandtheerrorwilldisappear.
YasirSaad
February27,2015
Hi,
Infact,Ihadthiserror,andIrealizedthatGNS3mustbestartedasadministratorforthisfeaturetowork.Thatsthetrickforit.
NsikoSamuel
December15,2014
IhavetriedthisconfigurationinGNS3butforsomereasontherouterisnotabletopingthecloudandyetIfinishedconnectingthecloudwithipaddress192.168.200.2/24
butcanpingthenetworkaddresswhichis192.168.200.1/24onwhichthecloudisdirectlyconnected.
enable
configureterminal
routerrip
network192.168.100.0
network192.168.200.0
exit
exit
configureterminal
interfaceFastEthernet0/0
ipaddress192.168.100.1255.255.255.0
noshutdown
exit
interfaceFastEthernet0/1
ipaddress192.168.200.1255.255.255.0
noshutdown
exit
exit
enable
configureterminal
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ipdhcpexcludedaddress192.168.100.1192.168.100.10
ipdhcppoolcyber
network192.168.100.0255.255.255.0
defaultrouter192.168.100.1
dnsserver192.168.200.2
exit
exit
NsikoSamuel
December15,2014
Thehostip192.168.200.2canpingtherouteron192.168.200.1buttheroutercannotpingthehost
AshishThakur
January23,2016
Hi,
Ihavefollowedyourstepshowevericanpingfrommycmdtorouterbutcannotdothereversewhysoasperyourinstructionyouhavedonethat
seddeeq
December29,2014
goodmorningsir.howareyou?imastudentofccna.myquestioniswhyweconnectgns3withrealnetwork?andwhatkindofconfigurationwecanpracticeafter
connectinggns3withrealnetwork?pleasesendme
JJohnson
January26,2015
ThisprocesshasstoppedworkingformeinsideofWindows8asofaweekago.IusetobeabletocreateloopbackadaptersthatconnectedmyphysicalPC/VmWare
virtualmachinesdirectlytomyGNS3environmentwithoutfailuntilrecentlyinWindows8thesamewayIdidinWindows7WITHZEROPROBLEMS.Itmakes
absolutelynosensewhyIcannolongerdothisafterasimpleresetofmyPCbacktofactorydefault.Myfirewallyisdeactivated/diasbled(asalways)andIvegonea
stepfurtherbyturningofWindowsDefenderaswell,butitsstillnotworking
ImonestepfromcryingconspiracytheoryagainstMicrosoftbecausetheresnoexplanationfortheprocesstostopworking,thusnowrequiringyoutoshareor
bridgeyourloopbackconnectionswithaphysicaladapterinordertonowgetyourphysicalPCand/orvirtuallyassignedmachinestocommunicatewithyourVmWare
environmentItsmakingmewonderifduringtheresetmyPCreachedouttomicroftandupondoingsohadascriptloadedtoitthatblocksdirectloopackadapter
communicationbetweenGNS3andloopbackadapters(again,thatsjustconspiracytheory,butitsREALLYgotmewonderingatthispoint.
Anbodyfigurethisoutminususingsharing,bridging,andallthatovermess/hoopsyouhavetojumptroughjusttomakeasimpleconnection?
Jay
sam
February5,2015
Hi
veryhelpful.OknowiconnectedmyGns3tointernet.
IwaswonderingifitspossibletocreateaVPNfromGNS3routertoarealrealCiscorouterovertheinternet?isitpossible?
umar
February22,2015
pleasehelp!
iamusingwindow8.iinstallloopbackinterfacebutitisnotshowingingns3.whatishoulddo
Vadim
April1,2015
JustrecreateaCloudorreopenyourprojectinGNS.
Mateus_CCNA
April24,2015
Man,itisfckingawsome!ImstudyingforCCNASecurityandIneedtomasterCCPinGNS3.Yourexplanationisperfect
illuminaughty
May6,2015
Thanksforthetutorial.Itgotmemostofthewaybut.
Icouldntgettheabovetowork.IfollowedthisCBTNuggetvideoanditworkslikeachamp.
Forsomereasoniproute0.0.0.00.0.0.0fa0/1wouldntwork,eventhoughitwasthecorrectinterface.
Ichangedmydefaultrouteto:iproute0.0.0.00.0.0.0192.168.10.1(MySOHOroutersaddress)
AfterthatIcouldping8.8.8.8
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CBTNuggetonGNS3andgettingouttotheinterbutts:
MicroNugget: Connecting GNS3 to the Internet
azim
June12,2015
thanxsir,,urarticlerealyhelpfultom..
kamo
July3,2015
thiscourseisveryusefull.
thankyouforyourhelping
Issa
July10,2015
Youguysareexcellent
Muhammad
July20,2015
Hey
Wheniwanttoconnectlinkbetweenrouterandclouditdidnotwork!
Actuallynothingdidnotappear??????????
Whatshouldido?
Ismaila
August2,2015
IneedhelpconnectingthecloudtothevRouter.IhavetriedallmeansknowntomeandamstillgettinsameerrormessageServererror[3200]from127.0.0.1:8000:
R1:unabletocreategenericethernetNIO.Thankyou.
Mallikarjuna
August21,2015
Afteraddloopbackinterfaceiamnotabletogitpingfromtherouteripihopeyet.
surajit
January17,2016
Wheniamconnectingcloudandrouteritisthrowingsomeerror.Thisdevicecanonlybeconnectedtocloudonthesamehost.canuhelpmeplease
Gahoot
February8,2016
hiall
cananyonehelpmeout,toconnectIOUSwitchofGNS3tophysicalrouterorswitch,Iamtiredtrying
Jared
February14,2016
Atthistime,itsnotpossibletogetIOUvirtualswitchdirectlyconnectedtooutsidenetwork.YouhavetouseaIOSbasedvirtualswitch.
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Jared
February4,2015
FoundthereplacementforWindows8.1,http://support.microsoft.com/kb/2777200
TheMicrosoftLoopbackAdapterwasrenamedinWindows8andWindowsServer2012.ThenewnameisMicrosoftKMTESTLoopbackAdapter.
SPT|PoweredbyiSt@rGroup
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