Catalyst 2960 and 3560 Series Static VLANS VLAN Trunking.docx

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Catalyst 2960 and 3560 Series Static VLANS VLAN Trunking.docx

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Catalyst 2960 and 3560 Series Static VLANS VLAN Trunking.docx

Catalyst2960and3560SeriesStaticVLANSVLANTrunking

Lab2-1Catalyst2960and3560SeriesStaticVLANS,VLANTrunking,

andVTPDomainandModes

Objective

SetupaVTPdomain,createandmaintainVLANs,anduseInter-SwitchLink

（ISL）and802.1QtrunkingonCiscoCatalyst2960and3560seriesEthernet

switchesusingcommand-lineinterface（CLI）mode.

Scenario

VLANsmustlogicallysegmentanetworkbyfunction,team,orapplication,

regardlessofthephysicallocationoftheusers.AllendstationsinaparticularIP

subnetareoftenassociatedwithaspecificVLAN.VLANmembershiponaswitch

thatisassignedmanuallyforeachinterfaceisknownasstaticVLAN

membership.

Trunking,orconnectingswitches,andtheVLANTrunkingProtocol（VTP）are

usedtosegmentthenetwork.VTPmanagestheaddition,deletion,andrenaming

ofVLANsontheentirenetworkfromasinglecentralswitch.VTPminimizes

configurationinconsistenciesthatcancauseproblems,suchasduplicateVLAN

names,incorrectVLAN-typespecifications,andsecurityviolations.

Step1

Poweruptheswitchesandusethestandardprocessforestablishinga

HyperTerminalconsoleconnectionfromaworkstationtoeachswitchinyourpod.

Ifyouareconnectingremotelytoyourswitches,followtheinstructionsthathave

beensuppliedbyyourinstructor.

2-18CCNP:

PrepareforthelabbyremovingallVLANinformationandconfigurationsthatmay

havebeenpreviouslyenteredintoyouswitches.RefertoLab2.0“Clearinga

Switch”andLab2.0b“ClearingaSwitchConnectedtoaLargerNetwork.”

Step2

Todifferentiatebetweenthedevices,givetheswitchesnamesusingthe

hostnamecommand.WewillalsoputIPaddressesonthemanagementVLAN

accordingtothediagram.Bydefault,VLAN1isusedasthemanagementVLAN.

Thefollowingisasampleconfigurationforthe3560switchDLS1.

Switch#configureterminal

Enterconfigurationcommands,oneperline.EndwithCNTL/Z.

Switch（config）#hostnameDLS1

DLS1（config）#interfacevlan1

DLS1（config-if）#ipaddress10.1.1.101

DLS1（config-if）#noshutdown

DLS1（config）#end

DLS1#

Repeatthesestepsontheotherpodswitchesaccordingtothediagram.

Step3

Usetheshowvlancommandfromprivilegedmodeonanyswitch.Thefollowing

outputisfora2960switch.

ALS1#showvlan

VLANNameStatusPorts

----------------------------------------------------------------------------

1defaultactiveFa0/1,Fa0/2,Fa0/3,Fa0/4

Fa0/5,Fa0/6,Fa0/7,Fa0/8

Fa0/9,Fa0/10,Fa0/11,Fa0/12

Fa0/13,Fa0/14,Fa0/15,Fa0/16

Fa0/17,Fa0/18,Fa0/19,Fa0/20

Fa0/21,Fa0/22,Fa0/23,Fa0/24

Gi0/1,Gi0/2

1002fddi-defaultact/unsup

1003token-ring-defaultact/unsup

1004fddinet-defaultact/unsup

1005trnet-defaultact/unsup

VLANTypeSAIDMTUParentRingNoBridgeNoStpBrdgModeTrans1Trans2

--------------------------------------------------------------------

1enet1000011500-----00

1002fddi1010021500-----00

1003tr1010031500-----00

1004fdnet1010041500---ieee-00

1005trnet1010051500---ibm-00

RemoteSPANVLANs

------------------------------------------------------------------------------

PrimarySecondaryTypePorts

---------------------------------------------------------------------------

3-18CCNP:

Thefollowingoutputisfora3560switch.

DLS1#showvlan

VLANNameStatusPorts

----------------------------------------------------------------------------

1defaultactiveFa0/1,Fa0/2,Fa0/3,Fa0/4

Fa0/5,Fa0/6,Fa0/7,Fa0/8

Fa0/9,Fa0/10,Fa0/11,Fa0/12

Fa0/13,Fa0/14,Fa0/15,Fa0/16

Fa0/17,Fa0/18,Fa0/19,Fa0/20

Fa0/21,Fa0/22,Fa0/23,Fa0/24

Gi0/1,Gi0/2

1002fddi-defaultact/unsup

1003token-ring-defaultact/unsup

1004fddinet-defaultact/unsup

1005trnet-defaultact/unsup

VLANTypeSAIDMTUParentRingNoBridgeNoStpBrdgModeTrans1Trans2

--------------------------------------------------------------------

1enet1000011500-----00

1002fddi1010021500-----00

1003tr1010031500-----00

1004fdnet1010041500---ieee-00

1005trnet1010051500---ibm-00

RemoteSPANVLANs

------------------------------------------------------------------------------

PrimarySecondaryTypePorts

---------------------------------------------------------------------------

NotethatthedefaultVLANnumbers,names,associatedtypes,andallswitch

portsareautomaticallyassignedtoVLAN1.

Youcanusetheshowvlancommandtodeterminethemodeofaport.Ports

configuredforaparticularVLANareshowninthatVLAN.Portsconfiguredto

trunkmodedonotappearinanyoftheVLANs.

Step4

AVTPdomain,alsocalledaVLANmanagementdomain,consistsoftrunkedor

interconnectedswitchesthatareundertheadministrativeresponsibilityofa

switchorswitchesinserverVTPmode.AswitchcanbeinonlyoneVTPdomain

withthesameVTPdomainname.ThedefaultVTPmodeforthe2960and3560

switchesisservermode.VLANinformationisnotpropagateduntiladomain

nameisspecifiedandtrunksaresetupbetweenthedevices.

ThefollowingtabledescribesthethreeVTPmodes.

VTPModeDescription

VTPServerThisisthedefaultVTPmode.VLANscanbecreated,

modified,anddeleted.Otherconfigurationparameters

4-18CCNP:

maybespecifiedforallswitchesintheVTPdomain.VTP

serversadvertiseVLANconfigurationstootherswitches

inthesameVTPdomainandsynchronizeVLAN

configurationswithotherswitchesbasedon

advertisementsreceivedovertrunklinks.

InVTPservermode,VLANconfigurationsaresavedin

NVRAM.

VTPClient

TheswitchlearnsVLANsfromtheswitchinservermode,

withouttheabilitytocreate,change,ordeleteVLANs.

InVTPclientmode,VLANconfigurationsarenotsaved

inNVRAM.

VTPTransparent

SwitchesdonotparticipateinVTP.Theswitchdoesnot

advertiseitsVLANconfigurationanddoesnot

synchronizeitsconfigurationbasedonreceived

advertisements.However,inVTPversion2,transparent

switchesdoforwardVTPadvertisementsthatthey

receivefromotherswitchesfromtheirtrunkinterfaces.

Therefore,localVLANsmaybecreated,modified,and

deletedonaswitchinthetransparentmode.

InVTPtransparentmode,VLANconfigurationsare

savedinNVRAM,buttheyarenotadvertisedtoother

switches.

Usetheshowvtpstatuscommandonanyoftheswitches.Theoutputshould

besimilartothefollowingsampleforDLS1.

DLS1#showvtpstatus

VTPVersion:

ConfigurationRevision:

MaximumVLANssupportedlocally:

1005

NumberofexistingVLANs:

VTPOperatingMode:

Server

VTPDomainName:

VTPPruningMode:

Disabled

VTPV2Mode:

Disabled

VTPTrapsGeneration:

Disabled

MD5digest:

0xBF0x860x940x450xFC0xDF0xB50x70

Configurationlastmodifiedby0.0.0.0at0-0-0000:

00:

LocalupdaterIDis10.1.1.250oninterfaceVl1（lowestnumberedVLAN

interfacefound）

SincenoVLANconfigurationsweremade,allsettingsarethedefaults.Notice

thattheVTPmodeisserver.ThenumberofexistingVLANsisthefivebuilt-in

VLANs.The3560switchsupports1005maximumVLANslocally.The2960

5-18CCNP:

switchsupports255.Theconfigurationrevisioniszero,andtheVTPversionis2.

AllswitchesintheVTPdomainmustrunthesameVTPversion.

TheimportanceoftheconfigurationrevisionnumberisthattheswitchinVTP

servermodewiththehighestrevisionnumberpropagatesVLANinformationover

trunkedports.EverytimeVLANinformationismodifiedandsavedintheVLAN

databaseorvlan.datfile,therevisionnumberisincreasedbyonewhentheuser

exitsfromVLANconfigurationmode.

MultipleswitchesintheVTPdomaincanbeinVTPservermode.Theseswitches

canbeusedtomanageallotherswitchesintheVTPdomain.Thisissuitablefor

small-scalenetworkswheretheVLANinformationissmallandeasilystoredinall

switches.Inalargenetwork,theadministratormustdeterminewhichswitches

makethebestVTPservers.Thenetworkadministratorshouldsetasidesomeof

themorepowerfulswitchesandkeepthemasVTPservers.Theotherswitches

intheVTPdomaincanbeconfiguredasclients.ThenumberofVTPservers

shouldbeconsistentbasedontheamountofredundancydesiredinthenetwork.

Step5

ChangetheVTPdomainnameonDLS1toSWLABusingthevtpdomain

command.ThefollowingisanexampleconfigurationfromDLS1.

DLS1（config）#vtpdomainSWLAB

ChangingVTPdomainnamefromNULLtoSWLAB

DLS1（config）#end

SetuptheswitchessothattheDLswitchesareinVTPservermode,andtheAL

switchesareinVTPclientmode.Thefollowingareexampleconfigurationsfor

DLS1andALS1.

DLS1#configureterminal

Enterconfigurationcommands,oneperline.EndwithCNTL/Z.

DLS1（config）#vtpmodeserver

DevicemodealreadyVTPSERVER.

DLS1（config）#end

ALS1#configureterminal

Enterconfigurationcommands,oneperline.EndwithCNTL/Z.

ALS1（config）#vtpmodeclient

SettingdevicetoVTPCLIENTmode.

ALS1（config）#end

Notethatsincethedefaultmodeisserver,wereceiveamessageonDLS1

statingthatthedevicemodeisalreadyVTPserver.

UsetheshowvtpstatuscommandoneitheroftheALswitches.Theoutput

shouldbesimilartothefollowingsampleforALS1.

DLS1#showvtpstatus

VTPVersion:

ConfigurationRevision:

6-18CCNP:

MaximumVLANssupportedlocally:

1005

Numberofexisting

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