Trendnet TEG-S2620i Owner's manual

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TABLEOFCONTENTS

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TABLEOFCONTENTS ................................................................................................................................................................................... 2

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1 GETTINGSTARTED ............................................................................................................................................................................... 4

1.1 CONNECTINGTOTHESWITCHCONSOLEPORT ......................................................................................................................................4

1.2 PCCOMPORTSETTING ..................................................................................................................................................................4

1.3 CONNECTINGTOTHESWITCHWEBPORT ............................................................................................................................................4

1.4 SWITCHFUNCTIONFEATURES ...........................................................................................................................................................5

2 OPERATIONNOTICE ............................................................................................................................................................................ 6

2.1 COMMANDLINEEDITING .................................................................................................................................................................6

2.2 COMMANDHELP ............................................................................................................................................................................7

2.3 HOWTOUSELOADER .....................................................................................................................................................................8

2.3.1Connectswitch ...................................................................................................................................................... 8

2.3.2Enterloader .......................................................................................................................................................... 8

2.3.3Commandsinloader ............................................................................................................................................. 8

3 LOGIN ................................................................................................................................................................................................ 13

3.1 POWER‐ONSELF‐TESTING .............................................................................................................................................................13

3.2 CONSOLELOGIN ...........................................................................................................................................................................13

3.3 WEBLOGIN .................................................................................................................................................................................13

3.3.1 SettingIPAddressbyConsolePort ..................................................................................................................... 13

3.3.2 LoginwithaWebBrowser ................................................................................................................................. 13

4 CONSOLEUSERINTERFACE ............................................................................................................................................................... 15

4.1 SYSTEMCOMMANDS ....................................................................................................................................................................15

4.2 SWITCHSTATICCONFIGURATION .....................................................................................................................................................16

4.2.1 PortConfigurationandStatus ........................................................................................................................... 16

4.2.2 Trunk ............................................................................................................................................................... 18

4.2.3 VLAN ............................................................................................................................................................... 20

4.2.4 MiscConfiguration ........................................................................................................................................... 27

4.2.5 Administration ................................................................................................................................................. 27

4.2.5 Administration ................................................................................................................................................. 28

4.2.6 PortMirroring .................................................................................................................................................. 29

4.2.7 QualityofService .............................................................................................................................................. 30

4.2.8 MACAddressTable ........................................................................................................................................... 32

4.2.9 MACLimit ........................................................................................................................................................ 33

4.3 PROTOCOLRELATEDCONFIGURATION ..............................................................................................................................................34

4.3.1 STP/RSTP ......................................................................................................................................................... 34

4.3.2 MSTP ............................................................................................................................................................... 36

4.3.3 SNMP .............................................................................................................................................................. 39

4.3.4 IGMP ............................................................................................................................................................... 42

4.3.5 802.1x ............................................................................................................................................................. 43

4.3.6 DHCPRelay&Option82 ................................................................................................................................... 45

4.3.7 LLDP ................................................................................................................................................................ 47

4.4 SYSLOG ......................................................................................................................................................................................49

4.5 REBOOTSWITCH ...........................................................................................................................................................................49

4.5.1 ResettoDefault ............................................................................................................................................... 49

4.5.2 Restart............................................................................................................................................................. 49

4.6 TFTPFUNCTION ..........................................................................................................................................................................49

4.6.1 TFTPFirmwareUpdate ...................................................................................................................................... 49

4.6.2 RestoreConfigureFile ....................................................................................................................................... 49

4.6.3 BackupConfigureFile ....................................................................................................................................... 49

4.7 ACCESSCONTROLLIST ...................................................................................................................................................................50

4.7.1 IPv4ACLcommands .......................................................................................................................................... 50

4.7.2 Non‐IPv4ACLcommands ................................................................................................................................... 51

4.7.3 SIP/SMACBinding ............................................................................................................................................. 52

5 WEBUSERINTERFACE ....................................................................................................................................................................... 53

5.1 MAINMENU ...............................................................................................................................................................................53

5.2 ADMINISTRATION .........................................................................................................................................................................53

5.2.1 IPAddressSetting ............................................................................................................................................. 54

5.2.2 SwitchSetting .................................................................................................................................................. 54

5.2.3 ConsolePortInformation .................................................................................................................................. 56

5.2.4 PortConfiguration ............................................................................................................................................ 57

5.2.5 SNMPConfiguration ......................................................................................................................................... 61

5.2.6 Syslog .............................................................................................................................................................. 65

5.2.7 FirmwareUpdate ............................................................................................................................................. 66

5.2.8 ConfigurationBackup ....................................................................................................................................... 68

5.3 L2FEATURES ...............................................................................................................................................................................69

5.3.1 VLANConfiguration .......................................................................................................................................... 69

5.3.2 Trunking .......................................................................................................................................................... 77

5.3.3 ForwardingandFiltering ................................................................................................................................... 80

5.3.4 SpanningTree .................................................................................................................................................. 85

5.3.5 DHCPRelayandOption82 ................................................................................................................................ 92

5.3.6 LLDP ................................................................................................................................................................ 93

5.4 ACCESSCONTROLLIST ...................................................................................................................................................................95

5.4.1 IPv4 ................................................................................................................................................................. 96

5.4.2 Non‐IPv4 .......................................................................................................................................................... 98

5.4.3 Binding ............................................................................................................................................................ 99

5.4.4 QoSVoIP ........................................................................................................................................................ 100

5.5 SECURITY ..................................................................................................................................................................................101

5.5.1 SecurityManager ........................................................................................................................................... 101

5.5.2 MACLimit ...................................................................................................................................................... 102

5.5.3 802.1xConfiguration ...................................................................................................................................... 103

5.6 QOS ........................................................................................................................................................................................105

5.6.1 QoSConfiguration .......................................................................................................................................... 105

5.6.2 Per‐PortConfiguration .................................................................................................................................... 106

5.7 MONITORING ............................................................................................................................................................................107

5.7.1 PortStatus ..................................................................................................................................................... 107

5.7.2 PortStatistics ................................................................................................................................................. 108

5.8 RESETSYSTEM ...........................................................................................................................................................................108

5.9 REBOOT ....................................................................................................................................................................................108

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1 GettingStarted

ThanksforusingthefirmwareforconfiguringEP‐5926.Thereistwowaystoaccesstheswitchmanagement.YoucanusetheConsole

modelocalmanagementandWeb‐basedinterfacemanagement.

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1.1 ConnectingtotheSwitchConsolePort

y UserscanuseaRS‐232non‐crossoverserialcabletoconnectthePC’sCOMporttotheswitchconsoleport.

y TheswitchsystemprovidestheRS‐232interfacewithbaudrate115200‐8‐n‐1.

y Useterminalemulationprogram(e.g.WindowsHyperTerminal…)toconfiguretheswitchsystem.

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RS-232 cable

PC System

Switch System

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1.2 PCCOMPortSetting

y Baudrate=115200

y Databits=8

y Parity=None

y Stop bits=1

y Flowcontrol=None

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1.3 ConnectingtotheSwitchWebPort

y UserscanuseaCAT‐5/6cabletoconnectthePC’sLANporttooneoftheswitchEthernetport.

y Usewebbrowserprogram(e.g.InternetExplorer,MozillaFirefox)toconfiguretheswitchsystem.

y Seesection3.3.Webloginforexhaustivelogininformation.

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PC System

Switch System

CAT-5/6 cable

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1.4 SwitchFunctionFeatures

Thissystemprovidesthefollowingfunctionfeaturestofacilitatenetworkmanagement,security andcontrols:

 2410/100MbpsRJ‐45portsand210/100/1000Mbpsmoduleports

 1serial(RS‐232)portforconsolemanagement

 Supportupto9KBjumboframe

 Commandlineinterface(CLI)andbrowse‐independent,securedweb‐basedmanagements(HTTPS)

 Upto13‐groupand8‐memberpergroupofstaticandLACPlinkaggregation(trunk)

 Upto512‐groupofport‐basedandtag‐based(802.1q) VLAN

 GVRPfortag‐basedVLAN

 Per‐portstormcontrolforfloodedunicast,multicast,IPmulticast,broadcastandcontrolpackets

 Spanning‐treeprotocols:STP(802.1d),RSTP(802.1w),MSTP(802.1s)

 IGMPSnooping&Query(IGMPv1/v2)

 SNMPv1/v2c/v3managementandtrapfunction

 SupportMIBtables:MIB‐II(RFC1213),BridgeMIBs(RFC1493),Ethernet‐likeMIB(RFC1643&RFC2665),private‐MIB,USM‐MIB

(RFC2574),VACM‐MIB(RFC2575)andRMON‐MIB1,2,3,9groups(RFC1757&RFC2819)

 Telnet/SSHfunctionforremoteconsolemanagement(SSHwillbeavailablesoon)

 TFTPandHTTPfirmwareupdateandconfigurationbackup/restore

 RemoteSyslogfunction

 StaticanddynamicMACtablemanagement

 MACfilteringfunction

 MAClimitfunction

 Portsniffer(mirroring)

 Forwardingscope(Protectedport)

 Portstatus,control,securityandstatistics

 StaticorDHCP(dynamic)IPaddresssetting

 DHCPrelay&option82function

 Ingressandegressratecontrolwith128Kbpsresolution

 QoSwith8‐levelportpriorityto4‐levelqueuemappingandstrict/802.1p/WRRpriorityoptions

 Userloginmanagement

 802.1xportaccesscontrolsupportingEAP‐MD5,EAP‐TLSandEAP‐PEAPauthenticationtypes

 Layer2/3/4accesscontrollist(ACL)with220ruleentries

 SourceIP‐MACandportbindingaccesscontrol

 Q‐in‐QVLANfunction

 LLDPprotocol

2 OperationNotice

Toenterthe“configuration”mode,youneedtobeintheprivilegedmode,andthentypethecommandconfigure



Switch#configure

Switch(config)#

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2.1 CommandLineEditing

Thefollowinggenericfunctionkeysprovidefunctionsinallofthemenus:



Keys Function

<Ctrl>‐B;← Movesthecursorbackonecharacter.

<Ctrl>‐D Deletesthecharacteratthecursor.

<Ctrl>‐E Jumpstotheendofthecurrentcommandline.

<Ctrl>‐F;→ Movesthecursorforwardonecharacter.

<Ctrl>‐K Deletesfromthecursortotheendofthecommandline.

<Ctrl>‐N;↓ Entersthenextcommandlineinthecommandhistory.

<Ctrl>‐P;↑ Entersthepreviouscommandlineinthecommandhistory.

<Ctrl>‐U Deletesfromthecursortothebeginningofthecommandline.

<Ctrl>‐W Deletesthelastwordtyped.

<Esc>B Movesthecursorbackwardoneword.

<Esc>D Deletesfromthecursortotheendoftheword.

<Esc>F Movesthecursorforwardoneword.

<Backspace> Deletethecharacterbeforethecursor.

<Del> Deletethecharacteratthecursor.



2.2 CommandHelp

Youmayenter?atanycommandmode,and theCLIwillreturnpossiblecommandsatthatpoint,alongwithsomedescriptionofthe

keywords:

Switch(config)#copytftp?

running‐config Runningconfigurations

flash  Flashconfigurations

firmware Downloadfirmware



Youmayusethe<Tab>keytodokeywordautocompletion:

Switch(config)#copytftpr<Tab>

Switch(config)#copytftprunning‐config



Youdonotneedtotypeintheentirecommands;youonlyneedtotypeinenoughcharactersfortheCLItorecognizethecommand

asunique.Thefollowingexampleshowsyouhowtoentertheshowrunning‐configcommand:

Switch(config)#shru



2.3 HowtoUseLoader

2.3.1Connectswitch

UsethefollowingsettingtoconnectPCtoSwitchwithRS‐232cable:

BaudRate 115200

DataBits 8

Parity None

Stopbits 1

FlowControl None

PCneedstoconnectoneoftheSwitchEthernetportwithaCAT‐5/5e/6cableifloaderorfirmwareimageneedstobeupdated

throughTFTPinloadermode.

2.3.2Enterloader

SettheHyperTerminalastoptableandopentheHyperTerminalfirst.PowerontheSwitchand pressanykeytoenterintotheloader

modewhencountdownmessageisshownup.Thenswitchentersintotheloadermodewhenthepromptisshown.



2.3.3Commandsinloader

 ?–aliasfor'help'.Tolistallavailablecommandsinloader



Forexample:



 tftpupdate–toupdatefirmwareorloaderimagethroughTFTPnetworktransfer



Loader#tftpupdateImageFileNameTftpServerIPTargetBoardIP[loader]



UpdateimagevianetworkusingTFTPprotocolwithspecifiedparameters:

ImageFileName–thenewfirmware/loaderimagefileforupdate.

TftpServerIP–thePC’sIPwhohasTFTPserverservice.

TargetBoardIP–theswitch’sIPyoucansetit.

loader–ifupdateloaderitneeded,ifupdatefirmwareitnotneeded.



Forexample,toupdateloaderimagefilewithTFTP,PCshouldhaveTFTPserverandopenit.

Enterthecommand:

Loader#tftpupdateloader_v3.2.2.img192.168.223.119192.168.223.1loader



TFTPtransferisdone.Thenthenewimagewillbewrittenintotheflashifimagechecksumisverified.



Poweroffandontheswitchtoactivatethenewloader.



AnotherexampleistoupdatenewfirmwarefilewithTFTPinloader.PCshouldhaveTFTPserverandopenit.

Enterthecommand:

Loader#tftpupdateimage.2510.img192.168.223.119192.168.223.1



TFTPtransferisdone.Thenthenewimagewillbewrittenintotheflashifimagechecksumisverified.



Afterflashwritingiscompleted,systemwillbeautomaticallyrebootedtostartthenewfirmwareimage:



 kermit–toupdatefirmwareorloaderimagethroughserial(RS‐232)linetransferinKermitmode



Loader#kermit[loader]‐updateimagefileoverserialline(kermitmode) 

loader–ifupdateloaderitneeded,ifupdatefirmwareitnotneeded.



Hereisanexampletousetheseriallinetoupdatenewloader:

Loader#kermitloader



Selectsendfile:filenameselecttheloaderimage“armboot.bin.img”toupdate,Protocol“kermit”.



PressSendbutton



ThefollowingnextmessageswillbeshownwhenKermittransferiscompleted.



Successfullyupdatetheloader.Finallypoweroffandontoactivatethenewloader.



Forupdatingnewfirmwareimageoverserialline,usethefollowingcommand:



Justlikethedescriptionsofloaderimageupdating,sendtheselectedfirmwareimagefile“image.2510.img”thenwaitforthe

updatingprocedureisdoneandthesystemwillberebootedtoactivatethenewfirmwareservice.



 version–printmonitorversion



 help<command>–printmonitorversion

command–thecommandinloader



Forexample:



3 Login

3.1 Power‐OnSelf‐Testing

Thepower‐onself‐testingisrunningimmediatelyaftertheswitchsystemispoweredup.Theself‐testingprogramdiagnosesthe

hardwarecomponentsofaswitchsystem.Afterhardwaretestsareallpassed,thesystemwilldetectanddisplaythemoduleslot

statusandstarttheinitializations.Thesystemwillbeinreadystatewhilethepromptisshowingup.



3.2 ConsoleLogin

Whenyouconnecttotheswitchwithaterminalemulationprogram,aloginscreenisdisplayed.Enterausernameandpasswordto

logintoaccesstheswitch.



Items Option DefaultValue

Username Max:6,Min:1characters,casesensitive admin

Password Max:6,Min:1characters,casesensitive 123



3.3 WebLogin

3.3.1 SettingIPAddressbyConsolePort

Whenyouaregoingtologinaswitchthroughthewebpage,youhavetoconfiguretheIPaddressfirst.ThedefaultIPaddress/

netmask/defaultgatewayofaswitchis192.168.223.100/255.255.255.0/ 192.168.223.254,withoutmakinganyconfiguration

changesinadvance,youcanloginaswitchwithdefaultIPaddressaslongasthedefaultIPaddresscanfunctionproperlyinyour

networkenvironment.Otherwise,youhavetore‐configuretheIPaddress,subnetmaskanddefaultgateway.Thefollowingshow

howtoconfiguretheIPaddressofaswitch.



First,loginwiththeconsoleport.



Second,youwillnowenterthe“IPAddress”,then,setuptheIPaddress,subnetmaskandgateway.



3.3.2 LoginwithaWebBrowser

Whenyouconnecttotheswitchthroughawebbrowser,aloginscreenisdisplayed.Enterausernameandpasswordtologinto

accesstheswitch.

Username: admin

Password:

Switch#

Switch(config)# ip address 192.168.1.1 255.255.255.0

Switch

(

confi

g)

# i

p

default-

g

atewa

y

192.168.1.254

=======================================

24 + 2 Switch Module Slot Information

=======================================

Slot 1 .... Yes

Slot 2 .... Yes

=======================================

Username:

Username: admin

Password:

Switch#



Items Option DefaultValue

Username Max:6,Min:1characters,casesensitive admin

Password Max:6,Min:1characters,casesensitive 123



Afteruserloginverification,thehomepageoftheswitchwillbeshownasbelow.



4 ConsoleUserInterface

4.1 SystemCommands

showrunning‐config

Displaytherunningconfigurationoftheswitch.



copyrunning‐configstartup‐config

Backuptheswitchconfigurations.



erasestartup‐config

Resettodefaultfactorysettingsatnextboottime.



cleararp[<ip‐addr>]ClearentriesintheARPcache.

Parameters:

[<ip‐addr>]specifiestheIPaddresstobecleared.IfnoIPaddressisentered,theentireARPcacheiscleared.



showarp

ShowtheIPARPtranslationtable.



pingip‐addr[<1..999>]SendICMPECHO_REQUESTtonetworkhosts.

Parameters:

[<1..999>]specifiesthenumberofrepetitions.Ifnotentered,itwillcontinuetoping untilyoupress<Ctrl>‐Ctostop.



[no]per‐vlan‐flooding‐portmaskEnableordisableperVLANdefaultfloodingportmask.



per‐vlan‐flooding‐portmask<unicast|multicast><vlan‐id><port‐list>SetunicastormulticastperVLANdefaultfloodingportmask.



showper‐vlan‐flooding‐portmask

DisplayunicastandmulticastperVLANdefaultfloodingportmasktable.

4.2 SwitchStaticConfiguration

4.2.1 PortConfigurationandStatus

portstate<on|off>[<port‐list>]

Turntheportstateonoroff.

Parameters:

<port‐list>specifiestheportstobeturnonoroff.Ifnotentered,allportsareturnonoroff.



portnego<force|auto|nway‐force>[<port‐list>]

Setportnegotiation.

Parameters:

<port‐list>specifiestheportstobeset.Ifnotentered,allportsareset.



portspeed<10|100|1000><full|half>[<port‐list>]

Setportspeed(inmbps)andduplex.

Parameters:

<port‐list>specifiestheportstobeset.Ifnotentered,allportsareset.



portflow<enable|disable><enable|disable>[<port‐list>]

Enableordisableportflowcontrol.

Parameters:

1

st

<enable|disable>enablesordisablesflowcontrolinfullduplexmode.

2

nd

<enable|disable>enablesordisablesflowcontrolinhalfduplexmode.

<port‐list>specifiestheportstobeset.Ifnotentered,allportsareset.



portrate<ingress|egress><0..8000>[<port‐list>]

Setporteffectiveingressoregressrate.

Parameters:

<0..8000>specifiestheingressoregressrate.<0..8000>

<port‐list>specifiestheportstobeset.Ifnotentered,allportsareset.



portsecurity<on|off>[<port‐list>]

Setportpriority.Whenportsecurityison,theportwillstopMACaddresslearning,andforwardonlypacketswithMACaddressin

thestaticMACaddresstable.

Parameters:

<port‐list>specifiestheportstobeset.Ifnotentered,allportsareset.



portprotectedgroup<1‐2><port‐list>

Setprotectedportgroupmember.

Parameters:

<port‐list>specifiesthegroupmemberports.



portprotected<port‐list>

Setprotectedportlist.

Parameters:

<port‐list>specifiestheprotectedportlist.



portpriority<disable|low|high>[<port‐list>]

Setportpriority.

Parameters:

<port‐list>specifiestheportstobeset.Ifnotentered,allportsareset.



portjumboframe<enable|disable>[<port‐list>]

Setportjumboframe.Whenportjumboframeisenable,theportforwardjumboframepacket

Parameters:

<port‐list>specifiestheportstobeset.Ifnotentered,allportsareset.



showportstatus

Showportstatus,includingportState,Link,Trunking,VLAN,Negotiation,Speed,Duplex,Flowcontrol,Ratecontrol,Priority,Security,BSF

control.



showportstatistics<port‐id>

Showportstatistics,includingTxGoodPkt,TxBadPkt,RxGoodPkt,RxBadPkt,TxAbort,Collision,andDropPkt.

Parameters:

<port‐id>specifiestheporttobeshown.



showportprotection

Showprotectedportinformation.

4.2.2 Trunk

Trunkallowstheswitchtocombineportssothattheyfunctionlikeasinglehigh‐speedlink.Itcanbeusedtoincreasethebandwidth

tosomedevicestoprovideahigh‐speedlink.Forexample,trunkisusefulwhenmakingconnectionsbetweenswitchesorconnecting

serverstotheswitch.Trunkcanalsoprovidearedundantlinkforfaulttolerance.Ifonelinkinthetrunkfailed,theswitchcanbalance

thetrafficamongtheremaininglinks.



NOTE:

1:The10/100Mbpsportcannotbetrunkedwithgigabitport(port25~26).

2:Allportsinthesametrunkgroupwillbetreatedasasingleport.If atrunkgroupexists,theportsbelongingtothattrunkwillbe

replacedby“TRUNK#”intheVLANconfigurationscreen.Thefollowingexampleconfiguresport25~26as“TRUNK1.”



4.2.2.1 TrunkingCommands

showtrunk

Showtrunkinginformation.



trunkadd<trunk‐id><lacp|no‐lacp><port‐list><active‐port‐list>

Addanewtrunkgroup.

Parameters:

<trunk‐id>specifiesthetrunkgrouptobeadded.

<lacp>specifiestheaddedtrunkgrouptobeLACPenabled.

<no‐lacp>specifiestheaddedtrunkgrouptobeLACPdisabled.

<port‐list>specifiestheportstobeset.

<active‐port‐list>specifiestheportstobesettoLACPactive.



notrunk<trunk‐id>

Deleteanexistingtrunkgroup.

Parameters:

<trunk‐id>specifiesthetrunkgrouptobedeleted.



4.2.2.2 LACPCommands

[no]lacp

Enable/disableLACP.



lacpsystem‐priority<1..65535>

SetLACPsystempriority.

Parameters:

<1..65535>specifiestheLACPsystempriority.



nolacpsystem‐priority

SetLACPsystemprioritytothedefaultvalue32768.



showlacpstatus

ShowLACPenable/disablestatusandsystempriority.



showlacp

ShowLACPinformation.



showlacpagg<trunk‐id>

ShowLACPaggregatorinformation.

Parameters:

<trunk‐id>specifiesthetrunkgrouptobeshown.



showlacpport<port‐id>

ShowLACPinformationbyport.

Parameters:

<port‐id>specifiestheporttobeshown.



NOTE:IfVLANgroupexist,allofthemembersofstatictrunkgroupmustbeinsameVLANgroup.

4.2.3 VLAN

4.2.3.1 VirtualLANs

AVirtualLAN(VLAN)isalogicalnetworkgroupthatlimitsthebroadcastdomain.Itallowsyoutoisolatenetworktrafficsoonly

membersoftheVLANreceivetrafficfromthesameVLANmembers.Basically,creatingaVLANwithinaswitchislogicallyequivalent

ofreconnectingagroupofnetworkdevicestoanotherLayer2switch.However,allthenetworkdevicesarestillpluggedintothe

sameswitchphysically.Astationcanbelongtomorethan oneVLANgroup.VLANpreventsusersfromaccessingnetworkresources

ofanotheronthesameLAN,thustheuserscannotseetheharddisksandprintersofanotheruserinthesamebuilding.VLANcan

alsoincreasethenetworkperformancebyreducingthebroadcasttrafficandenhancethesecurityofthenetworkbyisolatinggroups.



ThisSwitchsupportstwotypesofVLANs:

• Port‐based

• IEEE802.1Q(tag)‐based

OnlyoneofthetwoVLANtypescanbeenabledatonetime.



Port‐basedVLANsareVLANswherethepacketforwardingdecisionismadebased onthedestinationMACaddressanditsassociated

port.Youmustdefinetheoutgoingportsallowedforeachportwhenyouuseport‐basedVLANs.Inport‐basedVLANs,thepackets

receivedfromoneportcanonlybesenttotheportswhichareconfiguredtothesameVLAN.Asshowninthefollowingfigure,the

switchadministratorconfiguredport1~2asVLAN1andport3~4asVLAN2.Thepacketsreceivedfromport1canonlybeforwarded

toport2.Thepacketsreceivedfromport2canonlybeforwardedtoport1.ThatmeansthecomputerAcansendpacketsto

computerB,andviceversa.ThesamesituationalsooccurredinVLAN2.ThecomputerCandDcancommunicatewitheachother.

However,thecomputersinVLAN1cannotseethecomputersinVLAN2sincetheybelongedtodifferentVLANs.



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