•“Yourcomputercannotconnecttothenetwork”onpage61
•“Theadapterstopsworkingfornoapparentreason”onpage61
•“IfyourcomputerisaGigabitEthernetmodelandyouuseaspeedof1000Mbps,theconnectionfails
orerrorsoccur”onpage62
•“IfyourcomputerisaGigabitEthernetmodel,itcannotconnecttothenetworkat1000Mbps.Instead,
itconnectsat100Mbps”onpage62
Yourcomputercannotconnecttothenetwork
Symptom:Yourcomputercannotconnecttothenetwork.
Actions:Makesur ethat:
•Thecableisinstalledproperly.
ThenetworkcablemustbesecurelyconnectedtoboththeEthernetconnectorofyourcomputerand
theRJ45connectorofthehub.Themaximumallowabledistancefromthecomput ertohubis100
meters.Ifthecableisconnectedandthedistanceiswithinacceptablelimitsbuttheproblempersists,try
adifferentcable.
•Thecableisinstalledproperly.
•Youareusingthecorrectdevicedriver.
OntheWindows7operatingsystem,dothefollowing:
1.ClickStart➙ControlPanel.
2.ClickHardwareandSound.
3.ClickDeviceManager.Ifyouarepromptedforanadministratorpasswordorconrmation,typethe
passwordorprovideconrmation.
4.Ifane xclamationmarkisdisplayednexttoanadapternameunderNetworkadapters,youmightnot
usethecorrectdriverorthedriverisnotenabled.Toupdatethedriver ,right-clickthehighlighted
adapter.
5.ClickUpdateDriverSoftware,andthenfollowtheinstructionsonthescreen.
•Theswitchportandtheadapterhavethesameduplexsetting.
Ifyouconguredtheadapterforfullduplex,makesuretheswitchportisalsoconguredforfullduplex.
Settingthewrongduplexmodecandegradeperformance,causedataloss,orresultinlostconnections.
•Youhaveinstalledallnetworkingsoftwarethatisnecessaryforyournetworkenvironment.
CheckwithyourLANadministratorforthenecessarynetworkingsoftware.
Theadapterstopsworkingfornoapparentreason
Symptom:Theadapterstopsworkingfornoapparentreason.
Action:Thenetworkdriverlesmaybecorruptormissing.Updatethedriverbyreferringtothe“Solution”
descriptionfortheproceduretomakesurethatthecorrectdevicedriverisinstalled.
TheWakeonLANfeatureisnotworking
Symptom:TheWakeonLAN(WOL)featureisnotworking.
Actions:
•MakesurethatWOLisenabledintheBIOSSetupUtilityprogram.
•Ifitis,checkwithyourLANadministrat orforthenecessarysettings.
Chapter10.Troubleshootinganddiagnostics61