Lenovo System x3550 M5 - Solving Ethernet Controller Problems; Solving Undetermined Problems

Iftheserverdoesnotstartfromtheminimumconfiguration,see“Power-supplyLEDs”onpage60toreplace
thecomponentsintheminimumconfigurationoneatatimeuntiltheproblemisisolated.
SolvingEthernetcontrollerproblems
ThemethodthatyouusetotesttheEthernetcontrollerdependsonwhichoperatingsystemyouareusing.
Seetheoperating-systemdocumentationforinformationaboutEthernetcontrollers,andseetheEthernet
controllerdevice-driverreadmefile.
Trythefollowingprocedures:
•Makesurethatthecorrectdevicedrivers,whichcomewiththeserverareinstalledandthattheyareat
thelatestlevel.
•MakesurethattheEthernetcableisinstalledcorrectly.
–Thecablemustbesecurelyattachedatallconnections.Ifthecableisattachedbuttheproblem
remains,tryadifferentcable.
–IfyousettheEthernetcontrollertooperateat100Mbps,youmustuseCategory5cabling.
–Ifyoudirectlyconnecttwoservers(withoutahub),orifyouarenotusingahubwithXports,usea
crossovercable.TodeterminewhetherahubhasanXport,checktheportlabel.Ifthelabelcontains
anX,thehubhasanXport.
•Determinewhetherthehubsupportsauto-negotiation.Ifitdoesnot,tryconfiguringtheintegrated
Ethernetcontrollermanuallytomatchthespeedandduplexmodeofthehub.
•ChecktheEthernetcontrollerLEDsontherearpaneloftheserver.TheseLEDsindicatewhetherthere
isaproblemwiththeconnector,cable,orhub.
–TheEthernetlinkstatusLEDislitwhentheEthernetcontrollerreceivesalinkpulsefromthehub.Ifthe
LEDisoff,theremightbeadefectiveconnectororcableoraproblemwiththehub.
–TheEthernettransmit/receiveactivityLEDislitwhentheEthernetcontrollersendsorreceivesdata
overtheEthernetnetwork.IftheEthernettransmit/receiveactivityisoff,makesurethatthehuband
networkareoperatingandthatthecorrectdevicedriversareinstalled.
•ChecktheLANactivityLEDontherearoftheserver.TheLANactivityLEDislitwhendataisactiveon
theEthernetnetwork.IftheLANactivityLEDisoff,makesurethatthehubandnetworkareoperating
andthatthecorrectdevicedriversareinstalled.
•Checkforoperating-system-specificcausesoftheproblem.
•Makesurethatthedevicedriversontheclientandserverareusingthesameprotocol.
IftheEthernetcontrollerstillcannotconnecttothenetworkbutthehardwareappearstobeworking,the
networkadministratormustinvestigateotherpossiblecausesoftheerror.
Solvingundeterminedproblems
IfDynamicSystemAnalysis(DSA)didnotdiagnosethefailureoriftheserverisinoperative,usethe
informationinthissection.
Ifyoususpectthatasoftwareproblemiscausingfailures(continuousorintermittent),see“Software
problems”onpage86
.
CorrupteddatainCMOSmemoryorcorruptedUEFIfirmwarecancauseundeterminedproblems.Toreset
theCMOSdata,usetheCMOSjumpertocleartheCMOSmemoryandoverridethepower-onpassword;
seeTable1“Systemboardjumpers”onpage28formoreinformation.IfyoususpectthattheUEFIfirmware
iscorrupted,see“Recoveringtheserverfirmware(UEFIupdatefailure)”onpage91.
Chapter3.Troubleshooting89