VMware VSHIELD MANAGER 4.1.0 UPDATE 1 - API Manual do Utilizador descarregar pdf (Página 153)

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Appendix C Troubleshooting

To troubleshoot if broadcast packets are being received but unicast packets are being dropped

1Run/opt/vmware/vslad/fence-util setSwitchMode 1onallESXhostsinquestion.Thiscommand

instructsthevshdmoduletobroadcastallfencedpackets.

Ifafterrunningthecommandonallhoststhingsstartworking,mostofthetimes,thismeansthattheissue

lieswithmirrorvirtualmachinesbecausemirrorvirtualmachinesarerequired

tobeconfiguredcorrectly

fortheunicastpacketdeliverytowork.

Formoreonfence-util,see“Detailsofthefence‐utilUtility”onpage 153.

2OneachESXhost,checkthemirrorvirtualmachine’sNICstomakesurethatatleastoneNICisconnected

tothevSwitchtowhichthesevirtual

machinesareconnected.

3ConfirmthatthefilterentriesforthisNICinthemirrorvirtualmachinesVMXfilesarecorrect.Allofthe

entriesforthatvSwitchshouldhavethesameLanId?value.

Afterfixingtheproblem,resetthemodeto0byrunning/opt/vmware/vslad/fence-util

setSwitchMode 0.

4Confirmthatthepacketsare

reachingtheotherESXhost.Ifthemirrorvirtualmachinesare

misconfigured,packetsaredroppedatthedestinationESXhost,notbythesourcehost.

Ifstillthingsarenotworking,thiswouldmostlikelymeanthattheunicastswitchingisbroken

somewhereonthephysicalboxesinthenetwork.This

israrebecauseifbroadcastpacketsarereaching,

thatmeansphysicalconnectivityispresentbetweenthevirtualmachinescommunicatingwitheachother.

Ifbroadcastisworkingandunicastisnotworkingevenafterputtingallvshdmodulesinbroadcastmode

usingfence‐utils,thenproblemsmaybepresentinthephysical

networkforsuchunicasts.

ThereisalsoachanceofmorethanonevShieldManager,PortGroupIsolation,vCenterinstallationson

thesamenetwork.Inthatcase,someofthehostkeyMACaddressesmaygetduplicatedwithinthesame

physicalnetwork.Becauseofthis,thebroadcasttrafficmayworkfine,

buttheunicasttrafficmayreach

thewronghostsbecausethephysicalswitchesonthenetworkmaylearnaboutsameMACfromtwo

differentplaces.

To troubleshoot if no packets are being received and broadcasts are being dropped

1ConfirmthatthetwoESXhostsarepresentonacommonphysicalnetworkandonthesameVLAN.

2Inthecaseoflegacyswitches,confirm

thatthesameportgroupisconnectedtothesamenamedvswitch

onalltheESXhostsinquestion.

3ConfirmthattheNICconnectedtothesevSwitchesconnecttothesamephysicalnetwork.

4Run/opt/vmware/vslad/fence-util infocommandmultipletimesonallESXhoststoseeifany

droppedpacketcountersareincremented.

This

modulealsoshowsdroppedpacketnumbersforunfencedpacketsenteringintofencedvNICs.This

wouldmeanthatalltheotherbroadcastsonthenetworkaredroppedwhentheyreachthefencedvNIC.

LookforFenced From VMandFenced To VM counters.

5Isolatethepointwherepacketsaregettingdroppedbyrunningcapturesonthe

ESXinterfaceatbothends.

IncaseswherepacketsarecomingoutofsourceESXbutarenotreachingthedestinationESX,thereare

rarechancesthatsomeintelligentdeviceinbetweenmaybedroppingthesepacketsbecauseofan

unknownethtypeinthepackets.

Details of the fence-util Utility

Log Levelindicatesdebugloglevel.

HostkeyistheconfiguredhostID.Thereisaprintingmistakeinthefenceutilprogram whereitsattachinga

0attheendofthehostid.hostidof0x30meanshostId3.

Configured LAN MTUsrefertotheexplicitelysetMTUvaluesviavsdh.

1 2 ... 148 149 150 151 152 153 154 155 156 157 158 ... 161 162

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