Specifications

Basic System Administration
236 VMware, Inc.
SSE3 Considerations
WithintheIntelP4andAMDOpteronprocessorfamilies,VMwareplacesarestriction
betweenprocessorsthatdosupporttheSSE3instructionsandprocessorsthatdonot
supporttheSSE3instructionsbecausetheyareapplicationlevelinstructionsthat
bypassthevirtualizationlayer,andcouldcauseapplicationinstabilityifmismatched
aftera
migrationwithVMotion.
SSSE3 Considerations
WithintheIntelP4andIntelCoreprocessorfamilies,VMwareplacesarestriction
betweenprocessorsthatdosupporttheSSSE3instructionsandprocessorsthatdonot
supporttheSSSE3instructionsbecausetheyareapplicationlevelinstructionsthat
bypassthevirtualizationlayer,andcouldcauseapplicationinstabilityifmismatched

afteramigrationwithVMotion.
Networking Requirements
1VMotionrequiresaGigabitEthernetnetworktoensurerapidmigration:
 Adedicatednetworkisrecommendedtokeepvirtualmachinememorystate
secure.
 VMotionrequiresaprivateGigabitEthernetmigrationnetworkbetweenallof
theVMotion‐enabledmanagedhosts.WhenVMotionisenabledona
managedhost,configureauniquenetworkidentityobjectforthemanaged
hostandconnectittotheprivatemigrationnetwork.
 Twohostswithcross‐connectedGigEcardscanbeusedfordemopurposes.
2Virtualmachinesmusthaveaccesstothesamesubnetsonthesourceand
destinationESXServerhosts.
3NetworklabelsforeachvirtualNICmustbecreatedthroughtheESXServer
configurationsettings:
 Networklabelsareglobalacrossdatacenters.
 VMotionautomaticallymapsvirtualmachinestoappropriatevirtualNICs
basedonnetworklabels.
 ForESXServer2.xhosts,networklabelscanbeconfiguredthroughthe
Web‐basedVMwareManagementInterface.
N
OTEVMwareisworkingonmaintainingVMotioncompatibilityacrossthewidest
rangeofprocessorsthroughpartnershipswithprocessorandhardwarevendors.For
additionalinformation,checktheVMwareKnowledgeBase.