6.0
Table Of Contents
- vSphere Command-Line Interface Concepts and Examples
- Contents
- About This Book
- vSphere CLI Command Overviews
- Introduction
- List of Available Host Management Commands
- Targets and Protocols for vCLI Host Management Commands
- Supported Platforms for vCLI Commands
- Commands with an esxcfg Prefix
- ESXCLI Overview
- Connection Options for vCLI Host Management Commands
- Connection Options for DCLI Commands
- vCLI Host Management Commands and Lockdown Mode
- Managing Hosts
- Managing Files
- Managing Storage
- Introduction to Storage
- Examining LUNs
- Detaching Devices and Removing a LUN
- Working with Permanent Device Loss
- Managing Paths
- Managing Path Policies
- Scheduling Queues for Virtual Machine I/O
- Managing NFS/NAS Datastores
- Monitoring and Managing SAN Storage
- Monitoring and Managing Virtual SAN Storage
- Monitoring vSphere Flash Read Cache
- Monitoring and Managing Virtual Volumes
- Migrating Virtual Machines with svmotion
- Configuring FCoE Adapters
- Scanning Storage Adapters
- Retrieving SMART Information
- Managing iSCSI Storage
- iSCSI Storage Overview
- Protecting an iSCSI SAN
- Command Syntax for esxcli iscsi and vicfg-iscsi
- iSCSI Storage Setup with ESXCLI
- iSCSI Storage Setup with vicfg-iscsi
- Listing and Setting iSCSI Options
- Listing and Setting iSCSI Parameters
- Enabling iSCSI Authentication
- Setting Up Ports for iSCSI Multipathing
- Managing iSCSI Sessions
- Managing Third-Party Storage Arrays
- Managing NMP with esxcli storage nmp
- Path Claiming with esxcli storage core claiming
- Managing Claim Rules
- Managing Users
- Managing Virtual Machines
- vmware-cmd Overview
- Listing and Registering Virtual Machines
- Retrieving Virtual Machine Attributes
- Managing Virtual Machine Snapshots with vmware-cmd
- Powering Virtual Machines On and Off
- Connecting and Disconnecting Virtual Devices
- Working with the AnswerVM API
- Forcibly Stopping Virtual Machines with EXCLI
- Managing vSphere Networking
- Introduction to vSphere Networking
- Retrieving Basic Networking Information
- Network Troubleshooting
- Setting Up vSphere Networking with vSphere Standard Switches
- Setting Up Virtual Switches and Associating a Switch with a Network Interface
- Retrieving Information About Virtual Switches
- Adding and Deleting Virtual Switches
- Checking, Adding, and Removing Port Groups
- Managing Uplinks and Port Groups
- Setting the Port Group VLAN ID
- Managing Uplink Adapters
- Adding and Modifying VMkernel Network Interfaces
- Setting Up vSphere Networking with vSphere Distributed Switch
- Managing Standard Networking Services in the vSphere Environment
- Setting the DNS Configuration
- Adding and Starting an NTP Server
- Managing the IP Gateway
- Setting Up IPsec
- Managing the ESXi Firewall
- Monitoring VXLAN
- Monitoring ESXi Hosts
- Index
VMware, Inc. 79
Chapter 5 Managing iSCSI Storage
Listing and Setting iSCSI Parameters with ESXCLI
YoucanretrieveandsetiSCSIparametersbyrunningoneofthefollowingcommands.
Table 5‐6listsallsettableparameters.TheseparametersarealsodescribedintheIETFrfc3720.Youcanrun
esxcli iscsi adapter param gettodeterminewhetheraparameterissettableornot.
TheparametersinTable 5‐6applytosoftwareiSCSIanddependenthardwareiSCSI.
YoucanusethefollowingESXCLIcommandstolistparameteroptions.
Runesxcli iscsi adapter param gettolistparameteroptionsfortheiSCSIadapter.
Runesxcli iscsi adapter discovery sendtarget param getoresxcli iscsi adapter target
portal param settoretrieveinformationaboutiSCSIparametersandwhethertheyaresettable.
Runesxcli iscsi adapter discovery sendtarget param getoresxcli iscsi adapter target
portal param settosetiSCSIparameteroptions.
Ifspecialcharactersareinthe<name>=<value>sequence,forexample,ifyouaddaspace,youmustsurround
thesequencewithdoublequotes(“<name> = <value>”).
Adapter‐level
parameters
esxcli iscsi adapter param set --adapter=<vmhba> --key=<key> --value=<value>
Target‐level
parameters
esxcli iscsi adapter target portal param set --adapter=<vmhba> --key=<key>
--value=<value> --address=<address> --name=<iqn.name>
Discovery‐level
parameters
esxcli iscsi adapter discovery sendtarget param set --adapter=<vmhba>
--key=<key> --value=<value> --address=<address>
Table 5-5. Settable iSCSI Parameters
Parameter Description
DataDigestType Increasesdataintegrity.Whendatadigestisenabled,thesystemperformsachecksumover
eachPDUsdatapartandverifiesusingtheCRC32Calgorithm.
Note:SystemsthatuseIntelNehalemprocessorsoffloadtheiSCSIdigestcalculationsfor
softwareiSCSI,thusreducingtheimpactonperformance.
ValidvaluesaredigestProhibited,
digestDiscouraged,digestPreferred,or
digestRequired.
HeaderDigest Increasesdataintegrity.Whenheaderdigestisenabled,thesystemperformsachecksumover
theheaderpartofeachiSCSIProtocolDataUnit(PDU)andverifiesusingtheCRC32C
algorithm.
MaxOutstandingR2T MaxOutstandingR2TdefinestheReadytoTransfer(R2T)PDUsthatcanbein
transitionbefore
anacknowledgementPDUisreceived.
FirstBurstLength MaximumamountofunsoliciteddataaniSCSIinitiatorcansendtothetargetduringthe
executionofasingleSCSIcommand,inbytes.
MaxBurstLength MaximumSCSIdatapayloadinaData‐InorasolicitedData‐OutiSCSIsequence,inbytes.
MaxRecvDataSegLen Maximumdatasegment
length,inbytes,thatcanbereceivedinaniSCSIPDU.
NoopOutInterval Timeinterval,inseconds,betweenNOP‐OutrequestssentfromyouriSCSIinitiatortoaniSCSI
target.TheNOP‐Outrequestsserveasthepingmechanismtoverifythataconnectionbetween
theiSCSIinitiatorandtheiSCSItarget
isactive.
Supportedonlyattheinitiatorlevel.
NoopOutTimeout Amountoftime,inseconds,thatcanlapsebeforeyourhostreceivesaNOP‐Inmessage.The
messageissen tbytheiSCSItargetinresponsetotheNOP‐Outrequest.Whenthe
NoopTimeoutlimitisexceeded,theinitiatorterminatesthecurrentsession
andstartsanew
one.
Supportedonlyattheinitiatorlevel.
RecoveryTimeout Amountoftime,inseco nds,thatcanlapsewhileasessionrecoveryisperformed.Ifthetimeout
exceedsitslimit,theiSCSIinitiatorterminatesthesession.
DelayedAck Allowssystemstodelayacknowledgmentofreceiveddatapackets.