6.5
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 Commands Available on Different ESXi Hosts
- Trust Relationship Requirement for ESXCLI Commands
- Using ESXCLI Output
- 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
- Detach a Device and Remove a LUN
- Reattach a Device
- Working with Permanent Device Loss
- Managing Paths
- Managing Path Policies
- Scheduling Queues for Virtual Machine I/O
- Managing NFS/NAS Datastores
- Monitor and Manage FibreChannel 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
- Set Up Ports for iSCSI Multipathing
- Managing iSCSI Sessions
- Managing Third-Party Storage Arrays
- Managing Users
- Managing Virtual Machines
- Managing vSphere Networking
- Introduction to vSphere Networking
- Retrieving Basic Networking Information
- Troubleshoot a Networking Setup
- 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
- Managing VMkernel Network Interfaces with ESXCLI
- Add and Configure an IPv4 VMkernel Network Interface with ESXCLI
- Add and Configure an IPv6 VMkernel Network Interface with ESXCLI
- Managing VMkernel Network Interfaces with vicfg-vmknic
- Add and Configure an IPv4 VMkernel Network Interface with vicfg-vmknic
- Add and Configure an IPv6 VMkernel Network Interface with vicfg-vmknic
- Setting Up vSphere Networking with vSphere Distributed Switch
- Managing Standard Networking Services in the vSphere Environment
- Setting the DNS Configuration
- Manage an NTP Server
- Manage the IP Gateway
- Setting Up IPsec
- Manage the ESXi Firewall
- Monitor VXLAN
- Monitoring ESXi Hosts
- Index
Parameter Type Command
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>
The following table lists all seable parameters. These parameters are also described in the IETF rfc 3720.
You can run esxcli iscsi adapter param get to determine whether a parameter is seable or not.
The parameters in the table apply to software iSCSI and dependent hardware iSCSI.
Table 5‑5. Settable iSCSI Parameters
Parameter Description
DataDigestType
Increases data integrity. When data digest is enabled, the system performs a
checksum over each PDUs data part and veries using the CRC32C algorithm.
N Systems that use Intel Nehalem processors ooad the iSCSI digest
calculations for software iSCSI, thus reducing the impact on performance.
Valid values are digestProhibited, digestDiscouraged,
digestPreferred, or digestRequired.
HeaderDigest
Increases data integrity. When header digest is enabled, the system performs a
checksum over the header part of each iSCSI Protocol Data Unit (PDU) and
veries using the CRC32C algorithm.
MaxOutstandingR2T
Max Outstanding R2T denes the Ready to Transfer (R2T) PDUs that can be in
transition before an acknowledgement PDU is received.
FirstBurstLength
Maximum amount of unsolicited data an iSCSI initiator can send to the target
during the execution of a single SCSI command, in bytes.
MaxBurstLength
Maximum SCSI data payload in a Data-In or a solicited Data-Out iSCSI
sequence, in bytes.
MaxRecvDataSegLen
Maximum data segment length, in bytes, that can be received in an iSCSI
PDU.
NoopOutInterval
Time interval, in seconds, between NOP-Out requests sent from your iSCSI
initiator to an iSCSI target. The NOP-Out requests serve as the ping
mechanism to verify that a connection between the iSCSI initiator and the
iSCSI target is active.
Supported only at the initiator level.
NoopOutTimeout
Amount of time, in seconds, that can lapse before your host receives a NOP-In
message. The message is sent by the iSCSI target in response to the NOP-Out
request. When the NoopTimeout limit is exceeded, the initiator terminates the
current session and starts a new one.
Supported only at the initiator level.
RecoveryTimeout
Amount of time, in seconds, that can lapse while a session recovery is
performed. If the timeout exceeds its limit, the iSCSI initiator terminates the
session.
DelayedAck
Allows systems to delay acknowledgment of received data packets.
You can use the following ESXCLI commands to list parameter options.
n
Run esxcli iscsi adapter param get to list parameter options for the iSCSI adapter.
n
Run esxcli iscsi adapter discovery sendtarget param get or esxcli iscsi adapter target portal
param set to retrieve information about iSCSI parameters and whether they are seable.
Chapter 5 Managing iSCSI Storage
VMware, Inc. 91