illumos: manual page: iscsiadm.8

ISCSIADM(8) Maintenance Procedures ISCSIADM(8)

NAME

iscsiadm - enable management of iSCSI initiators

SYNOPSIS

iscsiadm subcommand direct-object [options] [operand]

DESCRIPTION

The iscsiadm command enables management of the iSCSI (Internet SCSI)
initiator on a host. iscsiadm is implemented as a set of subcommands,
many with their own options, which are described in the section for that
subcommand. Options not associated with a particular subcommand are
described under OPTIONS.

iscsiadm works only when the following service is online:

svc:/network/iscsi/initiator:default

The iscsiadm command supports the following subcommands, which are
described in detail in subsections that follow:

add
Adds element(s) to an object.

list
Lists element(s) of an object.

modify
Modifies attributes of an object.

remove
Removes an element from an object.

The iscsiadm subcommands operate on a direct-object. These are described
in the section for each subcommand.

The iscsiadm command supports the Internet Storage Name Service (iSNS)
for the discovery of iSCSI targets. The command supports the Challenge
Handshake Authentication Protocol (CHAP) for authentication.

add Subcommand
The syntax for the add subcommand is:

# iscsiadm add direct_object [operands...]

The add subcommand adds the following direct_objects:

discovery-address discovery-address [...]

Adds a target to a list of discovery addresses. A discovery address
(as in the syntax shown below) is an IP address:port combination used
in a SendTargets discovery session. Using this discovery approach, a
target device can inform an initiator of the target address and
target name of each target exposed by that device. Connection to a
target is not attempted unless the SendTargets method of discovery
has been enabled on the host. You enable this method with the modify
subcommand.

The discovery-address parameter is formatted as:

<IP address>[:port]

If port is not specified, the default of 3260 will be used.

isns-server isns-server [...]

Add an iSNS server to the list of iSNS server addresses. An iSNS
server address (specified in the syntax shown below) is an IP
address-port combination used in an iSNS discovery session. By using
iSNS discovery, an iSNS server can provide an initiator with
information about a portal and the name of each target that belongs
to the same discovery domain as that of the initiator. Connection to
the iSNS server is not attempted unless the iSNS method of discovery
has been enabled on the host. You enable this method with the modify
subcommand, described below.

The isns-server parameter is formatted as:

IP_address[:port]

If a port is not specified, the default of 3205 is used.

static-config static_target [...]

Adds a target to the list of statically configured targets. A
connection to the target will not be attempted unless the static
configuration method of discovery has been enabled.

The static_target parameter is formatted as:

<target-name>,<target address>[:port-number][,tpgt]

<target-name> can be up to 223 characters.

list Subcommand
The syntax for the list subcommand is:

# iscsiadm list direct-object [options]

The list subcommand displays data for the following direct-objects:

discovery

Lists the discovery methods and their current activation state,
enabled or disabled. Discovery methods are:

o iSNS (Internet Storage Name Service)

o Static

o SendTargets

initiator-node

Lists information for the initiator node on the host. The iSCSI
initiator node represents a logical HBA and is a logical host
connection point for iSCSI targets. The parameter values listed in
the response are default parameter settings for the initiator. Each
connected target for an initiator can have parameter values that
differ from the parameter values on the initiator node.

static-config [static_target[, ...]]

Lists the target name and address for specified targets or, if no
static targets are specified, all statically discovered targets.

target [-S] [-v] [target[, ...]]

Lists a target's current parameters, connection state, and which
method was used for the target's discovery. Reports information for
specified targets or, if no targets are specified, all targets that
have been discovered or have had parameters modified by the modify
target subcommand.

When used with the -S option for a specified target, this subcommand
returns:

o target name

o logical unit number

o vendor ID

o product ID

o OS device name (for example, /dev/rdsk/c0t2d0s0)
The -v options gives more details, such as the current login
parameters, the detailed connection information, and the discovery
method used to discover the target.

A return of NA as the discovery method parameter indicates that the
target was created with a iscsiadm modify target-param command and
does not exist as a discovered object. To remove such targets, use
iscsiadm remove target-param.

target-param [-v] target [...]

Lists a target's default and user-defined parameters.

discovery-address [-v] [discovery-address[, ...]]

Lists the discovery-address objects that have been added using the
iscsiadm add discovery-address subcommand.

When used with the -v option, lists all known targets at a specified
discovery-address. The -v option returns one or more target names
along with zero or more target addresses and associated target portal
group tags (TPGT), if applicable.

isns-server [-v] [isns-server[, ...]]

Lists the isns-server objects that have been added using the iscsiadm
add isns-server subcommand.

When used with the -v option, this subcommand lists all known targets
at a specified isns-server address. The -v option returns one of more
target names along with zero or more target addresses and associated
target portal group tags, if applicable.

modify Subcommand
The syntax for the modify subcommand is:

# iscsiadm modify direct_object [options]

The modify subcommand supports the following direct_objects:

discovery [options]

Enabling a discovery method initiates a discovery using that method.
Disabling a discovery method that is currently enabled does not
affect connections to any targets that have already been discovered
by that method.

Options for modify discovery are as follows:

-i, -iSNS enable | disable

Enable or disable iSNS discovery.

-s, --static enable | disable

Enable or disable static discovery.

-t, --sendtargets enable | disable

Enable or disable SendTargets discovery.

initiator-node [options]

Modifies an initiator's properties. If a target is currently
connected, this operation can succeed. However, the modified set of
parameters will not be in effect for that target until an existing
connection session no longer exists and a new connection has been
established. The options -C and --CHAP-secret require a CHAP secret
entry in response to a prompt.

For iSCSI booting when the Solaris I/O multipathing feature (formerly
known as Sun StorEdge Traffic Manager [STMS] or MPxIO) is disabled,
you can modify only the following initiator-node options:

o -r, --radius-server

o -R, --radius-access

o -P, --radius-shared-secret
For iSCSI booting when the Solaris I/O multipathing feature is
enabled, you can modify only the following initiator-node options:

o -h, --headerdigest

o -d, --datadigest

o -c, --configured-sessions
Options for modify initiator-node are as follows:

-A, --node-alias <initiator node alias>

Modifies the initiator node alias. Maximum length of 223
characters.

-a, --authentication chap | none

Sets the authentication mode.

-C, --CHAP-secret

Sets the CHAP secret value. There is no default value. Maximum
length is 16 characters; minimum required length is 12
characters.

-c, --configured-sessions <num_sessions> | <IP address>[,<IP
address>...]

Sets the number of configured iSCSI sessions that will be created
for each iSCSI target. The feature should be used in combination
with the Solaris I/O multipathing feature described in
scsi_vhci(4D).

-d, --datadigest none | CRC32

Sets whether CRC32 is enabled to check SCSI data transfers.

-H, --CHAP-name CHAP name

Specifies a CHAP username. If you do not use this option, upon
initialization, the CHAP name is set to the initiator node name.
When the authentication method is set to CHAP (see
-a/--authentication option, above), the CHAP username is
displayed with the command iscsiadm list initiator-node.

-h, --headerdigest none | CRC32

Sets whether CRC32 is enabled to check SCSI packet headers.

-N, --node-name <initiator node name>

Modifies the initiator node name. Maximum of 223 characters.

Note -

During Solaris installation, the initiator node name is set to
a globally unique value. Changing this value can adversely
affect operation within the iSCSI network.

-P, --radius-shared-secret (exclusive)

Sets the RADIUS shared secret.

-R, --radius-access enable | disable

Sets whether a RADIUS server will be used.

-r, --radius-server <IP address>[:<port>]

Sets the IP address and port of the radius server to be used.

-T, --tunable-param <<tunable-prop>=<value>, ...>

Specify one or more tunable parameters for all targets that
initiator node connected.

Note -

These values should only be modified by an administrator with a
good working knowledge of the parameter's impact within the
iSCSI network.
Supported tunable-prop options are:

recv-login-rsp-timeout

Session Login Response Time

The recv-login-rsp-timeout option specifies how long iSCSI
initiator will wait for the response of iSCSI session login
request from the iSCSI target. Valid value is from 0 to
60*60, default to 60 seconds.

conn-login-max

Maximized Connection Retry Time

The conn-login-max option lets the iSCSI initiator
reestablish the connection to the target in case of IO
timeout or connection failure during the given time window.
Valid value is from 0 to 60*60, default to 180 seconds.

polling-login-delay

Login Retry Time Interval

The polling-login-delay option specifies the time interval
between each login retry when iSCSI initiator to target IO
timeout or connection failure. Valid value is from 0 to
60*60, default to 60 seconds.

target-param [options] target

Modifies a target's parameters. If a target is currently connected,
the modify operation will succeed, although the modified settings
might not take effect for a few seconds. To confirm that these
settings are active, use iscsiadm list target -v. If a specified
target is not associated with any discovery method, a target object
is created with the specified parameters. After using this command
to modify a target's parameters, the new parameters will persist
until they are modified or removed with a iscsiadm remove target-
param command on that target. The options -C and --CHAP-secret
require a CHAP secret entry in response to a prompt.

Options for modify target-param are as follows:

-B, --bi-directional-authentication enable | disable

Sets the bidirectional option. If set to enable, the initiator
performs bidirectional authentication for the specified target.

-C, --CHAP-secret

Sets the target's CHAP secret value. There is no default value.
Maximum acceptable length is 16 characters.

-c, --configured-sessions <num_sessions> | <IP address>[,<IP
address>...]

Sets the number of configured iSCSI sessions that will be created
for each iSCSI target. The feature should be used in combination
with the Solaris I/O multipathing feature described in
scsi_vhci(4D).

-d, --datadigest none | CRC32

Sets whether CRC32 is enabled or disabled for the data.

-H, --CHAP-name CHAP name

Sets a CHAP username. If you do not use this option, upon
initialization, the CHAP name is set to the target name. When the
authentication method is set to CHAP (see -a/--authentication
option, under the initiator-node direct object, above), the CHAP
username is displayed with the command iscsiadm list initiator-
node.

-h, --headerdigest none | CRC32

Sets whether CRC32 is enabled or disabled for the header.

-p, --login-param

Specify one or more login parameter settings.

Note -

These values should only be modified by an administrator with a
good working knowledge of the parameter's impact within the
iSCSI network.
The login parameters are derived from iSCSI proposed standard RFC
3720. Valid values are:

dataseqinorder
yes or no

defaulttime2retain
0-3600

defaulttime2wait
0-3600

firstburstlength
512 to 2^24-1

immediatedata
yes or no

initialr2t
yes or no

maxburstlength
512 to 2^24-1

datapduinorder
yes or no

maxoutstandingr2t
1 to 65535

maxrecvdataseglen
512 to 2^24-1

-T, --tunable-param <<tunable-prop>=<value>, ...>

Specify one or more tunable parameters for all targets that
initiator node connected.

Note -

Tunable values should only be modified by an administrator with
a good working knowledge of the parameter's impact within the
iSCSI network.
Supported tunable-prop options are:

recv-login-rsp-timeout

Session Login Response Time

The recv-login-rsp-timeout option specifies how long iSCSI
initiator will wait for the response of iSCSI session login
request from the iSCSI target. Valid value is from 0 to
60*60, default to 60 seconds.

conn-login-max

Maximized Connection Retry Time

The conn-login-max option lets the iSCSI initiator
reestablish the connection to the target in case of IO
timeout or connection failure during the given time window.
Valid value is from 0 to 60*60, default to 180 seconds.

polling-login-delay

Login Retry Time Interval

The polling-login-delay option specifies the time interval
between each login retry when iSCSI initiator to target IO
timeout or connection failure. Valid value is from 0 to
60*60, default to 60 seconds.

remove Subcommand
The syntax for the remove subcommand is:

# iscsiadm remove direct_object

The remove subcommand supports the following direct_objects:

discovery-address discovery-address, ...

Removes a target device from the list of discovery addresses. A
discovery address (as in the syntax shown below) is an IP address-
port combination used in a SendTargets discovery session. Using this
discovery approach, a target device can inform an initiator of the
target address and target name of each target exposed by that device.
If any target exposed by the discovery address is currently mounted
or there is active I/O on the device, an error of "logical unit in
use" is returned and the operation fails. If the associated devices
are not in use, they are removed.

discovery-address must be formatted as:

<IP address>[:<port>]

There are no options associated with this direct object.

isns-server isns-server, ...

Removes an iSNS server from the list of iSNS server addresses. An
iSNS server address (specified in the syntax shown below) is an IP
address-port combination used in an iSNS discovery session. By using
iSNS discovery, an iSNS server can provide an initiator with
information about a portal and the name of each target that belongs
to the same discovery domain as that of the initiator. If any target
discovered by means of iSNS is currently mounted or there is active
I/O on the device, an error of "logical unit in use" is returned and
the operation fails. If the associated devices are not in use, they
are removed.

isns-server must be formatted as:

IP_address[:port]

There are no options associated with this direct object.

static-config static_target, ...

Removes a target from the list of statically discovered targets. If
the target being removed is currently mounted or there is active I/O
on the device, an error of "logical unit in use" is returned and the
operation fails. If a device is not in use, it will be removed.

static_target must be formatted as:

<target-name>,<target-address>[:port-number][,tpgt]

There are no options associated with this direct object.

target-param target-name

Removes target specified by target-name. The target name is formatted
as:

<target-name>

There are no options associated with this direct object. For iSCSI
booting when the Solaris I/O multipathing feature (formerly known as
Sun StorEdge Traffic Manager [STMS] or MPxIO) is enabled, you cannot
remove the target.

Proper Use of Discovery Methods

Do not configure a target to be discovered by both static and dynamic
discovery methods. The consequence of using redundant discovery methods
might be slow performance when communicating with the iSCSI target
device.

OPTIONS

The following generic options are supported:

-V, --version
Displays version information. Stops interpretation of
subsequent arguments.

-?, --help
Displays help information. Can be used following an
iscsiadm command with no arguments, following a
subcommand, or following a subcommand-direct object
combination. Responds with help information appropriate
for your entry. For example, if you enter:

# iscsiadm modify initiator-node --help

...iscsiadm responds with a display of the options
available for that combination of subcommand and direct
object.

EXAMPLES

Example 1: Adding a Discovery Address

The following command uses the add subcommand to add a discovery address.

# iscsiadm add discovery-address 10.0.0.1:3260 10.0.0.2:3260

Example 2: Adding a Static Target

The following command uses the add subcommand to add a static target.

# iscsiadm add static-config \
iqn.1999-08.com.array:sn.01234567,10.0.0.1:3260

Example 3: Listing Current Discovery Settings

The following command uses the list subcommand to list current discovery
settings.

# iscsiadm list discovery
Discovery:
Static: enabled
Send Targets: disabled
iSNS: enabled

Example 4: Obtaining Verbose Discovery Output

The following commands uses the -v option (one with, one without) with
the list subcommand to obtain verbose output.

# iscsiadm list discovery-address
Discovery Address: 10.0.0.1:3260
Discovery Address: 10.0.0.2:3260

# iscsiadm list discovery-address -v 10.0.0.1:3260
Discovery Address: 10.0.0.1:3260
Target name: eui.210000203787d1f7
Target address: 10.0.0.1:3260
Target name: eui.210000203787a693
Target address: 10.0.0.1:3260

Example 5: Displaying Information on the Initiator

The following command uses the list subcommand to display information on
the initiator.

# iscsiadm list initiator-node
Initiator node name: iqn.1986-03.com.company.central.interopv20-1
Initiator node alias: interopv20-1
Login Parameters (Default/Configured):
Header Digest: NONE/NONE
Data Digest: NONE/NONE
Authentication Type: CHAP
CHAP Name: iqn.1986-03.com.company.central.interopv20-1
RADIUS Server: NONE
RADIUS access: disabled
Tunable Parameters (Default/Configured):
Session Login Response Time: 60/-
Maximum Connection Retry Time: 180/-
Login Retry Time Interval: 60/-
Configured Sessions: 1

Example 6: Displaying Static Configuration Information

The following command uses the list subcommand to display information
about static configurations.

# iscsiadm list static-config
Static target: eui.210000203787a693,10.0.0.1:3260

Example 7: Displaying Target Information

The following commands show the use of the list subcommand with various
options to display information about targets.

# iscsiadm list target
Target: iqn.2004-05.com.abcStorage:Tgt-1
Alias: -
TPGT: 12288
ISID: 4000002a0000
Connections: 1# iscsiadm list target -v iqn.2004-05.com.abcStorage:Tgt-1
Target: iqn.2004-05.com.abcStorage:Tgt-1
Alias: -
TPGT: 12288
ISID: 4000002a0000
Connections: 1
CID: 0
IP address (Local): 10.4.52.158:32803
IP address (Peer): 10.4.49.70:3260
Discovery Method: SendTargets
Login Parameters (Negotiated):
Data Sequence In Order: yes
Data PDU In Order: yes
Default Time To Retain: 20
Default Time To Wait: 2
Error Recovery Level: 0
First Burst Length: 65536
Immediate Data: yes
Initial Ready To Transfer (R2T): yes
Max Burst Length: 262144
Max Outstanding R2T: 1
Max Receive Data Segment Length: 65536
Max Connections: 1
Header Digest: NONE
Data Digest: NONE
# iscsiadm list target -S iqn.2004-05.com.abcStorage:Tgt-1
Target: iqn.2004-05.com.abcStorage:Tgt-1
Alias: -
TPGT: 12288
ISID: 4000002a0000
Connections: 1
LUN: 6
Vendor: ABCStorage
Product: iSCSI Target
OS Device Name: /dev/rdsk/c3t1d0s2
LUN: 5
Vendor: ABCStorage
Product: iSCSI Target
OS Device Name: /dev/rdsk/c3t0d0s2

Example 8: Displaying Target Parameter Information

The following command uses the list subcommand to display target
information for a specific target.

# iscsiadm list target-param -v iqn.2004-05.com.abcStorage:Tgt-1
Target: iqn.2004-05.com.abcStorage:Tgt-1
Alias: -
Bi-directional Authentication: disabled
Authentication Type: NONE
Login Parameters (Default/Configured):
Data Sequence In Order: yes/-
Data PDU In Order: yes/-
Default Time To Retain: 20/-
Default Time To Wait: 2/-
Error Recovery Level: 0/-
First Burst Length: 65536/-
Immediate Data: yes/-
Initial Ready To Transfer (R2T): yes/-
Max Burst Length: 262144/-
Max Outstanding R2T: 1/-
Max Receive Data Segment Length: 65536/-
Max Connections: 1/-
Header Digest: NONE/-
Data Digest: NONE/-
Tunable Parameters (Default/Configured):
Session Login Response Time: 60/-
Maximum Connection Retry Time: 180/-
Login Retry Time Interval: 60/-
Configured Sessions: 1

Example 9: Enabling Static Discovery Method

The following command uses the modify subcommand to enable the static
discovery method.

# iscsiadm modify discovery --static enable

Example 10: Setting the IP Address for the Radius Server

The following command uses the modify subcommand to set the IP address
for the radius server, which will be used for CHAP authentication.

# iscsiadm modify initiator --radius-server 10.0.0.1

Example 11: Setting the Node Name for Initiator

The following command uses the modify subcommand to set the node name for
the initiator node.

# iscsiadm modify initiator-node -N iqn.2004-10.com.SUN.host-1

Example 12: Changing Target Parameters

The following command uses the modify subcommand to change the target
parameters for a specified target.

# iscsiadm modify target-param -d none -h none eui.210000203787a693

Example 13: Removing a Discovery Address

The following command uses the remove subcommand to remove a discovery
address.

# iscsiadm remove discovery-address 10.0.0.1:3260

Example 14: Removing Target Parameters

The following command uses the remove subcommand to remove a set of
target parameters.

# iscsiadm remove target-param eui.210000203787a693

ATTRIBUTES