- Preface
- New and Changed Information
- Overview
- Configuring Fibre Channel Interfaces
- Configuring Fibre Channel Domain Parameters
- Configuring N Port Virtualization
- Configuring VSAN Trunking
- Configuring SAN Port Channels
- Configuring and Managing VSANs
- Configuring and Managing Zones
- Distributing Device Alias Services
- Configuring Fibre Channel Routing Services and Protocols
- Managing FLOGI, Name Server, FDMI, and RSCN Databases
- Discovering SCSI Targets
- Advanced Fibre Channel Features
- Configuring FC-SP and DHCHAP
- Configuring Port Security
- Configuring Fabric Binding
- Configuring Fabric Configuration Servers
- Configuring Port Tracking
- Index
Contents
- Discovering SCSI Targets
- Discovering SCSI Targets
- Information About SCSI LUN Discovery
- About Starting SCSI LUN Discovery
- Starting SCSI LUN Discovery
- About Initiating Customized Discovery
- Initiating Customized Discovery
- Displaying SCSI LUN Information
Discovering SCSI Targets
This chapter contains the following sections:
Discovering SCSI Targets
Information About SCSI LUN Discovery
Small Computer System Interface (SCSI) targets include disks, tapes, and other storage devices. These targets do not register logical unit numbers (LUNs) with the name server.
The name server requires LUN information for the following reasons:
-
To display LUN storage device information so that a Network Management System (NMS) can access this information.
-
To report device capacity, serial number, and device ID information.
-
To register the initiator and target features with the name server.
The SCSI LUN discovery feature uses the local domain controller Fibre Channel address. It uses the local domain controller as the source FC ID, and performs SCSI INQUIRY, REPORT LUNS, and READ CAPACITY commands on SCSI devices.
The SCSI LUN discovery feature is initiated on demand, through CLI or SNMP. This information is also synchronized with neighboring switches, if those switches are Cisco Nexus devices.
- About Starting SCSI LUN Discovery
- Starting SCSI LUN Discovery
- About Initiating Customized Discovery
- Initiating Customized Discovery
About Starting SCSI LUN Discovery
SCSI LUN discovery is done on demand.
Only Nx ports that are present in the name server database and that are registered as FC4 Type = SCSI_FCP are discovered.
Starting SCSI LUN Discovery
To start SCSI LUN discovery, perform this task:
1.
switch# discover scsi-target {custom-list | local | remote |
vsan
vsan-id
fcid
fc-id} os
{aix | hpux | linux | solaris | windows}
[lun | target]
DETAILED STEPS
Command or Action | Purpose |
---|
Examples of Starting SCSI LUN Discovery
The following example discovers local SCSI targets for all operating systems (OSs):
switch# discover scsi-target local os all
discovery started
The following example discovers remote SCSI targets assigned to the AIX OS:
switch# discover scsi-target remote os aix
discovery started
The following example discovers SCSI targets for VSAN 1 and FC ID 0x9c03d6:
switch# discover scsi-target vsan 1 fcid 0x9c03d6
discover scsi-target vsan 1 fcid 0x9c03d6
VSAN: 1 FCID: 0x9c03d6 PWWN: 00:00:00:00:00:00:00:00
PRLI RSP: 0x01 SPARM: 0x0012
SCSI TYPE: 0 NLUNS: 1
Vendor: Company 4 Model: ST318203FC Rev: 0004
Other: 00:00:02:32:8b:00:50:0a
The following example discovers SCSI targets from the customized list assigned to the Linux OS:
switch# discover scsi-target custom-list os linux
discovery started
About Initiating Customized Discovery
Customized discovery consists of a list of VSAN and domain pairs that are selectively configured to initiate a discovery. Use the custom-list option to initiate this discovery. The domain ID is a number from 0 to 255 in decimal or a number from 0x0 to 0xFF in hex.
Initiating Customized Discovery
To initiate a customized discovery, perform this task:
1.
switch# discover custom-list add vsan
vsan-id
domain
domain-id
2.
switch# discover custom-list delete vsan
vsan-id
domain
domain-id
DETAILED STEPS
Command or Action | Purpose |
---|
Displaying SCSI LUN Information
Use the show scsi-targetand show fcns databasecommands to display the results of the discovery.
The following example displays the discovered targets:
switch# show scsi-target status
discovery completed
![]() Note | This command takes several minutes to complete, especially if the fabric is large or if several devices are slow to respond. |
The following example displays the FCNS database:
switch# show fcns database
The following example displays the SCSI target disks:
switch# show scsi-target disk
The following example displays the discovered LUNs on all operating systems:
switch# show scsi-target lun os all
The following example displays the port WWN that is assigned to each operating system (Windows, AIX, Solaris, Linux, or HPUX):
switch# show scsi-target pwwn