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20-35
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
Chapter 20 Troubleshooting IP Storage Services
iSCSI Issues
To resolve the problem, tune the TCP parameters in the FCIP profile to match the characteristic and
constraints of the physical link and any other traffic shared on that link.
See “Verifying the Configuration of the Profiles Using the CLI” section on page 20-15 for details on the
adjustable parameters in the FCIP profile.
Troubleshooting FCIP and Compression
If you have an FCIP tunnel between an IPS module and a Cisco MDS 14/2, 9221i or MDS 18/4 module,
use the same compression mode on both sides of the FCIP tunnel. In this specific configuration, avoid
compression mode 1, because the Cisco MDS module could send compressed traffic faster than the IPS
module could process.
iSCSI Issues
This section contains information on troubleshooting iSCSI and includes the following topics:
• Troubleshooting iSCSI Authentication, page 20-35
• Displaying iSCSI Authentication Using Fabric Manager, page 20-36
• Displaying iSCSI Authentication Using the CLI, page 20-36
• Troubleshooting User Name and Password Configuration, page 20-37
• RADIUS Configuration Troubleshooting, page 20-38
• Troubleshooting RADIUS Routing Configuration, page 20-40
• Troubleshooting Dynamic iSCSI Configuration, page 20-41
Troubleshooting iSCSI Authentication
iSCSI user login authentication is required with the Cisco MDS 9000 Family switch. There are two ways
to authenticate iSCSI users: either locally in the switch’s configuration file or using the RADIUS server
database.
Figure 20-10 shows a successful iSCSI login for the Windows 2000 driver.
Figure 20-10 Successful iSCSI Login Status Window
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