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Release Notes for Cisco SN 5420 Storage Router Release 1.1.5

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Release Notes for Cisco SN 5420 Storage Router Release 1.1.5

Table Of Contents

Release Notes for Cisco SN 5420 Storage Router Release 1.1.5

Contents

Introduction

System Requirements

Obtaining iSCSI Drivers

External Devices

External Hosts

Graphical User Interface

Determining the SN 5420 Software Version

Upgrading to a New Software Release

Uninstalling an Upgrade

New and Changed Information

Limitations and Restrictions on SN 5420 Storage Router Clusters

Caveats

Open Caveats

Resolved Caveats

Documentation Updates

Related Documentation

Release-Specific Documents

Platform-Specific Documents

Hardware Documents

Software Documents

Service and Support

Obtaining Documentation

World Wide Web

Documentation CD-ROM

Ordering Documentation

Documentation Feedback

Obtaining Technical Assistance

Cisco.com

Technical Assistance Center

Contacting TAC by Using the Cisco TAC Website

Contacting TAC by Telephone


Release Notes for Cisco SN 5420 Storage Router Release 1.1.5


August 6, 2001


Note You can find the most current documentation on Cisco.com. This set of electronic documents may contain updates and modifications made after the hard-copy documents were printed.


These release notes support Cisco SN 5420 Storage Router for Release 1.1.5.

For a list of software caveats that apply to Release 1.1.5, see the "Caveats" section. The caveats are updated for every maintenance release and are located on Cisco.com and the Documentation CD-ROM.

Contents

These Release Notes describe the following topics:

Introduction

System Requirements

New and Changed Information

Limitations and Restrictions on SN 5420 Storage Router Clusters

Caveats

Documentation Updates

Related Documentation

Service and Support

Obtaining Documentation

Obtaining Technical Assistance

Introduction

The SN 5420 Storage Router provides servers with IP access to storage through SCSI routing using iSCSI protocol. The iSCSI protocol is a protocol for encapsulating SCSI requests and responses over IP. With SCSI routing, servers use an IP network to access storage as if the servers were directly attached to the storage devices. (See Figure 1.)

Figure 1 SN 5420 Storage Router Overview


Note The iSCSI protocol is an IETF-defined protocol for IP storage (ips). For more information about the iSCSI protocol, refer to the IETF standards for IP storage at http://www.ietf.org.


System Requirements

This section describes the system requirements for Release 1.1.5 and includes the following information:

Obtaining iSCSI Drivers

External Devices

External Hosts

Graphical User Interface

Determining the SN 5420 Software Version

Upgrading to a New Software Release

Uninstalling an Upgrade

Obtaining iSCSI Drivers

To access the SN 5420 Storage Router, servers must have a Cisco Storage Networking iSCSI driver installed and configured. The Cisco Storage Networking iSCSI drivers, accompanying readme files, release notes and example configuration files are available for download to the general public and registered users of Cisco.com. Access the appropriate URL as follows:

Access Type
URL

General public

http://www.cisco.com/pcgi-bin/tablebuild.pl/sn5420

Registered Cisco.com users

http://www.cisco.com/cgi-bin/tablebuild.pl/sn5420

(You will be prompted to enter your user name and password.)


In addition, you can check these websites for information about the availability of new drivers, updated drivers, driver compatibility, and other relevant information.


Note URLs are subject to change without notice. If the URL changes, go to http://www.cisco.com and click Software Center at Service & Support. At Software Center, click Storage Networking Software. Then, at Storage Networking Software, click Cisco SN 5420 Storage Router Software. If you are a registered Cisco.com user, be sure to log in first.


External Devices

The SN 5420 Storage Router Gigabit Ethernet interface uses a flow control mechanism for stopping and starting traffic that prevents the loss of data. Flow control should also be turned on at the Gigabit Ethernet port that the SN 5420 Storage Router is plugged in to.

External Hosts

To ensure the best performance for the iSCSI drivers, the extended windowing feature of TCP and the receive and transmit flow control feature of the Gigabit Ethernet driver should be enabled on all servers connecting to the SN 5420. You can use the CLI show scsirouter connection tcp command to display the current and maximum TCP window size for each connected host.

If you are using a 3Com Gigabit Ethernet Server network interface card, the minimum supported revision level is "B" (3C985B-SX). Using a card with a lower revision level will decrease performance.

Graphical User Interface

To ensure the display of the most current SN 5420 information, disable your browser cache. If caching is enabled, use your browser Refresh or Reload function to force the current page to be reloaded from the storage router.

To access the online Help system for the SN 5420 web-based GUI, use a browser that is compatible with HTML 3.2, such as Internet Explorer 3.0 or later, or Netscape Navigator 3.0 or later. Any browser that does not provide full support for Dynamic HTML (such as Netscape Navigator) must be enabled to support Java, JavaScript and style sheets.

These browser restrictions apply only to the online Help system. There are no browser limitations or requirements associated with the SN 5420 web-based GUI.

Determining the SN 5420 Software Version

To determine the version of SN 5420 software running on your Cisco SN 5420 Storage Router, establish a Telnet or console port session with the storage router, and change to Administrator mode. Then enter the CLI show software command. (See Example 1.)

Example 1 Determining the Software Version

[SN5420-A01]# show software
Version               Boot  Hash  Sign  Crash      Size  Date                 
1.1.4                 OK    OK    N/A       0   6.95 MB  Jun 18 13:33 CST 2001
1.1.5                 OK    OK    N/A       0   7.01 MB  Aug  2 12:07 CST 2001
  Disk Space Free: 10.5 Mbytes
     Download URL: http://10.1.11.32/~software/sn5420
    Download User: SWAdmin01
  Running Version: 1.1.5
Will boot Version: 1.1.5

The last entries in the table of information displayed in response to the command show the running version (Running Version) and the version that the storage router will run at the next reboot (Will boot Version).

You can also check the version of the SN 5420 software by using the SN 5420 web-based GUI. At the web-based GUI Monitor page, click Processor and SW under the System menu. Clicking Processor and SW causes the Processor and Software Information table to be displayed. The Software Version field contains the current software version information.

Upgrading to a New Software Release

For information about upgrading to new SN 5420 software using the CLI, see the section "Installing Updated Software" in Chapter 6, "Maintaining and Managing the SN 5420" of the Cisco SN 5420 Storage Router Software Configuration Guide.

To upgrade to new SN 5420 software using the SN 5420 web-based GUI, follow these instructions:


Step 1 Log in as Admin.

Step 2 Click Download Software in the Maintenance menu and follow the instructions.

Step 3 After you have downloaded the new version of software, click System Reset in the Maintenance menu.

Step 4 At Select next boot version, select the new software version.

Step 5 Click Reset System.

Step 6 After the storage router has rebooted, verify that it is running the new software. (See the "Determining the SN 5420 Software Version" section)


For information about upgrading to new iSCSI driver software, see the readme file for the appropriate iSCSI driver.

Uninstalling an Upgrade

To return to a previous SN 5420 software release and remove the updated SN 5420 software using the CLI, follow these instructions:

 
Command
Description

Step 1 

enable

Enter Administrator mode.

Step 2 

show software

Verify that the previous version of SN 5420 software is still available. If it is not, see the section "Installing Updated Software" in Chapter 6, "Maintaining and Managing the SN 5420" of the Cisco SN 5420 Storage Router Software Configuration Guide.

Step 3 

set software version 1.1.4

Select the software to be booted when the system next starts; for example, boot version 1.1.4 when the system restarts. This may take several minutes.

Step 4 

reboot

Reboot the SN 5420 Storage Router.

Step 5 

enable

Enter Administrator mode after the storage router reboots.

Step 6 

show software

Verify that the storage router is now running the correct software.

Step 7 

delete software version 1.1.5

(Optional) Remove the updated SN 5420 software from the storage router.

To return to a previous SN 5420 software release and remove the updated SN 5420 software using the SN 5420 web-based GUI, follow these instructions:


Step 1 Log in as Admin.

Step 2 Click System Reset in the Maintenance menu.

Step 3 At Select next boot version, select the software version to be run on the SN 5420.

Step 4 Click Reset System.

Step 5 After the storage router has rebooted, verify that it is running the selected software. (See the "Determining the SN 5420 Software Version" section.)

Step 6 (Optional) Click the Maintenance menu, then click the Delete? link to the right of the new software version to remove it from the storage router.


For information about uninstalling updated iSCSI driver software, see the readme file for the appropriate iSCSI driver.

New and Changed Information

There are no new features in Release 1.1.5.

Limitations and Restrictions on SN 5420 Storage Router Clusters

For this release, there are no new limitations or restrictions on SN 5420 Storage Router clusters. The limitations and restrictions associated with SN 5420 release 1.1.3 still apply, as follows:

A storage router cluster can contain up to two SN 5420 Storage Routers.

A cluster can contain up to four instances of SCSI routing services.

Each instance of SCSI routing services in a cluster can support up to 32 servers. (Each server connects to an instance of SCSI routing services with only one TCP/IP session. Each instance of SCSI routing services can support up to 32 TCP/IP sessions.)

Caveats

Caveats describe unexpected behavior or defects in SN 5420 software releases. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious.

This document describes open and resolved severity 1 and 2 caveats and selected caveats of other severities:

The "Open Caveats" section lists open caveats that apply to the current release and may apply to previous releases.

The "Resolved Caveats" section list caveats resolved in a particular release, but open in previous releases.

Within the sections the caveats are sorted alphanumerically by caveat number.


Note If you have an account with Cisco.com, you can use Bug Navigator II to find caveats of any severity for any release. You can reach Bug Navigator II on Cisco.com at Service & Support:
http://www.cisco.com/pcgi-bin/Support/Bugtool/launch_bugtool.pl.


Open Caveats

There are no severity 1 or 2 caveats open against SN 5420 Release 1.1.5. For a more complete list of caveats against this release, access Cisco.com as described in the section "Cisco.com" at the end of this document.

Resolved Caveats

All the caveats listed in this section are resolved in SN 5420 Release 1.1.5. This section describes severity 1 and 2 caveats and selected caveats of other severity levels.

CSCdu37527

When the storage router has a SCSI routing services instance configured with targets and LUNs, the LUNs cannot be deleted if the iSCSI driver has logged in.

Workaround: There is no workaround. The iSCSI driver must log out before a LUN can be deleted.


Note CLI command functionality was changed and a new CLI command keyword was added as part of the resolution of this caveat. See the delete scsirouter target force command described in the "Documentation Updates" section.


CSCdu47113

Under certain circumstances, failed I/O to a target may interrupt I/O to other targets. The problem may occur when hosts running the Cisco SN iSCSI driver for Windows NT are accessing multiple targets and one or more targets are made unavailable.

Workaround: Restart the iSCSI driver.

CSCdu51605

After a Fibre Channel switch reboots, targets may not be accessible if the ports register to the fabric in a different order. This only occurs if loop ID mapping is used for fibre-attached devices.

Workaround: Reboot the SN 5420 Storage Router.


Note The output of the show devices CLI command has been enhanced and checks have been added to the add scsirouter target command to warn the user when the device interface topology is not consistent with the selected mapping method. See the show devices and set scsirouter target commands described in the "Documentation Updates" section.


CSCdu60125

The firmware may return overruns on reads when a cable is unplugged and then plugged back in while running reads, causing the Fibre Channel port to hang. These errors need to be retried by the storage router.

Workaround: There is no workaround.

CSCdu68070

Low-level POST NVRAM tests cause the boot code to hang early in the boot process. The following text displays on the RS-232 console:

<<< Cisco SN5420 Storage Roouter >>>
 
 WARNING!  One or more level one POST tests are disabled!
 
 s012

Workaround: There is no workaround.

Documentation Updates

This section describes changes to the Cisco SN 5420 Storage Router documentation set.

References to iSCSI driver CD

On pages vii, 1-1 and 1-10 of the Cisco SN 5420 Storage Router Software Configuration Guide, and page 1-1 of the Cisco SN 5420 Storage Router Hardware Installation Guide, there are references to a Cisco Storage Networking iSCSI Drivers CD. The iSCSI drivers, readme and example configuration files referenced there are currently available only through the Cisco.com website. The Cisco SN 5420 Storage Router does not currently ship with a Cisco Storage Networking iSCSI Drivers CD.

See the "Obtaining iSCSI Drivers" section for details on obtaining iSCSI drivers.

Fibre Channel Port Cabling Specifications

On page B-2 of the Cisco SN 5420 Storage Router Hardware Installation Guide, Table, B-2, "Fibre Channel Port Cabling Specifications," the values in the Maximum Cable Distance column should be changed as follows:

Row 1: Change 300 ft (91 m) to 984 ft (300 m).

Row 2: Change 500 ft (152 m) to 1640 ft (500 m).

CLI command add scsirouter target

On pages 7-11 and 7-15 of the Cisco SN 5420 Storage Router Software Configuration Guide, the following sentences should be added to the end of the first paragraph in the "Usage Guidelines" section. On page 7-21, the sentences should be inserted into the "Usage Guidelines" section between the forth and fifth paragraphs.

Mapping to a loop ID assumes a compatible device interface topology, such as loop. If an incompatible device interface topology, such as point-to-point (PTP), is detected, a warning message is displayed (although the requested mapping action is still processed by the storage router).

CLI command delete scsirouter target

The functionality of the delete scsirouter target command has been enhanced. Any attempt to delete a target or LUN that is currently logged into by an iSCSI driver will result in an informational message indicating that the object is in use and will not be deleted.

On page 7-32 of the Cisco SN 5420 Storage Router Software Configuration Guide, an optional force keyword should be added to the delete scsirouter target command. The force keyword allows the deletion of a target or LUN that is in use by an iSCSI driver, overriding the default protections.

Use the force keyword with caution. Deleting a target or LUN that is being actively used by an iSCSI driver can cause unexpected results.

The new command syntax is:

delete scsirouter name target {name | all} [lun nn] [force]

CLI command download software readme

The download software readme command has been removed. The Release Notes document for each software release is only available as an electronic document on Cisco.com and the Documentation CD-ROM.

All references to the download software readme command should be removed from the Cisco SN 5420 Storage Router Software Configuration Guide.

CLI command set software version

The functionality and output of the set software version command have been enhanced to include verification of software, confirmation of required disk space, and status at each step in the process.

CLI command show devices

On page 7-131 of the Cisco SN 5420 Storage Router Software Configuration Guide, the "Usage Guidelines" section should be updated to read as follows:

Use this command to display the WWNN, WWPN, LUN number, vendor, product name and serial number for all devices found on the SN 5420 Fibre Channel network. For loop-attached devices, loop ID information is also displayed. For fabric-attached devices, the 24-bit port ID is displayed. The output indicates the type of topology on which the devices are detected as private/public loop or fabric attached.

The following "Examples" section should be added.

The following is an example of output for the show devices command when the device interface topology is set to PTP:

[SN5420A]# show devices
Private/Public Loop Devices detected:
lunwwn:wwpn:loopid:lun:vendor:product:serial
NONE
Fabric Attached Devices detected:
lunwwn:          wwpn:             portId: lun: vendor:   product:    serial
3000102037f9bf2a  3100003078b9bf2a  0x411ea  0   SEAGATE   ST31951FD  4DZA4MZB012
4000402037e9c036  4100004056b9c036  0x4113c  0   SEAGATE   ST31951FD  3CXO4M4T015
5003002037d9c01e  5100002088b9c01e  0x511f0  0   SEAGATE   ST31951FD  3CPQ4MN0715
6000082037c9bf7c  6100001137b9bf7c  0x511f1  0   SEAGATE   ST31951FD  3CZZ46H7005

The following is an example of output for the show devices command when the device interface topology is set to loop:

[SN5420A]# show devices
Private/Public Loop Devices detected:
lunwwn:          wwpn:             loopid: lun: vendor:   product:   serial
3000102037b7847d  3100002037b7847d  1       0x0  SEAGATE   ST31951FD  3CC03007110
2008002047z78e44  2100002047z78e44  2       0x0  SEAGATE   ST31951FD  3C3A830010C
9000002038c59748  2100002038c59748  3       0x0  SEAGATE   ST31951FD  3CCPNT00711
2000002067c51e08  2100002067c51e08  4       0x0  SEAGATE   ST31951FD  3CV2X000711
Fabric Attached Devices detected:
lunwwn:wwpn:portId:lun:vendor:product:serial
NONE

CLI command verify software version

The output of the verify software version command has been enhanced to display additional information. On page 7-69 of the Cisco SN 5420 Storage Router Software Configuration Guide, the "Usage Guidelines" section should be updated to read as follows:

Use this command after downloading software to verify that the download completed successfully and that the download software is bootable. The output includes the name, size and status for each module in the SN 5420 Storage Router software.

Related Documentation

The following sections describe the related documentation available for Cisco SN 5420 Storage Router Release 1.1.5. These documents consist of hardware installation and software configuration guides, and platform-specific release notes, readme and example configuration files for the Cisco Storage Networking iSCSI drivers.

Release-Specific Documents

This Release Notes document is the only document specific to SN 5420 Release 1.1.5. It is only available as an electronic document on Cisco.com and the Documentation CD-ROM.

Platform-Specific Documents

Platform-specific documents consist of the release notes, readme and example configuration files for Cisco Storage Networking iSCSI drivers. The files are currently available in electronic format only. See the "Obtaining iSCSI Drivers" section for details.

Hardware Documents

Refer to the Cisco SN 5420 Storage Router Hardware Installation Guide for hardware installation procedures. This document is available as a printed manual. It is also available as an electronic document on Cisco.com and the Documentation CD-ROM.

Software Documents

Refer to the Cisco SN 5420 Storage Router Software Configuration Guide for configuration information and procedures. This document is available as a printed manual. It is also available as an electronic document on Cisco.com and the Documentation CD-ROM.

For documentation on the SN 5420 web-based GUI, refer to the SN 5420 Storage Router web-based GUI online Help system.

Service and Support

For service and support for a product purchased from a reseller, contact the reseller, who offers a wide variety of Cisco service and support programs described in "Service and Support" of Cisco Information Packet shipped with your product.


Note If you purchased your product from a reseller, you can access Cisco.com as a guest. Cisco.com is Cisco Systems' primary real-time support channel. Your reseller offers programs that include direct access to Cisco.com services.


For service and support for a product purchased directly from Cisco, use Cisco.com.

Obtaining Documentation

The following sections provide sources for obtaining documentation from Cisco Systems.

World Wide Web

You can access the most current Cisco documentation on the World Wide Web at the following sites:

http://www.cisco.com

http://www-china.cisco.com

http://www-europe.cisco.com

Documentation CD-ROM

Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM is updated monthly and may be more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.

Ordering Documentation

Cisco documentation is available in the following ways:

Registered Cisco Direct Customers can order Cisco Product documentation from the Networking Products MarketPlace:

http://www.cisco.com/cgi-bin/order/order_root.pl

Registered Cisco.com users can order the Documentation CD-ROM through the online Subscription Store:

http://www.cisco.com/go/subscription

Nonregistered Cisco.com users can order documentation through a local account representative by calling Cisco corporate headquarters (California, USA) at 408 526-7208 or, in North America, by calling 800 553-NETS(6387).

Documentation Feedback

If you are reading Cisco product documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco.

You can e-mail your comments to bug-doc@cisco.com.

To submit your comments by mail, use the response card behind the front cover of your document, or write to the following address:

Attn Document Resource Connection
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-9883

We appreciate your comments.

Obtaining Technical Assistance

Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain documentation, troubleshooting tips, and sample configurations from online tools. For Cisco.com registered users, additional troubleshooting tools are available from the TAC website.

Cisco.com

Cisco.com is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information and resources at anytime, from anywhere in the world. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco.

Cisco.com provides a broad range of features and services to help customers and partners streamline business processes and improve productivity. Through Cisco.com, you can find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online technical support, download and test software packages, and order Cisco learning materials and merchandise. Valuable online skill assessment, training, and certification programs are also available.

Customers and partners can self-register on Cisco.com to obtain additional personalized information and services. Registered users can order products, check on the status of an order, access technical support, and view benefits specific to their relationships with Cisco.

To access Cisco.com, go to the following website:

http://www.cisco.com

Technical Assistance Center

The Cisco TAC website is available to all customers who need technical assistance with a Cisco product or technology that is under warranty or covered by a maintenance contract.

Contacting TAC by Using the Cisco TAC Website

If you have a priority level 3 (P3) or priority level 4 (P4) problem, contact TAC by going to the TAC website:

http://www.cisco.com/tac

P3 and P4 level problems are defined as follows:

P3—Your network performance is degraded. Network functionality is noticeably impaired, but most business operations continue.

P4—You need information or assistance on Cisco product capabilities, product installation, or basic product configuration.

In each of the above cases, use the Cisco TAC website to quickly find answers to your questions.

To register for Cisco.com, go to the following website:

http://www.cisco.com/register/

If you cannot resolve your technical issue by using the TAC online resources, Cisco.com registered users can open a case online by using the TAC Case Open tool at the following website:

http://www.cisco.com/tac/caseopen

Contacting TAC by Telephone

If you have a priority level 1 (P1) or priority level 2 (P2) problem, contact TAC by telephone and immediately open a case. To obtain a directory of toll-free numbers for your country, go to the following website:

http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml

P1 and P2 level problems are defined as follows:

P1—Your production network is down, causing a critical impact to business operations if service is not restored quickly. No workaround is available.

P2—Your production network is severely degraded, affecting significant aspects of your business operations. No workaround is available.