Table Of Contents
Release Notes for Cisco SN 5428 Storage Router, Release 3.4.1
Obtaining Updated Software and iSCSI Drivers
Determining the SN 5428 Software Version
Upgrading to a New Software Release
Limitations and Restrictions on SN 5428 Storage Router Clusters
Software Configuration Tips on the Cisco TAC Home Page
Obtaining Technical Assistance
Obtaining Additional Publications and Information
Release Notes for Cisco SN 5428 Storage Router, Release 3.4.1
September 26, 2003
These release notes support Cisco SN 5428 Storage Router software release 3.4.1.
For a list of software caveats that apply to Release 3.4.1, 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:
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Limitations and Restrictions on SN 5428 Storage Router Clusters
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Introduction
The Cisco SN 5428 Storage Router provides universal access to storage over IP networks. The storage router software controls the operation of the Cisco SN 5428 Storage Router. You can configure the software to provide one of two types of access to storage over IP networks; either SCSI routing or Transparent SCSI routing.
SCSI routing provides IP hosts with access to Fibre Channel (FC) storage devices, using iSCSI protocol. The iSCSI protocol is an IETF-defined protocol for IP storage (ips).
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With SCSI routing, storage device access is managed primarily in the SN 5428. (See Figure 1.)
Figure 1 SCSI Routing
Transparent SCSI routing provides IP hosts with transparent access to intelligent storage arrays using iSCSI protocol; that is, each IP host is presented as an FC host to an intelligent storage array. With transparent SCSI routing, availability of storage devices is managed primarily in the intelligent storage array. (See Figure 2.)
Figure 2 Transparent SCSI Routing
In addition to providing services for accessing storage over IP networks, the SN 5428 Storage Router software provides the following services:
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System Requirements
This section describes the system requirements for release 3.4.1 and includes the following information:
Network Equipment
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IP Hosts
To ensure the best performance for the SN 5428 Storage Router and 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 IP hosts connecting to the SN 5428. On the SN 5428 Storage Router, you can use the CLI show scsirouter all connection tcp command to display the current and maximum TCP window size for each connected host.
Graphical User Interface
The SN 5428 Storage Router web-based GUI officially supports the following browsers. The browser must be enabled to support JavaScript and style sheets.
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iSCSI Driver Version Support
A Cisco SN 5428 Storage Router running software release 3.4.1 or later is interoperable with an IP host running any Cisco iSCSI Driver version 2.1.1 or later. It is not interoperable with an IP host running any Cisco iSCSI Driver version 1.8.x.
Interoperability Information
SN 5428 interoperability information is available on Cisco.com. You can access the interoperability matrix by following these instructions:
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Installation Notes
This section describes how to obtain updated SN 5428 software and upgrade an existing SN 5428 software installation, and includes the following information:
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Obtaining Updated Software and iSCSI Drivers
Registered Cisco.com users can download the most current SN 5400 Series system software, Cisco iSCSI drivers, readme files and release notes from Cisco.com. In addition, information about driver compatibility and other relevant driver information is available on Cisco.com. You can access software and related information by following these instructions:
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Determining the SN 5428 Software Version
To determine the version of SN 5428 software running on the Cisco SN 5428 Storage Router, establish a Telnet or console port session with the storage router, and enter the CLI show version command. (See Example 1.) The Application field displays the version of software currently running on the storage router. The System Bootstrap field displays the software version that will run the next time the storage router is restarted.
You can also check the version of the SN 5428 software by using the SN 5428 web-based GUI. Log in as monitor to display the Processor and Software Information table, or click Processor and SW (under System) in the Monitor dynamic menu list in the left frame. The Software Version field contains the current software version information.
Example 1 Determining the Software Version
[SN5428A01]$ show versionCisco SN 5428-K9 Storage RouterCLI Version: 2.1iSCSI Version: 0/2 (Min/Max)System Bootstrap: 3.4.1-K9Operating System: 3.4.1-K9Switch Version: V1.5.1.10-0Application: 3.4.1-K9Web Server: R6_1_0OpenSSH: 3.4p1OpenSSL: 0.9.6eZlib: 1.1.4Copyright (c) 1986-2003 by Cisco Systems, IncUpgrading to a New Software Release
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For information about upgrading to new SN 5428 software using the CLI, see the section "Installing Updated Software" in Chapter 10, "Maintaining and Managing the SN 5428 Storage Router," of the Cisco SN 5428 Storage Router Software Configuration Guide, Release 3.4.
To upgrade to new SN 5428 software using the web-based GUI, follow these instructions.
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If the storage router is deployed for transparent SCSI routing, the upgrade from version 2.5.1 or 3.2.x to version 3.4.1 places the storage router in dynamic mode. Dynamic mode resets iSCSI client-to-FC WWPN bindings upon reboots or iSCSI logouts, and requires an intelligent storage array that supports an extended iSCSI FC PLOGI frame. To change the mode of an existing transparent SCSI routing deployment, you must completely clear the storage router configuration. When the storage router reboots, follow the prompts from the initial configuration script to complete the new system configuration and select the desired mode for transparent SCSI routing.
For more information about clearing the storage router configuration, see the section "Resetting the System" in Chapter 10, "Maintaining and Managing the SN 5428 Storage Router," of the Cisco SN 5428 Storage Router Software Configuration Guide, Release 3.4.
For more information about static and dynamic modes for transparent SCSI routing, see the section "Summary of Configuration Process" in Chapter 7, "Configuring Transparent SCSI Routing," of the Cisco SN 5428 Storage Router Software Configuration Guide, Release.3.4.
Uninstalling an Upgrade
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To return to a previous SN 5428 software release, and remove the updated SN 5428 software using the CLI, follow these instructions:
To return to a previous SN 5428 software release and remove the updated SN 5428 software using the SN 5428 web-based GUI, follow these instructions:
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New and Changed Information
This section describes new and changed features in Release 3.4.1, and includes the following information:
New Features
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New CLI Commands
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Modified CLI Commands
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Limitations and Restrictions on SN 5428 Storage Router Clusters
This release includes the following restrictions on SN 5428 Storage Router clusters:
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Caveats
Caveats describe unexpected behavior or defects in the specified SN 5428 software release. 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, for release 3.4.1.
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Within the sections, the caveats are sorted alphanumerically by caveat number.
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http://www.cisco.com/pcgi-bin/Support/Bugtool/launch_bugtool.pl.
Open Caveats
The caveats listed in this section are open in SN 5428 software release 3.4.1.
SCSI
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Compaq SecurePath Manager software does not work with iSCSI and an MSA1000. This configuration is not currently supported.
Workaround: None.
Resolved Caveats
The caveats listed in this section are resolved in SN 5428 software release 3.4.1.
FC-Driver
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The host aborts pending SCSI commands that fail to complete within the timeout period, and SCSI Read commands complete with Data Underrun conditions. This problem may occur when SCSI traffic is running over an E-port between two storage routers and the target device is connected to the fabric via an arbitrated loop. This problem has been observed with target devices that use half-duplex OPNs to the storage router when sending frames to the initiator.
The server may automatically recover from these errors, so they may only appear as intermittent performance issues.
Workaround: If possible, change the target device connection topology to point-to-point instead of arbitrated loop. This is a permanent workaround; full problem resolution requires ASIC modification.
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The storage router is unable to send or receive traffic on the FC interface that is bridged to an iSCSI interface. The interface immediately closes all attempted Opens from other devices on the arbitrated loop. The FC interface erroneously believes that it is unable to accept frames from any device on the loop.
This condition has been observed when a large number of SCSI commands from the iSCSI interface are aborted. This results in a large number of ABTS frames on the FC interface.
Workaround: Disconnect and reconnect the storage router FC initiator interface, or restart the initiator interface. For example, issue the following command to restart the fci1 interface:
[SN5428A] debug interface fci1 lldRestartfcfwFC-Switch
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SNMP Walks of the FCMGMT MIB may result in the following error:
%SNMP-3-FSSPRQF: fcSwSnmpPktReqeust() failed.The Network Management tool(s) may report "Generic error" and the fail the MIB walk. This can occur when there are many devices.
Workaround: Use the GUI Monitor Fibre Channel screen or the CLI show interface command to display fibre channel interface information.
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The storage router is unable to send or receive traffic on the FC interface, because the interface is caught in a loop initialization state. This condition has been observed in conjunction with a large number of ABTS frames on the loop.
Workaround: Disconnect and reconnect the storage router FC interface or reset the interface. For example, issue the following commands to reset the fc1 interface:
[SN5428A] no interface fc1 enable[SN5428A]* interface fc1 enable•
The integrated FC switch software may hang the port after the timeout, instead of aborting the frame. The port may hang if a frame cannot be delivered in the configured error detect timeout value (edtov). The port hang would only occur if error detect timeout value for all Fibre Channel interfaces is set to a value other than 1200 milliseconds. The default setting is 2000 milliseconds.
Workaround: If unexplained port hangs occur, set the error detect timeout value to 1200. For example, issue the following CLI command:
[Lab1] fcswitch edtov 1200You may need to change the error detect timeout values on other devices in your fabric. Error detect timeout values should be the same for all storage routers or switches in the fabric.
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LUNs or ports on a Compaq 4100 storage array connected to a storage router are not visible. The CLI command show devices will show no ports or LUNs. This problem occurs even if the storage router port type is TL-port.
Workaround: None. This problem is resolved in release 3.4.1.
GUI
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SN 5428 software download fails when using the HTTP Put File function from Microsoft Internet Explorer version 5.5 with service pack 2. The user may receive a "page cannot be displayed error" or the download may appear to hang. This is bug in Microsoft Internet Explorer.
Workaround: Use Microsoft Internet Explorer 6.0 to download SN 5428 software using the HTTP Put File function. This is a permanent workaround, as the bug will not be resolved in any previous version of Internet Explorer.
Related Documentation
The following sections describe the related documentation available for Cisco SN 5428 Storage Router release 3.4.1. These documents consist of hardware installation and software configuration guides, and platform-specific release notes and readme files for the Cisco iSCSI drivers.
Release-Specific Documents
This release notes document is the only document specific to SN 5428 release 3.4.1. 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 and readme files for Cisco iSCSI Drivers, version 2.1.x or later The files are available in electronic format only. See the "Obtaining Updated Software and iSCSI Drivers" section for details.
Hardware Documents
Refer to the Cisco SN 5428 Storage Router Hardware Installation Guide for hardware installation procedures. This document is available as an electronic document on Cisco.com and the Documentation CD-ROM.
Software Documents
Refer to the Cisco SN 5428 Storage Router Software Configuration Guide Release 3.4, for configuration information and procedures. This document is available as an electronic document on Cisco.com and the Documentation CD-ROM.
Refer to the Cisco SN 5400 Series Storage Router Command Reference, Release 3.4, for information about the CLI command interface. This document is available as an electronic document on Cisco.com and the Documentation CD-ROM.
For documentation on the SN 5428 web-based GUI, refer to the SN 5428 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.
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For service and support for a product purchased directly from Cisco, use Cisco.com.
Software Configuration Tips on the Cisco TAC Home Page
A variety of Cisco SN 5428 Storage Router software installation, configuration and usage tips are available on the Cisco Technical Assistance Center (TAC) Web Site.
You can access "tech tips" by following these instructions:
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Obtaining Documentation
Cisco provides several ways to obtain documentation, technical assistance, and other technical resources. These sections explain how to obtain technical information from Cisco Systems.
Cisco.com
You can access the most current Cisco documentation on the World Wide Web at this URL:
http://www.cisco.com/univercd/home/home.htm
You can access the Cisco website at this URL:
International Cisco websites can be accessed from this URL:
http://www.cisco.com/public/countries_languages.shtml
Documentation CD-ROM
Cisco documentation and additional literature are available in a Cisco Documentation CD-ROM package, which may have shipped with your product. The Documentation CD-ROM is updated regularly and may be more current than printed documentation. The CD-ROM package is available as a single unit or through an annual or quarterly subscription.
Registered Cisco.com users can order a single Documentation CD-ROM (product number DOC-CONDOCCD=) through the Cisco Ordering tool:
http://www.cisco.com/en/US/partner/ordering/ordering_place_order_ordering_tool_launch.html
All users can order annual or quarterly subscriptions through the online Subscription Store:
http://www.cisco.com/go/subscription
Ordering Documentation
You can find instructions for ordering documentation at this URL:
http://www.cisco.com/univercd/cc/td/doc/es_inpck/pdi.htm
You can order Cisco documentation in these ways:
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http://www.cisco.com/en/US/partner/ordering/index.shtml
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Documentation Feedback
You can submit comments electronically on Cisco.com. On the Cisco Documentation home page, click Feedback at the top of the page.
You can send your comments in e-mail to bug-doc@cisco.com.
You can submit comments by using the response card (if present) behind the front cover of your document or by writing to the following address:
Cisco Systems
Attn: Customer Document Ordering
170 West Tasman Drive
San Jose, CA 95134-9883We appreciate your comments.
Obtaining Technical Assistance
For all customers, partners, resellers, and distributors who hold valid Cisco service contracts, the Cisco Technical Assistance Center (TAC) provides 24-hour, award-winning technical support services, online and over the phone. Cisco.com features the Cisco TAC website as an online starting point for technical assistance.
Cisco TAC Website
The Cisco TAC website (http://www.cisco.com/tac) provides online documents and tools for troubleshooting and resolving technical issues with Cisco products and technologies. The Cisco TAC website is available 24 hours a day, 365 days a year.
Accessing all the tools on the Cisco TAC website requires a Cisco.com user ID and password. If you have a valid service contract but do not have a login ID or password, register at this URL:
http://tools.cisco.com/RPF/register/register.do
Opening a TAC Case
The online TAC Case Open Tool (http://www.cisco.com/tac/caseopen) is the fastest way to open P3 and P4 cases. (Your network is minimally impaired or you require product information). After you describe your situation, the TAC Case Open Tool automatically recommends resources for an immediate solution. If your issue is not resolved using these recommendations, your case will be assigned to a Cisco TAC engineer.
For P1 or P2 cases (your production network is down or severely degraded) or if you do not have Internet access, contact Cisco TAC by telephone. Cisco TAC engineers are assigned immediately to P1 and P2 cases to help keep your business operations running smoothly.
To open a case by telephone, use one of the following numbers:
Asia-Pacific: +61 2 8446 7411 (Australia: 1 800 805 227)
EMEA: +32 2 704 55 55
USA: 1 800 553-2447For a complete listing of Cisco TAC contacts, go to this URL:
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml
TAC Case Priority Definitions
To ensure that all cases are reported in a standard format, Cisco has established case priority definitions.
Priority 1 (P1)—Your network is "down" or there is a critical impact to your business operations. You and Cisco will commit all necessary resources around the clock to resolve the situation.
Priority 2 (P2)—Operation of an existing network is severely degraded, or significant aspects of your business operation are negatively affected by inadequate performance of Cisco products. You and Cisco will commit full-time resources during normal business hours to resolve the situation.
Priority 3 (P3)—Operational performance of your network is impaired, but most business operations remain functional. You and Cisco will commit resources during normal business hours to restore service to satisfactory levels.
Priority 4 (P4)—You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations.
Obtaining Additional Publications and Information
Information about Cisco products, technologies, and network solutions is available from various online and printed sources.
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http://www.cisco.com/en/US/products/products_catalog_links_launch.html
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http://www.cisco.com/go/packet
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http://www.cisco.com/go/iqmagazine
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http://www.cisco.com/en/US/about/ac123/ac147/about_cisco_the_internet_protocol_journal.html
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http://www.cisco.com/en/US/learning/index.html
This document is to be used in conjunction with the documents listed in the "Related Documentation" section.
Copyright © 2003 Cisco Systems, Inc. All rights reserved.
