Table Of Contents
Release Notes for Cisco SN 5428-2 Storage Router Release 3.2.1
March 14, 2003
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 5428-2 Storage Router software release 3.2.1.
For a list of software caveats that apply to Release 3.2.1, see the "Open Caveats" section. The caveats are updated for every maintenance release and are located on Cisco.com and the Documentation CD-ROM.
These release notes describe the following topics:
The Cisco SN 5428-2 Storage Router provides universal access to storage over IP networks. The storage router software controls the operation of the Cisco SN 5428-2 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).
Note For more information about the iSCSI protocol, refer to the IETF standards for IP storage at http://www.ietf.org.
With SCSI routing, storage device access is managed primarily in the SN 5428-2. (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 5428-2 Storage Router software provides the following services:
•VLAN Access Control—provides IP access control to storage based on a VLAN identifier (VID) number (in addition to access control through access lists)
•Authentication—provides iSCSI, Enable and Login authentication using AAA authentication methods
•High Availability (HA)—provides the ability to group storage routers in a cluster for intelligent failover and other cluster-related functions (for SCSI routing only)
•E_Port with FC Fabric Zoning—provides the ability to connect FC ports to FC switches and participate in fabric zoning, manage zoning, and support zone mergers
•SNMP/MIB support—provides network management of the SN 5428-2 through SNMP using selected MIBs
•Gigabit Ethernet Interface features—provides the ability to assign a management IP address per Gigabit Ethernet interface, multiple IP addresses per SCSI routing instance, and an optional secondary Gigabit Ethernet interface per IP address used for SCSI routing or SN 5428-2 management
•Buffer credit extension—enables the SN 5428-2 to donate buffer credits from a donor port to selected FC ports
•Secure Sockets Layer support—provides HTTPS connection for secure access through the web-based GUI
•Secure Shell (SSH) protocol version 2 support—provides high encryption and authentication for interactive management sessions, and is a common replacement for Telnet
•Routing Information Protocol (RIP) listening support—allows the SN 5428-2 to learn dynamic routing using RIP (version 1 or version 2) listening
•Service Location Protocol (SLP) Support—provides the ability to advertise targets of specified SCSI routing instances
•TCP Window Tuning—provides the ability to maximize bandwidth across the network by automatically setting the local TCP receive window size to the remote TCP receive window size without user intervention
•A command-line interface (CLI) and a web-based GUI—provides user interfaces for configuration and maintenance of an SN 5428-2
Note The web-based GUI is not available in SN 5428-2s deployed for transparent SCSI routing.
This section describes the system requirements for Release 3.2.1 and includes the following information:
•The Gigabit Ethernet interfaces on the SN 5428-2 Storage Router use a flow control mechanism for stopping and starting traffic that prevents the loss of data. Flow control should also be turned on at the router's Gigabit Ethernet interfaces where the SN 5428-2 Storage Router is connected.
•If the SN 5428-2 Storage Router is participating in a cluster, and the HA or management interfaces are plugged into a switch that has Spanning Tree Protocol (STP) enabled, the storage router should be considered as an end station and the affected ports on the switch should be configured appropriately. For example, set "portfast" on Cisco switches to cause the ports to immediately switch from blocking mode to forwarding mode. This helps prevent time-outs, which can cause unexpected behavior when storage routers join a cluster.
To ensure the best performance for the SN 5428-2 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 5428-2. On the SN 5428-2 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 5428-2 Storage Router web-based GUI officially supports the following browsers:
Microsoft Internet Explorer version 5.5 with service pack 2, or later
Microsoft Windows NT 4.0, Microsoft Windows 2000
Netscape Navigator version 4.76
Netscape Navigator version 4.7
iSCSI Driver Version Support
A Cisco SN 5428-2 Storage Router running software release 3.2.1 or later is compatible with an IP host running any Cisco iSCSI Driver version 2.1.1 or later; it is not compatible with an IP host running any Cisco iSCSI Driver version 1.8.x.
A Cisco SN 5428-2 Storage Router running software release 3.2.1 or later is also compatible with a Cisco SN 5420 Storage Router deployed for iSCSI SAN Interconnect.
SN 5428-2 interoperability information is available on Cisco.com. You can access the interoperability matrix by following these instructions:
Step 1 At http://www.cisco.com, Click Products & Services, and select Storage Networking Products from the menu.
Step 2 At the Cisco Storage Networking Products web page, click the Cisco SN 5400 Series Storage Routers link.
Step 3 At the Cisco SN 5400 Series Storage Routers web page, click Instructions and Guides from the navigation menu on the left side of the page.
Step 4 Click the Technical References link, and then click the Cisco SN 5428-2 Storage Router Interoperability Test Matrix link.
This section describes how to obtain updated SN 5428-2 software and upgrade an existing SN 5428-2 software installation, and includes the following information:
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, release notes and example configuration files 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:
Step 1 At http://www.cisco.com, log in to Cisco.com. Click Technical Support and Software Center.
Step 2 At the Software Center web page, under Software Products & Downloads, click Storage Networking Software.
Step 3 At the Storage Networking Software web page, click the appropriate link for your software.
Step 4 At the Software Download web page, click the file that you want to download.Another software download web page will be displayed with detailed information about the download file and Cisco's Software License Agreement. Follow the instructions on that and any subsequent web pages to download the software.
Step 5 To install and configure storage router software, see the appropriate storage router software configuration guide and release notes. To install and configure an iSCSI driver, see the readme file that accompanies the iSCSI driver (in the downloaded driver archive file) and the appropriate release notes.
Configuration guides and release notes are available online. You can access online documentation by following these instructions:
Step 1 At http://www.cisco.com, click Products & Services and Storage Networking Products.
Step 2 At the Cisco Storage Networking Products web page, click Cisco SN 5400 Series Storage Routers.
Step 3 At the Cisco SN 5400 Series Storage Routers web page, click Instructions and Guides. On the Instructions and Guides web page, choose the appropriate link for documentation, release notes, or other related information.
Determining the SN 5428-2 Software Version
To determine the version of SN 5428-2 software running on the Cisco SN 5428-2 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 5428-2 software by using the SN 5428-2 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[SN5428-2A01]$ show versionCisco SN 5428-2 Storage RouterCLI Version: 2.1iSCSI Version: 2/2 (Min/Max)System Bootstrap: 3.2.1-K9Operating System: 3.2.1-K9Application: 3.2.1-K9Web Server: R6_1_0OpenSSH: 3.4p1OpenSSL: 0.9.6eZlib: 1.1.4Copyright (c) 1986-2002 by Cisco Systems, Inc
Upgrading to a New Software Release
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 3.2.
To upgrade to new SN 5428-2 software using the web-based GUI, follow these instructions.
Step 1 In the web-based GUI, log in as "admin". To access the GUI, enter the URL for the SN 5428-2 by pointing your browser to the SN 5428-2 management interface IP address using the HTTP protocol (for example, type http://10.1.10.244).
Step 2 Click Maintenance to view information about the software versions currently available to the storage router. If multiple versions of software are available, delete all versions except the currently running version.
Step 3 (Optional) Based on your storage router configuration, click the appropriate link in the Upgrade section of the Maintenance dynamic menu list in the left frame to download a list of currently available software versions. Use this list to determine the software version you want to download.
Step 4 Click the appropriate link in the Upgrade section of the Maintenance dynamic menu list to download the desired version of software.
Step 5 After you have downloaded the new version of software, click Reset in the System section of the Maintenance dynamic menu list.
Step 6 At Select next boot version, select the new software version. If you have made configuration changes to the storage router that have not been saved, click the Save unsaved changes? checkbox to save any configuration changes that have been made but not saved to the storage router's bootable configuration
Step 7 Click Reset System.
Step 8 After the storage router has rebooted, verify that it is running the new software. (See the "Determining the SN 5428-2 Software Version" section.)
Limitations and Restrictions on SN 5428-2 Storage Router Clusters
This release includes the following restrictions on SN 5428-2 Storage Router clusters:
•A cluster can be composed of up to two SN 5428-2 Storage Routers, or one SN 5428-2 and one SN 5428 Storage Router.
•A cluster can support up to 12 SCSI routing instances.
•A cluster can support up to 100 iSCSI targets.
Caveats describe unexpected behavior or defects in SN 5428-2 software releases. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious.
This document describes open severity 1 and 2 caveats and selected caveats of other severities. 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:
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.
If an SNMP set request is issued with multiple variable bindings, and there is an error with one of the bindings (for example, trying to set a read-only object), the set request to the other bindings are allowed to complete. The SNMP V1 and V2 specs specify that if any of the set operations to the bindings in a SNMP set request fail, none of them should be done.
Workaround: Only issue an SNMP set request with a single variable binding.
The following sections describe the related documentation available for Cisco SN 5428-2 Storage Router Release 3.2.1. These documents consist of hardware installation and software configuration guides, and platform-specific release notes, readme and example configuration files for the Cisco iSCSI drivers.
This release notes document is the only document specific to SN 5428-2 Release 3.2.1. It is only available as an electronic document on Cisco.com and the Documentation CD-ROM.
Platform-specific documents consist of the release notes, readme and example configuration files for Cisco iSCSI drivers, version 2.1.x, 2.2.x, and 3.1.x. The files are currently available in electronic format only. See the "Obtaining Updated Software and iSCSI Drivers" section for details.
Refer to the Cisco SN 5428-2 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.
Refer to the Cisco SN 5428-2 Storage Router Software Configuration Guide Release 3.2, 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 5428-2 web-based GUI, refer to the SN 5428-2 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 5428-2 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:
Step 1 At http://www.cisco.com, log in to Cisco.com. Click Technical Support, and select Hardware Support from the menu.
Step 2 At the Hardware Support web page, click Storage Networking Devices from the Hardware Support menu on the left side of the page.
Step 3 At the Storage Networking Devices web page, click the appropriate link for your system. For example, click the SN 5428-2 Storage Routers link.
Step 4 Click the Troubleshooting link, and then click the appropriate links for information about installing, configuring, and troubleshooting SN 5400 Series system software and iSCSI drivers.
These sections explain how to obtain documentation from Cisco Systems.
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•The Cisco Product Catalog describes the networking products offered by Cisco Systems as well as ordering and customer support services. Access the Cisco Product Catalog at this URL:
•Cisco Press publishes a wide range of networking publications. Cisco suggests these titles for new and experienced users: Internetworking Terms and Acronyms Dictionary, Internetworking Technology Handbook, Internetworking Troubleshooting Guide, and the Internetworking Design Guide. For current Cisco Press titles and other information, go to Cisco Press online at this URL:
•Packet magazine is the Cisco monthly periodical that provides industry professionals with the latest information about the field of networking. You can access Packet magazine at this URL:
•iQ Magazine is the Cisco monthly periodical that provides business leaders and decision makers with the latest information about the networking industry. You can access iQ Magazine at this URL:
•Internet Protocol Journal is a quarterly journal published by Cisco Systems for engineering professionals involved in the design, development, and operation of public and private internets and intranets. You can access the Internet Protocol Journal at this URL:
•Training—Cisco offers world-class networking training, with current offerings in network training listed at this URL:
Obtaining Technical Assistance
Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain online documentation, troubleshooting tips, and sample configurations from online tools by using the Cisco Technical Assistance Center (TAC) Web Site. Cisco.com registered users have complete access to the technical support resources on the Cisco TAC Web Site.
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Cisco TAC Web Site
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If you are a Cisco.com registered user, and you cannot resolve your technical issues by using the Cisco TAC Web Site, you can open a case online by using the TAC Case Open tool at this URL:
If you have Internet access, we recommend that you open P3 and P4 cases through the Cisco TAC Web Site.
Cisco TAC Escalation Center
The Cisco TAC Escalation Center addresses priority level 1 or priority level 2 issues. These classifications are assigned when severe network degradation significantly impacts business operations. When you contact the TAC Escalation Center with a P1 or P2 problem, a Cisco TAC engineer automatically opens a case.
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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.