Table Of Contents
Cisco MDS 9000 Family Release Notes for Storage Services Interface Image Release 4.2(3k)
Release Date: November 29, 2010
Part Number: OL-20651-07 D0
This document describes the caveats and limitations for the Storage Service Interface (SSI) software for the various Cisco MDS Services Modules (SSM, MSM-18/4, and MDS 9222i module). Use this document in conjunction with the documents listed in the "Related Documentation" section.
Note Release notes are sometimes updated with new information on restrictions and caveats. Refer to the following website for the most recent version of the Cisco MDS 9000 Family Release Notes: http://www.cisco.com/en/US/products/ps5989/prod_release_notes_list.html
Table 1 shows the on-line change history for this document.
Table 1 Online History Change
Revision Date Description
Created release notes.
Added DDTS CSCtj06133.
Removed DDTS CSCtj06133, and added the information associated with this caveat to the "Limitations" section.
This document includes the following sections:
The SSI interface provides the following features:
•Network-based volume management (EMC Invista, Incipient iNSP)
•Network-assisted storage applications using SANTap
•Fibre Channel Write Acceleration (FC-WA) and SCSI flow statistics
•Network-Accelerated Serverless Backup (NASB)
•Data Mobility Manager (DMM)
•Secure Data Erase
Note As of NX-OS Release 4.1(1b), SAN-OS has been changed to NX-OS. References to SAN-OS releases before 4.1(1b) still apply.
This section describes the system requirements for Cisco MDS NX-OS Release 4.2(3k) and includes the following topics:
Table 2 lists the software and hardware components supported by the Cisco MDS 9000 Family.
Determining the Software Version
Note Use the latest available software release supported by your vendor for all Cisco MDS 9000 Family products.
To determine the version of the Cisco NX-OS software currently running on a Cisco MDS 9000 Family switch using the CLI, log into the switch and enter the show version command.
To determine the version of the Cisco NX-OS software currently running on a Cisco MDS 9000 Family switch using the Fabric Manager, from the Switches tab in the information pane, locate the switch using the IP address, logical name, or WWN, and then check its version in the Release column.
To download the latest Cisco software, access the Software Center at this URL:
Note If you would like to request code to be provided under the terms of either GNU General Public License (GPL) or the GNU Lesser General Public License (LGPL), contact firstname.lastname@example.org.
If SSMs are present in a Cisco MDS 9000 Family switch, these upgrades may be performed as required:
•Upgrading a previously provided package
•Upgrading the SAN-OS image
•Reformatting the SSM add-on image
If you need additional information about installing or upgrading the SSM, refer to the Cisco MDS 9000 Family Storage Services Module Software Installation and Upgrade Guide.
This section describes the new features introduced in this release. For more information about the features listed, see the documentation set listed in the"Obtaining Documentation and Submitting a Service Request" section.
The SSI Release 4.2(3k) image is compatible with the following Cisco MDS NX-OS Releases: 4.2(3), 4.2(3a), 4.2(7a), and 4.2(7b).
There are no new features in this release.
This sections lists limitations or restrictions associated with this release.
Length of SANTap Commands
If you execute a SANTap command that is equal to or greater than 18 characters, the command fails and displays an error message like the following:switch# sh santap module 8 dvtremuser too long
Commands that have fewer characters, such as the sh ivr command or the sh zoneset act command, execute correctly.
You might see this issue if you are collecting information from the supervisor module and you attempt to execute SANTap commands that are 18 characters in length or more.
There are two ways to work around this issue:
•Attach to the module and collect the information on the module itself.
•Enter a command with less than 18 characters.
SANTap Does Not Support VMware vStorage APIs for Array Integration
The Cisco MDS SSI Release 4.2(3k) image for SANTap is not compatible with the Hardware Acceleration vStorage APIs for Array Integration (VAAI) feature of vSphere 4.1.
Table 3 lists the SCSI commands that are issued as part of vSphere 4.1 Hardware Acceleration.
Table 3 SCSI Commands That are Issued in vSphere 4.1 Hardware Acceleration
Write same (16)
Compare and Write
Compare and Swap
For more information about the vSphere 4.1 Hardware Acceleration feature, go to this URL:
Configuring SSM Ports in Auto Mode
Starting with Cisco MDS SAN-OS Release 3.0(1), the SSM front panel ports can no longer be configured in auto mode. Because auto mode is the default for releases prior to Release 3.0(1), you should modify the configuration of the ports before upgrading the SAN-OS software image to NX-OS Release 4.2(3a) to avoid any traffic disruption.
For information on how to reconfigure the SSM ports, refer to the "Reconfiguring SSM Ports Before Upgrading to NX-OS Release 4.2(3a)" section of the Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Release 4.2(3a).
Before upgrading your SSI image, refer to the Cisco MDS NX-OS Release Compatibility Matrix for Storage Service Interface Images, and to Table 11 in the MDS 9000 Family Release Notes for NX-OS Release 4.2(3a). Use Table 11 to determine your nondisruptive upgrade path to Cisco MDS NX-OS Release 4.2(3k).
Note If you are using SANTap in your environment, you cannot upgrade directly from SAN-OS Release 3.3.x to NX-OS Release 4.2. The only supported upgrade path for SANTap environments is from SAN-OS Release 3.3.x to NX-OS Release 4.1.x to NX-OS Release 4.2.
This section lists the open and resolved caveats for Cisco MDS SSI Release 4.2(3k). Use Table 2 to determine the status of a particular caveat. In the table, "O" indicates an open caveat and "R" indicates a resolved caveat.
Table 4 Open and Resolved Caveats for Cisco MDS 9000 SSI Release 4.2(3k)
Symptom: SANTap fails when the ARL log is retrieved for a session with 2 TB LUNs.
Workaround: This issue is resolved.
Symptom: The SANTap data path processor (DPP) on a AIX host behaves like the NACA bit is not set, even though the bit was set by the Test Unit Ready command.
Workaround: This issue is resolved.
Symptom: A Cisco MDS 9000 switch running SANTap with SSI Release 4.2(3i) reports to the host one less LUN from the front end VSAN than the storage device in the back end VSAN reported.
Workaround: This issue is resolved.
Symptom: A DPP failure causes a Cisco MDS MSM-18/4 module to reload when ESX version 4.1 hosts enable the hardware acceleration feature in a SANTap Recoverpoint environment. This symptom might occur when an ESX 4.1 host is configured to use hardware acceleration.
Workaround: This issue is resolved.
Symptom: Following an upgrade from Cisco MDS NX-OS Release 4.1(3a) with SSI Release 4.1(3m) to NX-OS Release 4.2(3a) with SSI Release 4.2(3i), the SNMP process may fail.
Symptom: Following a successful upgrade of the SSI image on a Cisco MDS MSM-18/4 module where SANTap is enabled, SANTap may go into an unknown state.
Workaround: After the upgrade is completely finished, manually reload the Cisco MDS MSM-18/4 module to recover from the unknown state.
Symptom: The SANTap DPP may cause CRC errors in a multiple a FE/BE VSAN setup with a heavy I/O load.
Conditions: This symptom might be seen when SANTap is running on a Cisco MDS MSM-18/4 modulue or Cisco MDS 9222i module with a multiple FE/BE VSAN configuration, and there is a heavy I/O load on both VSANs.
Symptom: A critical error such as a DPP failure on a service module running SANTap may result in a module or switch reload. The reload may take an extra 10 minutes on a Cisco MDS MSM-18/4 module or a MDS 9222i supervisor module that is running SANTap.
Conditions: This symptom may be seen only when SANTap is running on the Cisco MDS MSM-18/4 module or on a Cisco MDS 9222i supervisor module.
Workaround: None. The delay in the module or switch reload does not have any side effects.
Symptom: If you enter the vsan delete command before all SANTap objects are cleared, some SANTap objects may go into an error state due to iSAPI race condition issues.
Workaround: Clean up all SANTap objects before you enter the vsan delete command.
Symptom: When you enter the system default switchport shutdown command, all iSAPI ports go down.
The documentation set for NX-OS for the Cisco MDS 9000 Family includes the following documents. To find a document online, access the following web site:
The documentation set for Cisco Fabric Manager appears in the Cisco Fabric Manager Release Notes for Release 4.2(3a), which is available from the following website:
•Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Releases
•Cisco MDS 9000 Family Release Notes for MDS SAN-OS Releases
•Cisco MDS 9000 Family Release Notes for Storage Services Interface Images
•Cisco MDS 9000 Family Release Notes for Cisco MDS 9000 EPLD Images
Regulatory Compliance and Safety Information
•Regulatory Compliance and Safety Information for the Cisco MDS 9000 Family
•Cisco Data Center Interoperability Support Matrix
•Cisco MDS 9000 NX-OS Hardware and Software Compatibility Information and Feature Lists
•Cisco MDS NX-OS Release Compatibility Matrix for Storage Service Interface Images
•Cisco MDS 9000 Family Switch-to-Switch Interoperability Configuration Guide
•Cisco MDS NX-OS Release Compatibility Matrix for IBM SAN Volume Controller Software for Cisco MDS 9000
•Cisco MDS SAN-OS Release Compatibility Matrix for VERITAS Storage Foundation for Networks Software
•Cisco MDS 9500 Series Hardware Installation Guide
•Cisco MDS 9500 Series Supervisor-2A Module Tech Note
•Cisco MDS 9200 Series Hardware Installation Guide
•Cisco MDS 9100 Series Hardware Installation Guide
•Cisco MDS 9124 and Cisco MDS 9134 Multilayer Fabric Switch Quick Start Guide
Software Installation and Upgrade
•Cisco MDS 9000 NX-OS Release 4.1(x) and SAN-OS 3(x) Software Upgrade and Downgrade Guide
•Cisco MDS 9000 Family Storage Services Interface Image Install and Upgrade Guide
•Cisco MDS 9000 Family Storage Services Module Software Installation and Upgrade Guide
•Cisco MDS 9000 Family NX-OS Licensing Guide
•Cisco MDS 9000 Family NX-OS Fundamentals Configuration Guide
•Cisco MDS 9000 Family NX-OS System Management Configuration Guide
•Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
•Cisco MDS 9000 Family NX-OS Fabric Configuration Guide
•Cisco MDS 9000 Family NX-OS Quality of Service Configuration Guide
•Cisco MDS 9000 Family NX-OS Security Configuration Guide
•Cisco MDS 9000 Family NX-OS IP Services Configuration Guide
•Cisco MDS 9000 Family NX-OS Intelligent Storage Services Configuration Guide
•Cisco MDS 9000 Family NX-OS High Availability and Redundancy Configuration Guide
•Cisco MDS 9000 Family NX-OS Inter-VSAN Routing Configuration Guide
•Cisco MDS 9000 Family Command Reference
Intelligent Storage Networking Services Configuration Guides
•Cisco MDS 9000 I/O Acceleration Configuration Guide
•Cisco MDS 9000 Family SANTap Deployment Guide
•Cisco MDS 9000 Family Data Mobility Manager Configuration Guide
•Cisco MDS 9000 Family Storage Media Encryption Configuration Guide
•Cisco MDS 9000 Family Secure Erase Configuration Guide
•Cisco MDS 9000 Family Cookbook for Cisco MDS SAN-OS
Troubleshooting and Reference
•Cisco NX-OS System Messages Reference
•Cisco MDS 9000 Family NX-OS Troubleshooting Guide
•Cisco MDS 9000 Family NX-OS MIB Quick Reference
•Cisco MDS 9000 Family NX-OS SMI-S Programming Reference
Obtaining Documentation and Submitting a Service Request
For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:
Subscribe to the What's New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0.
This document is to be used in conjunction with the documents listed in the "Related Documentation" section.
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