Table Of Contents
Cisco MDS 9000 Family Release Notes for Storage Services Interface Image Release 5.0(4k)
Release Date: August 10, 2011
Text Part Number: OL-22148-06
This document describes the caveats and limitations for the Storage Service Interface (SSI) software for the various Cisco MDS Services Modules (SSN-16, MSM-18/4, and MDS 9222i). 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
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
•Data Mobility Manager (DMM)
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 SSI Release 5.0(4k) and includes the following topics:
Table 1 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.
Upgrade and Downgrade Caveats
This section provides information about upgrading to the current release or downgrading from it.
Downgrading from Cisco MDS SSI Release 5.0(4k)
A downgrade from SSI 5.0(4k) to any other SSI release is not supported when SANTap is provisioned. Uninstall SANTap before you start the downgrade process.
Upgrading to Cisco MDS SSI Release 5.0(4k)
Following a software upgrade to SSI Release 5.0(4k) in a 32-bit environment, you must unmount and remount all SCSI devices. The following procedure is specific to hosts or targets that see 32-bit LUN IDs. Follow these steps:
1. Quiesce all applications on the host.
2. Enter the following commands:
umount <file system>
varyoffvg <volume group>
exportvg <volume group>
3. Perform the upgrade.
4. Enter the following commands:
rmdev -dl <hdisk#> -R (Repeat this for all hdisks.)
lsdev -Cc disk (See if all the LUNs are discovered.)
lsattr -El <hdisk#> (Check LUN ID field to check that host sees the same LUN ID as the target LUN ID.)
importvg -y <volume group> <hdisk#> (Volume group name is same as the one that was exported earlier. hdisk# can be just one of the hdisks in the volume group.)
varyonvg <volume group>
mount <file system>
There are no new features in Cisco MDS SSI Release 5.0(4k).
This sections lists limitations or restrictions associated with this release.
GUI Support Not Available for Target IO Timeout DVT Configuration
A target IO timeout for DVT can only be configured through the CLI. GUI support for this configuration is not available in Cisco MDS SSI Release 5.0(4k).
A Username Must be Less Than Eighteen Characters
If you enter a SANTap command with a username that is equal to or greater than 18 characters, the error message "remuser too long" displays, as shown in the following example:switch# sh santap module 8 dvtremuser too long
The show ivr command and the show zoneset act command complete correctly.
This issue might be seen when you enter SANTap commands on the supervisor module to collect information from another module.
To work around this issue, do one of the following:
•Attach to the module and collect the information on the module itself.
•Use a username with less than 18 characters.
Processes May Fail Due to Low Memory on the MDS 9222i Switch
SANTap or iSAPI processes might fail on the Cisco MDS 9222i switch when the system runs into a low memory condition. The kernel ends the processes due to a lack of memory.
Because the MDS 9222i switch runs supervisor processes as well intelligent processes, memory utilization is high. In addition, debug files and core files that are saved locally can result in low memory resources. When low memory conditions occur, you might see a syslog message like the following on the supervisor before the processes are ended:"MEMORY_ALERT: Memory Status Alert : SEVERE. Usage 90% of Available Memory"
There are two ways you can work around this issue:
•Whenever there is a log or tech support collection, immediately copy the files that need to be saved to other servers and clean up the local file on the MDS 9222i switch to free up space.
•Save all core files on other servers and immediately clear or delete the local copies on MDS 9222i switch to free up space.
Before upgrading your SSI image, refer to the Cisco MDS NX-OS Release Compatibility Matrix for Storage Service Interface Images.
The SSI Release 5.0(4k) image is compatible with the Cisco MDS NX-OS Release 5.0(4), 5.0(4b), 5.0(4c), and 5.0(4d) images.
Note Cisco MDS SSI Release 5.0(4k) does not support the 32-port Storage Services Module (SSM), DS-X9032SSM. Refer the MDS 9000 Family Release Notes for NX-OS Release 5.0(1a) for additional information about Generation 1 modules that are not supported in Cisco MDS NX-OS Release 5.0(1a).
This section lists the open and resolved caveats for Cisco MDS SSI Release 5.0(4k). 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 2 Open and Resolved Caveats for Cisco MDS 9000 SSI Release 5.0(4k)
Symptom: The SANTap data path processor (DPP) may cause CRC errors in a multiple front-end or back-end VSAN configuration with a heavy I/O load.
Conditions: This symptom might be seen when SANTap is running on a Cisco MDS 9000 MSM-18/4 module or Cisco MDS 9222i module with a multiple front-end or back-end VSAN configuration, and there is a heavy I/O load on both VSANs.
Workaround: This issue is resolved.
Symptom: The DPP fails, which causes the Cisco MDS 9000 MSM-18/4 module to reload.
Conditions: This symptom might be seen when ports flap on the RecoverPoint Appliance.
Workaround: This issue is resolved.
Symptom: Following a successful upgrade of the SSI image on a Cisco MDS 9000 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: When you enter the system default switchport shutdown command, all iSAPI ports go down.
Symptom: If SANTap is configured on multiple modules on a switch and one of the modules is not provisioned, the SANTap Prevent Downgrade Capability is removed for the entire setup.
This symptom might be seen when more than one module in the switch is configured with SANTap and the configuration is removed from one of these modules. SANTap does not check for the presence of other modules before removing the capability.
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 5.0(1a), 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 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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