Cisco MDS 9000 Series Release Notes, Release 9.4(2)
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This document describes the features, issues, and deployment guidelines for the Cisco MDS NX-OS software for use on the Cisco MDS 9000 Series Switches.
Note:
● Cisco MDS 9000 NX-OS 9.4(2) software release is affected by software defect CSCwk14579, which may cause authentication failures after the upgrade, only in the case where TACACS is used as authentication protocol. If you are using TACACS and are considering an upgrade to Cisco MDS 9000 NX-OS 9.4(2), we are recommending to postpone the upgrade. A future release, available shortly, will contain the fix for this issue. If the upgrade to Cisco MDS 9000 NX-OS 9.4(2) is required and TACACS is being used as the authentication protocol, then a workaround is available. Please review the workaround section in the software defect CSCwk14579.
● The documentation set for this product strives to use bias-free language. For this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product.
● Release notes are updated on an as needed basis with new information on restrictions and issues. See the following website for the most recent version of the Cisco MDS 9000 Series Release Notes.
| Date |
Description |
| May 11,2024 |
Initial Release |
Introduction
The Cisco MDS 9000 Series of Multilayer Directors and Fabric Switches provide best-in-class high availability, scalability, security, and management that enables to deploy high-performance storage area networks. Layering a rich set of intelligent features onto a high-performance switch fabric, the Cisco MDS 9000 Series has the flexibility to fit small deployments and to address the stringent requirements of large data center storage environments: high availability, security, scalability, sustainability, ease of management, and seamless integration of new technologies.
About Software Images
The Cisco MDS NX-OS operating system is shipped with the Cisco MDS 9000 Series Switches. The Cisco MDS NX-OS software consists of two images: the kickstart image and the system image. These images can be upgraded or downgraded to different versions. The versions of both images must match for the system to boot.
Each model of the Cisco MDS switch has unique kickstart and system images. For more information on the image names for each Cisco MDS switch, see the Cisco MDS 9000 NX-OS Software Upgrade and Downgrade Guide, Release 9.x.
To download the new Cisco MDS 9000 Series Switches NX-OS software, go to the Storage Networking Software download website at https://software.cisco.com/download/find/MDS.
Cisco MDS 9000 Series Switches contain a number of hardware components with updatable firmware. The Transceiver Firmware bundle contains updates for various port transceivers. The EPLD Firmware bundle contains updates for programmable logic devices in the system.
These updates can be disruptive and so are not part of the Cisco NX-OS software image. They are released with every Cisco NX-OS release but do not frequently contain changes. Refer to the specific Release Notes for any recommended fixes.
For more information on Transceiver Firmware, see the Cisco MDS 9000 Series Transceiver Firmware Release Notes, Release 9.4(2).
For more information on EPLD bundles, see the Cisco MDS 9000 Series EPLD Release Notes, Release 9.4(2).
Choosing Between Cisco MDS NX-OS Open Systems Releases
Cisco uses release numbering to indicate the maturity of a Cisco MDS NX-OS release train. Cisco MDS NX-OS major versions are incremented when significant software features or hardware support are added. Because of the focus on new features and hardware, all bugs may not yet have been fixed. After an initial release, minor version numbers of the release train are incremented as bugs are resolved, and minor feature enhancements and security patches are integrated. This provides increased stability to the new features and updated security.
For Cisco recommended MDS NX-OS releases for each type of hardware, see Recommended Releases for Cisco MDS 9000 Series Switches document.
Components Supported
For information on supported software and hardware components, see Cisco MDS 9000 Series Compatibility Matrix.
IBM FICON Qualification Status
Cisco MDS NX-OS Release 9.4(2) is not IBM FICON qualified. For more information on releases that are IBM FICON qualified, see Cisco MDS 9000 NX-OS and SAN-OS Software Release Notes.
Upgrade and Downgrade Paths
The following sections provides information about nondisruptive upgrade and downgrade paths for Cisco MDS NX-OS Release 9.4(2). For guidelines that are recommended for upgrading or downgrading Cisco MDS NX-OS software images, see the Cisco MDS 9000 NX-OS Software Upgrade and Downgrade Guide, Release 9.x.
Upgrading Cisco MDS NX-OS Software Image
Open Systems Nondisruptive Upgrade Paths
Nondisruptive Upgrade Paths to Cisco MDS NX-OS Release 9.4(2).
| Current MDS NX-OS Release |
Nondisruptive Upgrade Paths and Ordered Upgrade Steps |
| 9.4(x) |
Upgrade directly to MDS NX-OS Release 9.4(2) |
| 9.3(x) |
Upgrade directly to MDS NX-OS Release 9.4(2) |
| 9.2(x) |
Upgrade directly to MDS NX-OS Release 9.4(2) |
| 8.5(1) |
Upgrade directly to MDS NX-OS Release 9.4(2) |
| 8.4(2c), 8.4(2d), 8.4(2e), 8.4(2f) |
Upgrade directly to MDS NX-OS Release 9.4(2) |
| Any 8.x prior to 8.4(2c) |
Step 1. Upgrade to MDS NX-OS Release 8.4(2c). Step 2. Upgrade to MDS NX-OS Release 9.4(2) |
| 7.3(1)DY |
Step 1. Upgrade to MDS NX-OS Release 8.1(1b) Step 2. Upgrade to MDS NX-OS Release 8.4(2c) Step 3. .Upgrade to MDS NX-OS Release 9.4(2) |
| 6.2(29), 6.2(31), 6.2(33) |
Step 1. Upgrade to MDS NX-OS Release 8.4(2c) Step 2. Upgrade to MDS NX-OS Release 9.4(2) |
Note: Upgrading MDS NX-OS from unsupported releases to MDS NX-OS Release 9.4(2) is disruptive.
Downgrading Cisco MDS NX-OS Software Image
Open Systems Nondisruptive Downgrade Paths
Nondisruptive Downgrade Paths from NX-OS Release 9.4(2)
| Target MDS NX-OS Release |
Nondisruptive Downgrade Paths and Ordered Upgrade Steps |
| 9.4(x) |
Downgrade directly to the target release |
| 9.3(x) |
Downgrade directly to the target release |
| 9.2(x) |
Downgrade directly to the target release |
| 8.5(1) |
Downgrade directly to the target release |
| 8.4(2c), 8.4(2d), 8.4(2e), 8.4(2f) |
Downgrade directly to the target release |
| Any 8.x prior to 8.4(2c) |
Step 1. Downgrade to MDS NX-OS Release 8.4(2c) or 8.4(2d) or 8.4(2e) or 8.4(2f) Step 2. Downgrade to the target release |
| 7.3(1)DY |
Step 1. Downgrade to MDS NX-OS Release 8.4(2c) Step 2. Downgrade to MDS NX-OS Release 8.1(1b) Step 3. Downgrade to the target release |
| 6.2(29), 6.2(31), 6.2(33) |
Step 1. Downgrade to MDS NX-OS Release 8.4(2c) Step 2. Downgrade to the target release. |
Note: Downgrading the MDS NX-OS Release 9.4(2) to unsupported MDS NX-OS releases is disruptive.
New Hardware Features
| Product Impact |
Feature |
Description |
| Transceivers |
64 Gbps LW SFP |
Support for the DS-SFP-FC64G-LW transceiver has been introduced. See the Cisco MDS 9000 Series Pluggable Transceivers Data Sheet. |
New and Enhanced Software Features
| Product Impact |
Feature |
Description |
| Feature Set |
FCIP |
The minimum allowed limit of the TCP minimum retransmit timeout has been lowered from 200 ms to 50 ms. The TCP minimum retransmit time is configured with the fcp-min-retransmit-time command in FCIP profile configuration. See the Cisco MDS 9000 Series IP Services Configuration Guide. |
| SNMP |
Support for reading FC transceiver sensor descriptions and DOM parameters has been introduced. The descriptions are in the 'entPhysicalDescr' OID. See the Cisco MDS 9000 Series Interfaces Configuration Guide. |
|
| FDMI |
Support for virtual devices to allow management of virtual HBAs has been introduced. See the Cisco MDS 9000 Series Interfaces Configuration Guide. |
|
| SAN Analytics |
Support for SAN Analytics and SAN Telemetry Streaming on the Cisco MDS 9396V Fibre Channel switch has been introduced. See the Cisco MDS 9000 Series SAN Analytics and SAN Telemetry Streaming Configuration Guide. |
|
| Ease of use |
System |
Support for linecard configuration migration when upgrading linecards in the same slot has been added. The migrate configuration linecard exec command has been introduced. See the Cisco MDS 9000 Linecard Configuration on Migration and Replacement and CSCvm69632. |
| Power Efficiency |
System |
Support to control SFP power in interfaces that are shutdown has been introduced. The following commands have been introduced: Configuration mode: system transceiver power-control Exec mode: show system transceiver power-control Also the show interface command has been modified to display the power control setting and current power state. See the Cisco MDS 9000 Series Interfaces Configuration Guide, Release 9.x. |
| Security |
SSL |
Support for TLS version 1.3 on Cisco MDS 9700 Multilayer Directors has been introduced. See the Cisco MDS 9000 Series Programmability Guide. |
| SSH |
Support for flexible Ciphers and Algorithms in SSH on MDS 9148S 16G Multilayer Fabric Switch, MDS 9396S 16G Multilayer Fabric Switch and MDS 9250i Multiservice Fabric Switch has been introduced. See the Cisco MDS 9000 Series Security Configuration Guide, Release 9.x. |
Unsupported Features
MD5 Hash in FCSP
From Cisco MDS NX-OS Release 9.4(2), support for the MD5 hash algorithm in Fibre Channel Security Protocol (FSCP) has been removed as it is no longer considered secure. The default hash algorithm has been changed to SHA1.
10G and 40G FCoE linecards
From Cisco MDS NX-OS Release 9.4(2), the following FCoE linecards are no longer supported:
· DS-X9848-480K9 – 48-port 10-Gbps FCoE Switching Module
· DS-X9824-960K9 – MDS 9700 24-port 40-Gbps FCoE Switching Module
For more information, see Cisco MDS 9700 Series Multilayer Directors Hardware Installation Guide.
SDV feature
Cisco MDS NX-OS Release 9.3(2) and later releases do not support Cisco SAN device virtualization (SDV).
Traditional and Smart Licensing Version 1.0 Licenses
Cisco MDS NX-OS Release 9.2(2) and later releases does not support installation of Product Authorization Key (PAK) or Smart Licensing version 1.0 licenses. Licenses are now managed through Smart License using Policy (SLP).
For more information such as how to migrate licenses, see Smart Licensing Using Policy chapter in Cisco MDS 9000 Series Licensing Guide, Release 9.x.
Python 2
Support for Python 2 is deprecated from Cisco MDS NX-OS Release 9.2(2). Python 3 remains supported instead. Python 2 scripts should be checked for compatibility with Python 3 to ensure they continue to function as expected.
For more information, see the Python API chapter in the Cisco MDS 9000 Series Programmability Guide, Release 9.x.
Zoning Features
LUN zoning, read-only zones, and broadcast zones are no longer supported.
If these features are already configured, completely remove all the configurations that include these features before attempting to boot any module. In addition, you cannot configure these features after you bring up any module.
XRC Acceleration License
From Cisco MDS NX-OS Release 8.1(1a), the Cisco Extended Remote Copy (XRC) acceleration license is obsoleted on Cisco MDS 9000 Series Switches due to improvements in the mainframe XRC feature.
Virtual Router Redundancy Protocol (VRRP)
From Cisco MDS NX-OS Release 8.3(1) and later, the VRRP feature is not supported on Cisco MDS 9000 Series Switches.
Data Encryption Standard (DES) for SNMP
From Cisco MDS NX-OS Release 8.5(1), AES-128 is the default encryption mechanism for SNMPv3. DES encryption for SNMP is supported only for DES users who upgrade from previous releases to Cisco MDS NX-OS Release 8.5(1). Ensure that you delete all the SNMPv3 users configured with DES encryption before upgrading to Cisco MDS NX-OS Release 8.5(1) and later releases. Any downgrades from Cisco MDS NX- OS Release 8.5(1) will be restricted if any of the SNMPv3 users have DES encryption configured as the privacy protocol. All such users will either need to be deleted or reconfigured to use no privacy protocol or AES128 encryption before downgrading.
For more information, see Cisco MDS 9000 Series System Management Configuration Guide, Release 9.x.
Fabric Performance Impact Notifications (FPIN)
· FPIN is not supported on switches that are operating in NPV mode.
· FPIN notifications for oversubscription-based congestion are not supported.
FCWA, XRC, DMM, SME
FCWA, XRC, DMM, and SME features are not supported from Release 8.x.
SAN Extension Tuner
SAN Extension Tuner (SET) is not supported on Cisco MDS 9220i switches in Cisco MDS NX-OS Release 8.5(1) or later.
Fibre Channel Read Diagnostic Parameters
Fibre Channel RDP querying is not supported on NP, Port Channel, or FCoE links.
Slow Drain Detection and Congestion Isolation
ER_RDY is not supported on FC interfaces running at 10 Gbps.
FCIP Support
· In Cisco MDS NX-OS Release 9.2(2) or later releases, simultaneous use of IVR and FCIP Write Acceleration features is not supported on FCIP tunnels configured on Cisco MDS 9700 Director switches.
· On Cisco MDS 24/10 Port SAN Extension Module, configuring multiple FSPF equal cost paths (ECMP) port channels with FCIP members in the same VSAN is not a valid configuration. If this is configured, then the traffic flows through only one of the port channels.
iSCSI Support
iSCSI is not supported on Cisco MDS 9700 Directors with Cisco MDS 24/10 port SAN Extension Modules and Cisco MDS 9220i multiservice fabric switch.
Cisco TrustSec FC Link Encryption
Cisco TrustSec FC Link Encryption support is available only on certain ports for the following modules and switches:
| Model |
Description |
Cisco TrustSec Capable Ports |
Encryption Key Length |
| DS-X9748- 3072K9 |
64 Gbps Fibre Channel Switching module |
9, 11, 13, 15, 25, 27, 29, 31 |
AES 128 bit |
| DS-X9648- 1536K9 |
32 Gbps Fibre Channel Switching Module |
9-12, 25-28, 41-44 |
AES 128 bit |
| DS-X9448- 768K9 |
16 Gbps Fibre Channel Switching module |
All FC ports |
AES 128 bit |
| DS-X9334-K9 |
24/10 Port SAN Extension Module |
All FC ports |
AES 128 bit |
| DS-C9132T-K9 |
MDS 9132T Fabric Switch |
9-12, 25-28 |
AES 128 bit |
| DS-C9148T-K9 |
MDS 9148T Fabric Switch |
9-12, 25-28, 41-44 |
AES 128 bit |
| DS-C9396T-K9 |
MDS 9396T Fabric Switch |
Base ports: 9-12, 25-28, 41-44 LEM ports: 57-60, 73-76, 89-92 |
AES 128 bit |
| DS-C9220I-K9 |
MDS 9220i 32 Gbps 12-Port Fibre Channel Fabric Switch |
9-12 |
AES 128 bit |
| DS-C9124V- 24PEVK9 |
MDS 9124V 64 Gbps 24-Port Fibre Channel Fabric Switch |
9-12 |
AES 128 bit |
| DS-C9148V- 48PETK9 |
MDS 9148V 64 Gbps 48-Port Fibre Channel Fabric Switch |
9-12, 33-36 |
AES 128 bit |
| DS-C9396V-K9 |
64 Gbps 96 Port Fibre Channel switch |
1-4, 25-28, 57-60, 81-84 |
AES 128 bit |
Resolved Issues
Severity 1 (Catastrophic) Issues
| Bug ID |
Headline |
Known Impacted Releases |
| CSCwj30310 |
snmpd crashes with signal 11 if ssh key ecdsa is configured |
9.4(1a) ), 9.4(1) |
| A fabric switch with SFP checksum errors reloads after an ISSU |
9.4(1a), 9.4(1) 9.3(2a), 9.3(2), 9.3(1) 8.4(1), 8.4(2), 8.4(2a), 8.4(2b), 8.4(2c), 8.4(2d). 8.4(2e) 8.3(2), 8.3(1) 8.2(2), 8.2(1) 8.1(1) |
|
| Nginx process crash with core files on 9.3.2 |
9.3(2) |
|
| Sup-1 to Sup-4 migration detects problem with Sup-4 but does not abort migration and poweroff sup-4 |
8.5(1) |
|
| 'machine check' error triggers reload on MDS 9396S switch and warning on MDS 32 Gbps FC linecard |
9.4(1) 9.3(1) 9.2(1) 8.4(2d) |
Severity 2 (Severe) Issues
| Bug ID |
Headline |
Known Impacted Releases |
| Nginx process crash with core files on 9.3.2 |
9.3(2) |
|
| Internal buffers leaked by TACACS service even though TACACS service is not enabled |
9.4(1) 9.3(2a) |
Severity 3 (Moderate) Issues
| Bug ID |
Headline |
Known Impacted Releases |
| pmon service crashes while running 'show tech' commands |
9.4(1a) |
|
| Interfaces stuck in offline status after DellEMC Unity, NetApp, HPE Synergy VC upgrade or reboot |
9.4(1a), 9.4(1) 9.3(2a), 9.3(2), 9.3(1) |
|
| Strings "prohibit" or "block" are falsely interpret as FICON config when performing ISSU |
9.4(1a) |
|
| Sup-1 to Sup-4 migration detects problem with Sup-4 but does not abort migration and poweroff sup-4 |
8.5(1) |
|
| Fabric switch or MDS 9700 Supervisor Module-3 resets randomly with reason 'watchdog timeout' |
9.3(2a), 9.3(1) 9.2(1) 8.5(1) 8.4(1), 8.3(1) 8.2(1) 8.1(1) |
Open Issues
Severity 2 (Severe) Issues
| Bug ID |
Headline |
Known Impacted Releases |
| MDS 9700 control plane packet drops after switch boot |
9.4(1a) 8.4(1) |
|
| Kernel panic on MDS DS-X97-SF4-K9 model supervisor |
9.4(1a) 8.4(2a), 8.4(1a), 8.4(1) |
|
| CSCwi81679 |
analytics_client service crash after enabling or disabling monitoring multiple times |
9.4(2), 9.4(1a), 9.4(1) 9.3(2a), 9.3(2), 9.3(1) |
Severity 3 (Moderate) Issues
| Bug ID |
Headline |
Known Impacted Releases |
| CSCwi20078 |
Frame forwarding consistency checker fails after ISSU |
9.4(2), 9.4(1a), 9.4(1) 9.3(2a), 9.3(2), 9.3(1) |
| Online 64 Gbps ports go down and reinitialise when OLS primative is received |
9.4(2), 9.4(1a), 9.4(1) 9.3(2a), 9.3(2), 9.3(1) |
|
| FCSP service crash after reload or enabling the FCSP feature |
9.4(2), 9.4(1a), 9.4(1) 9.3(2a), 9.3(2), 9.3(1) |
Severity 4 (Minor) Issues
| Bug ID |
Headline |
Known Impacted Releases |
| 'show tech details' triggers 'pam_ftp(ftp:auth): conversation failed- ftpd' syslogs |
9.4(2), 9.4(1a) 8.5(1) 8.4(1), 8.4(2), 8.4(2a), 8.4(2b), 8.4(2c), 8.4(2d). 8.4(2e) 8.3(2), 8.3(1) 8.2(2), 8.2(1) |
|
| Scheduler job 'XbarErrorMonitor_Job' fails to run |
9.4(2), 9.4(1a), 9.4(1) 9.3(2a), 9.3(2), 9.3(1) 8.5(1) 8.4(1), 8.4(2), 8.4(2a), 8.4(2b), 8.4(2c), 8.4(2d), 8.4(2e) 8.3(2), 8.3(1) |
|
| IPv6 source address not displayed in log in failure logs |
9.4(2), 9.4(1a) 8.5(1) 8.4(1), 8.4(2), 8.4(2a), 8.4(2b), 8.4(2c), 8.4(2d), 8.4(2e) 8.3(2), 8.3(1) |
|
| SCSI target discovery service running even after removal of last DS-X9334-K9 module from switch |
9.4(2), 9.4(1a) 8.5(1) 8.4(1), 8.4(1a), 8.4(2), 8.4(2a), 8.4(2b), 8.4(2c), 8.4(2d), 8.4(2e) 8.3(1), 8.3(2) 8.2(1), 8.2(2) 8.1(1), 8.1(1a), 8.1(1b) |
|
| Nondisruptive reload causes reinitialization of error disabled ports on other linecards |
9.4(2), 9.4(1a) 8.5(1) 8.4(2), 8.4(2a), 8.4(2b), 8.4(2c), 8.4(2d), 8.4(2e) |
|
| Remove misleading ficon stat 'merge failed' message in non- FICON VSAN |
9.4(2), 9.4(1a) 8.5(1) 8.4(2b), 8.4(2c), 8.4(2d), 8.4(2e) |
|
| Linecard fails to boot up with '%PORT-5- MODULE_BRINGUP_NOT_ALLOWED' error |
9.4(2), 9.4(1a) 8.4(2e), 8.4(2c) 8.1(1) |
Severity 6 (Enhancement) Issues
| Bug ID |
Headline |
Known Impacted Releases |
| All flows are briefly suspended while moving an IOA flow between 2 clusters |
9.4(2), 9.4(1a) 8.5(1) 8.4(1), 8.4(2), 8.4(2a), 8.4(2b), 8.4(2c), 8.4(2d), 8.4(2e) 8.3(2), 8.3(1) 8.2(2), 8.2(1) 8.1(1b), 8.1(1a), 8.1(1) |
|
| Streaming to telemetry receiver stops, receiver stays in "idle" state |
9.4(2), 9.4(1a) 8.5(1) 8.4(1), 8.4(2), 8.4(2a), 8.4(2b), 8.4(2c), 8.4(2d), 8.4(2e) |
|
| Need to automatically sync bootflash:/scripts directory between active and standby sups |
9.4(2), 9.4(1a), 9.4(1) 8.1(1a) |
|
| Need to save nonvolatile logs about BIOS programming errors |
9.4(2), 9.4(1a) 8.5(1) 8.4(2c), 8.4(2d), 8.4(2e) 8.3(2) |
|
| A fabric module with a faulty link to a linecard is not powered down |
9.4(2), 9.4(1a) 8.4(1) |
|
| Add option to 'show tech-support' to exclude and include subcommands |
9.4(2), 9.4(1a), 9.4(1) 8.1(1) |
|
| Span tx is not working in NPV mode on all platforms, rx is working |
9.4(2), 9.4(1a), 9.4(1) |
|
| Need a syslog warning when number of zone members exceeds maximum supported |
9.4(2), 9.4(1a) 8.4(2d) |
Related Documentation
The documentation set for the Cisco MDS 9000 Series includes the documents that are listed in this section. To find a document online, access the following URL:
http://www.cisco.com/en/US/products/ps5989/tsd_products_support_series_home.html
Cisco Nexus Dashboard Fabric Controller (Formerly DCNM)
http://www.cisco.com/en/US/products/ps9369/tsd_products_support_series_home.html
Release Notes
Licensing Information
Regulatory Compliance and Safety Information
http://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/hw/regulatory/compliance/RCSI.html
Compatibility Information
Installation and Upgrade
Configuration Guides
CLI
Troubleshooting and Reference
Statement of Volatility
Documentation Roadmap
https://www.cisco.com/c/en/us/td/docs/storage/san_switches/mds9000/roadmaps/rel90.html
Documentation Feedback
To provide technical feedback on this document, or to report an error or omission, send your comments to mds-docfeedback@cisco.com. We appreciate your feedback.
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