Cisco Nexus 3600 NX-OS Release Notes, Release 9.2(1)

Table 1 shows the online change history for this document.

Table 1. Online History Change

 

 

Contents

Introduction   3

Licensing Information   3

System Requirements  3

New and Changed Information   4

Resolved Caveats—Cisco NX-OS Release 9.2(1)  5

Behavior Changes  7

Limitations  7

Upgrade Paths to Release 9.2(1)  8

Related Documentation   8

Obtaining Documentation and Submitting a Service Request  8

 

Introduction

Cisco NX-OS software is a data center-class operating system designed for performance, resiliency, scalability, manageability, and programmability at its foundation. The Cisco NX-OS software provides a robust and comprehensive feature set that meets the requirements of virtualization and automation in mission-critical data center environments. The modular design of the Cisco NX-OS operating system makes zero-impact operations a reality and enables exceptional operational flexibility.

The Cisco Nexus 3000 Series switches, which includes Cisco Nexus 3100, 3200, 3400, 3500, and 3600 platform switches, and Cisco Nexus 9300 and 9500 platform switches run on the same binary image, also called the “unified” image.

Cisco NX-OS Release 9.2(1) is the first release that adopts unified version numbering. As more platforms have been added, there is no need to have a “platform” designator as used in the past.

An example of a previous release number is: 7.0(3)I7(4). In this format, the ‘I’ is the platform designator.

Moving forward for the previously identified platforms, we will be adopting the simplified 3-letter versioning scheme. For example, (unified-release-major.major/minor..maintenance).

Note: In order to accommodate upgrade compatibility from an older software version that is expecting a platform designator, when the install all command is entered or the show install all impact command is entered, the version string appears as 9.2(1)I9(1). The “I9(1)” portion of the string can be safely ignored. It will later appear as 9.2(1).

Licensing Information

Temporary licenses with an expiry date are available for evaluation and lab use purposes. They are strictly not allowed to be used in production. Please use a permanent or subscription license that has been purchased through Cisco for production purposes.

For more information, see the Cisco NX-OS Licensing Guide.

System Requirements

This section includes the following sections:

■        Supported Device Hardware

■        Supported Optics

Supported Device Hardware

Table 2 lists the Cisco Nexus 3600 switch hardware that Cisco NX-OS Release 9.2(1) supports. For additional information about the supported hardware, see the Cisco Nexus 3600 NX-OS Mode Switch Hardware Installation Guide.

Table 2. Cisco Nexus 3600 Switch Hardware

Supported Optics

See the Cisco Transceiver Modules Compatibility Information for a list of supported optical components.

 

New and Changed Information

This section lists the following topic:

■        New Hardware Features in Cisco NX-OS Release 9.2(1)

■        New Software Features in Cisco NX-OS Release 9.2(1)

New Hardware Features in Cisco NX-OS Release 9.2(1)

Cisco NX-OS Release 9.2(1) supports the following new hardware:

■        There are no new hardware features in Cisco NX-OS Release 9.2(1).

New Software Features in Cisco NX-OS Release 9.2(1)

Cisco NX-OS Release 9.2(1) includes the following new software features:

Fundamentals Features

■        show time-stamp running-config last-changed command—Displays the timestamp when the running configuration was last changed.

For more information, see the Cisco Nexus 3600 NX-OS Fundamentals Configuration Guide, Release 9.2(x).

Multicast Features

■        Multicast VLAN Registration (MVR) updates—Enabling or disabling IGMP snooping on both vPC peers also enables the forwarding of IGMP queries from different MVR source VLANs into the same MVR receiver VLAN. The resulting IGMP queries may send out queries with different versions and query interval. For maintaining the behavior prior to Cisco NX-OS Release 7.0(3)I3(1), use the mvr suppress-query vlan command.

For more information, see the Cisco Nexus 3600 NX-OS Multicast Configuration Guide, Release 9.2(x).

 

Security Features

■        No Service Password-Recovery—Added the No Service Password-Recovery feature which disables the password recovery mechanism.

For more information, see the Cisco Nexus 3600 NX-OS Security Configuration Guide, Release 9.2(x).

 

System Management Features

■        PTP offload support added on the Cisco Nexus 96180C-R switch.

For more information, see the Cisco Nexus 3600 NX-OS System Management Configuration Guide, Release 9.2(x).

 

Upgrade and Downgrade Features

■        Optionality—Support added for modular package management. Cisco NX-OS software now provides the flexibility to add, remove, and upgrade the features selectively without changing the base NX-OS software.

For more information, see the Cisco Nexus 3600 NX-OS Upgrade and Downgrade Guide, Release 9.2(x).

 

VXLAN Features

■        VXLAN CLI Simplification—Support added for the reduction of CLI commands.

For more information, see the Cisco Nexus 3600 NX-OS VXLAN Configuration Guide, Release 9.2(x).

Resolved Caveats—Cisco NX-OS Release 9.2(1)

The following table lists the resolved bugs in Cisco NX-OS Release 9.2(1). You can use the bug ID to access the Cisco Bug Search Tool  and see additional information about the bug.

Open Caveats—Cisco NX-OS Release 9.2(1)

The following table lists the open caveats in Cisco NX-OS Release 9.2(1). Click the bug ID to access the Cisco Bug Search Tool and see additional information about the bug.

 

 

Behavior Changes

This section lists limitations related to Cisco NX-OS Release 9.2(1).

Interface Behavior Changes

■        Output format for the exec command CLI show vpc orphan-ports has changed from 7.0(3)F3(4) release to 9.2(1) release.

Programmability Behavior Changes

■        Release 9.2(1) brings in the new kernel and the new processes.

■        Interface counter statistics are grouped together in the XML/JSON output. The output for the show interface counters command in JSON format has changed.

■        NX-API does not support insecure HTTP by default.

■        NX-API does not support weak TLSv1 protocol by default.

Security Behavior Changes

■        Stronger ciphers are used in Release 9.2(1).

■        A new command, no service password-recovery is now supported.

■        Only one version out of v4 and v6 versions of the uRPF command can be configured on an interface. If one version is configured, all the mode changes must be done by the same version and another version is blocked on that interface.

Limitations

This section lists limitations related to Cisco NX-OS Release 9.2(1).

■        IPv4 traffic might drop when only IPv6 uRPF is enabled on the interface. For more information, see CSCvh99632.

■        The PTP process restart and system switchover accumulates high corrections for a few seconds. For more information, see CSCvg49023.

■        The LDP neighbor might flap on switchover in a scaled setup with many interfaces. Increase the discovery hello hold time for MPLS under the MPLS LDP configuration. For more information, see CSCvg71349.

■        CoPP (Control Plane Policing) cannot be disabled. If you attempt to disable it, an error message appears.  For more information, see CSCvi09329.

■        The skip CoPP policy option has been removed from the Cisco NX-OS initial setup utility because using it can impact the control plane of the network. For more information, see CSCvc44819.

■        On Cisco Nexus N3K-C3636C-R and N3K-C36180YC-R switches, auto-negotiation may not work when bringing up 100G links using QSFP-100G-CR4 cable. To work around this issue, you must hard-code the speed on all ports of the Cisco Nexus N3K-C3636C-R, on ports 49-64 of the Cisco Nexus N3K-C36180YC-R and disable auto-negotiation. For more information, see CSCvi82402.

Upgrade Paths to Release 9.2(1)

See the following upgrade paths for upgrading from an earlier release to Release 9.2(1):

■        Release 7.0(3)F3(3) -> Release 7.0(3)F3(4) -> Release 9.2(1)

■        Release 7.0(3)F3(3c) -> Release 9.2(1)

■        Release 7.0(3)F3(4) -> Release 9.2(1)

Note: An upgrade from a release prior to 7.0(3)F3(3) to Release 9.2(1) is not supported. You must upgrade to either Release 7.0(3)F3(3), 7.0(3)F3(3c), or 7.0(3)F3(4) and then upgrade to Release 9.2(1).

Related Documentation

The entire Cisco Nexus 3600 NX-OS documentation set is available at the following URL:

https://www.cisco.com/c/en/us/support/switches/nexus-3000-series-switches/tsd-products-support-series-home.html

The Cisco Nexus 3600 NX-OS Hardware Installation Guide is available at the following URL: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus3600/hw/installation/guide/b_n3600_hardware_install_guide.html

The Cisco Nexus 3600 NX-OS Verified Scalability Guide is available at the following URL:

 

https://www.cisco.com/c/en/us/support/switches/nexus-3000-series-switches/products-installation-and-configuration-guides-list.html

Documentation Feedback

To provide technical feedback on this document, or to report an error or omission, please send your comments to nexus3k-docfeedback@cisco.com. We appreciate your feedback.

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation 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:

http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html

Open a service request online at:

https://tools.cisco.com/ServiceRequestTool/create/launch.do

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 product includes cryptographic software written by Eric Young (eay@cryptsoft.com). This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit. (http://www.openssl.org/). This product includes software written by Tim Hudson (tjh@cryptsoft.com).

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Cisco Nexus 3600 Series NX-OS Release Notes, Release 9.2(1)

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