First Published: November 30, 2020

Release Notes for Cisco Catalyst 9600 Series Switches, Cisco IOS XE Bengaluru 17.4.x

Introduction

Cisco Catalyst 9600 Series Switches are the next generation purpose-built 40 GigabitEthernet, 50 GigabitEthernet, 100 GigabitEthernet, and 400 GigabitEthernet modular core and aggregation platform providing resiliency at scale with the industry’s most comprehensive security while allowing your business to grow at the lowest total operational cost. They have been purpose-built to address emerging trends of Security, IoT, Mobility, and Cloud.

They deliver hardware and software convergence in terms of ASIC architecture with Unified Access Data Plane (UADP) 3.0 and Cisco Silicon One Q200. The platform runs an Open Cisco IOS XE that supports model driven programmability, Serial Advanced Technology Attachment (SATA) Solid State Drive (SSD) local storage, and a higher memory footprint). The series forms the foundational building block for SD-Access, which is Cisco’s lead enterprise architecture.

It also supports features that provide high availability, advanced routing and infrastructure services, security capabilities, and application visibility and control.

Whats New in Cisco IOS XE Bengaluru 17.4.1

Hardware Features in Cisco IOS XE Bengaluru 17.4.1

Feature Name

Description and Documentation Link

Cisco 10GBASE SFP+ modules

Supported transceiver module product numbers:

  • SFP-10G-T-X

  • SFP-10G-LRM

For information about the module, see Cisco 10GBASE SFP+ Modules Data Sheet. For information about device compatibility, see the Transceiver Module Group (TMG) Compatibility Matrix.

Cisco 100GBASE QSFP-100G Modules

Supported transceiver module product numbers:

  • QSFP-100G-LR-S

  • QSFP-100G-FR-S

For information about the module, see Cisco 100GBASE QSFP-100G Modules Data Sheet. For information about device compatibility, see the Transceiver Module Group (TMG) Compatibility Matrix.

Cisco QSFP-100G to four SFP-25G Copper Direct-Attach Breakout cables

Supported direct-attach breakout cable product numbers:

  • QSFP-4SFP25G-CU1M

  • QSFP-4SFP25G-CU2M

  • QSFP-4SFP25G-CU3M

  • QSFP-4SFP25G-CU5M

For information about these cables, see the Cisco 100GBASE QSFP-100G Modules Data Sheet. For information about device compatibility, see the Transceiver Module Group (TMG) Compatibility Matrix

Cisco SFP Modules for Gigabit Ethernet

Supported Cisco SFP Modules product numbers:

  • GLC-GE-100FX

  • GLC-T (10/100 Mbps)

  • GLC-TE (10/100 Mbps)

Note

 

GLC-T and GLC-TE operating at 10/100Mbps speed are not supported with Cisco QSA Module (CVR-QSFP-SFP10G).

For information about these cables, see the Cisco SFP Modules for Gigabit Ethernet Applications Data Sheet. For information about device compatibility, see the Transceiver Module Group (TMG) Compatibility Matrix

Software Features in Cisco IOS XE Bengaluru 17.4.1

Feature Name

Description, Documentation Link, and License Level Information

BGP Large Community

Introduces support for BGP large communities attribute which provides the capability for tagging routes and modifying BGP routing policy on devices. They are similar to BGP communities attributes, but with a twelve octet size.

See IP Routing → Configuring BGP Large Community

(Network Advantage)

Customizable Switching Database Manager (SDM) Templates for ACL Features

Allows you to configure a customizable SDM template for ACL features. In the customized template, you can assign resources to different ACL features based on your requirement.

See System Management →Customizable SDM Templates for ACL Features

(Network Advantage)

Line Configuration for Disabling Auto-Consolidation

Introduces support for the no line auto-consolidation command in line configuration mode. This command disables the auto consolidation of line commands during the nonvolatile generation (NVGEN) process.

See System Management →Line Auto Consolidation

(Network Advantage)

VRF-Aware RADIUS Automated Tester

Allows you to configure RADIUS automated tester for a non-default VRF. With this, the automated tester can access information about VRF and source-interface from the global source-interface and avoids marking the server as DEAD.

See Security →VRF Aware Radius Automated Testing

(Network Advantage)

Programmability

  • YANG Data Models

The following programmability features are introduced in this release:

  • YANG Data Models: For the list of Cisco IOS XE YANG models available with this release, navigate to: https://github.com/YangModels/yang/tree/master/vendor/cisco/xe/1741.

    Revision statements embedded in the YANG files indicate if there has been a model revision. The README.md file in the same GitHub location highlights changes that have been made in the release.

(Network Essentials and Network Advantage)

RadSec over TLS and DTLS

RadSec over Transport Layer Security (TLS) and Datagram Transport Layer Security (DTLS) is now supported on both client and device servers.

(Network Advantage)

Increased Support for Etherchannels

Introduces support for a maximum of 192 EtherChannels. Port channels 127 and 128 are reserved for StackWise Virtual mode, by default.

See Layer 2 → Configuring EtherChannels.

New on the Web UI

  • Smart Licensing Using Policy

  • Stealthwatch Cloud support for NetFlow monitoring

Use the WebUI for:

  • Smart Licensing Using Policy—Any new licenses that you purchase are added to a Cisco Smart Account. Smart licenses are no longer device-specific, but organization-specific. You can create separate Virtual Accounts for different departments in your organization and assign licenses to them from the centralized pool, thereby improving license portability and efficient consumption.

    Different Virtual Accounts can be assigned licenses that can be used to register product instances using a registration token. When a device is no longer in use by a department, the license can be provisioned to another department or pooled back to the Smart Account. Also, you can choose the deployment option, based on your security profile, such as direct, on-premise, and offline.

  • Stealthwatch Cloud support for NetFlow monitoring—Allows you to monitor packets to detect threats and security vulnerabilities in your public cloud network powered by Cisco Stealthwatch Cloud.

Serviceability

show etherchannel

The command was modified. The platform keyword was introduced. It displays summary of channel-group for the specified platform.

Important Notes

Unsupported Features

  • Cisco Application Visibility and Control (AVC)

  • IPsec VPN

  • Network-Based Application Recognition (NBAR) and Next Generation NBAR (NBAR2)

  • Resilient Ethernet Protocol (REP) (REP is not supported only in this release. See CSCvv91619 and CSCvw17155).

Complete List of Supported Features

For the complete list of features supported on a platform, see the Cisco Feature Navigator at https://cfnng.cisco.com.

Accessing Hidden Commands

This section provides information about hidden commands in Cisco IOS XE and the security measures that are in place, when they are accessed. These commands are only meant to assist Cisco TAC in advanced troubleshooting and are not documented.

Hidden commands are available under:

  • Category 1—Hidden commands in privileged or User EXEC mode. Begin by entering the service internal command to access these commands.

  • Category 2—Hidden commands in one of the configuration modes (global, interface and so on). These commands do not require the service internal command.

Further, the following applies to hidden commands under Category 1 and 2:

  • The commands have CLI help. Enter enter a question mark (?) at the system prompt to display the list of available commands.

    Note: For Category 1, enter the service internal command before you enter the question mark; you do not have to do this for Category 2.

  • The system generates a %PARSER-5-HIDDEN syslog message when a hidden command is used. For example: 
    *Feb 14 10:44:37.917: %PARSER-5-HIDDEN: Warning!!! 'show processes memory old-header ' is a hidden command. 
Use of this command is not recommended/supported and will be removed in future.

Apart from category 1 and 2, there remain internal commands displayed on the CLI, for which the system does NOT generate the %PARSER-5-HIDDEN syslog message.


Important

We recommend that you use any hidden command only under TAC supervision.

If you find that you are using a hidden command, open a TAC case for help with finding another way of collecting the same information as the hidden command (for a hidden EXEC mode command), or to configure the same functionality (for a hidden configuration mode command) using non-hidden commands.

Default Behaviour

Beginning from Cisco IOS XE Gibraltar 16.12.5 and later, do not fragment bit (DF bit) in the IP packet is always set to 0 for all outgoing RADIUS packets (packets that originate from the device towards the RADIUS server).

Supported Hardware

Cisco Catalyst 9600 Series Switches—Model Numbers

The following table lists the supported switch models. For information about the available license levels, see section License Levels.

Switch Model

(append with “=” for spares)

Description

C9606R

Cisco Catalyst 9606R Switch

  • Redundant supervisor module capability

  • Four linecard slots

  • Hot-swappable fan tray, front and rear serviceable, fan tray assembly with 9 fans.

  • Four power supply module slots

Supported Hardware on Cisco Catalyst 9600 Series Switches

Product ID

(append with “=” for spares)

Description

Supervisor Modules

C9600-SUP-1

Cisco Catalyst 9600 Series Supervisor 1 Module

This supervisor module is supported on the C9606R chassis.

SATA1 SSD2 Modules (for the Supervisor)

C9K-F2-SSD-240GB

Cisco Catalyst 9600 Series 240GB SSD Storage

C9K-F2-SSD-480GB

Cisco Catalyst 9600 Series 480GB SSD Storage

C9K-F2-SSD-960GB

Cisco Catalyst 9600 Series 960GB SSD Storage

Line Cards

C9600-LC-48YL

Cisco Catalyst 9600 Series 48-Port SFP56 line card.

  • C9600X-SUP-2

    • 48 SFP56 ports of 50G/25G/10G

  • C9600X-SUP-1

    • 48 SFP28 ports of 25G/10G/1G

C9600-LC-24C

Cisco Catalyst 9600 Series 24-Port 40G/12-Port 100G line card.

  • C9600X-SUP-2

    • 24 QSFP28 ports of 100G/40G

  • C9600-SUP-1

    • 12 ports of 100G or 24 ports of 40G

C9600-LC-48TX

Cisco Catalyst 9600 Series 48-Port MultiGigabit RJ45 line card.

  • C9600X-SUP-2

    • 48 ports of 10G/5G/2.5G

  • C9600X-SUP-1

    • 48 ports of 10G/5G/2.5G/1G and 100M/10M

C9600-LC-48S

Cisco Catalyst 9600 Series 48-Port SFP line card.

  • C9600X-SUP-2

    • Not supported

  • C9600-SUP-1

    • 48 SFP ports of 1G

AC Power Supply Modules

C9600-PWR-2KWAC

Cisco Catalyst 9600 Series 2000W AC Power Supply Module3

DC Power Supply Modules

C9600-PWR-2KWDC

Cisco Catalyst 9600 Series 2000W DC Power Supply Module
1 Serial Advanced Technology Attachment (SATA)
2 Solid State Drive (SSD) Module
3 Power supply output capacity is 1050W at 110 VAC.

Compatibility Matrix

The following table provides software compatibility information between Cisco Catalyst 9600 Series Switches, Cisco Identity Services Engine, Cisco Access Control Server, and Cisco Prime Infrastructure.

Catalyst 9600

Cisco Identity Services Engine

Cisco Access Control Server

Cisco Prime Infrastructure

Bengaluru 17.4.1

3.0

2.7 Patch 2

-

PI 3.9 + PI 3.9 latest maintenance release + PI 3.9 latest device pack

See Cisco Prime Infrastructure 3.9 → Downloads.

Amsterdam 17.3.8a

2.7

-

PI 3.10 + PI 3.10 latest maintenance release + PI 3.10 latest device pack

See Cisco Prime Infrastructure 3.10 → Downloads.

Amsterdam 17.3.8

2.7

-

PI 3.10 + PI 3.10 latest maintenance release + PI 3.10 latest device pack

See Cisco Prime Infrastructure 3.10 → Downloads.

Amsterdam 17.3.7

2.7

-

PI 3.10 + PI 3.10 latest maintenance release + PI 3.10 latest device pack

See Cisco Prime Infrastructure 3.10 → Downloads.

Amsterdam 17.3.6

2.7

-

PI 3.10 + PI 3.10 latest maintenance release + PI 3.10 latest device pack

See Cisco Prime Infrastructure 3.10 → Downloads.

Amsterdam 17.3.5

2.7

-

PI 3.9 + PI 3.9 latest maintenance release + PI 3.9 latest device pack

See Cisco Prime Infrastructure 3.9 → Downloads.

Amsterdam 17.3.4

2.7

-

PI 3.9 + PI 3.9 latest maintenance release + PI 3.9 latest device pack

See Cisco Prime Infrastructure 3.9 → Downloads.

Amsterdam 17.3.3

2.7

-

PI 3.9 + PI 3.9 latest maintenance release + PI 3.9 latest device pack

See Cisco Prime Infrastructure 3.9 → Downloads.

Amsterdam 17.3.2a

2.7

-

PI 3.8 + PI 3.8 latest maintenance release + PI 3.8 latest device pack

See Cisco Prime Infrastructure 3.8 → Downloads.

Amsterdam 17.3.1

2.7

-

PI 3.8 + PI 3.8 latest maintenance release + PI 3.8 latest device pack

See Cisco Prime Infrastructure 3.8 → Downloads.

Amsterdam 17.2.1

2.7

-

PI 3.7 + PI 3.7 latest maintenance release + PI 3.7 latest device pack

See Cisco Prime Infrastructure 3.7 → Downloads.

Amsterdam 17.1.1

2.7

-

-

Gibraltar 16.12.8

2.6

-

-

Gibraltar 16.12.7

2.6

-

-

Gibraltar 16.12.6

2.6

-

-

Gibraltar 16.12.5b

2.6

-

-

Gibraltar 16.12.5

2.6

-

-

Gibraltar 16.12.4

2.6

-

-

Gibraltar 16.12.3a

2.6

-

-

Gibraltar 16.12.3

2.6

-

-

Gibraltar 16.12.2

2.6

-

-

Gibraltar 16.12.1

2.6

-

-

Gibraltar 16.11.1

2.6

2.4 Patch 5

5.4

5.5

-

Web UI System Requirements

The following subsections list the hardware and software required to access the Web UI:

Minimum Hardware Requirements

Processor Speed

DRAM

Number of Colors

Resolution

Font Size

233 MHz minimum4

512 MB5

256

1280 x 800 or higher

Small
4 We recommend 1 GHz
5 We recommend 1 GB DRAM

Software Requirements

Operating Systems

  • Windows 10 or later

  • Mac OS X 10.9.5 or later

Browsers

  • Google Chrome—Version 59 or later (On Windows and Mac)

  • Microsoft Edge

  • Mozilla Firefox—Version 54 or later (On Windows and Mac)

  • Safari—Version 10 or later (On Mac)

ROMMON Versions

ROMMON, also known as the boot loader, is firmware that runs when the device is powered up or reset. It initializes the processor hardware and boots the operating system software (Cisco IOS XE software image). The ROMMON is stored on the following Serial Peripheral Interface (SPI) flash devices on your switch:

  • Primary: The ROMMON stored here is the one the system boots every time the device is powered-on or reset.

  • Golden: The ROMMON stored here is a backup copy. If the one in the primary is corrupted, the system automatically boots the ROMMON in the golden SPI flash device.

ROMMON upgrades may be required to resolve firmware defects, or to support new features, but there may not be new versions with every release.

The following table provides ROMMON version information for the Cisco Catalyst 9600 Series Supervisor Modules. For ROMMON version information of Cisco IOS XE 16.x.x releases, refer to the corresponding Cisco IOS XE 16.x.x release notes of the respective platform.

Release

ROMMON Version (C9600-SUP-1)

ROMMON Version (C9600X-SUP-2)

Bengaluru 17.4.1

17.3.1r[FC2]

-

Amsterdam 17.3.8a

17.3.1r[FC2]

-

Amsterdam 17.3.8

17.3.1r[FC2]

-

Amsterdam 17.3.7

17.3.1r[FC2]

-

Amsterdam 17.3.6

17.3.1r[FC2]

-

Amsterdam 17.3.5

17.3.1r[FC2]

-

Amsterdam 17.3.4

17.3.1r[FC2]

-

Amsterdam 17.3.3

17.3.1r[FC2]

-

Amsterdam 17.3.2a

17.3.1r[FC2]

-

Amsterdam 17.3.1

17.3.1r[FC2]

-

Amsterdam 17.2.1

17.1.1[FC2]

-

Amsterdam 17.1.1

17.1.1[FC1]

-

Upgrading the Switch Software

This section covers the various aspects of upgrading or downgrading the device software.


Note
You cannot use the Web UI to install, upgrade, or downgrade device software.

Finding the Software Version

The package files for the Cisco IOS XE software are stored on the system board flash device (flash:).

You can use the show version privileged EXEC command to see the software version that is running on your switch.


Note
Although the show version output always shows the software image running on the switch, the model name shown at the end of this display is the factory configuration and does not change if you upgrade the software license.

You can also use the dir filesystem: privileged EXEC command to see the directory names of other software images that you might have stored in flash memory.

Software Images

Release

Image Type

File Name

Cisco IOS XE Bengaluru 17.4.1

CAT9K_IOSXE

cat9k_iosxe.17.04.01.SPA.bin

No Payload Encryption (NPE)

cat9k_iosxe_npe.17.04.01.SPA.bin

Upgrading the ROMMON

To know the ROMMON or bootloader version that applies to every major and maintenance release, see ROMMON Versions.

You can upgrade the ROMMON before, or, after upgrading the software version. If a new ROMMON version is available for the software version you are upgrading to, proceed as follows:

  • Upgrading the ROMMON in the primary SPI flash device

    This ROMMON is upgraded automatically. When you upgrade from an existing release on your switch to a later or newer release for the first time, and there is a new ROMMON version in the new release, the system automatically upgrades the ROMMON in the primary SPI flash device, based on the hardware version of the switch when you boot up your switch with the new image for the first time.

  • Upgrading the ROMMON in the golden SPI flash device

    You must manually upgrade this ROMMON. Enter the upgrade rom-monitor capsule golden switch command in privileged EXEC mode.


    Note

    • In case of a Cisco StackWise Virtual setup, upgrade the active and standby supervisor modules.

    • In case of a High Availability set up, upgrade the active and standby supervisor modules.

After the ROMMON is upgraded, it will take effect on the next reload. If you go back to an older release after this, the ROMMON is not downgraded. The updated ROMMON supports all previous releases.

Software Installation Commands

Summary of Software Installation Commands

To install and activate the specified file, and to commit changes to be persistent across reloads:

install add file filename [ activate commit]

To separately install, activate, commit, cancel, or remove the installation file: install ?

add file tftp: filename

Copies the install file package from a remote location to the device and performs a compatibility check for the platform and image versions.

activate [ auto-abort-timer]

Activates the file, and reloads the device. The auto-abort-timer keyword automatically rolls back image activation.

commit

Makes changes persistent over reloads.

rollback to committed

Rolls back the update to the last committed version.

abort

Cancels file activation, and rolls back to the version that was running before the current installation procedure started.

remove

Deletes all unused and inactive software installation files.

Upgrading in Install Mode

Follow these instructions to upgrade from one release to another, using install commands, in install mode. To perform a software image upgrade, you must be booted into IOS through boot flash:packages.conf .

Before you begin


Caution

You must comply with these cautionary guidelines during an upgrade:

  • Do not power cycle the switch.

  • Do not disconnect power or remove the supervisor module.

  • Do not perform an online insertion and replacement (OIR) of either supervisor (in a High Availability setup), if one of the supervisor modules in the chassis is in the process of a bootloader upgrade or when the switch is booting up.

  • Do not perform an OIR of a switching module (linecard) when the switch is booting up.

Note that you can use this procedure for the following upgrade scenarios:

When upgrading from ...

To...

Cisco IOS XE Amsterdam 17.3.x or earlier releases

Cisco IOS XE Bengaluru 17.4.x

The sample output in this section displays upgrade from Cisco IOS XE Amsterdam 17.3.1 to Cisco IOS XE Bengaluru 17.4.1 using install commands.

Procedure

Step 1

Clean-up

install remove inactive

Use this command to clean-up old installation files in case of insufficient space and to ensure that you have at least 1GB of space in flash, to expand a new image.

The following sample output displays the cleaning up of unused files, by using the install remove inactive command:
Switch# install remove inactive
install_remove: START Fri Nov 13 19:51:48 UTC 2020
Cleaning up unnecessary package files
Scanning boot directory for packages ... done.
Preparing packages list to delete ...
    cat9k-cc_srdriver.17.03.01.SPA.pkg
      File is in use, will not delete.
    cat9k-espbase.17.03.01.SPA.pkg
      File is in use, will not delete.
    cat9k-guestshell.17.03.01.SPA.pkg
      File is in use, will not delete.
    cat9k-rpbase.17.03.01.SPA.pkg
      File is in use, will not delete.
    cat9k-rpboot.17.03.01.SPA.pkg
      File is in use, will not delete.
    cat9k-sipbase.17.03.01.SPA.pkg
      File is in use, will not delete.
    cat9k-sipspa.17.03.01.SPA.pkg
      File is in use, will not delete.
    cat9k-srdriver.17.03.01.SPA.pkg
      File is in use, will not delete.
    cat9k-webui.17.03.01.SPA.pkg
      File is in use, will not delete.
    cat9k-wlc.17.03.01.SPA.pkg
      File is in use, will not delete.
    packages.conf
      File is in use, will not delete.
  done.
 
The following files will be deleted:
[switch 1]:
/flash/cat9k-cc_srdriver.17.03.01.SPA.pkg
/flash/cat9k-espbase.17.03.01.SPA.pkg
/flash/cat9k-guestshell.17.03.01.SPA.pkg
/flash/cat9k-rpbase.17.03.01.SPA.pkg
/flash/cat9k-rpboot.17.03.01.SPA.pkg
/flash/cat9k-sipbase.17.03.01.SPA.pkg
/flash/cat9k-sipspa.17.03.01.SPA.pkg
/flash/cat9k-srdriver.17.03.01.SPA.pkg
/flash/cat9k-webui.17.03.01.SPA.pkg
/flash/cat9k-wlc.17.03.01.SPA.pkg
/flash/packages.conf
 
Do you want to remove the above files? [y/n]y

[switch 1]:
Deleting file flash:cat9k-cc_srdriver.17.03.01.SPA.pkg ... done.
Deleting file flash:cat9k-espbase.17.03.01.SPA.pkg ... done.
Deleting file flash:cat9k-guestshell.17.03.01.SPA.pkg ... done.
Deleting file flash:cat9k-rpbase.17.03.01.SPA.pkg ... done.
Deleting file flash:cat9k-rpboot.17.03.01.SPA.pkg ... done.
Deleting file flash:cat9k-sipbase.17.03.01.SPA.pkg ... done.
Deleting file flash:cat9k-sipspa.17.03.01.SPA.pkg ... done.
Deleting file flash:cat9k-srdriver.17.03.01.SPA.pkg ... done.
Deleting file flash:cat9k-webui.17.03.01.SPA.pkg ... done.
Deleting file flash:cat9k-wlc.17.03.01.SPA.pkg ... done.
Deleting file flash:packages.conf ... done.
SUCCESS: Files deleted.
--- Starting Post_Remove_Cleanup ---
Performing Post_Remove_Cleanup on all members
[1] Post_Remove_Cleanup package(s) on switch 1
[1] Finished Post_Remove_Cleanup on switch 1
Checking status of Post_Remove_Cleanup on [1]
Post_Remove_Cleanup: Passed on [1]
Finished Post_Remove_Cleanup
 
SUCCESS: install_remove Fri Nov 13 19:52:25 UTC 2020
Switch#

Step 2

Copy new image to flash

  1. copy tftp:[[//location]/directory]/filenameflash:

    Use this command to copy the new image from a TFTP server to flash memory. The location is either an IP address or a host name. The filename is specified relative to the directory used for file transfers. Skip this step if you want to use the new image from a TFTP server.
    Switch# copy tftp://10.8.0.6/image/cat9k_iosxe.17.04.01.SPA.bin flash:
destination filename [cat9k_iosxe.17.04.01.SPA.bin]?
Accessing tftp://10.8.0.6/image/cat9k_iosxe.17.04.01.SPA.bin...
Loading /cat9k_iosxe.17.04.01.SPA.bin from 10.8.0.6 (via GigabitEthernet0/0): 
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[OK - 601216545 bytes]
 
601216545 bytes copied in 50.649 secs (11870255 bytes/sec)

  2. dir flash:*.bin

    Use this command to confirm that the image has been successfully copied to flash. 
    Switch# dir flash:*.bin
Directory of flash:/*.bin
 
Directory of flash:/
 
434184 -rw- 601216545    Nov 13 2020 10:18:11 -07:00 cat9k_iosxe.17.04.01.SPA.bin
11353194496 bytes total (8976625664 bytes free)

Step 3

Set boot variable

  1. boot system flash:packages.conf

    Use this command to set the boot variable to flash:packages.conf .
    Switch(config)# boot system flash:packages.conf

  2. no boot manual

    Use this command to configure the switch to auto-boot. Settings are synchronized with the standby switch, if applicable.
    Switch(config)# no boot manual
Switch(config)# exit

  3. write memory

    Use this command to save boot settings.
    Switch# write memory

  4. show bootvar

    Use this command to verify the boot variable (packages.conf) and manual boot setting (no):
    Switch# show bootvar
BOOT variable = bootflash:packages.conf
MANUAL_BOOT variable = no
BAUD variable = 9600
ENABLE_BREAK variable = yes
BOOTMODE variable does not exist
IPXE_TIMEOUT variable does not exist
CONFIG_FILE variable = 

Standby BOOT variable = bootflash:packages.conf
Standby MANUAL_BOOT variable = no
Standby BAUD variable = 9600
Standby ENABLE_BREAK variable = yes
Standby BOOTMODE variable does not exist
Standby IPXE_TIMEOUT variable does not exist
Standby CONFIG_FILE variable =

Step 4

Install image to flash

install add file activate commit

Use this command to install the image.

We recommend that you point to the source image on a TFTP server or the flash , if you have copied the image to flash memory.

The following sample output displays installation of the Cisco IOS XE Bengaluru 17.4.1 software image to flash: 
Switch# install add file flash:cat9k_iosxe.17.04.01.SPA.bin activate commit
_install_add_activate_commit: START Fri Nov 13 16:37:25 IST 2020

*Nov 13 16:37:26.544 IST: %INSTALL-5-INSTALL_START_INFO: R0/0: install_engine: Started install one-shot flash:cat9k_iosxe.17.04.01.SPA.bin 
install_add_activate_commit: Adding PACKAGE
install_add_activate_commit: Checking whether new add is allowed ....

This operation requires a reload of the system. Do you want to proceed? 
Please confirm you have changed boot config to flash:packages.conf [y/n]y

--- Starting initial file syncing ---
Copying image file: flash:cat9k_iosxe.17.04.01.SPA.bin to standby
Info: Finished copying flash:cat9k_iosxe.17.04.01.SPA.bin to standby
Finished initial file syncing

--- Starting Add ---
Performing Add on Active/Standby
  [R0] Add package(s) on R0
  [R0] Finished Add on R0
  [R1] Add package(s) on R1
  [R1] Finished Add on R1
Checking status of Add on [R0 R1]
Add: Passed on [R0 R1]
Finished Add

Image added. Version: 17.4.01

install_add_activate_commit: Activating PACKAGE
Following packages shall be activated:
/flash/cat9k-wlc.17.04.01.SPA.pkg
/flash/cat9k-webui.17.04.01.SPA.pkg
/flash/cat9k-srdriver.17.04.01.SPA.pkg
/flash/cat9k-sipspa.17.04.01.SPA.pkg
/flash/cat9k-sipbase.17.04.01.SPA.pkg
/flash/cat9k-rpboot.17.04.01.SPA.pkg
/flash/cat9k-rpbase.17.04.01.SPA.pkg
/flash/cat9k-guestshell.17.04.01.SPA.pkg
/flash/cat9k-espbase.17.04.01.SPA.pkg
/flash/cat9k-cc_srdriver.17.04.01.SPA.pkg

This operation may require a reload of the system. Do you want to proceed? [y/n]y

--- Starting Activate ---
Performing Activate on Active/Standby
*Nov 13 16:45:21.695 IST: %INSTALL-5-INSTALL_AUTO_ABORT_TIMER_PROGRESS: R0/0: rollback_timer: Install auto abort timer will expire in 7200 seconds  [R0] Activate package(s) on R0
  [R0] Finished Activate on R0
  [R1] Activate package(s) on R1
  [R1] Finished Activate on R1
Checking status of Activate on [R0 R1]
Activate: Passed on [R0 R1]
Finished Activate

*Nov 13 16:45:25.233 IST: %INSTALL-5-INSTALL_AUTO_ABORT_TIMER_PROGRESS: R1/0: rollback_timer: Install auto abort timer will expire in 7200 seconds--- Starting Commit ---
Performing Commit on Active/Standby
  [R0] Commit package(s) on R0
  [R0] Finished Commit on R0
  [R1] Commit package(s) on R1
  [R1] Finished Commit on R1
Checking status of Commit on [R0 R1]
Commit: Passed on [R0 R1]
Finished Commit

Install will reload the system now!
SUCCESS: install_add_activate_commit  Fri Nov 13 16:46:18 IST 2020

Note

 
The system reloads automatically after executing the install add file activate commit command . You do not have to manually reload the system.

Step 5

Verify installation

After the software has been successfully installed, use the dir flash: command to verify that the flash partition has ten new .pkg files and two .conf files.

  1. dir flash:*.conf

    The following is sample output of the dir flash:*.pkg command: 
    Switch# dir flash:*.pkg
Directory of flash:/*.pkg
Directory of flash:/
475140 -rw- 2012104    Jul 17 2020 09:52:41 -07:00 cat9k-cc_srdriver.17.03.01.SPA.pkg
475141 -rw- 70333380   Jul 17 2020 09:52:44 -07:00 cat9k-espbase.17.03.01.SPA.pkg
475142 -rw- 13256      Jul 17 2020 09:52:44 -07:00 cat9k-guestshell.17.03.01.SPA.pkg
475143 -rw- 349635524  Jul 17 2020 09:52:54 -07:00 cat9k-rpbase.17.03.01.SPA.pkg
475149 -rw- 24248187   Jul 17 2020 09:53:02 -07:00 cat9k-rpboot.17.03.01.SPA.pkg
475144 -rw- 25285572   Jul 17 2020 09:52:55 -07:00 cat9k-sipbase.17.03.01.SPA.pkg
475145 -rw- 20947908   Jul 17 2020 09:52:55 -07:00 cat9k-sipspa.17.03.01.SPA.pkg
475146 -rw- 2962372    Jul 17 2020 09:52:56 -07:00 cat9k-srdriver.17.03.01.SPA.pkg
475147 -rw- 13284288   Jul 17 2020 09:52:56 -07:00 cat9k-webui.17.03.01.SPA.pkg
475148 -rw- 13248      Jul 17 2020 09:52:56 -07:00 cat9k-wlc.17.03.01.SPA.pkg

491524 -rw- 25711568   Nov 13 2020 11:49:33 -07:00  cat9k-cc_srdriver.17.04.01.SPA.pkg
491525 -rw- 78484428   Nov 13 2020 11:49:35 -07:00  cat9k-espbase.17.04.01.SPA.pkg
491526 -rw- 1598412    Nov 13 2020 11:49:35 -07:00  cat9k-guestshell.17.04.01.SPA.pkg
491527 -rw- 404153288  Nov 13 2020 11:49:47 -07:00  cat9k-rpbase.17.04.01.SPA.pkg
491533 -rw- 31657374   Nov 13 2020 11:50:09 -07:00  cat9k-rpboot.17.04.01.SPA.pkg
491528 -rw- 27681740   Nov 13 2020 11:49:48 -07:00  cat9k-sipbase.17.04.01.SPA.pkg
491529 -rw- 52224968   Nov 13 2020 11:49:49 -07:00  cat9k-sipspa.17.04.01.SPA.pkg
491530 -rw- 31130572   Nov 13 2020 11:49:50 -07:00  cat9k-srdriver.17.04.01.SPA.pkg
491531 -rw- 14783432   Nov 13 2020 11:49:51 -07:00  cat9k-webui.17.04.01.SPA.pkg
491532 -rw- 9160       Nov 13 2020 11:49:51 -07:00  cat9k-wlc.17.04.01.SPA.pkg

11353194496 bytes total (8963174400 bytes free)

  2. dir flash:*.conf

    The following is sample output of the dir flash:*.conf command. It displays the .conf files in the flash partition; note the two .conf files:

    • packages.conf—the file that has been re-written with the newly installed .pkg files.

    • cat9k_iosxe.17.04.01.SPA.conf— a backup copy of the newly installed packages.conf file. 

    Switch# dir flash:*.conf
 
Directory of flash:/*.conf
Directory of flash:/

16631  -rw- 4882 Nov 13 2020 05:39:42 +00:00  packages.conf
16634  -rw- 4882 Nov 13 2020 05:34:06 +00:00  cat9k_iosxe.17.04.01.SPA.conf

Step 6

Upgrade the ROMMON version

upgrade rom-monitor capsule golden

A new ROMMON version is available for Cisco IOS XE Bengaluru 17.4.1. After you enter the command, confirm upgrade at the system prompt.

In case of a high availability set up or a Cisco StackWise Virtual set up, remember to upgrade the active and standby.


Switch# upgrade rom-monitor capsule golden R0 
This operation will reload the switch and take a few minutes to complete. Do you want to proceed (y/n)? [confirm]y
Switch#
Initializing Hardware...
<output truncated>

For more information about this, see Upgrading the ROMMON in this document.

Step 7

Verify version

show version

After the image boots up, use this command to verify the version of the new image.

The following sample output of the show version command displays the Cisco IOS XE Bengaluru 17.4.1 image on the device:
Switch# show version
Cisco IOS XE Software, Version 17.04.01
Cisco IOS Software [Bengaluru], Catalyst L3 Switch Software (CAT9K_IOSXE), Version 17.4.1, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2020 by Cisco Systems, Inc..
<output truncated>

Downgrading in Install Mode

Follow these instructions to downgrade from one release to another, in install mode. To perform a software image downgrade, you must be booted into IOS through boot flash:packages.conf .

Before you begin

Note that you can use this procedure for the following downgrade scenarios:

When downgrading from ...

To ...

Cisco IOS XE Bengaluru 17.4.x

Cisco IOS XE Amsterdam 17.3.x or earlier releases.


Note
New switch models that are introduced in a release cannot be downgraded. The release in which a module is introduced is the minimum software version for that model. We recommend upgrading all existing hardware to the same release as the latest hardware.

The sample output in this section shows downgrade from Cisco IOS XE Bengaluru 17.4.1 to Cisco IOS XE Amsterdam 17.3.1, using install commands.

Procedure

Step 1

Clean-up

install remove inactive

Use this command to clean-up old installation files in case of insufficient space and to ensure that you have at least 1GB of space in flash, to expand a new image.

The following sample output displays the cleaning up of unused files, by using the install remove inactive command:
Switch# install remove inactive
 install_remove: START Fri Nov 13 11:42:27 IST 2020

Cleaning up unnecessary package files

No path specified, will use booted path bootflash:packages.conf

Cleaning bootflash:
  Scanning boot directory for packages ... done.
  Preparing packages list to delete ... 
    cat9k-cc_srdriver.17.04.01.SSA.pkg
      File is in use, will not delete.
    cat9k-espbase.17.04.01.SSA.pkg
      File is in use, will not delete.
    cat9k-guestshell.17.04.01.SSA.pkg
      File is in use, will not delete.
    cat9k-rpbase.17.04.01.SSA.pkg
      File is in use, will not delete.
    cat9k-rpboot.17.04.01.SSA.pkg
      File is in use, will not delete.
    cat9k-sipbase.17.04.01.SSA.pkg
      File is in use, will not delete.
    cat9k-sipspa.17.04.01.SSA.pkg
      File is in use, will not delete.
    cat9k-srdriver.17.04.01.SSA.pkg
      File is in use, will not delete.
    cat9k-webui.17.04.01.SSA.pkg
      File is in use, will not delete.
    cat9k-wlc.17.04.01.SSA.pkg
      File is in use, will not delete.
    packages.conf
      File is in use, will not delete.
  done.
SUCCESS: No extra package or provisioning files found on media. Nothing to clean.

SUCCESS: install_remove  Fri Nov 14 11:42:39 IST 2020

--- Starting Post_Remove_Cleanup ---
Performing Post_Remove_Cleanup on all members
[1] Post_Remove_Cleanup package(s) on switch 1
[1] Finished Post_Remove_Cleanup on switch 1
Checking status of Post_Remove_Cleanup on [1]
Post_Remove_Cleanup: Passed on [1]
Finished Post_Remove_Cleanup
 
SUCCESS: install_remove Fri Nov 14 19:52:25 UTC 2019
Switch#

Step 2

Copy new image to flash

  1. copy tftp:[[//location]/directory]/filenameflash:

    Use this command to copy the new image from a TFTP server to flash memory. The location is either an IP address or a host name. The filename is specified relative to the directory used for file transfers. Skip this step if you want to use the new image from a TFTP server.
    Switch# copy tftp://10.8.0.6/image/cat9k_iosxe.17.03.01.SPA.bin flash:
Destination filename [cat9k_iosxe.17.03.01.SPA.bin]?
Accessing tftp://10.8.0.6//cat9k_iosxe.17.03.01.SPA.bin...
Loading /cat9k_iosxe.17.03.01.SPA.bin from 10.8.0.6 (via GigabitEthernet0/0): 
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[OK - 508584771 bytes]
508584771 bytes copied in 101.005 secs (5035244 bytes/sec)

  2. dir flash:

    Use this command to confirm that the image has been successfully copied to flash. 
    Switch# dir flash:*.bin
Directory of flash:/*.bin
 
Directory of flash:/
 
434184 -rw- 508584771 Nov 13 2020 13:35:16 -07:00 cat9k_iosxe.17.03.01.SPA.bin
11353194496 bytes total (9055866880 bytes free)

Step 3

Set boot variable

  1. boot system flash:packages.conf

    Use this command to set the boot variable to flash:packages.conf .
    Switch(config)# boot system flash:packages.conf

  2. no boot manual

    Use this command to configure the switch to auto-boot. Settings are synchronized with the standby switch, if applicable.
    Switch(config)# no boot manual
Switch(config)# exit

  3. write memory

    Use this command to save boot settings.
    Switch# write memory

  4. show bootvar

    Use this command to verify the boot variable (packages.conf) and manual boot setting (no):
    Switch# show bootvar
BOOT variable = bootflash:packages.conf
MANUAL_BOOT variable = no
BAUD variable = 9600
ENABLE_BREAK variable = yes
BOOTMODE variable does not exist
IPXE_TIMEOUT variable does not exist
CONFIG_FILE variable = 

Standby BOOT variable = bootflash:packages.conf
Standby MANUAL_BOOT variable = no
Standby BAUD variable = 9600
Standby ENABLE_BREAK variable = yes
Standby BOOTMODE variable does not exist
Standby IPXE_TIMEOUT variable does not exist
Standby CONFIG_FILE variable =

Step 4

Downgrade software image

install add file activate commit

Use this command to install the image.

We recommend that you point to the source image on a TFTP server or the flash , if you have copied the image to flash memory.

The following example displays the installation of the Cisco IOS XE Amsterdam 17.3.1 software image to flash, by using the install add file activate commit command. 
Switch# install add file flash:cat9k_iosxe.17.03.01.SPA.bin activate commit
_install_add_activate_commit: START Fri Nov 13 21:37:25 IST 2020

*Nov 13 16:37:26.544 IST: %INSTALL-5-INSTALL_START_INFO: R0/0: install_engine: Started install one-shot flash:cat9k_iosxe.17.03.01.SPA.bin 
install_add_activate_commit: Adding PACKAGE
install_add_activate_commit: Checking whether new add is allowed ....

This operation requires a reload of the system. Do you want to proceed? 
Please confirm you have changed boot config to flash:packages.conf [y/n]y

--- Starting initial file syncing ---
Copying image file: flash:cat9k_iosxe.17.03.01.SPA.bin to standby
Info: Finished copying flash:cat9k_iosxe.17.03.01.SPA.bin to standby
Finished initial file syncing

--- Starting Add ---
Performing Add on Active/Standby
  [R0] Add package(s) on R0
  [R0] Finished Add on R0
  [R1] Add package(s) on R1
  [R1] Finished Add on R1
Checking status of Add on [R0 R1]
Add: Passed on [R0 R1]
Finished Add

Image added. Version: 17.03.1
install_add_activate_commit: Activating PACKAGE
Following packages shall be activated:
/flash/cat9k-wlc.17.03.01.SPA.pkg
/flash/cat9k-webui.17.03.01.SPA.pkg
/flash/cat9k-srdriver.17.03.01.SPA.pkg
/flash/cat9k-sipspa.17.03.01.SPA.pkg
/flash/cat9k-sipbase.17.03.01.SPA.pkg
/flash/cat9k-rpboot.17.03.01.SPA.pkg
/flash/cat9k-rpbase.17.03.01.SPA.pkg
/flash/cat9k-guestshell.17.03.01.SPA.pkg
/flash/cat9k-espbase.17.03.01.SPA.pkg
/flash/cat9k-cc_srdriver.17.03.01.SPA.pkg

This operation may require a reload of the system. Do you want to proceed? [y/n]y

--- Starting Activate ---
Performing Activate on Active/Standby

*Nov 13 21:45:21.695 IST: %INSTALL-5-INSTALL_AUTO_ABORT_TIMER_PROGRESS: R0/0: rollback_timer: Install auto abort timer will expire in 7200 seconds  [R0] Activate package(s) on R0
  [R0] Finished Activate on R0
  [R1] Activate package(s) on R1
  [R1] Finished Activate on R1
Checking status of Activate on [R0 R1]
Activate: Passed on [R0 R1]
Finished Activate


*Nov 13 21:45:25.233 IST: %INSTALL-5-INSTALL_AUTO_ABORT_TIMER_PROGRESS: R1/0: rollback_timer: Install auto abort timer will expire in 7200 seconds--- Starting Commit ---
Performing Commit on Active/Standby
  [R0] Commit package(s) on R0
  [R0] Finished Commit on R0
  [R1] Commit package(s) on R1
  [R1] Finished Commit on R1
Checking status of Commit on [R0 R1]
Commit: Passed on [R0 R1]
Finished Commit

Install will reload the system now!
SUCCESS: install_add_activate_commit  Fri Nov 13 21:46:18 IST 2020

Note

 
The system reloads automatically after executing the install add file activate commit command. You do not have to manually reload the system.

Step 5

Verify version

show version

After the image boots up, use this command to verify the version of the new image.

Note

 
When you downgrade the software image, the ROMMON version does not downgrade. It remains updated.
The following sample output of the show version command displays the Cisco IOS XE Amsterdam 17.3.1 image on the device:
Switch# show version
Cisco IOS XE Software, Version 17.03.01
Cisco IOS Software [Amsterdam], Catalyst L3 Switch Software (CAT9K_IOSXE), Version 17.3.1, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2019 by Cisco Systems, Inc.
<output truncated>

Field-Programmable Gate Array Version Upgrade

A field-programmable gate array (FPGA) is a type of programmable memory device that exists on Cisco switches. They are re-configurable logic circuits that enable the creation of specific and dedicated functions.

There is no FPGA upgrade in Cisco IOS XE Bengaluru 17.4.1. To check the current FPGA version, enter the show firmware version all command in IOS mode or the version -v command in ROMMON mode.


Note

  • Not every software release has a change in the FPGA version.

  • The version change occurs as part of the regular software upgrade and you do not have to perform any other additional steps.

Licensing

This section provides information about the licensing packages for features available on Cisco Catalyst 9000 Series Switches.

License Levels

The software features available on Cisco Catalyst 9600 Series Switches fall under these base or add-on license levels.

Base Licenses

  • Network Advantage

Add-On Licenses

Add-On Licenses require a Network Essentials or Network Advantage as a pre-requisite. The features available with add-on license levels provide Cisco innovations on the switch, as well as on the Cisco Digital Network Architecture Center (Cisco DNA Center).

  • DNA Advantage

To find information about platform support and to know which license levels a feature is available with, use Cisco Feature Navigator. To access Cisco Feature Navigator, go to https://cfnng.cisco.com. An account on cisco.com is not required.

Available Licensing Models and Configuration Information

  • Cisco IOS XE Gibraltar 16.11.1 to Cisco IOS XE Amsterdam 17.3.1: Smart Licensing is the default and the only supported method to manage licenses.

    In the software configuration guide of the required release, see System Management → Configuring Smart Licensing.

  • Cisco IOS XE Amsterdam 17.3.2a and later: Smart Licensing Using Policy, which is an enhanced version of Smart Licensing, is the default and the only supported method to manage licenses.

    For more information, see Configuring Licenses on Cisco Catalyst 9000 Series Switches.

For a more detailed overview on Cisco Licensing, go to Cisco Software Licensing Guide.

License Levels - Usage Guidelines

  • The duration or term for which a purchased license is valid:

    Smart Licensing Using Policy

    Smart Licensing

    • Perpetual: There is no expiration date for such a license.

    • Subscription: The license is valid only until a certain date (for a three, five, or seven year period).

    • Permanent: for a license level, and without an expiration date.

    • Term: for a license level, and for a three, five, or seven year period.

    • Evaluation: a license that is not registered.

  • Base licenses (Network-Advantage) are ordered and fulfilled only with a perpetual or permanent license type.

  • Add-on licenses (DNA Advantage) are ordered and fulfilled only with a subscription or term license type.

  • An add-on license level is included when you choose a network license level. If you use DNA features, renew the license before term expiry, to continue using it, or deactivate the add-on license and then reload the switch to continue operating with the base license capabilities.

  • Evaluation licenses cannot be ordered. They are not tracked via Cisco Smart Software Manager and expire after a 90-day period. Evaluation licenses can be used only once on the switch and cannot be regenerated. Warning system messages about an evaluation license expiry are generated only 275 days after expiration and every week thereafter. An expired evaluation license cannot be reactivated after reload. This applies only to Smart Licensing. The notion of evaluation licenses does not apply to Smart Licensing Using Policy.

Scaling Guidelines

For information about feature scaling guidelines, see the Cisco Catalyst 9600 Series Switches datasheets at:

https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-9600-series-switches/nb-06-cat9600-series-data-sheet-cte-en.html

https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-9600-series-switches/nb-06-cat9600-series-line-data-sheet-cte-en.html

https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-9600-series-switches/nb-06-cat9600-ser-sup-eng-data-sheet-cte-en.html

Limitations and Restrictions

  • Auto negotiation: The SFP+ interface (TenGigabitEthernet0/1) on the Ethernet management port with a 1G transceiver does not support auto negotiation.

  • Control Plane Policing (CoPP)—The show run command does not display information about classes configured under system-cpp policy, when they are left at default values. Use the show policy-map system-cpp-policy or the show policy-map control-plane commands in privileged EXEC mode instead.

  • Convergence: During SSO, a higher convergence time is observed while removing the active supervisor module installed in slot 3 of a C9606R chassis.

  • Hardware Limitations — Optics:

    • Installation restriction for C9600-LC-24C linecard with CVR-QSFP-SFP10G adapter —This adapter must not be installed on an even numbered port where the corresponding odd numbered port is configured as 40GE port. For example, if port 1 is configured as 40GE, CVR-QSFP-SFP10G must not be installed in port 2.

      Installation restriction for C9600-LC-24C linecard with CVR-QSFP-SFP10G adapter — If you insert a 40-Gigabit Ethernet Transceiver Module to odd numbered port, the corresponding even numbered port does not work with CVR-QSFP-SFP10G adapter.

    • GLC-T and GLC-TE operating at 10/100Mbps speed are not supported with Cisco QSA Module (CVR-QSFP-SFP10G).

    • SFP-10G-T-X supports 100Mbps/1G/10G speeds based on auto negotiation with the peer device. You cannot force speed settings from the transceiver.

  • Hardware Limitations — Power Supply Modules:

    • Input voltage for AC power supply modules—All AC-input power supply modules in the chassis must have the same AC-input voltage level.

    • Using power supply modules of different types—When mixing AC-input and DC-input power supplies, the AC-input voltage level must be 220 VAC.

  • In-Service Software Upgrade (ISSU)

    • While ISSU allows you to perform upgrades with zero downtime, we recommend you to do so during a maintenance window only.

    • If a new feature introduced in a software release requires a change in configuration, the feature should not be enabled during ISSU.

    • If a feature is not available in the downgraded version of a software image, the feature should be disabled before initiating ISSU.

  • HTTP Services limitations—If you configure ip http active-session-modules none and ip http secure-active-session-modules none commands, NGINX process will be held down. This will prevent HTTP or HTTPS from running. Use ip http session-module-list the command to enable the required HTTP modules.

  • QoS restrictions

    • When configuring QoS queuing policy, the sum of the queuing buffer should not exceed 100%.

    • For QoS policies, only switched virtual interfaces (SVI) are supported for logical interfaces.

    • QoS policies are not supported for port-channel interfaces, tunnel interfaces, and other logical interfaces.

  • Secure Shell (SSH)

    • Use SSH Version 2. SSH Version 1 is not supported.

    • When the device is running SCP and SSH cryptographic operations, expect high CPU until the SCP read process is completed. SCP supports file transfers between hosts on a network and uses SSH for the transfer.

      Since SCP and SSH operations are currently not supported on the hardware crypto engine, running encryption and decryption process in software causes high CPU. The SCP and SSH processes can show as much as 40 or 50 percent CPU usage, but they do not cause the device to shutdown.

  • Smart Licensing Using Policy: Starting with Cisco IOS XE Amsterdam 17.3.2a, with the introduction of Smart Licensing Using Policy, even if you configure a hostname for a product instance or device, only the Unique Device Identifier (UDI) is displayed. This change in the display can be observed in all licensing utilities and user interfaces where the hostname was displayed in earlier releases. It does not affect any licensing functionality. There is no workaround for this limitation.

    The licensing utilities and user interfaces that are affected by this limitation include only the following: Cisco Smart Software Manager (CSSM), Cisco Smart License Utility (CSLU), and Smart Software Manager On-Prem (SSM On-Prem).

  • TACACS legacy command: Do not configure the legacy tacacs-server host command; this command is deprecated. If the software version running on your device is Cisco IOS XE Gibraltar 16.12.2 or a later release, using the legacy command can cause authentication failures. Use the tacacs server command in global configuration mode.

  • USB Authentication—When you connect a Cisco USB drive to the switch, the switch tries to authenticate the drive against an existing encrypted preshared key. Since the USB drive does not send a key for authentication, the following message is displayed on the console when you enter password encryption aes command:
    Device(config)# password encryption aes
Master key change notification called without new or old key

  • VLAN Restriction—It is advisable to have well-defined segregation while defining data and voice domain during switch configuration and to maintain a data VLAN different from voice VLAN across the switch stack. If the same VLAN is configured for data and voice domains on an interface, the resulting high CPU utilization might affect the device.

  • YANG data modeling limitation—A maximum of 20 simultaneous NETCONF sessions are supported.

  • Embedded Event Manager—Identity event detector is not supported on Embedded Event Manager.

  • The File System Check (fsck) utility is not supported in install mode.

Caveats

Caveats describe unexpected behavior in Cisco IOS-XE releases. Caveats listed as open in a prior release are carried forward to the next release as either open or resolved.

Cisco Bug Search Tool

The Cisco Bug Search Tool (BST) allows partners and customers to search for software bugs based on product, release, and keyword, and aggregates key data such as bug details, product, and version. The BST is designed to improve the effectiveness in network risk management and device troubleshooting. The tool has a provision to filter bugs based on credentials to provide external and internal bug views for the search input.

To view the details of a caveat, click on the identifier.

Open Caveats in Cisco IOS XE Bengaluru 17.4.x

Identifier

Description

CSCvv91619

Crash seen after removing/defaulting REP interfaces using range config

CSCvw04604

Standby chassis goes for continuous reload and active switch crashed with template mismatch

CSCvw17155

Notification timer Expired for RF Client: Inline Power rf client(505)

CSCvw17869

Uplink port goes down after "no switchport" is issued

CSCvw67128

Purchase info should be protected and shouldn't be able to erase.

Resolved Caveats in Cisco IOS XE Bengaluru 17.4.1

Identifier

Description

CSCvu14246

multichassis etherchannel with macsec goes down when stack standby removed

CSCvu53267

Failed Identification Test for C9600-SUP-1 log message appearing after bootup

CSCvw31564

When ip tcp adjust-mss is enabled, TCP packets that are already fragmented will get dropped

Troubleshooting

For the most up-to-date, detailed troubleshooting information, see the Cisco TAC website at this URL:

https://www.cisco.com/en/US/support/index.html

Go to Product Support and select your product from the list or enter the name of your product. Look under Troubleshoot and Alerts, to find information for the problem that you are experiencing.

Related Documentation

Information about Cisco IOS XE at this URL: https://www.cisco.com/c/en/us/products/ios-nx-os-software/ios-xe/index.html

All support documentation for Cisco Catalyst 9600 Series Switches is at this URL: https://www.cisco.com/c/en/us/support/switches/catalyst-9600-series-switches/tsd-products-support-series-home.html

Cisco Validated Designs documents at this URL: https://www.cisco.com/go/designzone

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: https://cfnng.cisco.com/mibs

Communications, Services, and Additional Information

  • To receive timely, relevant information from Cisco, sign up at Cisco Profile Manager.

  • To get the business results you’re looking for with the technologies that matter, visit Cisco Services.

  • To submit a service request, visit Cisco Support.

  • To discover and browse secure, validated enterprise-class apps, products, solutions and services, visit Cisco DevNet.

  • To obtain general networking, training, and certification titles, visit Cisco Press.

  • To find warranty information for a specific product or product family, access Cisco Warranty Finder.

Cisco Bug Search Tool

Cisco Bug Search Tool (BST) is a web-based tool that acts as a gateway to the Cisco bug tracking system that maintains a comprehensive list of defects and vulnerabilities in Cisco products and software. BST provides you with detailed defect information about your products and software.