Dell SmartFabric OS10 Installation, Upgrade, and Downgrade Guide

Downgrade to OS10 release 10.5.1.x or later

In this example, the OS10 switch runs the 10.5.2.0 software and the following procedure downgrades the system to Release 10.5.1.9.

Prerequisites

Obtain a backup of the configuration data. Ensure that you have a copy of the license files. Reapply the configuration data and licenses files after you reload to 10.5.1.9.

1. Back up the current running configuration to an external storage.

   OS10# copy running-configuration scp://userid:passwd@hostip/filepath/10.5.2.0-running-configuration.txt

2. Back up the startup configuration (startup.xml) to an external storage.

   OS10# write memory
   OS10# copy config://startup.xml scp://userid:passwd@hostip/filepath/10.5.2.0-startup.xml

3. Download the OS10 binary image for Release 10.5.1.9, also called the standby image, from a local server using the image download server-filepath/filename command in EXEC mode; for example:

   OS10# image download scp://admin:passwd@10.1.1.1/home/admin/images/OS10EE.bin

4. (Optional) View the current software download status in EXEC mode.

   OS10# show image status

5. Install the OS10 standby image using the image install file-url command in EXEC mode, where filename is the name of the image file that was downloaded with the image download command; for example:

   OS10# image install image://OS10EE.bin

6. (Optional) View the status of the software installation in EXEC mode.

   OS10# show image status 
   Image Upgrade State:     idle
   ==================================================
   File Transfer State:     transfer-success
   --------------------------------------------------
     State Detail:          Completed: No error
     Task Start:            2019-11-19T06:55:44Z
     Task End:              2019-11-19T06:55:53Z
     Transfer Progress:     100 %
     Transfer Bytes:        469343880 bytes
     File Size:             469343880 bytes
     Transfer Rate:         67812 kbps
    
   Installation State:      install-success
   --------------------------------------------------
     State Detail:          Completed: Success
     Task Start:            2019-11-19T06:55:53Z
     Task End:              2019-11-19T06:56:01Z

7. Use the show boot detail command to view the standby image. Change the next boot image to the standby image in EXEC mode. Reload the device. The device comes up with 10.5.1.9 software image.

   OS10# show boot detail

   OS10# boot system standby

   OS10# reload

8. Use the show version command in EXEC mode to verify that the downloaded OS10 image is installed as the current running version.

   OS10# show version
   Dell EMC Networking OS10 Enterprise
   Copyright (c) 1999-2019 by Dell Inc. All Rights Reserved.
   OS Version: 10.5.1.9
   Build Version: 10.5.1.9.124
   Build Time: 2020-02-12T02:34:02Z
   System Type: S4148F-ON
   Architecture: x86_64
   Up Time: 1 day 00:54:13

9. If the saved configuration from Release 10.5.1.9 (or the later release to which you are downgrading to) is available, apply the saved configuration and license files, and reload the switch.

   OS10# copy scp://userid:passwd@hostip/filepath/10.5.1.9-startup.xml config://startup.xml
   

   OS10# license install scp://user:passwd@hostip/0A900Q2-NOSEnterprise-License.xml

   OS10# reload

   NOTE:While reloading, if the CLI prompts to save, select no for the save option. Selecting yes overrides the configuration that was copied earlier.
   NOTE:If you have made any non-default hardware settings before the downgrade, after you downgrade and restore the configuration, use the show hardware command to check if your settings are applied. If not, save and reload the box for the settings to be applied. On the S4100-ON Series switches, if you have a non-default switch port profile configured, this setting might not be applied. Apply the switch port profile configuration first, save the configuration, and then restore the configuration file.
10. If the saved configuration file from Release 10.5.1.9 (or the later release) that you are downgrading to is not available, apply the backup text configuration (.txt) taken earlier. Ensure that the backup configuration text file does not have any unsupported commands (commands that are introduced in later releases). If unsupported commands are present in the text file, the system reports an error. If any of the configurations require a reload, you might have to reload the switch.

    OS10# copy scp://userid:passwd@hostip/filepath/backup-running-configuration.txt running-configuration
    OS10# write memory
    OS10# reload