Technical Tip: Procedure to upgrade managed FortiSwitches via FortiGate with same model in batches (CLI)

1. Create a FortiSwitch group on the FortiGate.

config switch-controller switch-group

    edit "<group-name>"

        set description "Optional description"

        set member "<switch_id_1>" "<switch_id_2>"

    next

end

2. Use the following command to upload the FortiSwitch firmware image to the FortiGate's local storage. 
   1. This will require an FTP/TFTP server to be set up to upload the FortiSwitch image.
   2. FortiSwitch firmware image files are available for download on support.fortinet.com
   3. Note down the image file name in the output 'Image Saving [filename].swtp ...'.

execute switch-controller switch-software upload ftp/tftp <image-name> <server-ip>

3. Use the following command to stage a firmware image on FortiSwitch units:

execute switch-controller switch-software stage switch-group <switch-group ID> <filename.swtp>

The filename can be retrieved using the command below:

execute switch-controller switch-software list-available

4. Check the status of image staging using the command below:

execute switch-controller get-upgrade-status

5. To update a designated FortiSwitch group, execute the command below:

execute switch-controller switch-action restart swtp switch-group <switch-group ID>

Related document:

Viewing and upgrading the FortiSwitch firmware version