CBS350 Firmware Upload failing

[efries_wy]

I have https firmware uploads failing on multiple switches at different clients.  The logs show a generic "the copy operation failed".  Two of the switches:
CBS350-24p-4G | firmware v3.2.0.84

CBS350-24p-4x | firmware v3.3.0.16

An upload of the same firmware file v3.5.0.26 upload works successfully using ssh and tftp.

I have tried:

• Confirming the hash and re-downloading the firmware.
• Different browsers.
• 3 different firmware versions:
  • 3.3.0.16
  • 3.4.0.17
  • 3.5.0.26
• Moving the downloaded file to a local, non-redirected, not OneDrive, path.
• Disabling http so login and upload are definitely via https.

I would appreciate any ideas, upgrading via tftp will be much more time intensive vs https.

Thank you.

[marce1000]

  - Check access and error logs on (from) the remote web server, look for success on transfer of the intended files (firmware) or not (e.g.)

 M.

[efries_wy]

Hmm, this is an https upload via browser that is failing, there is no remote web server, not sure what you are referring to?

[marce1000]

- If there is an upload through http/https  then by definition it must come from a remote webserver, but I forgot that this may be from Cisco directly, I noticed below that you can also upload through  a local file. Does that work ?
     Meaning downloading the firmware first in that case.

  M.

[efries_wy]

Steps taken:

• Logon to local workstation on same network as CBS350 switch.
• Download firmware from Cisco.com to local workstation.
  • Download is from remote webserver, this is successful. 
  • Confirm file hash matches.
  • Login to Cisco CBS350 via https
    • Upload firmware file from local workstation via https to CBS350.
    • Upload fails with a generic error.
      
      
• Login to same CBS350 via ssh from same workstation.
  • Upload same firmware file via tftp.
  • this is successful