Not possible to upload IOS file to the switch

[lnw-team]

Hello, 

today I was trying to upload file to my C3850  switch. Unfortunatley, I received the following error:

I get the same error message for all other IOS files.

Any ideas?

[Mark Elsen]

   - Check local logs on switch after those attempts and also the logs from the remote sftp service ,

 M.

[Richard Burts]

The original post shows some messages indicating problems in transferring an OS file. There are a few questions which might shed some light on the issue:

- are you sure that the destination address for the request is correct?

- does the destination device run sftp?

- have you attempted transfer protocols other than sftp?

- are you sure that the remote server has the correct file? And if so is that file in the correct directory?

- is it possible that between your switch and the server there is some type of security device (firewall etc) that might affect the attempt to transfer the file?

I agree with @Mark Elsen that checking for log messages would be a good place to start investigating the problem.

[Leo Laohoo]

The syntax is incorrect. 

Look at the screenshot and the system interaction.  A Source Username of "sftp"?  Look at the Source Filename.