QFX5220-128C chassis are unable to transfer backup config on commit, manual copy works which proves end to end reachability.

root@root> show configuration system archival | display set 

set system archival configuration transfer-on-commit

set system archival configuration archive-sites "scp://[email protected]/home/labroot"

Please follow the below sequence for archival feature to work in EVO:

1. Delete the existing archival configuration and commit.
2. Logout from the device.
3. Login back as root user.
4. Operational>request security ssh password-less-authentication remote-user backup remote-host 10.117.107.188
   1. From the operational mode, execute the above command for password-less-authentication.
5. Configure transfer-on-commit now and commit the change.
6. Archival should work now.

If issue persists, please contact JTAC for further troubleshooting