On the ISG appliance, there is an option to upload the application image using "URL".
The ISG appliance does not have internet access.
Application images have been uploaded to the local server.
The only supported protocols for uploading the ISG application image are HTTP and HTTPS.
ISG(config-images)# load http://<local server hostname or IP>/image.bcsi
ISG(config-images)# load https://<local server hostname or IP>/image.bcsi
If you attempt to use other protocols like FTP or SCP, there will be an error - "Invalid URL".
ISG(config-images)# load ftp://<local server hostname or IP>/image.bcsi
Error: Invalid URL