code: def attach_remote_media(self, url, username=None, password=None):
          
          self.oem_init()
          return self._oem.attach_remote_media(url, username, password)
docs: Attach remote media by url
  
          Given a url, attach remote media (cd/usb image) to the target system.
  
          :param url:  URL to indicate where to find image (protocol support
                       varies by BMC)
          :param username: Username for endpoint to use when accessing the URL.
                           If applicable, 'domain' would be indicated by '@' or
                           '\' syntax.
          :param password: Password for endpoint to use when accessing the URL.