code: def _Ifup(self, interfaces, logger):
      
      ifup = ['/usr/sbin/wicked', 'ifup', '--timeout', '1']
      try:
        subprocess.check_call(ifup + interfaces)
      except subprocess.CalledProcessError:
        logger.warning('Could not activate interfaces %s.', interfaces)
docs: Activate network interfaces.
  
      Args:
        interfaces: list of string, the output device names to enable.
        logger: logger object, used to write to SysLog and serial port.