def GetForwardedIps(self, interface, interface_ip=None):
    """Retrieve the list of configured forwarded IP addresses.

    Args:
      interface: string, the output device to query.
      interface_ip: string, current interface ip address.

    Returns:
      list, the IP address strings.
    """
    args = ['ls', 'table', 'local', 'type', 'local']
    options = self._CreateRouteOptions(dev=interface)
    result = self._RunIpRoute(args=args, options=options)
    result = re.sub(r'local\s', r'', result)
    return self.ParseForwardedIps(result.split())