ROS路由表的导入与导出：
import 导入
export 导出
导出全部配置：
/export file=filename
只导出路由表
/ip route export file=filename
导出防火墙
/ip firewall export file=filename
备份路由器设置：
backup/ -- Makes a full system backup
load -- Loads a previously saved backup
save -- Makes a backup of the current configuration
备份
/system
/backup
save name=filename
还原
/system
/backup
load name=filename
Restore and reboot? [y/N]:
恢复路由默认值：
system
reset
y
