router NAT配置https://support.huawei.com/enterprise/zh/doc/EDOC1100112409/2b22ffc5全部版本https://support.huawei.com/enterprise/zh/routers/ar800-700-300-200-pid-254120455?category=configuration-commissioning
华为官网需要注册才能下载，附件也搬过来
https://files.cnblogs.com/files/dong1/NetEngine-AR-V300R019%E9%85%8D%E7%BD%AE%E6%8C%87%E5%8D%97-IP%E4%B8%9A%E5%8A%A1(%E5%91%BD%E4%BB%A4%E8%A1%8C).zip
