> For the complete documentation index, see [llms.txt](https://docs.verge.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.verge.io/run-the-platform/zh/wang-luo/port-mirroring.md).

# 端口镜像

端口镜像会将网络流量复制到一个虚拟机网卡，从而允许对数据包进行分析，用于监控或诊断。

## 配置端口镜像

1. 启用 **端口镜像** 在网络设置中。 ![portmirrordropdown.png](/files/fdcce8b9502af4ccb5e88584af7f7ac746fb5ef7)
   * 选择 ***南北向*** 复制经过网络路由器的数据包
   * 选择 ***东西向*** 复制经过路由器以及所有网络内部数据包

{% hint style="warning" %}
***东西向***** 端口镜像通常只建议作为用于诊断的临时设置；长时间使用可能会影响性能，因为它会复制所有网络流量。**
{% endhint %}

2. 单击 **提交** 以保存更改。
3. 单击 **重启** 在左侧菜单中启动网络。
4. 创建一个将用于端口分析的虚拟机（或使用现有虚拟机）。
5. [**向虚拟机添加一个网卡**](/run-the-platform/zh/xu-ni-ji/vm-nics.md):
   * 在 **网络** 字段，选择： *NETWORKNAME*\_mirror
   * 单击 **提交** （页面底部）以保存
6. （重新）启动虚拟机。
7. 可在虚拟机中使用所选的操作系统/应用软件进行数据包分析。


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