> ## Documentation Index
> Fetch the complete documentation index at: https://docs.levelblue.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Configuring the ADTRAN (AOS) Switch for Port Mirroring

Complete one of these tasks to configure the ADTRAN Operating System (AOS) Switch for port mirroring, either through the switch CLI or the switch web UI.

## Configuration Through the CLI

**To configure the device through the CLI**

1. Open a monitor session.

2. Specify the port to be mirrored (the source port).

   ```
   (config)#monitor session 1 source interface ethernet 0/<source_port>
   ```

3. Specify the port that is going to mirror the traffic (the destination port).

   ```
   (config)#monitor session 1 destination interface ethernet 0/<destination_port>
   ```

   <Note>
     **Note:** There can be only one monitor session. Therefore, the only available monitor session is "1."
   </Note>

4. Verify the configuration of the mirrored ports.

   ```
   Switch#show monitor session all
   ```

## Configuration Through the Web UI

**To configure the device in the web UI**

1. Go to **Utilities > Port Mirroring**.

2. Choose **Destination Port** and select the proper port from this menu.

3. (Optional.) Select the **No-Tag** option so as not to tag virtual local area network (VLAN) traffic.

4. Select the **Source Port** to mirror from the menu.

5. Click **Add**.

   <Note>
     **Note:** If you want to add additional source ports to monitor, select another port from the **Source Port** menu and click **Add**.
   </Note>

6. In the command-line interface (CLI), you can verify the configuration of the mirrored ports.

   ```
   Switch#show monitor session all
   ```

To learn more about configuring port mirroring on AOS switches, refer to the [Configuring Port Mirroring on AOS document](https://supportcommunity.adtran.com/jmaxz83287/attachments/jmaxz83287/nv-aos/198/1/Configuring%20Port%20Mirroring%20in%20AOS.pdf) on the vendor website.