> [!CAUTION]
> **Caution:** This documentation covers Edge for Private Cloud 4.19.06, which is no longer supported. Google does not provide security patches, bug fixes, or technical support for this version. The current supported version is 4.54.00. See the [Edge for Private Cloud documentation](https://docs.apigee.com/private-cloud/latest/overview) for the current version, or [All versions](https://docs.apigee.com/private-cloud/versions) to compare releases.

By default, all runtime API calls to Apigee Edge for Private Cloud use IPv4. You can add IPv6 support to the Router by
setting the
`conf_load_balancing_load.balancing.driver.nginx.listen.endpoint.all.interfaces.enabled`
property to `true` on your Router.

> [!IMPORTANT]
> **TIP:** You can check if IPv6 is already enabled by logging into the Router and searching for this property, as the following example shows:
>
> ```
> /opt/apigee/apigee‑service/bin/apigee‑service edge‑router configure 
>   ‑‑search 
>   conf_load_balancing_load.balancing.driver.nginx.listen.endpoint.all.interfaces.enabled
> ```

**To enable IPv6 on your Router:**

1. Log in to the Router.
2. Open the `router.properties` configuration file in an editor:

   ```
   vi /opt/apigee/customer/application/router.properties
   ```

   If the file does not exist, create it.
3. Set the following property to `true`:

   ```
   conf_load_balancing_load.balancing.driver.nginx.listen.endpoint.all.interfaces.enabled
   ```

   For example:

   ```
   conf_load_balancing_load.balancing.driver.nginx.listen.endpoint.all.interfaces.enabled=true
   ```
4. Save your changes to the properties file.
5. Restart the router by executing the following command:

   ```
   /opt/apigee/apigee‑service/bin/apigee‑service edge‑router restart
   ```

   During the restart, you should see output that is similar to the following:

   ```
   [ChangeDelta, position: 775, lines:
     [load.balancing.driver.nginx.listen.endpoint.all.interfaces.enabled=false] to
     [load.balancing.driver.nginx.listen.endpoint.all.interfaces.enabled=true]]
   ```
6. Configure your router's IP address and ports so that incoming API requests resolve to the IPv6 address/ports. Note that incoming API requests must be sent from IPv6 enabled clients.
7. Test your configuration by making an API request to your Router's IPv6 address and port.