> For the complete documentation index, see [llms.txt](https://docs.console.zenlayer.com/welcome/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.console.zenlayer.com/welcome/ip-transit/high-availability/manage-high-availability/change-ha-mode.md).

# Change HA Mode

You can switch between **Active-Standby** and **Active-Active** at any time. The change takes effect immediately and does not affect service availability.

## Procedures

Access the change from either of the following locations:

* **Option 1**: On the list page, hover over the instance row → **⋯** menu → **Change HA Mode**
* **Option 2**: On the instance details page → **Mode Configuration** → **Change**

<figure><img src="/files/zaWbgrA9bzQY68dvdBC9" alt=""><figcaption><p>Change HA Mode entry points</p></figcaption></figure>

In the dialog, select the target mode:

| Mode               | Description                                                                                                                                       |
| ------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Active-Standby** | The primary port carries all traffic and fails over to the standby port within seconds. Best for workloads requiring deterministic routing paths. |
| **Active-Active**  | Both L2 links forward traffic simultaneously using ECMP for higher availability and throughput.                                                   |

<figure><img src="/files/dJU9QB9uLCAt0218I8rD" alt=""><figcaption><p>Select the target HA mode</p></figcaption></figure>

Click **Confirm**. The change takes effect immediately.

{% hint style="info" %} <mark style="color:blue;">**Tip**</mark>

<mark style="color:blue;">Switching HA modes does not affect service connectivity. There is no service interruption during the change.</mark>
{% endhint %}