> 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/create-ip-transit-ha.md).

# Create an IP Transit HA Instance

Go to **zenConsole → Network → IP Transit**, click **Buy** in the upper-right corner, and follow the steps below.

## Procedures

{% stepper %}
{% step %}

### Enable HA

In the **High Availability (HA)** section on the creation page, turn on the **Enable HA** toggle.

<figure><img src="/files/dCkUfmlgrYdly4NLwJkj" alt=""><figcaption><p>Enable HA toggle</p></figcaption></figure>

Hover over the ⓘ icon to view the description:

* If the primary port fails, traffic automatically switches to the standby port within seconds.
* An HA instance requires two co-located ports.
  {% endstep %}

{% step %}

### Select an Operating Mode

Under **HA Operating Mode**, select one of the following:

* **Active-Standby**: The primary port carries all traffic and switches to the standby port within seconds on failure. Best for workloads requiring deterministic routing paths.
* **Active-Active**: Both links forward traffic simultaneously using ECMP, maximizing bandwidth utilization.

<figure><img src="/files/zoJmgon89mfDswvq6pUI" alt=""><figcaption><p>Select an operating mode</p></figcaption></figure>
{% endstep %}

{% step %}

### Configure Ports

In the **Select Ports** section, select ports and configure VLANs:

1. Select the first port. The system automatically designates it as the **primary port**.
2. Select the second port. The system filters the list to **show only ports in the same city as the primary port**; ports in other cities are grayed out.
3. Enter a **VLAN ID** for each port (using the same VLAN ID for both is recommended).

<figure><img src="/files/sJHYWP8GZd8SCpSUXyYl" alt=""><figcaption><p>Select ports and configure VLAN IDs</p></figcaption></figure>
{% endstep %}

{% step %}

### Configure IP Transit Parameters

Fill in the following parameters:

* **Target region**
* **IP stack**: IPv4 / IPv6 / Dual-stack
* **IP type and address block size**
* **Billing model**: Flat Rate or Burstable 95th
* **Bandwidth specification**: Both links are configured with the same specification

<figure><img src="/files/MkcT3HGgTzqyKw3t0JSp" alt=""><figcaption><p>Configure IP Transit parameters</p></figcaption></figure>
{% endstep %}

{% step %}

### Confirm and Place the Order

Review the order summary (the system generates a single unified order covering both port resources) and click **Buy Now** to complete payment.

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

<mark style="color:blue;">If either port fails to provision after the order is submitted, the system automatically rolls back the entire order and reports a creation failure.</mark>
{% endhint %}
{% endstep %}
{% endstepper %}

## What to Do Next

After creation, the HA instance appears in the IP Transit list with an **HA badge**. Go to the instance details page to view traffic monitoring, port status, and the current operating mode.

See [View HA Instance](/welcome/ip-transit/high-availability/manage-high-availability/view-ha-instance.md) for details.