# Attach Interface
On virtual machines in the Service Portal AI portal, you can attach or detach VPC interfaces and ports used by the virtual machine by specifying the IP address that the instance will use.
To attach a VPC interface, make sure that you have already created a VPC. For VPC creation steps, refer to the **VPC Network** section. Below are the steps to attach a VPC-based interface to a virtual machine:
* On the Service Portal AI page, select the **Instance** menu in **Deka Flexi**.
* Click **More** then click **Attach Interface** button in the **Action** column.
* You can choose to attach the interface **by Port** or **by VPC**.
* **By VPC**\
If you choose **By VPC**, you must select the VPC and enter the IP address that the instance will use.
* **By Port**\
If you choose **By Port** but no port is available, you can create a port in the VPC. Refer to the **Add Port** sub-chapter for more details.
* After filling in all the required fields, click the **Attach** button. A notification will appear: **"Attach interface has successfully"**
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