# Configure ENA Express settings for your EC2 instance
You can configure ENA Express for supported EC2 instance types without needing to install any additional software. For more information, see [Supported instance types for ENA Express](ena-express.md#ena-express-supported-instance-types).
------
#### [ Console ]
**To manage ENA Express for a network interface**
1. Open the Amazon EC2 console at [https://console.aws.amazon.com/ec2/](https://console.aws.amazon.com/ec2/).
1. In the left navigation pane, choose **Network interfaces**.
1. Select a network interface that is attached to an instance. You can choose the **Network interface ID** link to open the detail page, or you can select the checkbox on the left side of the list.
1. Choose **Manage ENA Express** from the **Action** menu at the top right side of the page. This opens the **Manage ENA Express** dialog, with the selected network interface ID and current settings displayed.
If the network interface you selected is not attached to an instance, this action does not appear in the menu.
1. To use **ENA Express**, select the **Enable** checkbox.
1. When ENA Express is enabled, you can configure UDP settings. To use **ENA Express UDP**, select the **Enable** checkbox.
1. To save your settings, choose **Save**.
**To manage ENA Express for an instance**
1. Open the Amazon EC2 console at [https://console.aws.amazon.com/ec2/](https://console.aws.amazon.com/ec2/).
1. In the left navigation pane, choose **Instances**.
1. Select the instance that you want to manage. You can choose the **Instance ID** to open the detail page, or you can select the checkbox on the left side of the list.
1. Select the **Network interface** to configure for your instance.
1. Choose **Manage ENA Express** from the **Action** menu at the top right side of the page.
1. To configure ENA Express for a network interface that's attached to your instance, select it from the **Network interface** list.
1. To use **ENA Express** for the selected network interface attachment, select the **Enable** checkbox.
1. When ENA Express is enabled, you can configure UDP settings. To use **ENA Express UDP**, select the **Enable** checkbox.
1. To save your settings, choose **Save**.
**To configure ENA Express when you attach a network interface**
1. Open the Amazon EC2 console at [https://console.aws.amazon.com/ec2/](https://console.aws.amazon.com/ec2/).
1. In the left navigation pane, choose **Network interfaces**.
1. Select a network interface that is not attached to an instance (**Status** is **Available**). You can choose the **Network interface ID** link to open the detail page, or you can select the checkbox on the left side of the list.
1. Select the **Instance** that you'll attach to.
1. To use **ENA Express** after you attach the network interface to the instance, select the **Enable** checkbox.
1. When ENA Express is enabled, you can configure UDP settings. To use **ENA Express UDP**, select the **Enable** checkbox.
1. To attach the network interface to the instance and save your ENA Express settings, choose **Attach**.
------
#### [ AWS CLI ]
**To configure ENA Express when you attach a network interface**
Use the [https://docs.aws.amazon.com/cli/latest/reference/;attach-network-interface.html](https://docs.aws.amazon.com/cli/latest/reference/;attach-network-interface.html) command, as shown in the following examples.
**Example 1: Use ENA Express for TCP traffic, but not UDP traffic**
This example configures `EnaSrdEnabled` as `true`, and allows `EnaSrdUdpEnabled` to default to `false`.
```
aws ec2 attach-network-interface \
--network-interface-id eni-1234567890abcdef0 \
--instance-id i-1234567890abcdef0 \
--device-index 1 \
--ena-srd-specification 'EnaSrdEnabled=true'
```
**Example 2: Use ENA Express for both TCP traffic and UDP traffic**
This example configures both `EnaSrdEnabled` and `EnaSrdUdpEnabled` as `true`.
```
aws ec2 attach-network-interface \
--network-interface-id eni-1234567890abcdef0 \
--instance-id i-1234567890abcdef0 \
--device-index 1 \
--ena-srd-specification 'EnaSrdEnabled=true,EnaSrdUdpSpecification={EnaSrdUdpEnabled=true}'
```
**To update ENA Express settings for a network interface attachment**
Use the [https://docs.aws.amazon.com/cli/latest/reference/modify-network-interface-attribute.html](https://docs.aws.amazon.com/cli/latest/reference/modify-network-interface-attribute.html) command as shown in the following examples.
**Example 1: Use ENA Express for TCP traffic, but not UDP traffic**
This example configures `EnaSrdEnabled` as `true`, and allows `EnaSrdUdpEnabled` to default to `false` if it has never been set previously.
```
aws ec2 modify-network-interface-attribute \
--network-interface-id eni-1234567890abcdef0 \
--ena-srd-specification 'EnaSrdEnabled=true'
```
**Example 2: Use ENA Express for both TCP traffic and UDP traffic**
This example configures both `EnaSrdEnabled` and `EnaSrdUdpEnabled` as `true`.
```
aws ec2 modify-network-interface-attribute \
--network-interface-id eni-1234567890abcdef0 \
--ena-srd-specification 'EnaSrdEnabled=true,EnaSrdUdpSpecification={EnaSrdUdpEnabled=true}'
```
**Example 3: Stop using ENA Express for UDP traffic**
This example configures `EnaSrdUdpEnabled` as `false`.
```
aws ec2 modify-network-interface-attribute \
--network-interface-id eni-1234567890abcdef0 \
--ena-srd-specification 'EnaSrdUdpSpecification={EnaSrdUdpEnabled=false}'
```
------
#### [ PowerShell ]
**To configure ENA Express when you attach a network interface**
Use the [https://docs.aws.amazon.com/powershell/latest/reference/items/Add-EC2NetworkInterface.html](https://docs.aws.amazon.com/powershell/latest/reference/items/Add-EC2NetworkInterface.html) cmdlet as shown in the following examples.
**Example 1: Use ENA Express for TCP traffic, but not UDP traffic**
This example configures `EnaSrdEnabled` as `true`, and allows `EnaSrdUdpEnabled` to default to `false`.
```
Add-EC2NetworkInterface `
-NetworkInterfaceId eni-1234567890abcdef0 `
-InstanceId i-1234567890abcdef0 `
-DeviceIndex 1 `
-EnaSrdSpecification_EnaSrdEnabled $true
```
**Example 2: Use ENA Express for both TCP traffic and UDP traffic**
This example configures both `EnaSrdEnabled` and `EnaSrdUdpEnabled` as `true`.
```
Add-EC2NetworkInterface `
-NetworkInterfaceId eni-1234567890abcdef0 `
-InstanceId i-1234567890abcdef0 `
-DeviceIndex 1 `
-EnaSrdSpecification_EnaSrdEnabled $true `
-EnaSrdUdpSpecification_EnaSrdUdpEnabled $true
```
**To configure ENA Express settings for your network interface attachment**
Use the [https://docs.aws.amazon.com/powershell/latest/reference/items/Edit-EC2NetworkInterfaceAttribute.html](https://docs.aws.amazon.com/powershell/latest/reference/items/Edit-EC2NetworkInterfaceAttribute.html) cmdlet as shown in the following examples.
**Example 1: Use ENA Express for TCP traffic, but not UDP traffic**
This example configures `EnaSrdEnabled` as `true`, and allows `EnaSrdUdpEnabled` to default to `false` if it has never been set previously.
```
Edit-EC2NetworkInterfaceAttribute `
-NetworkInterfaceId eni-1234567890abcdef0 `
-EnaSrdSpecification_EnaSrdEnabled $true ;
Get-EC2NetworkInterface -NetworkInterfaceId eni-0123f4567890a1b23 | `
Select-Object `
NetworkInterfaceId,
@{Name = 'EnaSrdEnabled'; Expression = { $_.Attachment.EnaSrdSpecification.EnaSrdEnabled }},
@{Name = 'EnaSrdUdpEnabled'; Expression = { $_.Attachment.EnaSrdSpecification.EnaSrdUdpSpecification.EnaSrdUdpEnabled }} | `
Format-List
```
**Example 2: Use ENA Express for both TCP traffic and UDP traffic**
This example configures both `EnaSrdEnabled` and `EnaSrdUdpEnabled` as `true`.
```
Edit-EC2NetworkInterfaceAttribute `
-NetworkInterfaceId eni-1234567890abcdef0 `
-EnaSrdSpecification_EnaSrdEnabled $true `
-EnaSrdSpecification_EnaSrdUdpSpecification_EnaSrdUdpEnabled $true ;
Get-EC2NetworkInterface -NetworkInterfaceId eni-1234567890abcdef0 | `
Select-Object `
NetworkInterfaceId,
@{Name = 'EnaSrdEnabled'; Expression = { $_.Attachment.EnaSrdSpecification.EnaSrdEnabled }},
@{Name = 'EnaSrdUdpEnabled'; Expression = { $_.Attachment.EnaSrdSpecification.EnaSrdUdpSpecification.EnaSrdUdpEnabled }} | `
Format-List
```
**Example 3: Stop using ENA Express for UDP traffic**
This example configures `EnaSrdUdpEnabled` as `false`.
```
Edit-EC2NetworkInterfaceAttribute `
-NetworkInterfaceId eni-0123f4567890a1b23 `
-EnaSrdSpecification_EnaSrdUdpSpecification_EnaSrdUdpEnabled $false ;
Get-EC2NetworkInterface -NetworkInterfaceId eni-0123f4567890a1b23 | `
Select-Object `
NetworkInterfaceId,
@{Name = 'EnaSrdEnabled'; Expression = { $_.Attachment.EnaSrdSpecification.EnaSrdEnabled }},
@{Name = 'EnaSrdUdpEnabled'; Expression = { $_.Attachment.EnaSrdSpecification.EnaSrdUdpSpecification.EnaSrdUdpEnabled }} | `
Format-List
```
------
## Configure ENA Express at launch
You can use one of the following methods to configure ENA Express directly when you launch an instance. The specified links refer you to the AWS Management Console instructions for these methods.
+ **Launch instance wizard** – You can configure ENA Express at launch with the launch instance wizard. For more information, see **Advanced network configuration** in the [Network settings](ec2-instance-launch-parameters.md#liw-network-settings) for the launch instance wizard.
+ **Launch template** – You can configure ENA Express at launch when you use a launch template. For more information, see the [Create an Amazon EC2 launch template](create-launch-template.md) page, then expand the **Network settings** section and review the **Advanced network configuration**.