# IpProtocol

The types of IP addresses provisioned in the VPC.

- Source: [`aws-ec2/lib/vpc.ts`](https://github.com/aws/aws-cdk/blob/v2.275.0/packages/aws-cdk-lib/aws-ec2/lib/vpc.ts#L230)
- Type last changed: v2.121.0 · 12 Jan 2024

## Example

```ts
import * as elbv2 from 'aws-cdk-lib/aws-elasticloadbalancingv2';

// The VPC and subnet must have associated IPv6 CIDR blocks.
const vpc = new ec2.Vpc(this, 'Vpc', {
  ipProtocol: ec2.IpProtocol.DUAL_STACK,
});
const cluster = new ecs.Cluster(this, 'EcsCluster', { vpc });

const service = new ecsPatterns.ApplicationLoadBalancedFargateService(this, 'myService', {
  cluster,
  taskImageOptions: {
    image: ecs.ContainerImage.fromRegistry('amazon/amazon-ecs-sample'),
  },
  minHealthyPercent: 100,
  ipAddressType: elbv2.IpAddressType.DUAL_STACK,
});

const applicationLoadBalancedEc2Service = new ecsPatterns.ApplicationLoadBalancedEc2Service(this, 'myService', {
  cluster,
  taskImageOptions: {
    image: ecs.ContainerImage.fromRegistry('amazon/amazon-ecs-sample'),
  },
  minHealthyPercent: 100,
  ipAddressType: elbv2.IpAddressType.DUAL_STACK,
});
```

## Members

| Member | Description |
| --- | --- |
| `IPV4_ONLY` | The vpc will be configured with only IPv4 addresses. |
| `DUAL_STACK` | The vpc will have both IPv4 and IPv6 addresses. |

## Referenced by

- [`VpcProps`](/v2/docs/aws-cdk-lib.aws_ec2.VpcProps).ipProtocol