> **Experimental**
>
> `@aws-cdk/aws-ec2-alpha` is an [**experimental**](/stability) (alpha) package: its API may change in any release, without a major version bump.
# SecondaryAddressProps

Additional props needed for secondary Address.

- Stability: [Experimental](/cdk/api/stability.html)
- Source: [`lib/vpc-v2.ts`](https://github.com/aws/aws-cdk/blob/v2.275.0-alpha.0/packages/@aws-cdk/aws-ec2-alpha/lib/vpc-v2.ts#L19)

## Example

```ts
const stack = new Stack();
const myVpc = new VpcV2(this, 'Vpc',{
      primaryAddressBlock: IpAddresses.ipv4('10.1.0.0/16'),
      secondaryAddressBlocks: [IpAddresses.amazonProvidedIpv6({
      cidrBlockName: 'AmazonProvided',
    })]
    });

const eigw = new EgressOnlyInternetGateway(this, 'EIGW', {
  vpc: myVpc,
});

const routeTable = new RouteTable(this, 'RouteTable', {
  vpc: myVpc,
});

routeTable.addRoute('EIGW', '::/0', { gateway: eigw });
```

## Properties

- `cidrBlockName`: string (required) — Required to set Secondary cidr block resource name in order to generate unique logical id for the resource.