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

Interface to create L2 for VPC Cidr Block.

- Stability: [Experimental](/cdk/api/stability.html)
- Source: [`lib/vpc-v2.ts`](https://github.com/aws/aws-cdk/blob/v2.274.0-alpha.0/packages/@aws-cdk/aws-ec2-alpha/lib/vpc-v2.ts#L705)

## Properties

- `amazonProvidedIpv6CidrBlock`: boolean — Amazon Provided Ipv6.

- `cidrBlock`: string — The secondary IPv4 CIDR Block.

  **Default:** no CIDR block provided

- `ipv4IpamPoolId`: string — IPAM pool for IPv4 address type.

- `ipv6CidrBlock`: string — The IPv6 CIDR block from the specified IPv6 address pool.

- `ipv6IpamPoolId`: string — IPAM pool for IPv6 address type.

- `ipv6Pool`: string — The ID of the IPv6 address pool from which to allocate the IPv6 CIDR block.