# CfnVPC

Specifies a virtual private cloud (VPC).

A VPC must have an associated IPv4 CIDR block. You can specify an IPv4 CIDR block or an IPAM-allocated IPv4 CIDR block. To associate an IPv6 CIDR block with the VPC, see [AWS::EC2::VPCCidrBlock](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-vpccidrblock.html) .

For more information, see [Virtual private clouds (VPC)](https://docs.aws.amazon.com/vpc/latest/userguide/configure-your-vpc.html) in the *Amazon VPC User Guide* .

Extends: Construct › CfnElement › CfnRefElement › CfnResource › CfnVPC
Implements: IInspectable, ITaggable, IEnvironmentAware, IVPCRef, IConstruct, IDependable

- CloudFormation: [`AWS::EC2::VPC`](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/aws-resource-ec2-vpc.html)
- Source: Generated code
- Type last changed: v2.264.0 · 10 Aug 2026

## Example

```ts
declare const cfnTemplate: cfn_inc.CfnInclude;

// using from*Name()
const cfnBucket = cfnTemplate.getResource('Bucket') as s3.CfnBucket;
const bucket = s3.Bucket.fromBucketName(this, 'L2Bucket', cfnBucket.ref);

// using from*Arn()
const cfnKey = cfnTemplate.getResource('Key') as kms.CfnKey;
const key = kms.Key.fromKeyArn(this, 'L2Key', cfnKey.attrArn);

// using from*Attributes()
declare const privateCfnSubnet1: ec2.CfnSubnet;
declare const privateCfnSubnet2: ec2.CfnSubnet;
const cfnVpc = cfnTemplate.getResource('Vpc') as ec2.CfnVPC;
const vpc = ec2.Vpc.fromVpcAttributes(this, 'L2Vpc', {
  vpcId: cfnVpc.ref,
  availabilityZones: core.Fn.getAzs(),
  privateSubnetIds: [privateCfnSubnet1.ref, privateCfnSubnet2.ref],
});
```

## Initializer

```ts
new CfnVPC(scope: Construct, id: string, props?: CfnVPCProps)
```

## Construct Props

- `cidrBlock`: string — The IPv4 network range for the VPC, in CIDR notation.

  For example, `10.0.0.0/16` . We modify the specified CIDR block to its canonical form; for example, if you specify `100.68.0.18/18` , we modify it to `100.68.0.0/18` .

  You must specify either `CidrBlock` or `Ipv4IpamPoolId` .

- `enableDnsHostnames`: boolean | [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) — Indicates whether the instances launched in the VPC get DNS hostnames.

  If enabled, instances in the VPC get DNS hostnames; otherwise, they do not. Disabled by default for nondefault VPCs. For more information, see [DNS attributes in your VPC](https://docs.aws.amazon.com/vpc/latest/userguide/vpc-dns.html#vpc-dns-support) .

  You can only enable DNS hostnames if you've enabled DNS support.

- `enableDnsSupport`: boolean | [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) — Indicates whether the DNS resolution is supported for the VPC.

  If enabled, queries to the Amazon provided DNS server at the 169.254.169.253 IP address, or the reserved IP address at the base of the VPC network range "plus two" succeed. If disabled, the Amazon provided DNS service in the VPC that resolves public DNS hostnames to IP addresses is not enabled. Enabled by default. For more information, see [DNS attributes in your VPC](https://docs.aws.amazon.com/vpc/latest/userguide/vpc-dns.html#vpc-dns-support) .

- `instanceTenancy`: string — The allowed tenancy of instances launched into the VPC.

  - `default` : An instance launched into the VPC runs on shared hardware by default, unless you explicitly specify a different tenancy during instance launch.
  - `dedicated` : An instance launched into the VPC runs on dedicated hardware by default, unless you explicitly specify a tenancy of `host` during instance launch. You cannot specify a tenancy of `default` during instance launch.

  Updating `InstanceTenancy` requires no replacement only if you are updating its value from `dedicated` to `default` . Updating `InstanceTenancy` from `default` to `dedicated` requires replacement.

- `ipv4IpamPoolId`: string — The ID of an IPv4 IPAM pool you want to use for allocating this VPC's CIDR.

  For more information, see [What is IPAM?](https://docs.aws.amazon.com//vpc/latest/ipam/what-is-it-ipam.html) in the *Amazon VPC IPAM User Guide* .

  You must specify either `CidrBlock` or `Ipv4IpamPoolId` .

- `ipv4NetmaskLength`: number — The netmask length of the IPv4 CIDR you want to allocate to this VPC from an Amazon VPC IP Address Manager (IPAM) pool.

  For more information about IPAM, see [What is IPAM?](https://docs.aws.amazon.com//vpc/latest/ipam/what-is-it-ipam.html) in the *Amazon VPC IPAM User Guide* .

- `tags`: [CfnTag](/cdk/api/v2/docs/aws-cdk-lib.CfnTag.html)[] — The tags for the VPC.

- `vpcEncryptionControl`: [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) | [CfnVPC.VpcEncryptionControlProperty](/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.CfnVPC.VpcEncryptionControlProperty.html) — Describes the configuration and state of VPC encryption controls.

  For more information, see [Enforce VPC encryption in transit](https://docs.aws.amazon.com/vpc/latest/userguide/vpc-encryption-controls.html) in the *Amazon VPC User Guide*.

## Properties

- `attrCidrBlock`: string — The primary IPv4 CIDR block for the VPC.

  For example, 10.0.0.0/16.

- `attrCidrBlockAssociations`: string[] — The association IDs of the IPv4 CIDR blocks for the VPC.

  For example, [ vpc-cidr-assoc-0280ab6b ].

- `attrDefaultNetworkAcl`: string — The ID of the default network ACL for the VPC.

  For example, acl-814dafe3.

- `attrDefaultSecurityGroup`: string — The ID of the default security group for the VPC.

  For example, sg-b178e0d3.

- `attrIpv6CidrBlocks`: string[] — The IPv6 CIDR blocks for the VPC.

  For example, [ 2001:db8:1234:1a00::/56 ].

- `attrVpcEncryptionControlResourceExclusions`: [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) — Describes the exclusion configurations for various resource types in VPC Encryption Control.

  For more information, see [Enforce VPC encryption in transit](https://docs.aws.amazon.com/vpc/latest/userguide/vpc-encryption-controls.html) in the *Amazon VPC User Guide*.

- `attrVpcEncryptionControlResourceExclusionsEgressOnlyInternetGateway`: [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) — Describes an exclusion configuration for VPC Encryption Control.

  For more information, see [Enforce VPC encryption in transit](https://docs.aws.amazon.com/vpc/latest/userguide/vpc-encryption-controls.html) in the *Amazon VPC User Guide*.

- `attrVpcEncryptionControlResourceExclusionsEgressOnlyInternetGatewayState`: string — The current state of the exclusion configuration.

- `attrVpcEncryptionControlResourceExclusionsEgressOnlyInternetGatewayStateMessage`: string — A message providing additional information about the exclusion state.

- `attrVpcEncryptionControlResourceExclusionsElasticFileSystem`: [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) — Describes an exclusion configuration for VPC Encryption Control.

  For more information, see [Enforce VPC encryption in transit](https://docs.aws.amazon.com/vpc/latest/userguide/vpc-encryption-controls.html) in the *Amazon VPC User Guide*.

- `attrVpcEncryptionControlResourceExclusionsElasticFileSystemState`: string — The current state of the exclusion configuration.

- `attrVpcEncryptionControlResourceExclusionsElasticFileSystemStateMessage`: string — A message providing additional information about the exclusion state.

- `attrVpcEncryptionControlResourceExclusionsInternetGateway`: [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) — Describes an exclusion configuration for VPC Encryption Control.

  For more information, see [Enforce VPC encryption in transit](https://docs.aws.amazon.com/vpc/latest/userguide/vpc-encryption-controls.html) in the *Amazon VPC User Guide*.

- `attrVpcEncryptionControlResourceExclusionsInternetGatewayState`: string — The current state of the exclusion configuration.

- `attrVpcEncryptionControlResourceExclusionsInternetGatewayStateMessage`: string — A message providing additional information about the exclusion state.

- `attrVpcEncryptionControlResourceExclusionsLambda`: [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) — Describes an exclusion configuration for VPC Encryption Control.

  For more information, see [Enforce VPC encryption in transit](https://docs.aws.amazon.com/vpc/latest/userguide/vpc-encryption-controls.html) in the *Amazon VPC User Guide*.

- `attrVpcEncryptionControlResourceExclusionsLambdaState`: string — The current state of the exclusion configuration.

- `attrVpcEncryptionControlResourceExclusionsLambdaStateMessage`: string — A message providing additional information about the exclusion state.

- `attrVpcEncryptionControlResourceExclusionsNatGateway`: [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) — Describes an exclusion configuration for VPC Encryption Control.

  For more information, see [Enforce VPC encryption in transit](https://docs.aws.amazon.com/vpc/latest/userguide/vpc-encryption-controls.html) in the *Amazon VPC User Guide*.

- `attrVpcEncryptionControlResourceExclusionsNatGatewayState`: string — The current state of the exclusion configuration.

- `attrVpcEncryptionControlResourceExclusionsNatGatewayStateMessage`: string — A message providing additional information about the exclusion state.

- `attrVpcEncryptionControlResourceExclusionsVirtualPrivateGateway`: [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) — Describes an exclusion configuration for VPC Encryption Control.

  For more information, see [Enforce VPC encryption in transit](https://docs.aws.amazon.com/vpc/latest/userguide/vpc-encryption-controls.html) in the *Amazon VPC User Guide*.

- `attrVpcEncryptionControlResourceExclusionsVirtualPrivateGatewayState`: string — The current state of the exclusion configuration.

- `attrVpcEncryptionControlResourceExclusionsVirtualPrivateGatewayStateMessage`: string — A message providing additional information about the exclusion state.

- `attrVpcEncryptionControlResourceExclusionsVpcLattice`: [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) — Describes an exclusion configuration for VPC Encryption Control.

  For more information, see [Enforce VPC encryption in transit](https://docs.aws.amazon.com/vpc/latest/userguide/vpc-encryption-controls.html) in the *Amazon VPC User Guide*.

- `attrVpcEncryptionControlResourceExclusionsVpcLatticeState`: string — The current state of the exclusion configuration.

- `attrVpcEncryptionControlResourceExclusionsVpcLatticeStateMessage`: string — A message providing additional information about the exclusion state.

- `attrVpcEncryptionControlResourceExclusionsVpcPeering`: [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) — Describes an exclusion configuration for VPC Encryption Control.

  For more information, see [Enforce VPC encryption in transit](https://docs.aws.amazon.com/vpc/latest/userguide/vpc-encryption-controls.html) in the *Amazon VPC User Guide*.

- `attrVpcEncryptionControlResourceExclusionsVpcPeeringState`: string — The current state of the exclusion configuration.

- `attrVpcEncryptionControlResourceExclusionsVpcPeeringStateMessage`: string — A message providing additional information about the exclusion state.

- `attrVpcEncryptionControlState`: string — The current state of the VPC Encryption Control configuration.

- `attrVpcEncryptionControlStateMessage`: string — A message providing additional information about the encryption control state.

- `attrVpcEncryptionControlVpcEncryptionControlId`: string — The ID of the VPC Encryption Control configuration.

- `attrVpcEncryptionControlVpcId`: string — The ID of the VPC associated with the encryption control configuration.

- `attrVpcId`: string — The ID of the VPC.

- `CFN_RESOURCE_TYPE_NAME`: string (static) — The CloudFormation resource type name for this resource class.

- `cfnOptions`: [ICfnResourceOptions](/cdk/api/v2/docs/aws-cdk-lib.ICfnResourceOptions.html) — Options for this resource, such as condition, update policy etc.

- `cfnResourceType`: string — AWS resource type.

- `cidrBlock`: string — The IPv4 network range for the VPC, in CIDR notation.

- `creationStack`: string[]

- `enableDnsHostnames`: boolean | [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) — Indicates whether the instances launched in the VPC get DNS hostnames.

- `enableDnsSupport`: boolean | [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) — Indicates whether the DNS resolution is supported for the VPC.

- `env`: [ResourceEnvironment](/cdk/api/v2/docs/aws-cdk-lib.interfaces.ResourceEnvironment.html)

- `instanceTenancy`: string — The allowed tenancy of instances launched into the VPC.

- `ipv4IpamPoolId`: string — The ID of an IPv4 IPAM pool you want to use for allocating this VPC's CIDR.

- `ipv4NetmaskLength`: number — The netmask length of the IPv4 CIDR you want to allocate to this VPC from an Amazon VPC IP Address Manager (IPAM) pool.

- `logicalId`: string — The logical ID for this CloudFormation stack element.

  The logical ID of the element
  is calculated from the path of the resource node in the construct tree.

  To override this value, use `overrideLogicalId(newLogicalId)`.

- `node`: [Node](/cdk/api/v2/docs/constructs.Node.html) — The tree node.

- `ref`: string — Return a string that will be resolved to a CloudFormation `{ Ref }` for this element.

  If, by any chance, the intrinsic reference of a resource is not a string, you could
  coerce it to an IResolvable through `Lazy.any({ produce: resource.ref })`.

- `stack`: [Stack](/cdk/api/v2/docs/aws-cdk-lib.Stack.html) — The stack in which this element is defined.

  CfnElements must be defined within a stack scope (directly or indirectly).

- `tags`: [TagManager](/cdk/api/v2/docs/aws-cdk-lib.TagManager.html) — Tag Manager which manages the tags for this resource.

- `tagsRaw`: [CfnTag](/cdk/api/v2/docs/aws-cdk-lib.CfnTag.html)[] — The tags for the VPC.

- `vpcEncryptionControl`: [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) | [CfnVPC.VpcEncryptionControlProperty](/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.CfnVPC.VpcEncryptionControlProperty.html) — Describes the configuration and state of VPC encryption controls.

- `vpcRef`: [VPCReference](/cdk/api/v2/docs/aws-cdk-lib.interfaces.aws_ec2.VPCReference.html) — A reference to a VPC resource.

## Methods

- `addDeletionOverride(path: string): void` — Syntactic sugar for `addOverride(path, undefined)`.

  **Parameters**

  - `path` — The path of the value to delete.

- `addDependency(target: CfnResource): void` — Use `addResourceDependency` instead.

  This method has been renamed to `addResourceDependency` to more clearly
  set it apart from `construct.node.addDependency`. See the documentation
  of that function for more details.

- `addDependsOn(target: CfnResource): void` — Use `addResourceDependency` instead.

  This can be used for resources across stacks (or nested stack) boundaries
  and the dependency will automatically be transferred to the relevant scope.

  This method has been renamed to `addResourceDependency`, which makes it
  more clear that this method operates at a different level from the
  construct-level `construct.node.addDependency()` mechanism.

- `addMetadata(key: string, value: any): void` — Add a value to the CloudFormation Resource Metadata.

- `addOverride(path: string, value: any): void` — Adds an override to the synthesized CloudFormation resource.

  To add a
  property override, either use `addPropertyOverride` or prefix `path` with
  "Properties." (i.e. `Properties.TopicName`).

  If the override is nested, separate each nested level using a dot (.) in the path parameter.
  If there is an array as part of the nesting, specify the index in the path.

  To include a literal `.` in the property name, prefix with a `\`. In most
  programming languages you will need to write this as `"\\."` because the
  `\` itself will need to be escaped.

  For example,
  ```typescript
  cfnResource.addOverride('Properties.GlobalSecondaryIndexes.0.Projection.NonKeyAttributes', ['myattribute']);
  cfnResource.addOverride('Properties.GlobalSecondaryIndexes.1.ProjectionType', 'INCLUDE');
  ```
  would add the overrides
  ```json
  "Properties": {
    "GlobalSecondaryIndexes": [
      {
        "Projection": {
          "NonKeyAttributes": [ "myattribute" ]
          ...
        }
        ...
      },
      {
        "ProjectionType": "INCLUDE"
        ...
      },
    ]
    ...
  }
  ```

  The `value` argument to `addOverride` will not be processed or translated
  in any way. Pass raw JSON values in here with the correct capitalization
  for CloudFormation. If you pass CDK classes or structs, they will be
  rendered with lowercased key names, and CloudFormation will reject the
  template.

  **Parameters**

  - `path` — - The path of the property, you can use dot notation to override values in complex types.
  - `value` — - The value.

- `addPropertyDeletionOverride(propertyPath: string): void` — Adds an override that deletes the value of a property from the resource definition.

  **Parameters**

  - `propertyPath` — The path to the property.

- `addPropertyOverride(propertyPath: string, value: any): void` — Adds an override to a resource property.

  Syntactic sugar for `addOverride("Properties.<...>", value)`.

  **Parameters**

  - `propertyPath` — The path of the property.
  - `value` — The value.

- `addResourceDependency(target: CfnResource, reason?: string): void` — Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.

  This can be used for resources across stacks (or nested stack) boundaries
  and the dependency will automatically be transferred to the relevant scope.

  This method only adds dependencies between L1 resources. If you are
  looking for a generic construct-to-construct dependency mechanism that works
  for all constructs including L2s, use `construct.node.addDependency` instead.

- `applyCrossStackReferenceStrength(strength: ReferenceStrength): void` — Sets the cross-stack reference strength for this resource.

  When set, any cross-stack reference to this resource will use the specified
  strength instead of the global default from the consuming stack's context.

  **Parameters**

  - `strength` — - The reference strength to use for this resource.

- `applyRemovalPolicy(policy?: RemovalPolicy, options?: RemovalPolicyOptions): void` — Sets the deletion policy of the resource based on the removal policy specified.

  The Removal Policy controls what happens to this resource when it stops
  being managed by CloudFormation, either because you've removed it from the
  CDK application or because you've made a change that requires the resource
  to be replaced.

  The resource can be deleted (`RemovalPolicy.DESTROY`), or left in your AWS
  account for data recovery and cleanup later (`RemovalPolicy.RETAIN`). In some
  cases, a snapshot can be taken of the resource prior to deletion
  (`RemovalPolicy.SNAPSHOT`). A list of resources that support this policy
  can be found in the following link:

- `arnForVPC(resource: IVPCRef): string` (static)

- `cfnPropertyName(cdkPropertyName: string): string`

- `fromVpcId(scope: Construct, id: string, vpcId: string): IVPCRef` (static) — Creates a new IVPCRef from a vpcId.

- `getAtt(attributeName: string, typeHint?: ResolutionTypeHint): Reference` — Returns a token for an runtime attribute of this resource.

  Ideally, use generated attribute accessors (e.g. `resource.arn`), but this can be used for future compatibility
  in case there is no generated attribute.

  **Parameters**

  - `attributeName` — The name of the attribute.

- `getMetadata(key: string): any` — Retrieve a value value from the CloudFormation Resource Metadata.

- `inspect(inspector: TreeInspector): void` — Examines the CloudFormation resource and discloses attributes.

  **Parameters**

  - `inspector` — tree inspector to collect and process attributes.

- `isCfnElement(x: any): boolean` (static) — Returns `true` if a construct is a stack element (i.e. part of the synthesized cloudformation template).

  Uses duck-typing instead of `instanceof` to allow stack elements from different
  versions of this library to be included in the same stack.

  **Returns:** The construct as a stack element or undefined if it is not a stack element.

- `isCfnResource(x: any): boolean` (static) — Check whether the given object is a CfnResource.

- `isCfnVPC(x: any): boolean` (static) — Checks whether the given object is a CfnVPC.

- `isConstruct(x: any): boolean` (static) — Checks if `x` is a construct.

  Use this method instead of `instanceof` to properly detect `Construct`
  instances, even when the construct library is symlinked.

  Explanation: in JavaScript, multiple copies of the `constructs` library on
  disk are seen as independent, completely different libraries. As a
  consequence, the class `Construct` in each copy of the `constructs` library
  is seen as a different class, and an instance of one class will not test as
  `instanceof` the other class. `npm install` will not create installations
  like this, but users may manually symlink construct libraries together or
  use a monorepo tool: in those cases, multiple copies of the `constructs`
  library can be accidentally installed, and `instanceof` will behave
  unpredictably. It is safest to avoid using `instanceof`, and using
  this type-testing method instead.

  **Parameters**

  - `x` — Any object.

  **Returns:** true if `x` is an object created from a class which extends `Construct`.

- `obtainDependencies(): Stack | CfnResource[]` — Retrieves an array of resources and stacks this resource depends on.

  For resources depended on directly, returns the `CfnResource` object. For
  dependencies on other stacks, returns the `Stack` object. The order of the
  array is not guaranteed.

- `overrideLogicalId(newLogicalId: string): void` — Overrides the auto-generated logical ID with a specific ID.

  **Parameters**

  - `newLogicalId` — The new logical ID to use for this stack element.

- `removeDependency(target: CfnResource): void` — Use `removeResourceDependency` instead

  This can be used for resources across stacks (including nested stacks)
  and the dependency will automatically be removed from the relevant scope.

- `removeResourceDependency(target: CfnResource): void` — Indicates that this resource no longer depends on another resource.

  This can be used for resources across stacks (including nested stacks)
  and the dependency will automatically be removed from the relevant scope.

- `replaceDependency(target: CfnResource, newTarget: CfnResource): void` — Replaces one dependency with another.

  **Parameters**

  - `target` — The dependency to replace.
  - `newTarget` — The new dependency to add.

- `toString(): string` — Returns a string representation of this construct.

  **Returns:** a string representation of this resource

- `with(...mixins: IMixin[]): IConstruct` — Applies one or more mixins to this construct.

  Mixins are applied in order. The list of constructs is captured at the
  start of the call, so constructs added by a mixin will not be visited.
  Use multiple `with()` calls if subsequent mixins should apply to added
  constructs.