AWS::EC2::SubnetCidrBlock - Amazon CloudFormation
SyntaxPropertiesReturn values
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

AWS::EC2::SubnetCidrBlock

Associates a CIDR block with your subnet. You can associate a single IPv6 CIDR block with your subnet. An IPv6 CIDR block must have a prefix length of /64.

Syntax

To declare this entity in your Amazon CloudFormation template, use the following syntax:

JSON

{
  "Type" : "AWS::EC2::SubnetCidrBlock",
  "Properties" : {
      "Ipv6CidrBlock" : String,
      "SubnetId" : String
    }
}

YAML

Type: AWS::EC2::SubnetCidrBlock
Properties: 
  Ipv6CidrBlock: String
  SubnetId: String

Properties

Ipv6CidrBlock

The IPv6 network range for the subnet, in CIDR notation. The subnet size must use a /64 prefix length.

This parameter is required for an IPv6 only subnet.

Required: Yes

Type: String

Update requires: Replacement

SubnetId

The ID of the subnet.

Required: Yes

Type: String

Update requires: Replacement

Return values

Ref

When you pass the logical ID of this resource to the intrinsic Reffunction, Refreturns the association ID for the subnet’s IPv6 CIDR block.

For more information about using the Reffunction, see Ref.