NAT Gateway:CreateNatIpCidr

The region ID of the NAT gateway with which you want to associate the CIDR block.

You can call the DescribeRegions operation to query the most recent region list.

The ID of the Virtual Private Cloud (VPC) NAT gateway with which you want to associate the CIDR block.

The name of the CIDR block.

The name must be 2 to 128 characters in length, and can contain letters, digits, periods (.), underscores (_), and hyphens (-). It must start with a letter. The name must start with a letter and cannot start with http:// or https://.

The description of the NAT CIDR block.

The description must be 2 to 256 characters in length and start with a letter. The description cannot start with http:// or https://.

Specifies whether to perform only a dry run, without performing the actual request. Valid values:

• true: performs only a dry run. The system checks the request for potential issues, including missing parameter values, incorrect request syntax, and service limits. If the request fails the dry run, an error message is returned. If the request passes the dry run, the DryRunOperation error code is returned.
• false(default): performs a dry run and performs the actual request. If the request passes the dry run, a 2xx HTTP status code is returned and the operation is performed.

The client token that is used to ensure the idempotence of the request.

You can use the client to generate the token, but you must make sure that the token is unique among different requests. The client token can contain only ASCII characters.

The NAT CIDR block that you want to associate with the NAT gateway.

The new CIDR block must meet the following conditions:

• The NAT CIDR block must fall within 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, or their subnets.
• The subnet mask must be 16 to 32 bits in length.
• The NAT CIDR block cannot overlap with the private CIDR block of the VPC to which the NAT gateway belongs. If you want to use other IP addresses from the private CIDR block of the VPC to provide NAT services, create a vSwitch and attach the vSwitch to another VPC NAT gateway.
• If you want to use public IP addresses to provide NAT services, make sure that the public IP addresses fall within a customer CIDR block of the VPC to which the VPC NAT gateway belongs. For more information, see What is customer CIDR block?.