If you no longer wish to be charged for IPAM, simply delete your IPAM using the AWS Management Console, AWS Command Line Interface, or API. IPAM will still track the IP addresses (assignments, overlaps, etc.) and charge you for the active IP addresses. For example, you may have created ENIs with IP addresses in the past that do not belong to an existing IPAM pool. IPAM tracks and monitors all the IP addresses assigned to resources in your VPCs, even if they are not part of an IPAM IP address pool. Also, if you have assigned a /28 IPv4 prefix or /80 IPv6 prefix to an ENI, IPAM will consider it as a single active address attachment and only charge you for the single unit. IPAM will consider only 2,000 IP addresses as active and will only charge you for those. For example, you have a VPC with a /16 CIDR (65,536 IPv4 addresses) assigned to it, out of which you have assigned only 2,000 IP addresses to resources such as ENIs.
An active IP address is defined as an IP address or a prefix assigned to a resource such as an EC2 instance or an Elastic Network Interface (ENI). You pay an hourly rate for each active IP address that you manage using IP Address Manager (IPAM). There will be data transfer charges between your NAT gateway and EC2 instance if they are in a different Availability Zone. There was also no charge for the data transfer between the NAT gateway and the EC2 instance since the traffic stays in the same Availability Zone using private IP addresses. There was no charge for the data transfer from the EC2 instance to S3, as it is Data Transfer Out to Amazon EC2 to S3 in the same region. 1 GB data was transferred from the EC2 instance to S3 via the NAT gateway. Data Transfer Charge: This is the standard EC2 Data Transfer charge.The Data Processing charge will result in a charge of $0.045. NAT Gateway Data Processing Charge: 1 GB data went through the NAT gateway.For this region, the rate is $0.045 per hour. NAT Gateway Hourly Charge: NAT Gateway is charged on an hourly basis.If you don’t consider these at the outset, you might find yourself with a nasty surprise when your first invoice rolls in. The EC2 instance, NAT gateway, and S3 Bucket are in the same region of the US East (Ohio), and the NAT gateway and EC2 instance are in the same Availability Zone. AWS Data transfer pricing is critical to cloud cost management While many businesses focus on computing and storage requirements, data transfer charges can be a hefty portion of your monthly spending on the cloud. Let’s assume you created a NAT gateway and you have an EC2 instance routing to the internet through the NAT gateway. Your EC2 instance behind the NAT gateway sends a 1 GB file to one of your Amazon Simple Storage Service (Amazon S3) buckets.
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