Determine if the number of EC2-Classic Elastic IPs (EIPs) allocated per region is close to the limit number established by Amazon for accounts that support EC2-Classic platform and request limit increase in order to avoid encountering IP resource limitations on future EC2 provisioning sessions. As the IPv4 public IP addresses are a scarce resource nowadays, by default, all AWS accounts are limited to 5 (five) Elastic IP addresses per region.
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Monitoring your EC2-Classic Elastic IP (EIP) limits will help you avoid public IP resources starvation in case you need to expand rapidly your AWS EC2-Classic infrastructure.
For AWS accounts that support EC2-Classic platform, Amazon sets automatically a fixed limit of 5 for the number of Elastic IPs available per region. To determine if your account has reached the default EIP limit, perform the following:
Remediation / Resolution
To request an increase for the EC2-Classic Elastic IP limit, perform the following:Note: Requesting to increase the limit for the number of Elastic IPs per region using the AWS API via Command Line Interface (CLI) is not currently supported.
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EC2-Classic Elastic IP Address Limit Checkup
Risk level: Medium