Fixing EIP Limit Issue
Question
Your system automatically provisions EIPs to new EC2 instances.
On your new AWS account, your attempt to create a Production environment failed, after successfully creating the Development and Staging environments in the same region.
It seems that the number of EIPs hit the limit.
How would you fix the problem?
Answers
Explanations
Click on the arrows to vote for the correct answer
A. B. C. D.Answer - C.
Option A is incorrect.
Although you can check the EIP limits in AWS Trusted Advisor, you cannot increase its limit through the AWS Trusted Advisor portal.
Option B is incorrect.
Although this method is possible, it is easier and is the method suggested by AWS.
Option C is CORRECT because you can fill in the form in AWS Service Quotas to request the increase of the EIP limit.
Option D is incorrect because the EIP limit can be adjusted as option.
C.
For more information on Elastic IP limit, please visit the below URL:
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/elastic-ip-addresses-eip.html#using-instance-addressing-limitThe correct answer to this question is C: Request a quota increase for the Elastic IPs directly from the AWS Service Quotas console.
Explanation: AWS allows a certain number of Elastic IP addresses (EIPs) to be created per AWS account, based on the region where the EIPs are being created. This limit is in place to prevent resource exhaustion and to ensure fair usage among AWS customers. By default, AWS allows only five EIPs per region, and the limit can be increased by requesting a quota increase.
When the number of EIPs hits the limit, it is not possible to create any more EIPs for that region, which can cause problems when provisioning new EC2 instances. In this scenario, the Production environment could not be created due to a lack of available EIPs.
Option A, checking the usage of EIPs in AWS Trusted Advisor and increasing the limit from 5 to 100 through the AWS Trusted Advisor portal, is incorrect because AWS Trusted Advisor does not provide an option to increase EIP limits. It only provides recommendations for improving cost optimization, security, and performance.
Option B, raising a ticket to AWS support to increase the EC2 EIP limit from 5 to 30, is incorrect because the default limit for EIPs is already 5, not 30. Additionally, the limit can be increased beyond 30, and raising a support ticket is not the recommended way to do it.
Option D, modifying EIPs to public or private IPs in the script, is incorrect because EIPs are required for EC2 instances to communicate with the internet. Changing the EIPs to public or private IPs would affect the ability of the instances to communicate with the internet, and this is not a solution to the problem.
The recommended solution is to request a quota increase for the Elastic IPs directly from the AWS Service Quotas console. To do this, log in to the AWS Management Console, go to the AWS Service Quotas console, select Elastic IP addresses, and then click Request quota increase. In the request form, specify the desired new limit and provide a justification for the increase. AWS will review the request and either approve or deny it.
