Identify and delete any unused Amazon AWS Elastic Network Interfaces in order to adhere to best practices and to avoid reaching the service limit. An AWS Elastic Network Interface (ENI) is pronounced unused when is not attached anymore to an EC2 instance.
As good practice, unused (detached) Amazon Elastic Network Interfaces should be removed from your account because keeping a lot of unused ENIs can exhaust the resource limit and eventually prevent the launching of new EC2 instances.
To identify any unused Elastic Network Interfaces currently available within your AWS account, perform the following:
To remove any unused Amazon Elastic Network Interfaces (ENIs) available within your AWS account, perform the following: