AWS VPC CNI Version 1.5.0 Now Default for Amazon EKS Clusters

Version 1.5 of the AW VPC CNI plugin improves the behavior of the WARM_IP_TARGET parameter so that any IPs not assigned to pods will be returned back to the subnet. This lowers overall IP address utilization across the cluster. Additionally, a number of bug fixes improve the overall reliability and performance of the CNI for Amazon EKS clusters. 



https://aws.amazon.com/about-aws/whats-new/2019/07/aws-vpc-cni-version-150-now-default-for-amazon-eks-clusters/