With the advent of containers, Kubernetes became the de-facto tool to manage these millions of containers. While IP address is a scarce resource, every last pod in Kubernetes demand its own IP address. From infrastructure design perspective, it presents a challenge. A key aspect of container networking is IP address management, which often gets overlooked. How Kubernetes assigns IP address to pods is determined by the IPAM (IP Address Management) plugin being used. Different IPAM plugins provide different feature sets. This talk throws some light on how some of the open source CNI plugins tackles the challenge of IP exhaustion and approaches IPAM.