In this second part of the blog series on IPv6 for Amazon EKS, various communication patterns for IPv6 pods to interact with IPv4 endpoints are explored, including built-in interoperability features provided by Amazon VPC CNI and the use of dual-stack load balancers as an interoperability layer.

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<p>The article discusses the implementation patterns for IPv6 support on Amazon Elastic Kubernetes Service (Amazon EKS). It explores how Pods in IPv6 EKS clusters interact and interoperate with IPv4 networks and services.</p>
<p>Specifically, the article covers:</p>
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<li>Communication patterns within an EKS/IPv6 cluster (Pod to Pod, Pod to Kubernetes service)</li>
<li>Outbound communication from an EKS/IPv6 Pod to IPv4 endpoints outside the cluster, facilitated by the Amazon VPC CNI plugin's built-in interoperability layer</li>
<li>Inbound communication from internet-based IPv4 endpoints to load-balanced EKS/IPv6 Pods, enabled by using dual-stack AWS Load Balancer Controller (LBC) with specific annotations</li>
<li>Conclusion that the built-in interoperability layer allows gradual migration of workloads to IPv6 EKS clusters while IPv6 support is being added to other services</li>
</ul>
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