Amazon MSK now supports dual-stack (IPv4 and IPv6) connectivity for existing clusters

Amazon Managed Streaming for Apache Kafka ([Amazon MSK](https://aws.amazon.com/msk/)) now supports dual-stack connectivity (IPv4 and IPv6) for existing MSK Provisioned and MSK Serverless clusters. This capability enables customers to connect to Amazon MSK using both IPv4 and IPv6 protocols, in addition to the existing IPv4-only option. It helps customers modernize applications for IPv6 environments while maintaining IPv4 compatibility, making it easier to meet compliance requirements and prepare for future network architectures. Amazon MSK is a fully managed service for Apache Kafka that makes it easier for customers to build and run applications that use Apache Kafka as a data store. Previously, MSK Provisioned and Serverless clusters exclusively utilized IPv4 addressing for all connectivity options. With this new capability, customers can now enable dual-stack connectivity (IPv4 and IPv6) on existing MSK clusters using Amazon MSK Console, AWS CLI, SDK, or CloudFormation by modifying the Network Type parameter for a cluster from IPv4 to dual-stack. Upon successful update, MSK provisions IPv6-enabled network interfaces while maintaining existing IPv4 connectivity, ensuring uninterrupted service. To retrieve new IPv6 bootstrap broker strings for MSK Provisioned clusters, customers can use the GetBootstrapBrokers API to obtain the necessary connection information. All MSK Provisioned and Serverless clusters will retain IPv4-only connectivity unless explicitly updated. Dual-stack connectivity for existing MSK Provisioned and Serverless clusters is now available in all [AWS Regions](https://aws.amazon.com/about-aws/global-infrastructure/regional-product-services/) where Amazon MSK is available, at no additional cost. To learn more about Amazon MSK dual-stack support, refer to the [Amazon MSK developer guide](https://docs.aws.amazon.com/msk/latest/developerguide/what-is-msk.html).