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Scaling beyond IPv4: integrating IPv6 Amazon EKS clusters into existing Istio Service Mesh

@faun ・ Jul 26,2025

Scaling beyond IPv4: integrating IPv6 Amazon EKS clusters into existing Istio Service Mesh

Amazon EKS now powers IPv6 dual-stack VPC clusters. It doles out /80 prefixes via the VPC CNI flags ENABLE_V6_EGRESS and ENABLE_V4_EGRESS.  AWS ships an Istio multi-cluster playbook—single-VPC to multi-VPC. It rigs remote reader secrets and east-west gateways, fusing IPv4 and IPv6 for service discovery and routing.

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