Designing cost efficient multi AZ Kubernetes networking Running Kubernetes across multiple availability zones improves resilience, but introduces hidden costs. Cross-zone traffic can increase cloud spend and add latency between services. This session shows how to keep the benefits of multi-AZ setups while avoiding these downsides. You will learn how Cilium enables local-by-design traffic patterns, keeping communication within the same zone where possible, while still ensuring seamless failover. We walk through how Kubernetes service routing creates cross-zone traffic and how to adjust this using Cilium features like topology-aware routing and node-local traffic handling. By the end, you will understand how to design clusters that are resilient and cost efficient without sacrificing performance. What You Will Learn How cross-zone traffic is created in Kubernetes How Cilium enables locality-aware routing How to reduce cross-zone traffic costs How node-local traffic handling works How to design efficient multi-AZ clusters