<ul data-eligibleForWebStory="true"><li>Calico and Cilium are popular CNI plugins for Kubernetes with different implementations and feature sets.</li><li>Calico uses IP routing and overlays for network policy enforcement, while Cilium leverages eBPF for high-performance networking.</li><li>Cilium can replace multiple Kubernetes networking components with a single solution and offers additional features like Hubble and layer 7 policies.</li><li>Organizations may migrate from Calico to Cilium for efficiency, stack simplification, or to unlock new features.</li><li>During migration, both networking systems coexist, and communication between old and new CNI pods must be maintained to prevent cluster isolation.</li></ul>

Migrating a Kubernetes Cluster from Calico to Cilium (Hands-On Guide)

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