360 Zhihui Cloud Developer

Jul 15, 2026 · Cloud Native

How Cilium Implements Network Policies: A Five‑Layer Deep Dive with Real‑World Configurations

The article explains Cilium’s eBPF‑based network‑policy architecture across five layers—program loading, identity system, map storage, packet processing, and policy types—then demonstrates three practical YAML configurations, while also covering VPC‑CNI integration and deployment details.