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The article explains what a data center is, why interconnecting multiple data centers has become essential for scale, cross‑region access, disaster recovery, and cloud‑native virtualization, and compares two VXLAN‑based DCI architectures—end‑to‑end VXLAN and segment VXLAN—along with the key underlying technologies.
The article explains what data centers are, why interconnecting multiple data centers is essential for modern cloud, AI, and big‑data workloads, and compares two practical DCI architectures—end‑to‑end VXLAN and Segment VXLAN—detailing their underlying VXLAN, EVPN, and underlay requirements.
VXLAN (Virtual Extensible LAN) is a network‑virtualization overlay that encapsulates Ethernet frames in UDP packets to create logical Layer‑2 domains over IP networks, enabling seamless VM migration, massive tenant isolation, and flexible gateway designs, while EVPN provides a scalable control plane for dynamic tunnel management.
This article details the evolution of 360 Qiyun's VPC solution, describing the two‑stage migration from a customized OpenStack Neutron Liberty deployment to a hardware‑assisted EVPN + VXLAN architecture, the specific network enhancements made, performance problems encountered, and the operational benefits achieved.