host-gw — 2 Technical Articles

Dec 21, 2021 · Cloud Native

Understanding Flannel’s VXLAN and host‑gw Modes for Kubernetes Networking

This article explains how Flannel implements container networking in Kubernetes using two backends—VXLAN for encapsulated cross‑node traffic and host‑gw for direct routing—detailing packet flow, routing configuration, and performance considerations.

Container NetworkingKubernetesVXLAN

0 likes · 11 min read

Understanding Flannel’s VXLAN and host‑gw Modes for Kubernetes Networking

StarRing Big Data Open Lab

Aug 18, 2020 · Cloud Native

Why Overlay Networks Matter: Deep Dive into Flannel’s UDP, VXLAN, and Host‑gw Modes

This article explains why Kubernetes requires an overlay network, describes Docker’s virtual bridge limitations, introduces Flannel’s architecture and its three data‑forwarding modes—UDP, VXLAN, and host‑gw—detailing their mechanisms, performance trade‑offs, and how the StarRing TCOS platform leverages these modes for different cluster sizes and network topologies.

Container NetworkingKubernetesOverlay Network

0 likes · 13 min read

Why Overlay Networks Matter: Deep Dive into Flannel’s UDP, VXLAN, and Host‑gw Modes