https://sebasblog.com/archives/2025-10/Recent content in 2025-10 on Sebastian Scheinkman - Red Hat Openshift, Networking, Kubernetes and Cloud NativeHugoen-ussebasblog.comSun, 12 Oct 2025 00:00:00 +0000https://sebasblog.com/p/bridging-worlds/Sun, 12 Oct 2025 00:00:00 +0000https://sebasblog.com/p/bridging-worlds/<h1 id="bridging-worlds-high-performance-telco-networking-in-kubernetes-with-sr-iov-dra-and-nri"><strong>Bridging Worlds: High-Performance Telco Networking in Kubernetes with SR-IOV, DRA, and NRI</strong></h1> <h2 id="the-telco-imperative-why-bare-metal-speed-matters-in-a-virtualized-world"><strong>The Telco Imperative: Why Bare-Metal Speed Matters in a Virtualized World</strong></h2> <p>The telecommunications industry is undergoing a profound transformation, driven by the shift from proprietary, hardware-centric appliances to flexible, software-based solutions running on standard IT servers. This paradigm, known as Network Functions Virtualization (NFV), promises unprecedented agility, scalability, and cost efficiency. However, this transition introduces a formidable challenge: performance. For critical network functions, particularly those in the data plane of a 5G network like the User Plane Function (UPF), performance is not merely a feature—it is an absolute prerequisite. These functions must process millions of packets per second with minimal latency, a task for which traditional software-based virtual networking is often ill-equipped. This is where Single Root I/O Virtualization (SR-IOV) becomes an indispensable technology.</p>https://sebasblog.com/p/beyond-eth0/Sat, 04 Oct 2025 00:00:00 +0000https://sebasblog.com/p/beyond-eth0/<h1 id="beyond-eth0-a-deep-dive-into-kubernetes-multi-network-pods-with-multus-cni"><strong>Beyond eth0: A Deep Dive into Kubernetes Multi-Network Pods with Multus CNI</strong></h1> <h2 id="the-kubernetes-network-model-a-foundation-of-simplicity-and-its-limitations"><strong>The Kubernetes Network Model: A Foundation of Simplicity and its Limitations</strong></h2> <p>At the heart of Kubernetes&rsquo; design is a networking model that is both powerful in its simplicity and opinionated in its structure. This model was created to solve the complex networking challenges inherent in running distributed systems across a cluster of machines. To truly grasp the need for advanced solutions like Multus, one must first understand the foundational principles of Kubernetes networking and the specific limitations that drive the demand for multi-homed Pods.</p>