This guide explains the concepts of network bandwidth, shows how to check physical and virtual NIC speeds on Linux using ethtool, dmesg, and mii‑tool, demonstrates real‑world throughput testing with iperf3, and provides tips for identifying network bottlenecks.
The article reviews the four-stage evolution of network adapters—from traditional NICs to smart NICs, FPGA‑based DPUs, and DPU‑SoC cards—detailing their hardware features, programmable capabilities, deployment methods, and use cases in modern cloud and virtualization environments.
This guide explains how a network interface card (NIC) receives packets, the role of DMA, interrupt handling, poll functions, and ring buffers, then details multi‑CPU ring buffer handling, key ethtool commands for statistics, buffer size, queue configuration, and hash‑based flow distribution.
This article explains the Linux NIC packet processing flow, multi‑CPU ring buffer handling, and provides practical ethtool commands for monitoring and tuning ring buffer size, queue count, weight, and hash fields to reduce packet loss and improve network throughput.
When upgrading a Linux OS on a Dell PowerEdge C6420 via UEFI, the Mellanox 25G network adapter disappears from Device Settings, and this guide walks you through using the Mellanox Firmware Tools to enable the NIC with detailed commands, screenshots, and hardware requirements.
This guide explains Linux network interface bonding, detailing all seven bonding modes, their characteristics, required switch configurations, and provides step‑by‑step instructions for setting up bond0 with configuration files, modprobe options, and verification commands to achieve high‑availability and load‑balanced networking.
