This article walks through a systematic Linux network packet‑loss investigation, covering potential loss points across the protocol stack, using ethtool, netstat, iptables, tc netem, and MTU adjustments, and demonstrates how to verify and resolve the issue with hping3 and curl.
This guide explains how to verify physical links, test ping latency, trace routes, check HTTP/HTTPS availability with wget and curl, assess TCP/UDP ports using netcat, telnet, and nmap, inspect local connections via netstat/ss, understand TCP states, and validate DNS resolution, providing practical command examples for each step.
Learn how to verify physical link status, test network reachability, trace routes, and diagnose TCP/UDP ports using Linux utilities such as ethtool, ping, tracepath, wget, curl, netcat, telnet, nmap, netstat, and ss, with practical command examples and interpretation tips.
This guide explains how to set up both permanent and temporary IP addresses on Linux servers, covering configuration file edits, command-line tools like ifconfig, route, and ethtool, and includes step‑by‑step examples for SuSE environments.
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.
This article explains the concept of network packet loss, walks through the sending and receiving mechanisms of Ethernet frames, and provides a comprehensive, layer‑by‑layer checklist—including hardware NIC, driver, kernel, IP, TCP/UDP, and application‑level diagnostics—plus concrete Linux commands and configuration tweaks to locate and fix the root cause.
This article walks through the Linux kernel boot sequence, the initialization of the kernel networking stack, the registration and initialization steps of the Intel I350 (IGB) network driver, and demonstrates how to inspect the resulting network interface using ifconfig and ethtool commands.
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.
This article explains how TCP packets travel from user space to the destination, highlights typical points where packet loss can occur—including connection establishment, flow‑control queues, NIC buffers, and end‑to‑end network hops—and shows how to diagnose and mitigate these issues using Linux tools.
This guide introduces tmux, the powerful terminal multiplexer for Linux, covering core session, window, and pane commands along with handy keyboard shortcuts, and also explains how to identify physical network interfaces using ethtool, providing practical examples for everyday system administration.
ethtool is a Linux command-line utility for querying and modifying network interface parameters, offering options to view driver info, adjust speed, duplex, offload settings, and perform self-tests, with practical examples demonstrating how to inspect and configure interfaces such as ens33.
This guide shows how to use shell commands and simple Bash scripts on CentOS 7 to list active network interfaces, extract their IPv4/IPv6 addresses, display MAC addresses, and check link speed using ip, awk, ethtool, and other standard utilities.
This article explains the common causes of network packet loss on Linux, walks through the packet transmission process, outlines a layer‑by‑layer troubleshooting framework, and provides concrete commands, configuration tweaks, and hardware checks to identify and resolve loss at the NIC, driver, kernel, IP, TCP, UDP, and application layers.
This guide explains the fundamentals of network packet loss, illustrates how packets are sent and received, and provides step‑by‑step troubleshooting methods for hardware NIC, driver, kernel stack, TCP/UDP, and application‑level issues on Linux systems, complete with command examples and visual diagrams.
This article explains how to monitor and tune Linux network packet reception using tools such as ethtool, ifconfig, and procfs, covering RingBuffer inspection, hardware and soft interrupt analysis, multi‑queue configuration, interrupt coalescing, and GRO settings to improve throughput and reduce packet loss.
This guide explains the Linux packet‑receive path, shows how to verify UDP loss with tools like ethtool, ifconfig, and netstat, and provides step‑by‑step methods to identify NIC, driver, kernel, firewall, buffer‑size, and application causes while offering concrete commands to adjust ring buffers, sysctl parameters, and socket settings.
This guide explains the Linux packet‑receiving process, shows how to identify where UDP drops occur, and provides practical commands and kernel tuning tips to troubleshoot network‑card, driver, system, and application‑level packet loss.
This guide explains how to improve network subsystem performance on Kunpeng processors by using tools such as ethtool and strace, adjusting PCIe payload size, binding NIC interrupts to NUMA‑local cores, tweaking interrupt coalescing, enabling TSO, and replacing select with epoll for high‑concurrency workloads.
Learn step-by-step how to verify UDP packet loss on Linux, interpret driver and kernel statistics, adjust ring buffers and socket buffers, and use tools like ethtool, netstat, dropwatch, and perf to pinpoint and resolve network drops caused by hardware, configuration, or system load.
