linux 归档 - 第17页共19页

Linux tc netem: Simulate Latency, Packet Loss and Jitter

Simulate latency, jitter, packet loss, corruption and reordering on Linux with tc netem, scope the impairment to one flow, then verify and clean up.

admin 2026-09-04

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Wireshark Capture Filters vs Display Filters Explained

Wireshark capture filters (BPF) versus display filters (DFL) explained: grammar, syntax, performance trade-offs, common mistakes and the workflow for

admin 2026-09-04

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Linux VLAN Tagging with ip link: 802.1Q Sub-Interfaces

Create Linux VLAN sub-interfaces with ip link: 802.1Q tagging, multiple VLANs per trunk, MTU and offload tuning, plus systemd-networkd persistence.

admin 2026-09-04

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iperf3 Bandwidth Testing Guide: TCP/UDP Commands Explained

Measure network throughput with iperf3: TCP and UDP tests, parallel streams, reverse mode, JSON output, MTU and tunnel caveats, plus tuning tips.

admin 2026-09-04

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Jumbo Frame MTU Mismatch: Ping DF Bit Troubleshooting

Fix jumbo frame MTU mismatches with ping and the DF bit: PMTUD black holes, -M do payload sizing, SVI MTU, MSS clamping and oversize counters.

admin 2026-09-03

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ethtool Command Explained: Linux NIC Diagnostics Guide

Learn the ethtool command for Linux NIC diagnostics: link speed and duplex, driver info, error counters, ring buffers, offload features and fibre DOM

admin 2026-09-02

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SONiC CLI Cheat Sheet: Management VRF and Database Commands

SONiC operational cheat sheet: management VRF access, config_db.json persistence, sonic-db-cli and sonic-db-dump operations, Docker containers, image

admin 2026-09-02

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Linux Network Troubleshooting: ss, netstat and tcpdump Guide

Diagnose Linux network issues with ss, netstat and tcpdump: socket states, listening ports, BPF filters, packet capture and a step-by-step triage work

admin 2026-09-01

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Linux 网卡 Bonding 配置实战：bond0 主备与负载均衡

Linux 网卡 Bonding 配置实战：bond 七种模式怎么选、mode 1 主备与 mode 4 LACP 完整配置、bond 叠加 VLAN 与网桥的正确顺序、xmit_hash_policy 哈希调优、故障切换验证方法，以及内核日志中常见 bonding 报错的含义与处理思路。

admin 2026-08-30

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网络环路排查实战：广播风暴与三层环路全解析

从本质到实操吃透网络环路：二层环路广播风暴的形成机制与致命故障特征（ping 丢包率飙升至 100%、设备 CPU 超 90%、MAC 地址漂移），三层环路成因与 TTL 兜底机制，以及查端口流量、查 MAC 漂移、部署环路检测三步定位法与预防措施。

admin 2026-08-29

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标签：linux