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MTU

29 articles · Page 1 of 1
Ops Community
Ops Community
Jul 10, 2026 · Operations

How to Diagnose Network Packet Loss: Practical Steps from ping to tcpdump

This guide explains how to systematically investigate network packet loss on Linux by collecting timestamps, routing, interface and kernel statistics, using ping, tracepath, curl, netstat, ss, nstat, ip, ethtool, nftables/iptables, and tcpdump on both ends, then narrowing the failure scope, fixing MTU, conntrack, soft‑interrupt or firewall issues, and validating the fix with metrics and roll‑back procedures.

KubernetesLinuxMTU
0 likes · 18 min read
How to Diagnose Network Packet Loss: Practical Steps from ping to tcpdump
Machine Heart
Machine Heart
Jun 17, 2026 · Artificial Intelligence

Programming Agents Achieve 99% Success on Real‑World Robot Experiments

NVIDIA's ENPIRE project equips eight Codex agents with GPU and token budgets to autonomously run a closed‑loop research pipeline on real robots, revealing a physical scaling law, introducing MRU/MTU metrics, and reaching 99% success on complex dexterous tasks.

AI agentsENPIREMRU
0 likes · 8 min read
Programming Agents Achieve 99% Success on Real‑World Robot Experiments
Tech Musings
Tech Musings
May 28, 2026 · Operations

EdgeRouter X PPPoE IPv6 Stalls: MTU 1492 vs Router Advertisement Prefix Overwrite Trap

Enabling IPv6 on an EdgeRouter X PPPoE link caused intermittent SSL time‑outs because the PPPoE MTU of 1492 conflicted with the client’s default MTU, and the router‑advertised link‑mtu overwrote the DHCPv6‑PD‑generated SLAAC prefix, stripping internal devices of a global IPv6 address; manually configuring both MTU and prefix resolved the issue.

EdgeRouter XIPv6MTU
0 likes · 10 min read
EdgeRouter X PPPoE IPv6 Stalls: MTU 1492 vs Router Advertisement Prefix Overwrite Trap
dbaplus Community
dbaplus Community
Apr 27, 2026 · Cloud Native

When MTU Misconfiguration Turns Into a Two‑Day Network Mystery

A two‑day investigation of intermittent packet loss in a hybrid‑cloud Kubernetes environment revealed that an oversized VXLAN MTU caused fragmentation, prompting a step‑by‑step analysis of MTU fundamentals, diagnostic commands, Cilium configuration changes, and best‑practice recommendations for cloud‑native networks.

KubernetesMTUOverlay Networks
0 likes · 30 min read
When MTU Misconfiguration Turns Into a Two‑Day Network Mystery
Xiao Liu Lab
Xiao Liu Lab
Nov 10, 2025 · Operations

Why a Healthy Frontend Still Returns 504 Errors: An MTU Mismatch Case Study

A production incident showed that despite flawless frontend health metrics and no logged errors, a subset of users experienced 504 Gateway Timeout errors caused by an MTU mismatch in the network path, highlighting the need for end‑to‑end connectivity checks beyond application monitoring.

504 timeoutMSS clampingMTU
0 likes · 9 min read
Why a Healthy Frontend Still Returns 504 Errors: An MTU Mismatch Case Study
Liangxu Linux
Liangxu Linux
Aug 27, 2025 · Operations

Why Is My Linux Server Dropping Packets? A Step‑by‑Step Diagnosis

This article walks through a systematic Linux network‑troubleshooting process, examining packet loss at every protocol‑stack layer, using tools such as netstat, ethtool, iptables, tc, and tcpdump, and ultimately fixing the issue by removing a faulty netem rule and correcting the MTU size.

LinuxMTUiptables
0 likes · 12 min read
Why Is My Linux Server Dropping Packets? A Step‑by‑Step Diagnosis
Liangxu Linux
Liangxu Linux
Jun 19, 2025 · Operations

Why Is My Linux Server Dropping Packets? A Step‑by‑Step Debug Guide

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.

MTUethtooliptables
0 likes · 13 min read
Why Is My Linux Server Dropping Packets? A Step‑by‑Step Debug Guide
Liangxu Linux
Liangxu Linux
Jun 11, 2025 · Operations

Why Is Your Linux Server Dropping Packets? A Step‑by‑Step Diagnosis

This article walks through a systematic Linux network packet‑loss investigation, covering every protocol layer from the NIC to the application, analyzing ethtool, netstat, tc, iptables rules, MTU settings, and finally applying fixes to restore reliable connectivity.

MTUiptablespacket loss
0 likes · 12 min read
Why Is Your Linux Server Dropping Packets? A Step‑by‑Step Diagnosis
Goodme Frontend Team
Goodme Frontend Team
Oct 21, 2024 · Mobile Development

Mastering BLE on Mobile: From Basics to Advanced Data Handling

This article explains Bluetooth Low Energy fundamentals, compares classic and BLE, describes BLE mesh networking, provides a complete bleno example for peripheral simulation, and details advertising, scanning, connection flow, MTU negotiation, fragmentation, and sticky‑packet handling on Android and iOS.

AndroidBLEBleno
0 likes · 13 min read
Mastering BLE on Mobile: From Basics to Advanced Data Handling
Wukong Talks Architecture
Wukong Talks Architecture
Jul 25, 2024 · Fundamentals

Debugging APP Load Failures: MTU/MSS Analysis with Wireshark

This article walks through a real‑world case where an app’s content loading fails due to MTU/MSS mismatches, explains how packet captures reveal retransmissions and missing ACKs, demonstrates ping‑based MTU probing, and shows how oversized request parameters in a new version caused the issue.

MSSMTUTCP
0 likes · 5 min read
Debugging APP Load Failures: MTU/MSS Analysis with Wireshark
Bilibili Tech
Bilibili Tech
Jul 23, 2024 · Operations

Network Troubleshooting: MTU/MSS Issues and Packet Capture Analysis

The investigation used Wireshark captures to uncover that a new app version sent oversized TCP segments—due to altered MSS and path‑MTU mismatch—causing unacknowledged retransmissions, which were diagnosed with ping‑do‑not‑fragment tests and resolved by trimming the request parameters and confirming via TLS key logging.

MSSMTUWireshark
0 likes · 7 min read
Network Troubleshooting: MTU/MSS Issues and Packet Capture Analysis
dbaplus Community
dbaplus Community
Apr 29, 2024 · Fundamentals

Why Gigabit Ethernet Falls Short of 125 MB/s and the Jumbo Frame Fix

Although a 1 GbE (1000 Mbps) link theoretically transfers 125 MB per second, real‑world speeds are lower due to protocol overhead, Ethernet framing, and MTU limits; understanding binary prefixes, frame structure, and employing jumbo frames can significantly improve effective throughput.

BinaryPrefixesEthernetJumboFrames
0 likes · 10 min read
Why Gigabit Ethernet Falls Short of 125 MB/s and the Jumbo Frame Fix
dbaplus Community
dbaplus Community
Sep 6, 2023 · Cloud Native

How to Diagnose and Resolve Common Pod Network Issues in Kubernetes

This guide outlines a systematic approach to troubleshooting Kubernetes pod network problems, covering failure models, essential tools like tcpdump, nsenter, paping, and mtr, and detailed case studies that illustrate root cause analysis and remediation steps.

KubernetesMTUPod Connectivity
0 likes · 26 min read
How to Diagnose and Resolve Common Pod Network Issues in Kubernetes
MaGe Linux Operations
MaGe Linux Operations
Apr 15, 2023 · Operations

How to Diagnose and Fix Network Packet Loss in Nginx on Linux

This guide walks through identifying severe packet loss affecting Nginx, using hping3, netstat, ethtool, iptables, and tcpdump, then resolves the issue by removing a faulty netem rule and correcting an MTU misconfiguration, ultimately restoring normal HTTP responses.

MTUiptablesnetwork troubleshooting
0 likes · 19 min read
How to Diagnose and Fix Network Packet Loss in Nginx on Linux
Open Source Linux
Open Source Linux
Sep 14, 2022 · Cloud Native

How to Diagnose Kubernetes Pod Network Failures: Models, Tools, and Real Cases

This article introduces a systematic approach to troubleshooting Kubernetes pod network issues, covering common failure types, essential diagnostic tools like tcpdump, nsenter, paping, and mtr, and detailed case studies that illustrate step‑by‑step analysis and resolution of real‑world connectivity problems.

MTUmtrnetwork troubleshooting
0 likes · 27 min read
How to Diagnose Kubernetes Pod Network Failures: Models, Tools, and Real Cases
Liangxu Linux
Liangxu Linux
Sep 5, 2022 · Cloud Native

How to Diagnose and Fix Pod Network Issues in Kubernetes Clusters

This article introduces a systematic approach to troubleshooting Kubernetes pod network anomalies, covering classification of common failures, essential tools such as tcpdump, nsenter, paping and mtr, detailed packet‑capture techniques, a step‑by‑step troubleshooting workflow, and real‑world case studies to illustrate root‑cause analysis and resolution.

KubernetesMTUcni
0 likes · 28 min read
How to Diagnose and Fix Pod Network Issues in Kubernetes Clusters
Python Crawling & Data Mining
Python Crawling & Data Mining
Jan 17, 2021 · Fundamentals

Mastering TCP: Handshakes, Packet Structure, and Real‑World Wireshark Analysis

This article provides a comprehensive guide to TCP, covering its definition, connection-oriented nature, reliability, byte‑stream model, detailed packet header fields, three‑way handshake, four‑way termination, MTU/MSS concepts, Python simulation scripts, Wireshark capture techniques, common pitfalls, and practical networking programming steps.

HandshakeMSSMTU
0 likes · 29 min read
Mastering TCP: Handshakes, Packet Structure, and Real‑World Wireshark Analysis