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华为交换机堆叠分裂与多主检测 MAD 配置排查指南

华为 S 系列交换机 iStack 堆叠分裂如何排查？本文详解 MAD 多主检测直连/中继/代理三种模式的配置命令、display mad verbose 验证方法，以及分裂后的恢复步骤与常见陷阱和设计建议。

admin 2026-09-12

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Arista EOS MLAG Troubleshooting: Peer-Link and Dual-Primary

Arista EOS MLAG diagnostics: show mlag output explained, reload-delay, dual-primary detection actions and recovering a peer-link failure without loops

admin 2026-09-12

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ArubaOS-CX VSF Split Detection: MAD and Split-Brain Recovery

VSF split detection on ArubaOS-CX: configure MAD over the management port or a MAD VLAN, keep one fragment forwarding, and recover a split stack.

admin 2026-09-12

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Dell OS10 VLT Troubleshooting: show vlt Commands & Failures

VLT faults on Dell OS10 nearly always come down to the VLTi, the backup heartbeat or peer-routing, and these show vlt commands identify which one fail

admin 2026-09-12

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Junos BFD Liveness Detection: Timers, Adaptation & MC-LAG

Tune Junos BFD properly: distributed versus RE-based timers, multihop sessions, adaptation back-off, and how BFD and ICCP liveness share the MC-LAG jo

admin 2026-09-12

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Cisco IOS-XE Embedded Packet Capture: EPC Runbook

Use IOS-XE Embedded Packet Capture on the device itself: pick EPC vs SPAN, size the buffer, filter, run, inspect and export the PCAP, then debug the c

admin 2026-09-11

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Juniper SRX 防火墙用户认证配置：区域、策略与验证

Juniper SRX 防火墙用户认证中文配置教程：从接口地址、安全区域、放行策略到认证动作的完整配置步骤，并补充认证时序、web redirect 与 telnet 方式差异、RADIUS 与本地账号对接要点、NAT 与会话关系、常见排错与验证命令。

admin 2026-09-11

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TLS Certificate Chain Problems: Diagnosing with OpenSSL

Use openssl s_client to prove a certificate chain end to end: missing intermediates, SNI problems, expiry and trust-store gaps, with the exact command

admin 2026-09-11

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Linux Network Namespaces and veth Pairs in Practice

Build isolated networks with ip netns and veth pairs: create namespaces, route between them, bridge multiple peers, and debug inside containers with n

admin 2026-09-11

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SR-MPLS vs SRv6: Choosing a Segment Routing Data Plane

SR-MPLS vs SRv6 compared: label stack and SRH overhead, hardware maturity, TI-LFA and Flex-Algo, migration paths and a greenfield decision framework.

admin 2026-09-11

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