troubleshooting 归档 - 第10页共26页

ArubaOS-CX NAE: Scripts, Agents and Alerting

ArubaOS-CX Network Analytics Engine explained: monitors, rules, conditions and actions, plus how to upload scripts, run agents and debug the common NA

admin 2026-09-14

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Junos traceoptions: Debug BGP Without Guessing

Production-safe Junos traceoptions for BGP: flag choices, file size and rotation limits, scoping to a group or neighbour, reading the log, and clean r

admin 2026-09-13

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BGP Route Flap Damping: Penalty, Half-Life, Reuse

BGP route flap damping tuning in practice: penalty values, half-life decay, suppress and reuse thresholds, and how to troubleshoot and clear a damped

admin 2026-09-13

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PAN-OS Commit Failures: Logs and Validate Explained

Diagnose PAN-OS commit failures: validate full, show jobs, ms.log, devsrvr.log, configd.log and the disk or process states that silently block commits

admin 2026-09-13

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Coherent Optics: Pre-FEC BER, OSNR and DSP Checks

Coherent module troubleshooting beyond optical power: pre-FEC vs post-FEC BER, OSNR margin, DSP lock, frequency offset and EVM thresholds explained.

admin 2026-09-13

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ROADM Power Equalization and APC Explained

Why per-channel power drifts in DWDM, how APC and ROADM equalization correct it, and the amplifier modes, span loss and OSNR margin checks that keep i

admin 2026-09-13

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Cisco 交换机 CPU 占用过高排查：从 show processes 到 CoPP

Cisco Catalyst 交换机 CPU 占用过高怎么排查？本文用 show processes cpu 与 platform 输出区分进程占用还是上送 CPU 的流量，并给出 SISF、ARP 风暴与 CoPP 控制平面限速的完整处置流程。

admin 2026-09-12

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bpftrace One-Liners for Production Linux Debugging

bpftrace one-liners for production Linux: which process opens which file, which syscall is slow, read-size histograms and the BTF prerequisites.

admin 2026-09-12

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Ceph OSD Down and Stuck PGs: A Triage Runbook

Triage Ceph from the CLI: read ceph -s and health detail for down OSDs, inspect stuck and incomplete PG states, and replace an OSD without a rebalance

admin 2026-09-12

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Wireshark TCP: Retransmission vs Out-of-Order vs Loss

Wireshark TCP retransmission flags are interpretations, not facts. Use sequence ranges, SACK blocks and capture points to separate real loss from reor

admin 2026-09-12

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标签：troubleshooting