troubleshooting 归档 - 第14页 共26页 - 夜莺博客

标签：troubleshooting

Junos Interface Flapping: Layer 1 Troubleshooting Checklist

Junos Interface Flapping: Layer 1 Troubleshooting Checklist

Junos interface flapping troubleshooting: read media and extensive output, check optics power, run loopback tests, then rule out Layer 2 causes.

admin admin 2026-09-03
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Jumbo Frame MTU Mismatch: Ping DF Bit Troubleshooting

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 admin 2026-09-03
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MLNX-OS CLI Filters, watch and Link Diagnostics Commands

MLNX-OS CLI Filters, watch and Link Diagnostics Commands

Speed up NVIDIA Mellanox MLNX-OS troubleshooting: include and exclude filters, watch, count and json-print output, plus link-diagnostics status codes.

admin admin 2026-09-03
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BGP Route Dampening: Penalty, Half-Life and Reuse Limits

BGP Route Dampening: Penalty, Half-Life and Reuse Limits

BGP route dampening attributes explained - penalty, suppress-limit, half-life and reuse-limit - with Cisco IOS and Junos config and tuning advice.

admin admin 2026-09-03
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Huawei S7700/S9700: reset saved-configuration Commands

Huawei S7700/S9700: reset saved-configuration Commands

Clear Huawei S7700/S9700 config safely: reset saved-configuration prompts, backup first, reboot answers, per-interface clearing and verification.

admin admin 2026-09-03
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Cisco ASR 9000 Boot Loop After Upgrade: IOS XR Recovery

Cisco ASR 9000 Boot Loop After Upgrade: IOS XR Recovery

Recover an ASR 9000 line card stuck in a boot loop after an IOS XR upgrade: hw-module bootmedia network reload, FPD auto-upgrade and post-recovery che

admin admin 2026-09-03
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Juniper MC-LAG ICCP Failure: LACP System ID Behavior on QFX

Juniper MC-LAG ICCP Failure: LACP System ID Behavior on QFX

How Juniper QFX switches behave when the MC-LAG ICCP link fails: backup liveness detection, LACP system ID changes, timers and verification commands.

admin admin 2026-09-03
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SFP Optical Transceiver Troubleshooting: Engineer's Checklist

SFP Optical Transceiver Troubleshooting: Engineer's Checklist

SFP transceiver troubleshooting checklist: read DOM data, clean end faces, check coding, compare Tx and Rx power on both ends, then isolate the fault.

admin admin 2026-09-02
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ethtool Command Explained: Linux NIC Diagnostics Guide

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 admin 2026-09-02
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ArubaOS-CX Edge Port Hardening: Access and Trunk Templates

ArubaOS-CX Edge Port Hardening: Access and Trunk Templates

ArubaOS-CX access and trunk hardening templates: BPDU guard, loop protect, tcn-guard, tagged native VLANs, LACP uplinks, PoE and verification commands

admin admin 2026-09-02
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