troubleshooting 归档 - 第12页 共26页 - 夜莺博客

标签：troubleshooting

Junos show interfaces extensive: Error Fields Explained

Junos show interfaces extensive: Error Fields Explained

Decode every counter in Junos show interfaces extensive: input errors, drops, policed discards, L3 incompletes, carrier transitions, HS link and queue

admin admin 2026-09-08
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Cisco IOS-XR Interface CRC Errors: How to Troubleshoot

Cisco IOS-XR Interface CRC Errors: How to Troubleshoot

Diagnose CRC errors on Cisco IOS XR: read show interfaces counters, correlate PCS and optics data, then isolate the faulty cable or module step by ste

admin admin 2026-09-08
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Cisco IOS-XR Input Drops: NP Counter Troubleshooting

Cisco IOS-XR Input Drops: NP Counter Troubleshooting

Cisco IOS XR input drops come from many components, not one queue. Read the interface counters, decode NP counters and capture the dropped packet.

admin admin 2026-09-08
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Junos monitor traffic: Packet Capture Examples

Junos monitor traffic: Packet Capture Examples

Junos packet capture with monitor traffic and forwarding-options sampling: filters, counters, pcap retrieval and Wireshark analysis of the file.

admin admin 2026-09-07
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Cisco UDLD Configuration: Normal vs Aggressive Mode

Cisco UDLD Configuration: Normal vs Aggressive Mode

Configure UDLD on Cisco switches to detect unidirectional fiber links: normal vs aggressive mode, message interval, errdisable recovery and verificati

admin admin 2026-09-07
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Cisco Nexus NX-OS Checkpoint and Rollback Guide

Cisco Nexus NX-OS Checkpoint and Rollback Guide

Cisco Nexus NX-OS checkpoint and rollback guide: create snapshots, diff the patch, run atomic or best-effort rollback, verify and save safely.

admin admin 2026-09-07
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Optical Transceiver Power: Reading Rx/Tx dBm Correctly

Optical Transceiver Power: Reading Rx/Tx dBm Correctly

Read SFP DOM light levels correctly: Tx and Rx power in dBm, typical ranges for 1G and 10G SR/LR optics, warning vs alarm thresholds and fault pattern

admin admin 2026-09-07
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Linux ip neigh: Manage the ARP Table Like a Pro

Linux ip neigh: Manage the ARP Table Like a Pro

Master the Linux neighbor (ARP) table with ip neigh: show, add, delete and flush entries, read NUD states like stale and reachable, and fix failed res

admin admin 2026-09-07
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Cisco IOS NTP Configuration: Server and Source Interface

Cisco IOS NTP Configuration: Server and Source Interface

Cisco IOS NTP configuration guide: server and prefer, source interface, authentication, access groups, verification and troubleshooting unsynchronized

admin admin 2026-09-07
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Junos Rescue Configuration: Save and Recover Quickly

Junos Rescue Configuration: Save and Recover Quickly

Save and restore the Junos rescue configuration: request system configuration rescue save, rollback rescue, automatic recovery at boot and off-box cop

admin admin 2026-09-07
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