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LOG

HBA Queue Depth and SAN Multipath Tuning

HBA Queue Depth and SAN Multipath Tuning

Tune QLogic HBA queue depth and Linux multipath for SAN performance: ql2xmaxqdepth, no_path_retry, queue_if_no_path and how to make it persistent.

admin admin 2026-09-19
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BGP Link Bandwidth Extended Community Explained

BGP Link Bandwidth Extended Community Explained

Use the BGP link bandwidth extended community for unequal-cost load balancing: dmzlink-bw configuration, iBGP propagation, and weight calculation cave

admin admin 2026-09-19
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SONiC VLAN Configuration and Verification

SONiC VLAN Configuration and Verification

Configure and verify VLANs on SONiC: config vlan and vlan member commands, tagged vs untagged ports, show vlan brief, bridge checks and config save ru

admin admin 2026-09-19
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MLNX-OS MLAG (sx_mlag) Configuration & Verification

MLNX-OS MLAG (sx_mlag) Configuration & Verification

Build MLAG on Mellanox/NVIDIA MLNX-OS switches: IPL port-channel, MLAG VIP and system MAC, mlag peer-address, plus the show commands that prove it is

admin admin 2026-09-19
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Cisco IOS XR show tech-support: Collect & Analyze

Cisco IOS XR show tech-support: Collect & Analyze

Collect IOS XR tech-support correctly: scoped collection, custom profiles, node selection and how to read the output before you open a TAC case.

admin admin 2026-09-19
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华为交换机端口隔离 port-isolate 配置与排错实战

华为交换机端口隔离 port-isolate 配置与排错实战

华为交换机端口隔离 port-isolate 配置与排错实战:MUX VLAN 与端口隔离组的选择、隔离端口与上行 Trunk 口的配置要点、同 VLAN 内互访限制的验证命令,以及端口隔离与 ACL、DHCP Snooping 的配合使用和常见故障排查。

admin admin 2026-09-19
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Arista EOS Interface Error Counters Troubleshooting

Arista EOS Interface Error Counters Troubleshooting

Read Arista EOS interface error counters correctly: show interfaces counters errors, discards vs CRC, transceiver DOM checks and the usual Layer 1 roo

admin admin 2026-09-19
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ArubaOS-CX Checkpoint and Rollback Configuration

ArubaOS-CX Checkpoint and Rollback Configuration

Use ArubaOS-CX configuration checkpoints and auto-rollback to recover a switch after a bad change: checkpoint create, diff, rollback and auto-checkpoi

admin admin 2026-09-19
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Dell OS10 Port Monitoring (SPAN) Configuration Guide

Dell OS10 Port Monitoring (SPAN) Configuration Guide

Configure local, remote and encapsulated port monitoring on Dell SmartFabric OS10: monitor session syntax, session limits, verification and packet cap

admin admin 2026-09-19
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Junos FPC Offline & Chassis Alarm Troubleshooting

Junos FPC Offline & Chassis Alarm Troubleshooting

Diagnose Junos chassis alarms and FPC offline states on MX and PTX routers: show chassis fpc, error reasons, offline/online recovery and syslog checks

admin admin 2026-09-19
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