troubleshooting 归档 - 第11页 共26页 - 夜莺博客

标签：troubleshooting

Catalyst 9000 Smart Licensing Troubleshooting: SLP and CSSM

Catalyst 9000 Smart Licensing Troubleshooting: SLP and CSSM

Fix Cisco Smart Licensing Using Policy on Catalyst 9000: read SMART_LIC errors, restore CSSM trust, solve UDI and clock mismatches, and force a sync.

admin admin 2026-09-12
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Arista EOS MLAG Troubleshooting: Peer-Link and Dual-Primary

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 admin 2026-09-12
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Dell OS10 VLT Troubleshooting: show vlt Commands & Failures

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 admin 2026-09-12
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PPPoE Session Failures: PADI, PADO, PADR and the PPP Stage

PPPoE Session Failures: PADI, PADO, PADR and the PPP Stage

Troubleshoot PPPoE failures in stage order: discovery (PADI/PADO/PADR/PADS), LCP options, authentication and NCP address assignment, plus CPE checks.

admin admin 2026-09-11
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MTU, MSS and PMTUD: Fixing Black-Hole Connections

MTU, MSS and PMTUD: Fixing Black-Hole Connections

Diagnose MTU black holes end to end: MSS arithmetic, why PMTUD fails, encapsulation overheads, MSS clamping on routers and Linux hosts, and DF-bit ver

admin admin 2026-09-11
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Arista EOS VLAN Troubleshooting: Native VLAN and Trunks

Arista EOS VLAN Troubleshooting: Native VLAN and Trunks

A fixed Arista EOS troubleshooting order for native VLAN, trunk allowed-list and port-mode faults, with the show commands that isolate each one.

admin admin 2026-09-11
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Cisco IOS Logging and Syslog Config: Levels, Buffer and Traps

Cisco IOS Logging and Syslog Config: Levels, Buffer and Traps

Cisco IOS ships with logging that is actively unhelpful: a chatty console, a tiny buffer and no history after a reload.

admin admin 2026-09-10
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Cisco IOS IP SLA Configuration: ICMP Echo and Track Objects

Cisco IOS IP SLA Configuration: ICMP Echo and Track Objects

Configure Cisco IOS IP SLA ICMP echo probes and track objects for automatic failover: ip sla, icmp-echo, frequency, timeout and track verification.

admin admin 2026-09-09
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Junos OS Upgrade with request system software add

Junos OS Upgrade with request system software add

Upgrade Junos OS safely with request system software add: pre-flight checks, validate modes, reboot, verification, rollback and dual-RE notes.

admin admin 2026-09-08
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mtr Command Guide: Diagnosing Packet Loss and Latency

mtr Command Guide: Diagnosing Packet Loss and Latency

Use mtr to diagnose packet loss and latency: read the Loss%, Snt, Avg and StDev columns, pick ICMP or TCP probes and avoid ICMP rate-limiting false al

admin admin 2026-09-08
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