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标签：catalyst

Catalyst 9000 交换机输出丢包故障排除

Catalyst 9000 交换机输出丢包故障排除

Catalyst 9000 交换机输出丢包（output drops）排错指南：解析缓冲区共享池与队列阈值机制，解读 Drop-TH0/TH1/TH2、SBufDrop 与 QebDrop 计数器，用 show interfaces 与 queue stats 定位丢包队列，结合 SPAN/Wire

admin admin 2026-08-25
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Catalyst 9000 网络延迟和丢包故障排除指南

Catalyst 9000 网络延迟和丢包故障排除指南

Catalyst 9000 交换机延迟与丢包排障指南：先用ping与traceroute定位故障跳点，再逐层检查物理层错误计数、STP拓扑变更、MAC抖动与二层环路、CAM/ARP老化、SPAN镜像复制开销和ASIC异常丢弃，并覆盖CoPP punt与MTU分片这两类易被误判的原因，最后给出真实案例

admin admin 2026-08-25
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Unexpected MAC Learning on Catalyst 9000 Switches

Unexpected MAC Learning on Catalyst 9000 Switches

Catalyst 9300 learned the gateway MAC on random access ports, breaking a VLAN. How packet reflection, dot1x MAB and stuck MACs caused it, proven with

admin admin 2026-08-23
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