When you're chasing intermittent packet loss or latency spikes and suspect a bad cable, misconfigured port, or congested uplink, this skill walks you through the diagnosis. It covers the full counter reference,CRCs, runts, giants, input and output drops,and emphasizes comparing both ends of a link before you swap hardware. The guidance on duplex mismatches is solid: never mix auto on one side with fixed on the other. It includes a clean Python parser that slices interface blocks correctly instead of using arbitrary character windows. The diagnosis flow separates physical layer problems from congestion, which saves you from replacing optics when the real issue is an oversubscribed uplink.
npx skills add https://github.com/affaan-m/everything-claude-code --skill network-interface-health