Network Interface Health
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.
- skills.sh installs
- 1.7K
- GitHub stars
- 229.1K
- last updated
- Jul 14, 2026
Install
$ npx -y skills add affaan-m/everything-claude-code --skill network-interface-health --agent claude-codeInstalls into .claude/skills of the current project.
Files
Network Interface Health
Use this skill when a network symptom might be caused by a physical link, switch port, cable, transceiver, duplex setting, or congested interface.
When to Use
- A host or VLAN has packet loss, latency spikes, or intermittent reachability.
- A switch or router interface shows CRCs, runts, giants, drops, resets, or flaps.
- You need to compare both ends of a link before replacing hardware.
- A change window needs before/after interface counter evidence.
- Monitoring reports rising
ifInErrors,ifOutErrors, orifOutDiscards.
How It Works
Interface counters are evidence, but the trend matters more than the absolute number. Capture a baseline, wait a measurement interval, capture again, then compare increments.
show interfaces <interface>
show interfaces <interface> status
show logging | include <interface>|changed state|line protocol
On Linux hosts:
ip -s link show <interface>
ethtool <interface>
ethtool -S <interface>
Counter Reference
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- Repository
- github.com/affaan-m/everything-claude-code
- First seen
- Jun 3, 2026
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