Individual skill
network-interface-health
Diagnose interface errors, drops, CRCs, duplex mismatches, flapping, speed negotiation issues, and counter trends on routers, switches, and Linux hosts.
auc/skill_library/bundled/network-interface-health/SKILL.md
Source commit 39054cbca961e435e99f58384e7f72e76269dd2c
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- Last checked
- Nov 3, 2026
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- Repository last updated
- Jul 29, 2026
- License
- MIT
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- engineering Derived category
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# 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`, or `ifOutDiscards`.
## How It Works
