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. Use when an interface shows errors, drops, CRCs, flapping, or a duplex or speed mismatch.
skills/network-interface-health/SKILL.md
Source commit b38be6a7f6350964d59328b52f0624e1d1d552d1
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- Yes
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- Yes
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- Observed behavior
- Network or broad shell
- Last checked
- Nov 3, 2026
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- Repository last updated
- Nov 6, 2026
- License
- MIT
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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