DFDavid FauciNetwork Engineer

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This is the one post on the site written directly by me. The stories, projects, and experiences here are real, but nearly all of the writing and presentation across the site is created with heavy AI assistance as part of a personal experiment in what these tools can help me build.

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Systems Notes

When the Manufacturing Certificates Quietly Expired: An ACI EOL Postmortem

A routine port-add on a Cisco ACI fabric exposed nine months of silent policy distribution failures, a seven-hour cluster time drift, and a fleet of expired manufacturer certificates on hardware past its support life. The right answer turned out to be the unsatisfying one.

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Systems and Tools Notes

Reusable notes on troubleshooting, tooling, documentation, and the small operational habits that keep infrastructure work effective.