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Open Source Networking BGP RPKI PeerCortex ASPA Network Intelligence Internet Infrastructure Routing Security Health Check Peering

PeerCortex: Why I Built a Network Intelligence Platform

70,000+ networks. 13 health checks. One tool that didn't exist — so I built it.

Rene Fichtmueller / 2026-04-05 / ~2 min read

Optical Networking 800G 400G Deployment Data Center Optical Transceiver OSFP QSFP-DD PAM4 Network Design TCO Fiber Infrastructure

800G: The Upgrade That Exposes Everything

A $350 optic turned into an $18,000 problem. Not because the optic failed — because nobody cleaned the connector.

Rene Fichtmueller / 2026-04-05 / ~1 min read

// about the author

Rene Fichtmueller

Social Networker

20+ years building and breaking networks. Optical transport, peering, data center infrastructure. Writing about the things that go wrong at 2AM — and how to prevent them.

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