400G Does Not Fail — It Degrades
An interface can be up while the link is already operating outside a stable margin. At 400G, a link being 'up' is not a useful indicator of health.
LATEST
Why Lab Validation Does Not Reflect Production Reality
Lab validation confirms that a configuration can work under ideal conditions. It does not guarantee that it will behave the same way in production. Understanding that limitation is critical.
Firmware Hell — Why Your Optics Break After Upgrade
A system runs stable for months, then starts showing intermittent link resets after a routine update. Nothing is technically broken. The system behavior has changed.
Coherent 400G ZR+ — When Lead Time Becomes a Design Problem
The design is complete. Procurement comes back: 400ZR+ optics are not available for four to five months. That is not a supply chain problem. It is a design assumption problem.
FOGHORN — Why a Whistleblowing Platform for the Internet Industry Matters
The internet industry talks a lot about uptime, redundancy, and resilience. But when it comes to the people running the networks, we have no failover. FOGHORN is my attempt to change that.
What I Built in 30 Days With My Local LLM Stack
In 30 days, I built over 20 production projects using my local AI model stack, achieving what would have taken months with traditional methods.
Price War: What 2026's Transceiver Market Shift Means for Your Budget
As 400G transceiver prices drop, understand the impact on budgets and deployments. Validate compatibility to avoid costly mistakes.
ADHD Diary #004 — ASPA, a Bad Doctor's Day, and Why PeerCortex Has Had This for a While
Today was not a good day. Since my spinal disc surgery, nothing has been working the way it should. Today was the full doctors' marathon — from practice to practice,
The Invisible Battlefield — Infrastructure, Data, and the War Most People Don't See
In this post, I explore the reality of warfare targeting data centers and critical infrastructure, a shift that has been long predicted but is now becoming a harsh reality.
ShieldX v0.5.0 — Self-Evolving LLM Prompt Injection Defense (Open Source)
Learn about ShieldX v0.5.0 - the cutting-edge open-source solution for defending against prompt injection attacks on large language models.
// projects & tools
Magatama
Unified Security Platform — 6 pillars covering AppSec, Cloud, AI, Pentest, Runtime & Compliance.
magatama.dev →
PeerCortex
Network Intelligence Platform — RPKI, ASPA, BGP Health Reports for 70,000+ networks.
peercortex.org →
GitHub
Open source — PeerCortex, PaperCortex, ShieldX, Transceiver DB & more.
github.com/renefichtmueller →
fichtmueller.org
20+ years in optical networking, ISP infrastructure & peering. Social Networker.
fichtmueller.org →
NOGnet
Global NOG Support Program — empowering Network Operator Groups worldwide.
nognet.net →