rf.blog (Page 2)

BGP Communities Networking RTBH RFC 8092 Internet Infrastructure Network Engineering Routing Policy IXP Peering

BGP Communities: The Feature Everyone Ignores

BGP communities ship on every router. Most operators use three of them. Large communities, RFC 8092, selective announcement, RTBH signaling — the full feature set sits untouched in most networks.

Rene Fichtmueller / 2026-05-27 / ~2 min read

aspa bgp rpki route-leaks

ASPA (RFC 9234): The BGP Verification Nobody Implements Yet

RPKI was supposed to fix BGP. It fixed exactly one BGP problem: somebody else announcing your prefix from an AS that doesn't own it. That's origin

Rene Fichtmueller / 2026-05-26 / ~3 min read

ADHD Diary No-Travel-Day Magatama Building Neurodivergent Security Personal Vision Open Source

ADHD Diary #005: When the Vision Finally Clicks

No-Travel-Day. The week Magatama stopped being a collection of security tools and became a platform. What happens inside an ADHD brain when 18 months of fragmented work suddenly makes sense.

Rene Fichtmueller / 2026-05-26 / ~2 min read

bgp looking-glass network-ops

Looking-Glass Output Is Not Reality — An Operator's Mental Model

A looking glass is a window. You stand on one side, look through, and see a slice of the network. The slice is real. It is also one router, at

Rene Fichtmueller / 2026-05-25 / ~3 min read

AI Security Open Source ShieldX ShieldY LLM Prompt Injection Security MITRE ATLAS Red Team TypeScript

The Open Source AI Security Stack That Actually Exists

Vendor solutions for LLM security cost $50,000/year and scan for yesterday's attacks. The open source stack is fragmented but works. Here's what actually exists — and what's still missing.

Rene Fichtmueller / 2026-05-23 / ~2 min read

dsp coherent vendor-consolidation

Coherent DSP Vendors Are Down to Three. Here's What That Means.

Six coherent DSP houses competed in the optical market in 2018. By 2020 the field was five. By 2022 it was four. As of mid-2025, three remain. Two of those

Rene Fichtmueller / 2026-05-22 / ~4 min read

Ollama Local LLM Mac Studio Production AI Self-Hosted Privacy llama qwen Apple Silicon AI Infrastructure

Ollama in Production: Running 70B Locally

Mac Studio M4 Pro with 48GB unified memory runs llama3.3:70b for reasoning tasks. Real latency numbers, model selection logic, and where local inference actually beats cloud.

Rene Fichtmueller / 2026-05-22 / ~2 min read

cpo packaging ai-fabric

Pluggable vs Embedded — When the CPO Hype Actually Pays Off

Every conference deck about co-packaged optics shows the same number: switching ASIC SerDes drives 30 to 40 percent of the system power, and CPO can eliminate most of it. The

Rene Fichtmueller / 2026-05-21 / ~3 min read

LLM Gateway AI Circuit Breaker Failover Production AI TypeScript Fastify Confidence Scoring Ollama Architecture

LLM Gateway Patterns: What We Learned After 50,000 Requests

Circuit breakers, confidence scoring, failover chains — an LLM gateway isn't a proxy. After 50,000 production requests through our internal gateway, here's what the patterns actually look like.

Rene Fichtmueller / 2026-05-21 / ~2 min read