Postmortems
Practical
By Samson Tanimawo, PhD
Published Aug 2, 2025
4 min read
Cloudflare 2019 Routing Incident
BGP gone wrong.
Overview
Cloudflare 2019 Routing Incident: a practical look at the patterns that work and the trade-offs that matter.
BGP gone wrong. The full picture, in three sections.
The approach
Each pattern has a context where it wins. Understand the context before applying.
Tooling matters. Pick tools that fit the workflow; don't force-fit.
Why this compounds
Healthy practice compounds year over year. Year 1 lays the foundation.
Year 2 and beyond: practices become habits; quality improves measurably.