HACKER Q&A
📣 avi_vallarapu

Doesn't the Rogers outage prove – network as a single point of failure?


High Availability and Disaster Recovery and Auto-Scaling and a design in place to avoid SPOF (Single Point of Failure) always ignore Network being a SPOF. But, Network can be a Single Point of Failure too.

  👤 wmf Accepted Answer ✓
This has been known for a long time. Almost every data center uses multiple ISPs for this reason.
👤 leastonce
Network is not a SPOF. Poorly implemented network can be though. My team manages a global network. We run outage simulations quarterly ( to check for unintended consequences of changes ).

Part of that process is to down all circuits and services from a vendor.

Could vendors be sharing upstream Concentrations that create SPOF. Sure they could. That’s why we contract a single vendor to create truly diverse services.

We see 100x outages and failures from craplications vs network.