Internet routing

Peering

Run an autonomous system, and keep the CFO happy.

You play an ISP's network engineer and its CFO at the same time. You watch BGP announcements, route leaks, hijacks, DDoS, and a 95th-percentile bill.

· Not playable yet — see the changelog

What you'll come away knowing

Valley-free routing, and why local-pref preferring the customer path is exactly what makes a route leak propagate.
That the longest prefix wins, which is why a more-specific announcement hijacks traffic.
That RPKI stops origin hijacks but does not stop path forgery.
How 95th-percentile billing rewards flat traffic and punishes one bad night.
That remotely triggered blackholing finishes the attacker’s job on purpose, and when that is still the right call.
That your DNS is a prefix too, and withdrawing it takes you off the internet.

How the model works

This sim is still being built. The model, scenarios and visuals for internet routing are on the plan but not yet playable.

The shared engine it will run on is finished: deterministic fixed-timestep model in a Web Worker, checkpoints and seek, replayable share links, and the trace strip every sim uses.

Questions

When will it be playable?

Sims ship one at a time, each with at least eight scenarios, a full test suite and a landing page, before the next one starts. Check the changelog.