WebAssembly Powered

BGP Route
Simulator

Simulate valley-free BGP routing on the real internet topology — 78,000+ ASes and 489,000+ edges — entirely in your browser. No server required.

78,370 Autonomous Systems

489,407 Network Edges

~1s Avg Simulation

Configuration

Step 1

Announcements CSV seed_asn, prefix, rov_invalid

1 2 3

Target ASN View routing table at this AS

ROV-Enabled ASNs (optional)

Routing Table

Configure your simulation on the left, then click Run Simulation to see results here.

1 Enter announcements CSV or upload a file

2 Set which AS you want to inspect

3 Click Run — results appear here

Prefix	AS Path	Length	Origin	Next Hop

How It Works

Load Topology

On page load, the real CAIDA AS relationship dataset (78K ASes, 489K edges) is loaded into the WASM runtime.

Input Announcements

Provide a CSV of BGP announcements (seed ASN, prefix, ROV status) and choose a target AS to inspect.

Simulate

Valley-free propagation runs in C++ compiled to WebAssembly: up through providers, across peers, down to customers.

View Results

See the full routing table at your target AS: each prefix, the AS path it took, origin, and next hop.