Why it matters

Anycast shapes global routing. Understanding shapes design.

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The architecture

Announce IP from multiple locations.

BGP routes to nearest.

No DNS latency.

Anycast routingSame IPmultiple locationsBGP routingnearest hopClient -> nearestno DNS lookup delayCloud provider Anycast: AWS Global Accelerator + GCP Global LB + Azure Front Door
Anycast LLM.
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How it works end to end

Cloud-managed Anycast.

Cross-region backend routing.

Health-check based.