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System Architecture
Oct 27, 2026 • 5 min read

Surviving ISP Anycast Throttling & WebSocket Handshake Drops: Dual-Stack WebSocket + Warm HTTP/2 RPC Failover Architecture

Why mobile and fiber ISPs in emerging markets intermittently throttle HTTP/1.1 WebSocket upgrade handshakes to shared CDN Anycast IPs—and how to engineer a 450ms fast-path WebSocket + warm HTTP/2 JSON-RPC failover layer in TypeScript and FastAPI.

#Cloudflare #FastAPI #HTTP2 #High Availability
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