Scaling QUIC Ingress: eBPF Socket Steering for HTTP/3 Connection Migration

Short summary

QUIC's connection migration breaks naive UDP load balancers because they hash the 4-tuple to route packets, but IP changes invalidate the hash. eBPF-based socket steering at kernel layer reads QUIC Connection IDs instead, ensuring packets route to the correct worker across IP migrations. Production deployments require careful socket generation tracking during restarts to avoid orphaning in-flight connections.

• •QUIC connection migration defeats 4-tuple-based UDP load balancing
• •eBPF kernel socket steering reads Connection IDs for correct packet routing
• •Production implementations need socket generation tracking for graceful restarts

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