Protocol

DCQCN

Data Center Quantized Congestion Notification

Lab ready Full lab

Data Center Quantized Congestion Notification — RoCE congestion control that uses ECN marks and Congestion Notification Packets to rate-limit senders. Stability depends on α/β, rate AI, and byte-count parameters plus PFC as a safety net. Poor tuning yields either underutilization or pause storms.

Domains

Tags

congestionrocecnprate

Sources

  • DCQCN / RoCEv2 congestion control literature (NVIDIA/Mellanox)

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