AI Cyberspace
Feb 22, 2025 · Cloud Computing
Why RoCEv2 Needs a Lossless Network and How to Achieve It
RoCE, originally built for InfiniBand, was adapted to Ethernet as RoCEv2, which uses IP/UDP headers to enable L3 routing but is highly sensitive to packet loss, requiring a lossless network and employing technologies such as PFC, ECN, DCQCN, and multi‑path transmission to maintain high RDMA performance.
Congestion ControlDCQCNECN
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