RoCE · RDMA over Converged Ethernet
RDMA over Ethernet. ECN signals congestion; it does not make the fabric lossless. The design must state queueing and congestion control plus any PFC, retransmission/recovery, routing, buffering, and failure-handling choices.
Also written as: RoCEv2 · RoCEv1
Current numbers
51.2 TbpsBroadcom Jericho4 deep-buffer router; 3nm; HBM packet memory (~160× on-chip); RoCE over >100 km via 3.2 Tbps HyperPorts
400Gspeed at which Meta ran production RoCE PFC-only on the back-end, leaning on topology over loop tuning