RoCEv2 (RDMA over Converged Ethernet version 2) is not based on TCP ; instead, it is implemented over UDP/IP . Therefore, the statement is false.
RoCEv2 encapsulates RDMA traffic directly into UDP packets over IP networks , enabling it to operate across Layer 3 networks, unlike RoCEv1 which is limited to Layer 2. This design allows RoCEv2 to leverage existing IP routing infrastructure in modern data centers.
However, because RoCEv2 does not use TCP, it does not inherently provide congestion control or retransmission mechanisms like TCP does. As a result, Huawei emphasizes the need for a lossless network fabric to support RoCEv2 traffic. Technologies such as:
PFC (Priority Flow Control)
ECN (Explicit Congestion Notification)
DCQCN (Data Center Quantized Congestion Notification)
are implemented in Huawei CloudFabric to ensure reliable and low-latency communication.
This architecture is critical for AI computing, HPC, and distributed storage , where RDMA enables high throughput and ultra-low latency.
Therefore, the correct answer is B (FALSE) .
