Spine buffer profiles for lossless queues differ sharply from leaf profiles on a civic RoCE path, and storage latency spikes under load. What CoS consistency concern should operators address?
Select an answer to reveal the explanation.
Short Explanation
A lossless lane that turns into a bumpy dirt road at the spine still wrecks the glass elevator. RDMA needs matching CoS/buffer intent from leaf through spine, not a leaf-only science project.
Full Explanation
RoCE performance depends on consistent classification, scheduling, and buffer treatment along the entire leaf-spine path. Mismatched lossless queue configuration between leaves and spines creates congestion hotspots even when access ports look correct. ASN matching, leaf-only CoS, or skipping uplink classes undermine end-to-end RDMA CoS design.