Water-utility analytics nodes need RoCE on Spectrum-X while keeping management Ethernet separate. Which configuration practice is appropriate?
Select an answer to reveal the explanation.
Short Explanation
Treat RoCE like the closed water-main tunnels and management Ethernet like the office hallway—you do not flood one into the other. Isolate AI RoCE VLANs from management so utility analytics RDMA stays clean and admin access stays predictable.
Full Explanation
Water-utility analytics nodes that need RoCE on Spectrum-X should keep RoCE AI VLANs and paths isolated from management Ethernet so RDMA and admin traffic are not incorrectly mixed. Separation protects lossless AI queues from SSH, BMC, monitoring storms, and broadcast domains used for operations, and it keeps utility cybersecurity boundaries clear: analytics collectives stay on the AI fabric while operators manage devices on management networks.
Terminating RoCE AI VLANs on management switches to consolidate RDMA gateways with admin routing mixes pause-sensitive RDMA termination points with chatty admin traffic and expands the failure domain exactly where isolation was required. Enabling Spectrum-X adaptive routing and telemetry on management Ethernet while leaving RoCE queues standard misplaces the effort: adaptive routing and congestion telemetry matter on the lossless RoCE fabric itself, not on the management plane, and it leaves the actual RDMA queues untouched. Configuring PFC and ECN lossless QoS on management Ethernet uplinks for SSH and BMC while using default RoCE fabric buffers inverts the design: it hands lossless treatment to admin traffic that does not need it while leaving the RoCE buffers that do need tuned PFC and ECN at their defaults.
Exam caveat: isolation of AI RoCE from management is a design requirement, not optional tidiness. Operational check: document distinct VLANs/VRFs for RoCE versus management on the water-utility Spectrum-X deployment, verify untagged/tagged port roles, confirm collectives never hairpin through the Internet edge, and audit that BMC/SSH do not share the RoCE untagged AI ports.