During cluster deployment, the UFM Cable Validation Tool reports "Wrong-neighbor" errors on multiple InfiniBand links. What is the most efficient way…

The UFM Cable Validation Tool's "Wrong-neighbor" error indicates a mismatch between the physical network cabling and the logical topology defined in the UFM topology file. This means a cable connects a port to a different neighbor than specified. The most direct and efficient resolution is to physically move the cables to their correct ports as designated in the topology file. This action aligns the physical infrastructure with the intended network design, ensuring optimal routing and performance.

A. Replacing cables is unnecessary as the error is about incorrect port connections, not faulty hardware.

B. Disabling validation ignores a critical network misconfiguration that can lead to performance degradation or connectivity issues.

D. Regenerating the topology file accepts the incorrect cabling as the new standard, which is not a fix.

1. NVIDIA UFM User Manual (e.g., MLNX-18-15-35v6.9). In sections discussing Cable Management and Validation, it is explained that the tool compares the discovered topology against a provided file. Errors like "Wrong-neighbor" require correcting the physical connections to match the file. (Specific section: "Cable Validation" or "Troubleshooting Topology Issues").

2. NVIDIA. (2023). NVIDIA UFM Enterprise User Manual. Section: "Running Cable Validation". The manual describes how validation errors point to discrepancies between the expected (file) and actual (discovered) topology, implying physical correction is the remedy.