QuestionQ24

Explain HPE compute AI and HPC solution components and architecture

How does NVIDIA Spectrum-X handle congestion?

  • A It uses flow metering based on information gathered from control packets to target congestion at the source.
  • B It prevents congestion proactively by using ECMP to distribute traffic across multiple links.
  • C It exclusively uses open standard technologies such as PFC and IP ECN to ensure compatibility for heterogeneous networks.
  • D It allocates a dedicated buffer to each port to prevent traffic loss during congestion.
Explanation

Spectrum-X uses high-frequency, in-band congestion telemetry from Spectrum switches together with flow metering at the sending SuperNICs. The SuperNIC controls each source’s data-injection rate, preventing many-to-one congestion and its resulting backpressure.

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