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Javier Bits explains wiring four DGX Sparks in a ring without a switch

1 article1 sourcesince Nov 7Last article 7h ago ·

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Javier Bits says he connected four NVIDIA DGX Sparks in a closed ring without a switch, a setup he says NVIDIA's documentation does not support at four nodes.

He cabled the units as 1 → 2 → 4 → 3 → 1 so that no link spans more than two machines, and he rebuilt the NFS mounts and SSH keys for the fourth Spark. He published a bash script for the setup.

According to his post, a switch is still required for more than four nodes, or for adding and removing machines without recabling.

Written by AI from the articles below · updated Nov 7, 8:08 PM ET

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Latest developmentNov 7, 1:24 PM ET
Javier Bits explains a switchless four-node DGX Spark ring

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Nov 7
  1. Javier Bits • priv/accX
    Javier Bits explains a switchless four-node DGX Spark ring

    AIJavier Bits says he connected four NVIDIA DGX Sparks in a closed ring without a switch, which NVIDIA's documentation does not support at four nodes. He rewired the cables as 1 → 2 → 4 → 3 → 1 so no link spans more than two units, and he had to remake the NFS mounts and SSH keys for the fourth Spark. He shares a bash script for the setup and notes that a switch is still needed for more than four nodes or for adding and removing machines without recabling.

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