Missing NVSwitch Bandwidth (RX / TX) in dcgm-exporter

[suranchoi]

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Version

• GPU : H200
• Server : XD 670
• GPU Driver : 565.57
• dcgm-exporter : 3.3.8 (build binary file)

Hello, I’m running a custom server (not a DGX) that has 8x NVIDIA H100 GPUs connected via NVSwitch.
I’m using dcgm-exporter to monitor GPU metrics. Additionally, to verify the NVSwitch bandwidth, I ran NCCL tests and also performed model training using DDP. While I can see NVLink traffic clearly, the NVSwitch traffic metrics remain at 0

I also have dcgmi installed, which runs but doesn’t appear to expose any NVSwitch-specific data.

Could you clarify whether dcgm-exporter (or DCGM in general) supports NVSwitch metrics on non-DGX servers? If so, are there any extra steps or configurations needed to enable this? If not, is there another recommended approach or tool to measure NVSwitch traffic on a non-DGX system?

[glowkey]

Which metrics are you monitoring? Can you attach the output of the exporter? Is the libnvidia-nscq library installed?

[suranchoi]

The metrics is "DCGM_FI_DEV_NVSWITCH_THROUGHPUT_TX/RX" or "DCGM_FI_DEV_NVSWITCH_LINK_THROUGHPUT_TX/RX" (I don't remember exactly)

This is a customer environment, so I can not attach the output..

AND "libnvidia-nscq library (matched GPU Driver version) is installed.