What command is needed to measure BER (Bit Error Rate)?

When updating the firmware on an NVLink switch transceiver, how can an engineer apply new firmware without interrupting the network?

An infrastructure engineer in an AI factory has successfully replaced a power supply unit on an NVIDIA DGX H100. After installation, both the IN and OUT LEDs on the new power supply illuminate solid green. Which NVSM CLI command should the engineer use to quickly verify the overall system status and ensure it is operating as expected?

A leaf switch shows "FW Version Mismatch" alerts for transceivers after cluster expansion. Which tool validates transceiver firmware against expected versions?

A system administrator needs to install a GPU/DPU in a server. The server has a free PCI - e slot, there
are enough free PCI - e lanes, and there is enough room for the card. Which procedure should be
followed?