Question 24
UnclassifiedYou want to verify which leaf switch each GPU node is connected to and confirm that all links are negotiated at NDR 400Gb/s rather than falling back to a lower speed.
Correct answer: D
Explanation
"iblinkinfo" is the InfiniBand utility used to inspect fabric topology and link status, so it can show which leaf switch each GPU node connects to. It also reports negotiated link speed, letting you verify that links are running at "NDR 400Gb/s" instead of a lower fallback rate.
Why each option is right or wrong
A. ibstat
B. perfquery
C. ibdiagnet
D. iblinkinfo
`iblinkinfo` is the InfiniBand fabric inspection utility that queries the subnet manager and prints the discovered topology, including each node’s port-to-port peer and the connected switch/leaf device. Its output also includes the negotiated link rate for each port, so you can confirm the links are at NDR 400 Gb/s and detect any downgrade to a lower speed.