Question
I have a SYS-822GS-NB3RT (B300 GPU System) that has no link on Port 1 of the CX8 board. 
We verified optics, verified cables, swapped optics and cables to working port 2. Verified switch side, all other components good.

Is there anything else we can do to troubleshoot this issue? 
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Answer
You may first try resetting the CX8 using the following steps: 

1) Command: mlxconfig -d <DEVICE_NAME> reset
2) Reboot the System

Reconfigure CX8 to Eth mode (Only if using Ethernet Mode): 
> mlxconfig -d <DEVICE_NAME> set LINK_TYPE_P1=2

Reset will default the CX8 device to Infiniband Mode. 

If that does not resolve the issue, please use the PartnerDiag Utility obtained from your NVOnline account. 
Please submit a CRM ticket to Technical Support and provide the PartnerDiag log for us to review. 
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FAQ ID:
44754
Related Category / Keyword:
Peripherals:
AOC
Date Posted:
02/20/26
Code:
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