Diagnose an InfiniBand fabric with infiniband-diags, ibdiagnet, mlxlink and the firmware tools, in the order that finds the fault fastest and with evidence a customer can send you.

1. 4.1 Discovering a fabric: ibnetdiscover and iblinkinfoEverything came backAp
2. 4.2 Counters and errors that mean somethingSeven digits and a purchase orderAn
3. 4.3 ibdiagnet: the command you run before escalatingThree theories and eleven hoursAp
4. 4.4 Link surgery and PHY triageSend us a cableAn
5. 4.5 Drivers and firmware: DOCA-OFED, mlxfwmanager, mlxconfig, NVOSThe migration plan with one line missingAp
6. Checkpoint