This is a follow up to a previous posting to this mailing list regarding
the X557-AT2 chipset/NIC that would not reliably auto-negotiate to 10Gb.
As theorized (after extensive troubleshooting and debugging - Thanks John
Ronciak), the problem was determined to lie in the switch that we were
connecting to. The switch is a QuantaMesh T3048-LY9 which is utilizing the
Broadcom Trident II chipsets (StratXGS).
Working with the switch OS vendor (Cumulus Networks - the switch is a
"whitebox" network switch where the hardware and OS are sold separately) we
were able to determine that the chipset firmware running on the switch was
the problem (I don't know the specific versions involved).
After applying a firmware upgrade to the switch, all problematic NICs
auto-negotiate properly properly and connected at the proper speeds.
I wanted to thank everyone on this list and the guys at Intel for jumping
right in and helping me test and confirm that issue was not at the hardware
or driver level with the X557-AT2.
Warm regards,
Tom Walsh
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