We experience an issue that we cannot vmkping between 2 hosts with X710 which are direct connected with DAC cables. Auto nego is not on and I think thats the problem.
Ethtool gives the following information.
[root@esxi02:/tmp/ESXi_x64] ethtool -i vmnic6
firmware-version: 4.42 0x80001949 1.1024.0
Running latest nvmupdate.(this fails probably because it has a custom Lenovo FW)
[root@esxi02:/tmp/ESXi_x64] ./nvmupdate64e -l
Intel(R) Ethernet NVM Update Tool
NVMUpdate version 1.25.20.03
Copyright (C) 2013 - 2015 Intel Corporation.
WARNING: TO AVOID DAMAGE TO YOUR DEVICE, DO NOT EXIT OR REBOOT OR POWER OFF THE SYSTEM DURING THIS UPDATE
Config file read.
Num Description Device-Id B:D Adapter Status
=== ====================================== ========= ===== ====================
01) Intel(R) Ethernet Converged Network Ad 8086-1572 129:00 Update not available
Tool execution completed with the following status: All operations completed successfully
Press any key to exit.
[root@esxi02:/tmp/ESXi_x64] ethtool -a vmnic6
Pause parameters for vmnic6:
[root@esxi02:/tmp/ESXi_x64] ethtool --pause vmnic6 autoneg on
Cannot set device pause parameters: Operation not supported
We want to use 10gbit with DAC direct connection between 2 hosts for vMotion.
At this moment I cannot find a solution with the X710 cards. If we cannot find a solution on time, we probably move to Broadcom.
It's purchased from Lenovo, yes.
I managed to get direct attaching to work between 2 hosts after recreating the vSwitch.
Anyway now I connected the 10Gb links directly on a 10Gb switch and the X710 ports are now switching between 10000 FULL and down state.
I also tried older vmware drivers but this didnt help either. :/