1) Update to the latest version of the firmware of MCX416A-BCAT 12.21.2010:
2) Power cycle the server and run "mlxconfig -d <device> reset"
3) Try again to set the VF size .
thanks for your reply.
The card has the latest firmware:
[root@localhost:/opt/mellanox] ./bin/flint -d mt4115_pciconf0 -i fw-ConnectX4-rel-12_21_2010-MCX416A-BCA_Ax-FlexBoot-3.5.305.bin burn
Current FW version on flash: 12.21.2010
New FW version: 12.21.2010
Note: The new FW version is the same as the current FW version on flash.
Do you want to continue ? (y/n) [n] :
It must be something else.
it was the "mlxconfig -d <device> reset" which did the trick. So I guess there was a f... up in the configuration and the reset cleaned it.
Thank you very much!