Error Message "Operation Not Supported" when setting max_tx_rate/rate or min_tx_rate

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Environment

• ConnectX-5 Mellanox Card
• OS: Ubuntu 16.04.6 LTS
• Kernel: 4.4.0-87-generic
• Mellanox OFED driver version: 4.5-1.0.10
• Mellanox Modules Loaded Include:
  • mlx5_ib
  • mlx5_core
  • mlxfw
  • mlx4_ib
  • mlx4_en
  • mlx4_core
  • mlx4_compat

Setup

• The setup that was followed was from documentation from both the 4.5 OFED manual as well as from the Mellanox community articles including https://community.mellanox.com/s/article/howto-configure-rate-limit-per-vf-for-connectx-4-connectx-5.
• We have enabled SRIOV via the following command and the Virtual Functions are working correctly mlxconfig -d /dev/mst/mt4119_pciconf0 set SRIOV_EN=1 NUM_OF_VFS=4.
• We are able to communicate to other hosts via the ib_send_bw command.
• Following the 2019 guide presented here we made sure to enable the mlx4_core parameter in the file /etc/modprobe.d/mlx4.conf by adding in the following line and restarting the machine:

  options mlx4_core debug_level=1 enable_qos=1 enable_vfs_qos=1

Problem

After issuing the following command to change the max bandwidth we received an error.

Command

ip link set dev enp4s0f0 vf 1 rate 1000

Error

RTNETLINK answers: Operation not supported

The same error occurs for both of the following commands as well:

ip link set dev enp4s0f0 vf 1 min_tx_rate 1000
ip link set dev enp4s0f0 vf 1 max_tx_rate 1000

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Problem was solved by upgrading to MOFED 4.6. Upgrade via the mlnxofedinstall file in the MOFED 4.6 directory.