How to configure VMware vmxnet3 RSS queues?

Solution Verified - Updated -

Issue

  • How to configure VMware vmxnet3 NIC to 32 RSS queues?
  • VMware paravirtualized NIC should report up to 32 IRQ channels, but ethtool only shows 8, how to use the higher number of channels?
  • My VMware VM with 16 CPU cannot be modified to Receive Side Scaling combined queue of 16:
# ethtool -L eth0 combined 16
netlink error: Operation not supported

Environment

  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux 8.6 and later
  • VMware virtualization
    • ESXi 7.0 or later
    • VMX version 17 or later
    • vmxnet3 paravirtualized network interface
  • VCPU core count greater than 8

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