How do I check the network speed of a virtio-net network interface?

Solution Verified - Updated -

Issue

  • How do I check the network speed of a virtio-net network interface?
  • When a VM use virtio NICs, ethtool is not working
  • Why virtio network nic speed is 1G in subnetwork tab in RHEV Manager web interface ?

Environment

  • Red Hat Enterprise Linux virtualisation host (KVM or RHEV)
  • Linux guest using virtio-net network interface

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