Unable to change MAC address of the interface in VM presented via SRIOV passthrough

Solution Verified - Updated -

Issue

  • A VM guest has been installed, in which interfaces are actually the VFs (Virtual Function) presented via SRIOV passthrough method in it.

  • Command to change MAC address of such a interface using igbvf driver fails with below error:

# ifconfig eth1 hw ether 00:00:5E:00:01:xx
SIOCSIFHWADDR: Cannot assign requested address

# ip link set dev ens11 address 00:00:5E:00:01:xx
RTNETLINK answers: Cannot assign requested address
  • For a interface using ixgbevf driver, the command works but communication fails.

Environment

  • Red Hat Enterprise Linux 7..x
  • igbvf driver
  • Intel Corporation I350 Gigabit Network Connection (rev 01)
  • Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection (rev 01)

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