SR-IOV on 82599: Is there any way to set all zero to administratively assigned VF MAC

[MBan]

Hello experts,

I added my question at the end of some old link ( ) but no one answer that. So I'm asking here again.

I'm looking for a way to reset VF MAC, not just OS MAC, according to Patrick it is called "administratively assigned MAC".

At initially when a VF is created it is assigned with 00:00:00:00:00:00 (iproute show) as though in OS log say different. After spawning a virtual machine with the VF having some specific MAC, whenever I destroy that virtual machine libvirt try to revert the mac address of VF but eventually failed. Here's the log.

Dec 27 12:57:13 mita-nova1 kvm: 0 guests now active

Dec 27 12:57:14 mita-nova1 systemd-machined: Machine qemu-6-iovtest terminated.

Dec 27 12:57:14 mita-nova1 journal: End of file while reading data: Input/output error

Dec 27 12:57:14 mita-nova1 journal: Cannot set interface MAC/vlanid to 00:00:00:00:00:00/0 for ifname ens1f1 ifindex -1 vf 1: Invalid argument

Dec 27 12:57:14 mita-nova1 kernel: ixgbevf 0000:05:10.3: enabling device (0000 -> 0002)

Dec 27 12:57:14 mita-nova1 kernel: ixgbe 0000:05:00.1 ens1f1: VF Reset msg received from vf 1

Dec 27 12:57:14 mita-nova1 journal: Failed to open file '/var/run/libvirt/qemu/ens1f1_vf1': No such file or directory

Dec 27 12:57:14 mita-nova1 kernel: ixgbevf 0000:05:10.3: fe:ff:ff:ff:ff:ff

Dec 27 12:57:14 mita-nova1 kernel: ixgbevf 0000:05:10.3: MAC: 1

Dec 27 12:57:14 mita-nova1 kernel: ixgbevf 0000:05:10.3: Intel(R) 82599 Virtual Function

This lead to MAC address collision because the VF will remain in previous MAC address. If I start new virtual machine with the other VF having that MAC address then it won't work.

The host machine is running RHEL 7.3 and ixgbe version is 4.0.1-k-rh7.2. If you need any more information just let me know.

Thanks in advance,

Minho Ban

[idata]

Hi Minho Ban,

Thank you for the post. I will further check on your inquiry. Thank you. Rgds,wb

[idata]

Hi Minho Ban,

Good day. Please refer to page 36 below for the reset function http://www.intel.com/content/dam/doc/design-guide/82599-sr-iov-driver-companion-guide.pdf

Message Handler Function: ixgbe_vf_reset_msg() : ixgbe_sriov.c

Hope the above information helps.rgds,wb

[idata]

Hi Minho,

Please feel free to update me if further assistance needed.rgds,wb