Re: [ovirt-users] macvlan + IPv6

As a follow-up to this, I made some headway in sorting out the source of the issue, but hoping someone can give me a pointer to where this is happening in the code, as well as some understanding for why. In oVirt, when I allocate a virtual function to a guest, a new MAC address is generated for the VF (as it should be) from the MAC address pool in oVirt, and then that MAC address is written to the VF on the hypervisor. Thus I end up with something like: : ens11: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master i40e state UP mode DEFAULT qlen 1000 link/ether 3c:fd:fe:9d:a1:38 brd ff:ff:ff:ff:ff:ff vf 0 MAC 00:1a:4a:16:01:52, spoof checking on, link-state auto This *is not* how it happens under libvirt/virt-manager, however. When allocating a VF to a guest under libvirt, a random MAC address is generated and associated with the VF under the guest, but it is not written back to the hypervisor, and is instead left as 00:00:00:00:00:00. I am pretty sure this writing of the MAC address at the hypervisor is causing at least some of the issues I'm seeing, as with the Intel cards, that prevents the guest from changing/adding a new MAC address, which is what happens with the instantiation of a macvlan interface. So can anyone point me to where in the oVirt code this MAC address assignment is occurring? Also curious why oVirt does this assignment, but libvirt does not. Thanks! - jkt On Mon, Feb 22, 2016 at 2:51 PM Jay Turner <jkt(a)iix.net&gt; wrote: