On Tue, Feb 23, 2016 at 03:13:21PM +0000, Jay Turner wrote: > 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?
https://gerrit.ovirt.org/gitweb?p=vdsm.git;a=blob;f=vdsm/virt/vmdevices/network.py;h=b2fa629c55ff728a964fda9d0ea598ef57676b53;hb=HEAD#l122 > Also curious why oVirt does this assignment, but > libvirt does not. When we start a VM, we want it to see its allocated mac address, regardless of the specific VF that was assigned to it. It would surprise me if virt-manager does not do that, hence I'd love to see the <interface> elemet that it creates for the VF. Regards, Dan. _______________________________________________ Users mailing list [email protected] http://lists.ovirt.org/mailman/listinfo/users
