On 04/25/11 11:30, Alex Williamson wrote: > # modprobe -r igbvf > # ip link set eth2 vf 6 mac 02:00:10:91:73:01 > # modprobe igbvf > # dmesg | grep "igbvf 0000\:01\:11.5\: Address\:" > igbvf 0000:01:11.5: Address: d2:c8:17:d6:97:f7 > igbvf 0000:01:11.5: Address: 4e:ee:2a:d8:12:7c > igbvf 0000:01:11.5: Address: 02:00:10:91:73:01 > # modprobe -r igbvf > # echo 1 > /sys/bus/pci/devices/0000:01:11.5/reset > # modprobe igbvf > # dmesg | grep "igbvf 0000\:01\:11.5\: Address\:" > igbvf 0000:01:11.5: Address: d2:c8:17:d6:97:f7 > igbvf 0000:01:11.5: Address: 4e:ee:2a:d8:12:7c > igbvf 0000:01:11.5: Address: 02:00:10:91:73:01 > igbvf 0000:01:11.5: Address: 02:00:10:91:73:01 > > So now it sticks. You're going to get random mac addresses on the VFs > every time you reload the igb driver (ie. ever boot) anyway (at least > with these sr-iov cards), so if you need consistent macs, they probably > need to be set before launching the VM anyway. Thanks, > > Alex > Ok, I was able to repeat the above commands from the host command line. However, when qemu-kvm starts the MAC is reset. # ip link show | less 2: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000 link/ether 00:1b:21:98:b7:10 brd ff:ff:ff:ff:ff:ff vf 0 MAC 02:12:34:56:80:20 --> that's the MAC address I set I start qemu-kvm (unpatched version) and the host side sees the address changed: # ip link show | less 2: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000 link/ether 00:1b:21:98:b7:10 brd ff:ff:ff:ff:ff:ff vf 0 MAC 7a:17:3f:98:0f:db Can you try that aspect on your end - seeing if the MAC address maintains after starting qemu-kvm? David -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html