[libvirt] libvirt passes wrong MAC address to KVM

[Nikola Ciprich]

hmmm, I'm sorry, it was my fault, stupid mistake in one of scripts :(
so it was false alert, libvirt is innocent...
sorry for inconvenience...
BW
nik

On Tue, Jun 17, 2008 at 12:09:03PM -0400, Daniel Veillard wrote:
> On Tue, Jun 17, 2008 at 04:18:59PM +0200, Nikola Ciprich wrote:
> > Hi all,
> > I think there could be a bug in libvirt passing MAC address to KVM.
> > If I have following in my xml config:
> > <interface type="bridge">
> >     <source bridge="br0"/>
> >          <mac address="00:16:3e:0d:24:00"/>
> > </interface>
> > 
> > and start the domain (I'm using python binding btw), qemu is then executed with following parameter:
> > 
> > ... -net nic,macaddr=00:16:3e:18:24:00,vlan=0 ...
> > 
> > MAC address given in config is not used by any other machine. Does somebody have a tip on where the problem could be?
> > I'm using libvirt-0.4.3.
> 
>   Hum, I can't really reproduce this. I used a definition like:
> 
>     <interface type='network'>
>       <mac address='00:16:3e:0d:24:00'/>
>       <source network='default'/>
>       <target dev='vnet0'/>
>     </interface>
> 
> since i don't have bridging set. When starting the guest with 0.4.2 I see
> 
> /usr/bin/qemu-kvm -M pc -m 512 -smp 1 -monitor pty -boot c -hda /virt/test-mac.img -net nic,macaddr=00:16:3e:0d:24:00,vlan=0 -net tap,fd=14,script=,vlan=0,ifname=vnet0 -usb -vnc 127.0.0.1:0 -k en-us
> 
> when starting with 0.4.3 I see
> 
> /usr/bin/qemu-kvm -S -M pc -m 512 -smp 1 -name test-mac -monitor pty -boot c -drive file=/virt/test-mac.img,if=ide,index=0,boot=on -drive file=,if=ide,media=cdrom,index=2 -net nic,macaddr=00:16:3e:0d:24:00,vlan=0 -net tap,fd=13,script=,vlan=0,ifname=vnet0 -serial none -parallel none -usb -vnc 127.0.0.1:0 -k en-us
> 
> but in both cases the MAC parsing looks correct and properly provided down
> to qemu-kvm . Could you double check with virsh directly (though i don't see
> how python could scramble just that part of the XML description) using
> virsh dumpxml and virsh create ...
> Also testing with a network type of setting may help finding what is happening
> precisely here
> 
>   thanks,
> 
> Daniel
> 
> -- 
> Red Hat Virtualization group http://redhat.com/virtualization/
> Daniel Veillard      | virtualization library  http://libvirt.org/
> veillard at redhat.com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
> http://veillard.com/ | Rpmfind RPM search engine  http://rpmfind.net/
> 

-- 
-------------------------------------
Nikola CIPRICH
LinuxBox.cz, s.r.o.
28. rijna 168, 709 01 Ostrava

tel.:   +420 596 603 142
fax:    +420 596 621 273
mobil:  +420 777 093 799
www.linuxbox.cz

mobil servis: +420 737 238 656
email servis: servis at linuxbox.cz
-------------------------------------