Re: Trouble understanding net config options

[Andreas Plesner Jacobsen <apj@mutt.dk>]

On Wed, Jul 15, 2009 at 06:22:56PM -0500, Michael Jinks wrote:
> >>   # kvm -m 512M -net nic -net tap,name=tap11 -net nic -net
> >> tap,name=tap12 -hda /vmstore/wee -vnc :11 -cdrom
> >> /path/to/my/Windows.iso -boot d
> >
> > The parameter is "ifname", not "name".
> 
> In that case, what does the "name" parameter mean?  Quoting from the
> manpage on my system:
> 
>        -net tap[,vlan=n][,name=name][,fd=h][,ifname=name][,script=file][,down-
>        script=dfile]

No idea, it's not a supported parameter in the kvm-72 I have on this
machine, maybe it's the name in the qemu console for manipulating the
device.

> I tried again, substituting "ifname" for "name" and leaving everything
> else as-is,  That draws an error:
> 
>   device tap11 is already a member of a bridge; can't enslave it to bridge br0.
>   /etc/kvm/kvm-ifup: could not launch network script
>   Could not initialize device 'tap'
> 
> I suppose that's a good sign, but it still leaves me wondering how to
> control which tap connects to which bridge, if I can't attach a guest
> to an existing tap.

You can. Try adding script=no, so the kvm-ifup script does not get run.

-- 
Andreas