Re: [Qemu-devel] using -net dump with tap networking

[Stefan Hajnoczi]

On Tue, Feb 19, 2013 at 09:16:56PM +0100, Laszlo Ersek wrote:
> On 02/19/13 18:50, Markus Armbruster wrote:
> 
> > Your example uses -net to connect additional backends to the hubport.
> > If I understand you correctly, you can't use -netdev to do that.
> > Ignorant question: fundamental reason or just not implemented?
> In order to take a stab at your question at last:
> - the two (parallel, opposing) links created in (3) connect two backends,
> - "-netdev" does not set the peer link in the backend, so you cannot use
> that,
> - "-device" *would* set the links in both directions, but it's for
> creating frontends.
> 
> IOW (3) is unique because it links backend to backend.

Right.  -netdev doesn't allow you to specify a peer, only NICs (-device)
do that.

This means there is no way to hook up -netdev dump with -netdev hubport,
they are both -netdevs :(.

This is why I said it's just playing games with syntax.  I don't think
it buys us anything in the end.

Stefan