Stefan Hajnoczi <[email protected]> writes: > On Wed, May 11, 2016 at 08:50:54PM +0800, Hu Keping wrote: >> Is there any possible that start qemu with --net=none and then change the >> configuration of the network, say using tap for example? > > Yes. If your machine type supports PCI hotplug then you can use the > netdev_add and device_add commands. This is equivalent to hotplugging a > NIC into a running machine. > > I don't have exact syntax because I haven't tested it, but it should be > similar to using the -netdev tap,id=netdev0 -device e1000,netdev=netdev0 > command-line option syntax.
Aside: we should be able to swap out the network backend without unplugging + plugging the frontend, in a way that looks like unplugging + plugging the network cable, possibly changing to a different network. As far as I know, we can't do that today, but it could be a fun project.
