Re: [Qemu-devel] -net interface association behavior change in current -git.

[Markus Armbruster <armbru@redhat.com>]

Rob Landley <rob@landley.net> writes:

> In 1.14.0, if I did this:
>
>   qemu -net nic,blah -net user -net nic,blah -net tun,blah
>
> Then the first nic would be -net user, and the second nic would be -net
> tun.    In current -git, -net user attaches to the second interface and
> -net tun attaches to the first, I.E. the order is reversed.
>
> Either way the first -nic becomes eth0 in Linux and the second becomes
> eth1 (I can manually assign mac addresses in order to confirm which is
> which), but eth0 used to be the -net user interface and now eth1 is the
> -net user interface.
>
> I bisected this to commit 60c07d933c66c4b30a83b but I don't know why it
> changed the behavior, and I can't find _documentation_ on having
> multiple interfaces transports hooked up to the same qemu instance
> anyway.  (It used to work, but possibly that was an accident?)
>
> Any ideas?

Does it happen with -device and -netdev as well?

See docs/qdev-device-use.txt for how to go from -net to -device.