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Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl,
From: |
Arnd Bergmann |
Subject: |
Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible? |
Date: |
Sun, 20 Feb 2011 22:28:55 +0100 |
User-agent: |
KMail/1.12.2 (Linux/2.6.37; KDE/4.3.2; x86_64; ; ) |
On Sunday 20 February 2011, Gerhard Wiesinger wrote:
> >
> > Not sure if this is by design or due to internals of the networking
> > stack, but it looks unintuitive from user perspective. Maybe Arnd can
> > shed a light on this.
The lower device cannot be in bridge mode, because that would make the
logic in the kernel awfully complex. I agree that it's a bit unfortunate,
but it simplified the design a lot.
>
> > Of course, you could also simply offload all that setup to libvirt.
>
> http://wiki.libvirt.org/page/Networking
> But that still needs a bridge on ethernet level and break up the existing
> interface, right?
No. macvtap is a tap that sits on an external interface, you don't
need a bridge if you use it.
> BTW: From: http://virt.kernelnewbies.org/MacVTap
> As of QEMU 0.12:
> qemu -net nic,model=virtio,addr=1a:46:0b:ca:bc:7b -net tap,fd=3 3<>/dev/tap11
> Is there a newer Syntax with tap interfaces possible (QEMU GIT) without
> bash redirects?
I made some suggestions how to integrate it with qemu, but they never got in.
Libvirt makes it a lot easier, though. We discussed that it should be cleaned
up when the networking helper scripts make it into qemu. Not sure if that
ever happened.
Arnd
- [Qemu-devel] Network bridging without adding bridge with brctl, possible?, Gerhard Wiesinger, 2011/02/19
- [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Jan Kiszka, 2011/02/20
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Gerhard Wiesinger, 2011/02/20
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Jan Kiszka, 2011/02/20
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Gerhard Wiesinger, 2011/02/20
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Jan Kiszka, 2011/02/20
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Gerhard Wiesinger, 2011/02/20
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Arnd Bergmann, 2011/02/20
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Gerhard Wiesinger, 2011/02/21
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Jan Kiszka, 2011/02/21
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Arnd Bergmann, 2011/02/21