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Date: Mon, 08 Jun 2009 14:18:04 -0500
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: Re: [Qemu-devel] [PATCH 6/7] virtio-net: Add new RX filter controls
References: <20090605204647.3355.81929.stgit@kvm.aw>	<20090605204718.3355.28647.stgit@kvm.aw>	<20090606204845.GC26877@redhat.com>
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To: Alex Williamson <alex.williamson@hp.com>
Cc: qemu-devel@nongnu.org, "Michael S. Tsirkin" <mst@redhat.com>

Alex Williamson wrote:
> e1000 also allows the driver to selectively enable/disable RX of
> packets to the broadcast address.  This is replicated with the
> all/no-bcast options.  Finally, there may be cases where we want to
> receive only unicast or only multicast address for special purpose
> network devices.  This is provided by the nouni and nomulti options.
> A proprietary guest know as DMX intends to make use of these extra
> modes.  Are there any other interesting, useful and lightweight packet
> filters we could implement?  Thanks,
>   

I've been thinking about whether doing VLAN filtering/tagging within 
QEMU would make sense.  It could potentially simplify bridge setups 
tremendously.  Today, if you want to isolate VMs on separate vlans, it 
involves creating multiple bridges which gets ugly quickly.

Of course, for that to be useful, it should happen at the generic 
networking layer in QEMU, not specific to virtio-net.

Regards,

Anthony Liguori

> Alex
>
>
>