Multicast (was: Re: [fedora-virt] Multicast on qemu-kvm?)

James Hubbard jameshubbard at
Tue Sep 22 14:10:22 UTC 2009

On Tue, Sep 22, 2009 at 10:03 AM, Richard W.M. Jones <rjones at> wrote:
> AIUI multicast between guests requires support in the router, which in
> this case would be the host bridge device, eg. virbr0, or possibly
> dnsmasq.
> I have absolutely no idea if the Linux bridge device can do this though.
> Do we have any test programs that can test this?  The only one I'm
> aware of is udpcast.

The following link is something that my co-worker found.  It will only
test a single group.

I've been meaning to write a program to test large numbers of groups,
but haven't gotten around to it.

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