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Re: [Xen-devel] [RFC 2/2] xen-netback: disable multicast and use a random hw MAC address

On Wed, 2014-02-12 at 14:05 -0800, Luis R. Rodriguez wrote:
> > I meant the PV protocol extension which allows guests (netfront) to
> > register to receive multicast frames across the PV ring -- i.e. for
> > multicast to work from the guests PoV.
> Not quite sure I understand, ipv6 works on guests so multicast works,
> so its unclear what you mean by multicast frames across the PV ring.
> Is there any code or or documents I can look at ?

xen/include/public/io/netif.h talks about 'feature-multicast-control'

Looking at it now in the absence of those then flooding is the

> > (maybe that was just an optimisation though and the default is to flood
> > everything, it was a long time ago)
> From a networking perspective everything is being flooded as I've seen
> it so far.

... which is why it works ;-)


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