[vbox-dev] Control IP multicast reception via API?

Karoline Haus karolinehaus at yahoo.de
Thu Jul 10 05:49:09 GMT 2014

Do the host-only network interfaces in any way behave differently to the typical tun/tap Ethernet devices Linux offers? I mean in terms of multicast reception. So if I bridge from the physical device to the host-only interface then it should be able to process multicast pakets as well right?

Klaus Espenlaub <klaus.espenlaub at oracle.com> schrieb am 18:20 Dienstag, 8.Juli 2014:


On 08.07.2014 17:42, Karoline Haus wrote:
> Hi there, I was just wondering, if it was possible to control multicast
> reception for VMs via host-only interfaces via the VBOX API? I could not
> find anything but not sure I searched in the right place. Thanks for any
> pointers!

There's nothing in the API controlling this, and the reason is that the 
emulation itself deals with ethernet frames. It couldn't care less what 
they mean. Of course the actual behavior heavily depends on the 
networking mode (NAT definitely doesn't handle multicast in a sensible 
way), and bridged/host only/internal network should be able to handle 
them. Theoretically. Not aware of this getting tested :)


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