[vbox-dev] How should "promiscuous mode" work ?
klaus.espenlaub at oracle.com
Thu May 12 06:42:03 PDT 2011
On 12.05.2011 14:07, Alexey Eromenko wrote:
> Since the work on UDP Tunnel mode is now complete, we would like to
> know what the new "promiscuous mode" supposed to do ?
This affects the behavior of the virtual switch used by Internal
Networking, Bridged and Host Only. The executive summary is that one can
now make a VM's switch port receive traffic targeted for other VMs or
even the host in addition to the normal traffic.
It probably needs some better name, because it is only indirectly
related to promiscuous mode - if the VM's network adapter isn't in
promiscuous mode we go back to normal switch behavior as the VM wouldn't
see the extra packets anyway.
In general it's something 99% of the users should never touch or need,
but can be handy in case an expert wants to diagnose the cause of
certain network problems.
> Isn't it a feature of guest network drivers ?
Nope. See above.
> <para>GUI: added setting for the promiscuous mode policy for
> internal networks, bridged networks and host-only networks</para>
The functionality has been added to the API a while ago. Normal business.
> Which changes will be required for the UDP Tunnel patch, if any ?
None, as the UDP Tunnel transport doesn't go trough the virtual switch
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