On Oct 22, 2013, at 2:17 AM, Romil Gupta <romilgupt...@gmail.com> wrote:

> Hi All,
> 
> We are using OVS as neutron plugin to use VLAN/ VXLAN. We found that OVS does 
> multiple unicast to send the ARP request instead of sending via Multicast 
> address. But by default Linux bridge supports Multicast.
> 
> 
> Is there any reason behind why OVS doesn't support Multicast?
> 
The only reason is that support for a multicast control plane never made it 
upstream into OVS. However, there is effort upstream in OVS to synchronize the 
data plane portions of VXLAN, and when that happens, OVS VXLAN will acquire 
multicast support.

FYI: In Havana, you may want to checkout the ML2 plugin with the L2 Population 
MechanismDriver. It does some pretty neat things with regards to programming 
OVS using multiple tables, etc.

Thanks,
Kyle

> 
> Thanks in Advance :)
> 
> 
> Regards,
> Romil 
> 
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