Re: [Qemu-devel] net: RFC New Socket-Based, Switched Network Backend (QDES)

[Stefan Hajnoczi]

On Mon, Nov 26, 2012 at 6:19 PM, Mike Lovell <address@hidden> wrote:
> i think it does still make sense to implement it in QEMU. there isn't a
> problem with multiple processes using the same multicast address. the
> net_socket_mcast_create function in socket.c already sets the
> IP_MULTICAST_LOOP option which makes it so packets get looped back and also
> delivered to processes on the same host. that is why there is a check in
> qdes_receive to see if the sender is the localAddr and drop it if it is. the
> big advantage i see to implementing VXLAN inside QEMU is that it can be done
> without any escalated privileges and without reconfiguring the hosts network
> configuration.

The part I'm wondering about with VXLAN multicast is whether all QEMU
processes on the host need to receive on the same well-known UDP port.
 Not sure if that's possible with the sockets API.

Stefan