Hi Ben,

On 30.09.2016 02:55, Ben Pfaff wrote:
On Thu, Sep 29, 2016 at 12:15:36PM -0700, Han Zhou wrote:
On Thu, Sep 29, 2016 at 11:31 AM, Ben Pfaff <b...@ovn.org> wrote:

When a VM sends an ARP or an ND NS for its own IP address, it is trying to
check for a duplicate address in the network.  OVN needs to suppress the
reply in such a case, otherwise the VM thinks that its address is a
duplicate.

Reported-by: Valentine Sinitsyn <valentine.sinit...@gmail.com>
Reported-at:
http://openvswitch.org/pipermail/dev/2016-September/080037.html
Signed-off-by: Ben Pfaff <b...@ovn.org>

+1

It will also solve a problem when there are nested VMs (or network
namespaces) within the source VM, connected to VM port by a bridge inside,
sending ARP for the VM's IP, they would get duplicated responses.

Thanks for the review.

I'm hoping to hear from Valentine whether this fixes the originally
reported problem in practice.
First of all, thanks for the patch. In fact, we tried a pretty similar approach yesterday, and it seemed to help. Your patch solves the problem as well.

Tested-by: Valentine Sinitsyn <valentine.sinit...@gmail.com>

Best,
Valentine
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