[ovs-discuss] LXC, OVS and fdb learning problem

[Ben Pfaff]

On Sun, Sep 28, 2014 at 01:36:17PM +0930, Chris Bennett wrote:
> I've setup LXC with OVS on CentOS7 yesterday and am having problems with
> OVS learning the MAC address of a container.
> 
> I am only seeing ovs-appctl fdb/show <br> reporting the correct port
> id for the container mac address when the container generates an ARP
> reply, either in response to an ARP request from outside the
> container, or synthetically using arping -A.
> 
> A gratuitous arp sent as an 'arp request' by the container doesn't
> result in OVS learning the MAC address on the expected port (but I
> would have expected it to do so).
> 
> Is this likely a configuration error on my behalf?  Or expected
> behaviour?  Any suggestions for troubleshooting this would be much
> appreciated.

If you're not using an OpenFlow controller, then I'd expect OVS to learn
from any packet sent by a VM.