[ovs-discuss] Drops in OVS

[Ben Pfaff]

On Fri, Jul 31, 2015 at 05:38:12AM +0530, Abhishek Verma wrote:
> When i add a flow rule which matches on some source IP, dest IP and i give
> a output port as an action, then if i see the packet counter incrementing
> then can i be sure that the packet was successfully sent out by OVS?
> 
> Is the counter incremented in the ingress pipeline or the egress? That is,
> is it possible that the counter was incremented, and then OVS later dropped
> it because of some reason?

Flow counters means that the flow processed the packet, but that doesn't
guarantee that every action taken by the flow succeeded.  If the flow
outputs to 100 different ports, the counter will be incremented whether
0 or 100 or any other number of those outputs were successful.