[ovs-discuss] unexpected drop rule is installed in kernel dataplane by OVS

Ben Pfaff blp at ovn.org
Tue Apr 16 20:55:26 UTC 2019


On Mon, Apr 01, 2019 at 04:12:48PM +0200, Premysl Kouril wrote:
> We have upgraded to new version of OpenStack and with new OVS (2.11) we see
> that for some reason - the OVS installs drop rule which drops traffic from
> our DHCP server towards virtual machine. I've checked all open-flow rules
> installed on the OVS and I see absolutely no reason why would OVS install
> such rule into the kernel data plane. Also, on older version of OVS (2.9)
> it behaves correctly and there is no such drop rule installed in data plane
> in our second environment. So the question is - why OVS installs this drop
> rule into kernel data plane?

Usually ofproto/trace is the best way to figure this kind of thing out.
You can read about this command in the ovs-vswitchd manpage.


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