Hi Jarno,

As part of OVN integration in Openstack, I’ve been trying to setup OpenFlow NAT 
rules and run the system-test-suite 33: system-traffic.at:1396 conntrack - 
simple SNAT. Using the latest (as of 12/15/2015) ovs master branch on Ubuntu 
Linux 4.3 kernels (from kernel.ubuntu.com <http://kernel.ubuntu.com/>) fail 
with the following errors:

> 2015-12-16T03:05:13.945Z|00037|connmgr|INFO|br0<->unix: sending 
> OFPBAC_BAD_TYPE error reply to OFPT_FLOW_MOD message
> 2015-12-16T03:05:13.945Z|00038|vconn|DBG|unix: sent (Success): OFPT_ERROR 
> (OF1.4) (xid=0x2): OFPBAC_BAD_TYPE

related to the flow
in_port=1,ip,action=ct(commit,zone=1,nat(src=10.1.1.240-10.1.1.255)),2

Am I missing some conntrack kernel patches to get the OpenFlow NAT rules 
installed? If yes, how would one get those patches and which kernel images 
would contain them.

Thanks
Amitabha
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