On Tue, Mar 06, 2018 at 06:54:30AM +0000, Josh Bailey via discuss wrote:
> Hoping I'm missing something obvious!
> I have a flow like this:
> $ grep CONTROLLER sab-dump-flows.log
> cookie=0x5adc15c0, duration=63.446s, table=3, n_packets=60, n_bytes=3436,
> priority=0 actions=CONTROLLER:96
> I can cause packets to match it, but no packets are output ot the
> tshark -l -n -Q -d tcp.port==40649,openflow -O openflow_v4 -Y
> "openflow_v4.packet_in.total_len>0" -r fa*cap|wc -l
> If I specify any priority other than 0, it works (packets are output to
> controller via packet in messages).
> Is there something special about priority=0 flows and the CONTROLLER action?
Yes, in fact OpenFlow specifies special cases for priority=0 flows that
match no fields. It calls these "table-miss" flows, see e.g. section
5.4 in OpenFlow 1.5.1. Open vSwitch has some explicit special-case code
for dealing with them.
I can't think of a particular reason why this special case would make a
difference for you. Maybe there is a bug. Do you have a way for us to
Did you try "ofproto/trace"? Maybe it will show a reason why the packet
is not sent to the controller.
(I'm at a conference this week, so my schedule is weird.)
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