On Sun, Mar 24, 2013 at 01:21:59PM +0200, Liran Schour wrote: > Ben Pfaff <b...@nicira.com> wrote on 21/03/2013 09:52:24 PM: > > > On Thu, Mar 21, 2013 at 09:07:08AM +0200, Liran Schour wrote: > > > > > > I try to pass metadata to the controller through the following flow: > > > ovs-ofctl add-flow br-int "in_port=5 priority=2 > actions=set_field:123-> > > > metadata,controller(reason=no_match)" > > > > > > I do see the following flow when I do dump-flows: > > > cookie=0x0, duration=310.921s, table=0, n_packets=0, n_bytes=0, > > > idle_age=310, priority=2,in_port=5 actions=load:0x7b-> > OXM_OF_METADATA > > > [],controller(reason=no_match) > > > > > > But when I check in the controller side I see metadata=0. > > > I check the metadata value with 2 different methods: > > > 1. By snooping the communication between switch to controller and > see > > > metadata=0. > > > 2. By using the extract_flow function inside the controller to > retrieve > > > the flow > > > corresponding to the packet_in message. > > > > > > What am I doing wrong here? > > > > I don't know. > > > > I set up a test of my own with Open vSwitch from current "master". I > > added a single flow to the switch, with: > > ovs-ofctl add-flow br0 'actions=load:123->OXM_OF_METADATA > > [],controller,normal' > > Then I set up a simple "controller" to watch for packet-ins: > > ovs-ofctl monitor -P nxm br0 128 > > When I run packets through the switch, I see the metadata fields set > > as I would expect in the packet-ins, e.g. > > NXT_PACKET_IN (xid=0x0): total_len=42 in_port=1 metadata=0x7b > > (via action) data_len=42 (unbuffered) > > > > When I try to monitor the messages between switch to controller through > ovs-ofctl monitor > I do see NXT_PACKET_IN packets with metadata=0x7b but when I try to monitor > the messages through > ovs-ofctl snoop I do see OFPT_PACKET_IN packets with metadata=0. > How can I know which is the real type of the message that goes on the wire? > ( OFPT_PACKET_IN or NXT_PACKET_IN )
"ovs-ofctl snoop" shows the actual OpenFlow messages sent to the controller that is in use, so OFPT_PACKET_IN is the real type going "on the wire" in this case. > When I try to verify it inside the code of ovs-controller it seems that it > gets OFPT_PACKET_IN packet with metadata equals to zero. > Is it possible to pass metadata value with OFPT_PACKET_IN packet? No. OpenFlow 1.0 defines OFPT_PACKET_IN with a fixed format that does not include metadata (because metadata was not invented until OpenFlow 1.1). If you want to get NXT_PACKET_IN instead, then you need to send an NXT_SET_PACKET_IN_FORMAT request specifying NXPIF_NXM as the desired packet-in format. Alternatively you could use OpenFlow 1.2, which uses OXM (which also includes metadata). _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
