Hi Ben, Thanks for your reply! Seems the action "write_metadata" is not allowed to set before "Controller", so I tried to use " load:****->NXM_NX_REG*" instead, to pass any data to controller and it worked. I think the usage of metadata is very limited if so. Pls correct me.
Thanks Chao -----Original Message----- From: Ben Pfaff [mailto:b...@nicira.com] Sent: Tuesday, August 25, 2015 1:37 AM To: Chao Hu Cc: discuss@openvswitch.org Subject: Re: [ovs-discuss] a problem about passing metadata in packet-in On Fri, Aug 21, 2015 at 07:51:15PM +0000, Chao Hu wrote: > I'm trying to pass metadata from OVS switch to controller but always get 0. > Anything wrong with my steps? > My test environment is: > OVS: 2.0.2 > OVS-controller: 2.3.1 > OF: OpenFlow1.3 > > My test steps are: > > 1. Make OVS-controller to send a OFPRAW_NXT_SET_PACKET_IN_FORMAT > message to OVS switch, to set the packet-in-format to NXM (Nicira > Extended). As I captured, it's a OFPT_EXPERIMENTER packet and the > content is exactly the same with the packet of running "ovs-ofctl > monitor -P nxm tcp:myip:6653 -O OpenFlow13". Seems Switch do nothing > after received this packet. This is a bad idea. The OpenFlow 1.3 packet-in format is already extensible so there should be no need to change it. > 2. Add a flow to OVS switch: > cookie=0x0, duration=28.019s, table=0, n_packets=0, n_bytes=0, > in_port=2 actions=CONTROLLER:65535,write_metadata:0x11/0xffff > > 3. OVS switch send the packet-in traffic to controller when it matches > above flow, but metadata is 0. The actions above set the metadata after sending the packet to the controller. _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
