On Fri, Sep 2, 2011 at 8:24 AM, Ben Pfaff <b...@nicira.com> wrote: > The in_port is also important when the packet_out's actions include an > output to OFPP_FLOOD.
[Apologies if I'm being pedantic, but some of this is a little subtle.] Fwiw, the in_port is actually used as a parameter to all output port actions. In openflow, there is an explicit rule that the output port cannot be the same as the input port, to prevent flooding (if you really want to send out the input port, you can use OFPP_IN_PORT). Also, as Ben mentioned, OFPP_FLOOD and OFPP_ALL both mean "except the input port". So, this is why there is an in_port parameter for both ofp_packet_out and ofp_flow_mod. If the packet is not coming from a physical port, e.g., if it's coming from the controller, the right thing to do is to set the inport to OFPP_NONE. - Rob . _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
