+actually be sent, but side effects such as MAC learning will occur.
+.
+.IP "\fBofproto/trace \fIswitch odp_flow\fR"
+Traces the path of a packet in an imaginary flow through
+\fIswitch\fR. The arguments are:
+.RS
+.IP "\fIswitch\fR"
+The switch on which the packet arrived (one of those listed by
+\fBofproto/list\fR).
+.IP "\fIodp_flow\fR"
+A flow in the form printed by \fBovs\-dpctl\fR(8)'s \fBdump\-flows\fR
+command. This is not an OpenFlow flow: besides other differences, it
+never contains wildcards.
+.RE
+.IP
+\fB\*(PN\fR will respond with extensive information on how a packet
+in \fIodp_flow\fR would be handled if it were received by
+\fIswitch\fR. No packet will actually be sent. Some side effects may
+occur, but MAC learning in particular will not.
+.IP
+This form of \fBofproto/trace\fR cannot determine the complete set of
+datapath actions in some corner cases. If the results say that this
+is the case, rerun \fBofproto/trace\fR supplying a packet in the flow
+to get complete results.