+This option is incompatible with \fB\-N\fR or \fB\-\-normal\fR and
+with \fB\-H\fR or \fB\-\-hub\fR. If more than one is specified then
+this option takes precedence.
+.IP
+This option may be useful for testing or debugging quality of service
+setups.
+.
+.IP "\fB\-Q \fIport-name\fB:\fIqueue-id\fR"
+.IP "\fB\-\-port\-queue \fIport-name\fB:\fIqueue-id\fR"
+Configures packets received on the port named \fIport-name\fR
+(e.g. \fBeth0\fR) to be output on OpenFlow queue ID \fIqueue-id\fR
+(specified as a decimal number). For the specified port, this option
+overrides the default specified on \fB\-q\fR or \fB\-\-queue\fR.
+.IP
+This option may be specified any number of times with different
+\fIport-name\fR arguments.
+.IP
+This option is incompatible with \fB\-N\fR or \fB\-\-normal\fR and
+with \fB\-H\fR or \fB\-\-hub\fR. If more than one is specified then
+this option takes precedence.
+.IP
+This option may be useful for testing or debugging quality of service
+setups.