+.
+.IP \fBset_queue\fB:\fIqueue\fR
+Sets the queue that should be used to \fIqueue\fR when packets are
+output. The number of supported queues depends on the switch; some
+OpenFlow implementations do not support queuing at all.
+.
+.IP \fBpop_queue\fR
+Restores the queue to the value it was before any \fBset_queue\fR
+actions were applied.
+.
+.IP \fBnote:\fR[\fIhh\fR]...
+Does nothing at all. Any number of bytes represented as hex digits
+\fIhh\fR may be included. Pairs of hex digits may be separated by
+periods for readability.