queues on \fIport\fR; if only \fIport\fR is omitted, then statistics
are printed for \fIqueue\fR on every port where it exists.
.
-.TP
-\fBadd\-flow \fIswitch flow\fR
-Add the flow entry as described by \fIflow\fR to the \fIswitch\fR's
-tables. The flow entry is in the format described in \fBFlow Syntax\fR,
-below.
-.
-.TP
-\fBadd\-flows \fIswitch file\fR
-Add the flow entries listed in \fIfile\fR, or supplied on \fBstdin\fR
-if \fIfile\fR is \fB\-\fR, to \fIswitch\fR's
-tables. Each line in \fIfile\fR is a flow entry in the format
-described in \fBFlow Syntax\fR, below.
-.
-.TP
-\fBmod\-flows \fIswitch flow\fR
-Modify the actions in entries from the \fIswitch\fR's tables
-that match \fIflow\fR. When invoked with the \fB\-\-strict\fR option,
-wildcards are not treated as active for matching purposes. See
-\fBFlow Syntax\fR, below, for the syntax of \fIflows\fR.
-.
-.TP
-\fBdel\-flows \fIswitch \fR[\fIflow\fR]
-Deletes entries from the \fIswitch\fR's tables that match
-\fIflow\fR. When invoked with the \fB\-\-strict\fR option, wildcards are
-not treated as active for matching purposes. If \fIflow\fR is
-omitted and the \fB\-\-strict\fR option is not used, all flows in the
-switch's tables are removed. See \fBFlow Syntax\fR, below, for the
-syntax of \fIflows\fR.
+.SS "OpenFlow Switch Flow Table Commands"
+.
+These commands manage the flow table in an OpenFlow switch. In each
+case, \fIflow\fR specifies a flow entry in the format described in
+\fBFlow Syntax\fR, below, and \fIfile\fR is a text file that contains
+zero or more flows in the same syntax, one per line.
+.
+.IP "\fBadd\-flow \fIswitch flow\fR"
+.IQ "\fBadd\-flow \fIswitch \fB\- < \fIfile\fR"
+.IQ "\fBadd\-flows \fIswitch file\fR"
+Add each flow entry to \fIswitch\fR's tables.
+.
+.IP "[\fB\-\-strict\fR] \fBmod\-flows \fIswitch flow\fR"
+.IQ "[\fB\-\-strict\fR] \fBmod\-flows \fIswitch \fB\- < \fIfile\fR"
+Modify the actions in entries from \fIswitch\fR's tables that match
+the specified flows. With \fB\-\-strict\fR, wildcards are not treated
+as active for matching purposes.
+.
+.IP "\fBdel\-flows \fIswitch\fR"
+.IQ "[\fB\-\-strict\fR] \fBdel\-flows \fIswitch \fR[\fIflow\fR]"
+.IQ "[\fB\-\-strict\fR] \fBdel\-flows \fIswitch \fB\- < \fIfile\fR"
+Deletes entries from \fIswitch\fR's flow table. With only a
+\fIswitch\fR argument, deletes all flows. Otherwise, deletes flow
+entries that match the specified flows. With \fB\-\-strict\fR,
+wildcards are not treated as active for matching purposes.
.
.IP "\fBreplace\-flows \fIswitch file\fR"
Reads flow entries from \fIfile\fR (or \fBstdin\fR if \fIfile\fR is
found, 1 means that an error occurred, and 2 means that some
differences were found.
.
+.SS "OpenFlow Switch Monitoring Commands"
+.
.IP "\fBsnoop \fIswitch\fR"
Connects to \fIswitch\fR and prints to the console all OpenFlow
messages received. Unlike other \fBovs\-ofctl\fR commands, if
the configured controller is disconnected, no traffic is sent, so
monitoring will not show any traffic.
.
-.IQ "\fBmonitor \fIswitch\fR [\fImiss-len\fR]"
+.IP "\fBmonitor \fIswitch\fR [\fImiss-len\fR]"
Connects to \fIswitch\fR and prints to the console all OpenFlow
messages received. Usually, \fIswitch\fR should specify a connection
named on \fBovs\-openflowd\fR(8)'s \fB\-l\fR or \fB\-\-listen\fR command line