.SS "VLOG COMMANDS"
These commands manage \fB\*(PN\fR's logging settings.
.IP "\fBvlog/set\fR [\fIspec\fR]"
Sets logging levels.  Without any \fIspec\fR, sets the log level for
every module and facility to \fBdbg\fR.  Otherwise, \fIspec\fR is a
list of words separated by spaces or commas or colons, up to one from
each category below:
.
.RS
.IP \(bu
A valid module name, as displayed by the \fBvlog/list\fR command on
\fBovs\-appctl\fR(8), limits the log level change to the specified
module.
.
.IP \(bu
\fBsyslog\fR, \fBconsole\fR, or \fBfile\fR, to limit the log level
change to only to the system log, to the console, or to a file,
respectively.
.
.IP \(bu 
\fBoff\fR, \fBemer\fR, \fBerr\fR, \fBwarn\fR, \fBinfo\fR, or
\fBdbg\fR, to control the log level.  Messages of the given severity
or higher will be logged, and messages of lower severity will be
filtered out.  \fBoff\fR filters out all messages.  See
\fBovs\-appctl\fR(8) for a definition of each log level.
.RE
.
.IP
Case is not significant within \fIspec\fR.
.IP
Regardless of the log levels set for \fBfile\fR, logging to a file
will not take place unless \fB\*(PN\fR was invoked with the
\fB\-\-log\-file\fR option.
.IP
For compatibility with older versions of OVS, \fBany\fR is accepted as
a word but has no effect.
.RE
.IP "\fBvlog/set PATTERN:\fIfacility\fB:\fIpattern\fR"
Sets the log pattern for \fIfacility\fR to \fIpattern\fR.  Refer to
\fBovs\-appctl\fR(8) for a description of the valid syntax for \fIpattern\fR.
.
.IP "\fBvlog/list\fR"
Lists the supported logging modules and their current levels.
.
.IP "\fBvlog/reopen\fR"
Causes \fB\*(PN\fR to close and reopen its log file.  (This is useful
after rotating log files, to cause a new log file to be used.)
.IP
This has no effect unless \fB\*(PN\fR was invoked with the
\fB\-\-log\-file\fR option.