Provided by: openvswitch-common_1.4.0-1ubuntu1_amd64 bug


       ovs-appctl - utility for configuring running Open vSwitch daemons


       ovs-appctl [--target=target | -t target] command [arg...]
       ovs-appctl --help
       ovs-appctl --version


       Open  vSwitch  daemons  accept  certain  commands at runtime to control their behavior and
       query their settings.  Every daemon accepts a common  set  of  commands  documented  under
       COMMON  COMMANDS  below,  and  ovs-vswitchd  in  particular accepts a number of additional
       commands documented in ovs-vswitchd(8).

       The ovs-appctl program provides a simple way to invoke these commands.  The command to  be
       sent  is specified on ovs-appctl's command line as non-option arguments.  ovs-appctl sends
       the command and prints the daemon's response on standard output.

       In normal use only a single option is accepted:

       -t target
              Tells ovs-appctl which daemon to contact.

              If target begins with / it must name a Unix domain socket on which an Open  vSwitch
              daemon  is  listening  for  control  channel  connections.  By default, each daemon
              listens on a Unix domain socket named  /var/run/openvswitch/,  where
              program  is  the  program's  name  and  pid  is  its  process  ID.  For example, if
              ovs-vswitchd      has      PID      123,       it       would       listen       on

              Otherwise,  ovs-appctl  looks for a pidfile, that is, a file whose contents are the
              process   ID   of   a   running   process    as    a    decimal    number,    named
              /var/run/openvswitch/   (The  --pidfile  option  makes  an  Open vSwitch
              daemon create a pidfile.)  ovs-appctl reads the pidfile,  then  looks  for  a  Unix
              socket  named  /var/run/openvswitch/,  where  pid  is replaced by the
              process ID read from the pidfile, and uses that file as if it  had  been  specified
              directly as the target.

              The default target is ovs-vswitchd.


       Every  Open vSwitch daemon supports a common set of commands, which are documented in this

       These commands display daemon-specific commands and the running version.  Note that  these
       commands are different from the --help and --version options that return information about
       the ovs-appctl utility itself.

       help   Lists the commands supported by the target.

              Displays the version and compilation date of the target.

       Open vSwitch has several log levels.  The highest-severity log level is:

       OFF    No message is ever logged at this level, so setting a logging facility's log  level
              to OFF disables logging to that facility.

       The following log levels, in order of descending severity, are available:

       EMER   A major failure forced a process to abort.

       ERR    A high-level operation or a subsystem failed.  Attention is warranted.

       WARN   A low-level operation failed, but higher-level subsystems may be able to recover.

       INFO   Information that may be useful in retrospect when investigating a problem.

       DBG    Information  useful only to someone with intricate knowledge of the system, or that
              would commonly cause too-voluminous log output.  Log messages at this level are not
              logged by default.

       Every  Open vSwitch daemon supports the following commands for examining and adjusting log

              Lists the known logging modules and their current levels.

       vlog/set module[:facility[:level]]
              Sets the logging level for module in facility to level.   The  module  may  be  any
              valid  module  name  (as displayed by the --list option) or the special name ANY to
              set the logging levels for all modules.  The facility may be syslog or  console  to
              set  the  levels  for logging to the system log or to the console, respectively, or
              ANY to set the logging levels for both facilities.   If  it  is  omitted,  facility
              defaults  to  ANY.   The  level  must be one of off, emer, err, warn, info, or dbg,
              designating the minimum severity of a message for  it  to  be  logged.   If  it  is
              omitted, level defaults to dbg.

       vlog/set PATTERN:facility:pattern
              Sets  the  log  pattern  for facility to pattern.  Each time a message is logged to
              facility, pattern determines the message's formatting.  Most characters in  pattern
              are  copied literally to the log, but special escapes beginning with % are expanded
              as follows:

              %A     The name of the application logging the message, e.g. ovs-vswitchd.

              %c     The name of the module (as shown by ovs-appctl --list) logging the message.

              %d     The current date and time in ISO 8601 format (YYYY-MM-DD HH:MM:SS).

                     The current date and time in the specified  format,  which  takes  the  same
                     format as the template argument to strftime(3).

              %m     The message being logged.

              %N     A  serial  number  for  this  message  within  this run of the program, as a
                     decimal number.  The first message a program logs has serial number  1,  the
                     second one has serial number 2, and so on.

              %n     A new-line.

              %p     The level at which the message is logged, e.g. DBG.

              %P     The program's process ID (pid), as a decimal number.

              %r     The  number of milliseconds elapsed from the start of the application to the
                     time the message was logged.

              %%     A literal %.

              A few options may appear between the % and the format specifier character, in  this

              -      Left   justify  the  escape's  expansion  within  its  field  width.   Right
                     justification is the default.

              0      Pad the field to the field width  with  0s.   Padding  with  spaces  is  the

              width  A  number specifies the minimum field width.  If the escape expands to fewer
                     characters than width then it is padded to fill the field width.   (A  field
                     wider than width is not truncated to fit.)

              The  default  pattern  for  console output is %d{%b %d %H:%M:%S}|%05N|%c|%p|%m; for
              syslog output, %05N|%c|%p|%m.

              Causes the daemon to close and reopen its log file.  (This is useful after rotating
              log files, to cause a new log file to be used.)

              This  has  no  effect if the target application was not invoked with the --log-file


       -h, --help
              Prints a brief help message to the console.

       -V, --version
              Prints version information to the console.


       The protocol used to speak to Open vSwitch daemons does not contain a  quoting  mechanism,
       so command arguments should not generally contain white space.


       ovs-appctl   can   control  the  following  daemons:  ovs-vswitchd(8),  ovs-controller(8),