Provided by: openvswitch-switch_2.5.0-0ubuntu1_amd64 bug

NAME

       ovs-vsctl - utility for querying and configuring ovs-vswitchd

SYNOPSIS

       ovs-vsctl [options] -- [options] command [args] [-- [options] command [args]]...

DESCRIPTION

       The  ovs-vsctl  program  configures ovs-vswitchd(8) by providing a high-level interface to
       its configuration database.  See ovs-vswitchd.conf.db(5) for  comprehensive  documentation
       of the database schema.

       ovs-vsctl connects to an ovsdb-server process that maintains an Open vSwitch configuration
       database.  Using this connection, it queries and possibly applies changes to the database,
       depending  on the supplied commands.  Then, if it applied any changes, by default it waits
       until ovs-vswitchd has finished  reconfiguring  itself  before  it  exits.   (If  you  use
       ovs-vsctl when ovs-vswitchd is not running, use --no-wait.)

       ovs-vsctl  can  perform  any  number  of commands in a single run, implemented as a single
       atomic transaction against the database.

       The ovs-vsctl command line begins with global options (see  OPTIONS  below  for  details).
       The  global  options are followed by one or more commands.  Each command should begin with
       -- by itself as a command-line argument, to separate it from the following commands.  (The
       -- before the first command is optional.)  The command itself starts with command-specific
       options, if any, followed by the command name and any arguments.  See EXAMPLES  below  for
       syntax examples.

   Linux VLAN Bridging Compatibility
       The ovs-vsctl program supports the model of a bridge implemented by Open vSwitch, in which
       a single bridge supports ports on multiple VLANs.  In this model, each port on a bridge is
       either  a  trunk  port  that  potentially  passes  packets tagged with 802.1Q headers that
       designate VLANs or it is assigned a single implicit VLAN that  is  never  tagged  with  an
       802.1Q header.

       For  compatibility  with software designed for the Linux bridge, ovs-vsctl also supports a
       model in which traffic associated with a given 802.1Q VLAN is segregated into  a  separate
       bridge.  A special form of the add-br command (see below) creates a ``fake bridge'' within
       an Open vSwitch bridge to simulate this behavior.  When such a ``fake bridge'' is  active,
       ovs-vsctl  will  treat  it much like a bridge separate from its ``parent bridge,'' but the
       actual implementation in Open vSwitch uses only a single bridge, with ports  on  the  fake
       bridge  assigned  the implicit VLAN of the fake bridge of which they are members.  (A fake
       bridge for VLAN 0 receives packets that have no 802.1Q tag or a tag with VLAN 0.)

OPTIONS

       The following options affect the behavior ovs-vsctl as a whole.  Some individual  commands
       also accept their own options, which are given just before the command name.  If the first
       command on the command line has options, then those options must  be  separated  from  the
       global options by --.

       --db=server
              Sets  server  as  the  database  server  that ovs-vsctl contacts to query or modify
              configuration.  The default is unix:/var/run/openvswitch/db.sock.  server must take
              one of the following forms:

              ssl:ip:port
                     The  specified SSL port on the host at the given ip, which must be expressed
                     as an IP address (not a DNS name) in IPv4 or IPv6 address format.  If ip  is
                     an  IPv6  address,  then wrap ip with square brackets, e.g.: ssl:[::1]:6640.
                     The --private-key, --certificate, and --ca-cert options are  mandatory  when
                     this form is used.

              tcp:ip:port
                     Connect  to  the given TCP port on ip, where ip can be IPv4 or IPv6 address.
                     If ip is  an  IPv6  address,  then  wrap  ip  with  square  brackets,  e.g.:
                     tcp:[::1]:6640.

              unix:file
                     On POSIX, connect to the Unix domain server socket named file.

                     On Windows, connect to a localhost TCP port whose value is written in file.

              pssl:port[:ip]
                     Listen  on the given SSL port for a connection.  By default, connections are
                     not bound to a particular local IP address and it listens only on IPv4  (but
                     not  IPv6) addresses, but specifying ip limits connections to those from the
                     given ip, either IPv4 or IPv6 address.  If ip is an IPv6 address, then  wrap
                     ip   with   square  brackets,  e.g.:  pssl:6640:[::1].   The  --private-key,
                     --certificate, and --ca-cert options are mandatory when this form is used.

              ptcp:port[:ip]
                     Listen on the given TCP port for a connection.  By default, connections  are
                     not  bound to a particular local IP address and it listens only on IPv4 (but
                     not IPv6) addresses, but ip may be specified to listen only for  connections
                     to  the  given  ip,  either IPv4 or IPv6 address.  If ip is an IPv6 address,
                     then wrap ip with square brackets, e.g.: ptcp:6640:[::1].

              punix:file
                     On POSIX, listen  on  the  Unix  domain  server  socket  named  file  for  a
                     connection.

                     On  Windows, listen on a kernel chosen TCP port on the localhost. The kernel
                     chosen TCP port value is written in file.

       --no-wait
              Prevents ovs-vsctl from waiting for ovs-vswitchd to reconfigure itself according to
              the  modified database.  This option should be used if ovs-vswitchd is not running;
              otherwise, ovs-vsctl will not exit until ovs-vswitchd starts.

              This option has no effect if the commands specified do not change the database.

       --no-syslog
              By default, ovs-vsctl logs its arguments and the details of  any  changes  that  it
              makes to the system log.  This option disables this logging.

              This option is equivalent to --verbose=vsctl:syslog:warn.

       --oneline
              Modifies  the  output  format  so  that the output for each command is printed on a
              single line.  New-line characters that would otherwise separate lines  are  printed
              as  \n,  and  any  instances  of  \  that  would otherwise appear in the output are
              doubled.  Prints a blank line for each command that has  no  output.   This  option
              does  not affect the formatting of output from the list or find commands; see Table
              Formatting Options below.

       --dry-run
              Prevents ovs-vsctl from actually modifying the database.

       -t secs
       --timeout=secs
              By default, or with a secs of 0, ovs-vsctl waits forever for a  response  from  the
              database.   This  option  limits  runtime  to  approximately  secs seconds.  If the
              timeout expires, ovs-vsctl will exit with  a  SIGALRM  signal.   (A  timeout  would
              normally  happen  only  if  the  database  cannot be contacted, or if the system is
              overloaded.)

       --retry
              Without this option, if ovs-vsctl connects outward  to  the  database  server  (the
              default)  then  ovs-vsctl  will  try  to connect once and exit with an error if the
              connection fails (which usually means that ovsdb-server is not running).

              With this option, or if --db specifies that ovs-vsctl should listen for an incoming
              connection  from  the database server, then ovs-vsctl will wait for a connection to
              the database forever.

              Regardless of this setting, --timeout always limits how long ovs-vsctl will wait.

   Table Formatting Options
       These options control the format of output from the list and find commands.

       -f format
       --format=format
              Sets the type of table formatting.  The following types of format are available:

              table  2-D text tables with aligned columns.

              list (default)
                     A list with one column per line and rows separated by a blank line.

              html   HTML tables.

              csv    Comma-separated values as defined in RFC 4180.

              json   JSON format as defined in RFC 4627.   The  output  is  a  sequence  of  JSON
                     objects,  each  of which corresponds to one table.  Each JSON object has the
                     following members with the noted values:

                     caption
                            The table's caption.  This member is omitted  if  the  table  has  no
                            caption.

                     headings
                            An  array with one element per table column.  Each array element is a
                            string giving the corresponding column's heading.

                     data   An array with one element per table row.  Each  element  is  also  an
                            array  with  one  element  per  table  column.   The elements of this
                            second-level array are the cells that constitute  the  table.   Cells
                            that  represent  OVSDB data or data types are expressed in the format
                            described  in  the  OVSDB  specification;  other  cells  are   simply
                            expressed as text strings.

       -d format
       --data=format
              Sets  the formatting for cells within output tables.  The following types of format
              are available:

              string (default)
                     The simple format described in the Database Values section below.

              bare   The simple format with punctuation stripped  off:  []  and  {}  are  omitted
                     around  sets, maps, and empty columns, items within sets and maps are space-
                     separated, and strings are never quoted.  This  format  may  be  easier  for
                     scripts to parse.

              json   JSON.

              The json output format always outputs cells in JSON format, ignoring this option.

       --no-heading
              This  option  suppresses the heading row that otherwise appears in the first row of
              table output.

       --pretty
              By default, JSON in output is printed as compactly as possible.  This option causes
              JSON  in  output  to be printed in a more readable fashion.  Members of objects and
              elements of arrays are printed one per line, with indentation.

              This option does not affect JSON in tables, which is always printed compactly.

       --bare Equivalent to --format=list --data=bare --no-headings.

   Public Key Infrastructure Options
       -p privkey.pem
       --private-key=privkey.pem
              Specifies a PEM file containing the private key used as  ovs-vsctl's  identity  for
              outgoing SSL connections.

       -c cert.pem
       --certificate=cert.pem
              Specifies  a  PEM  file  containing  a  certificate  that certifies the private key
              specified on -p or --private-key to be trustworthy.  The certificate must be signed
              by  the  certificate  authority  (CA)  that the peer in SSL connections will use to
              verify it.

       -C cacert.pem
       --ca-cert=cacert.pem
              Specifies a PEM file containing the CA certificate that  ovs-vsctl  should  use  to
              verify  certificates  presented  to  it  by  SSL  peers.   (This  may  be  the same
              certificate that SSL peers use  to  verify  the  certificate  specified  on  -c  or
              --certificate, or it may be a different one, depending on the PKI design in use.)

       -C none
       --ca-cert=none
              Disables  verification  of  certificates presented by SSL peers.  This introduces a
              security risk, because it means that certificates cannot be verified to be those of
              known trusted hosts.

       --bootstrap-ca-cert=cacert.pem
              When  cacert.pem exists, this option has the same effect as -C or --ca-cert.  If it
              does not exist, then ovs-vsctl will attempt to obtain the CA certificate  from  the
              SSL  peer  on its first SSL connection and save it to the named PEM file.  If it is
              successful, it will immediately drop the connection and reconnect, and from then on
              all  SSL  connections  must  be  authenticated  by  a  certificate signed by the CA
              certificate thus obtained.

              This option exposes the SSL connection to a man-in-the-middle attack obtaining  the
              initial CA certificate, but it may be useful for bootstrapping.

              This  option is only useful if the SSL peer sends its CA certificate as part of the
              SSL certificate chain.  The SSL protocol does not require the server to send the CA
              certificate.

              This option is mutually exclusive with -C and --ca-cert.

       --peer-ca-cert=peer-cacert.pem
              Specifies  a  PEM file that contains one or more additional certificates to send to
              SSL peers.  peer-cacert.pem should be the CA certificate used to  sign  ovs-vsctl's
              own  certificate,  that  is,  the certificate specified on -c or --certificate.  If
              ovs-vsctl's certificate  is  self-signed,  then  --certificate  and  --peer-ca-cert
              should specify the same file.

              This  option  is  not useful in normal operation, because the SSL peer must already
              have the CA certificate  for  the  peer  to  have  any  confidence  in  ovs-vsctl's
              identity.   However,  this  offers a way for a new installation to bootstrap the CA
              certificate on its first SSL connection.

       -v[spec]
       --verbose=[spec]
              Sets logging levels.  Without any spec, sets the log level  for  every  module  and
              destination  to  dbg.   Otherwise,  spec  is a list of words separated by spaces or
              commas or colons, up to one from each category below:

              ·      A valid module name, as displayed by the vlog/list command on ovs-appctl(8),
                     limits the log level change to the specified module.

              ·      syslog,  console,  or  file,  to  limit  the log level change to only to the
                     system log, to the console, or to a file,  respectively.   (If  --detach  is
                     specified, ovs-vsctl closes its standard file descriptors, so logging to the
                     console will have no effect.)

                     On Windows platform, syslog is accepted as a word and is only  useful  along
                     with the --syslog-target option (the word has no effect otherwise).

              ·      off,  emer,  err, warn, info, or dbg, to control the log level.  Messages of
                     the given severity or higher will be logged, and messages of lower  severity
                     will  be filtered out.  off filters out all messages.  See ovs-appctl(8) for
                     a definition of each log level.

              Case is not significant within spec.

              Regardless of the log levels set for file, logging to a file will  not  take  place
              unless --log-file is also specified (see below).

              For  compatibility with older versions of OVS, any is accepted as a word but has no
              effect.

       -v
       --verbose
              Sets the maximum logging verbosity level, equivalent to --verbose=dbg.

       -vPATTERN:destination:pattern
       --verbose=PATTERN:destination:pattern
              Sets the log pattern for destination to pattern.   Refer  to  ovs-appctl(8)  for  a
              description of the valid syntax for pattern.

       -vFACILITY:facility
       --verbose=FACILITY:facility
              Sets  the  RFC5424  facility of the log message. facility can be one of kern, user,
              mail, daemon, auth, syslog, lpr, news, uucp, clock, ftp, ntp, audit, alert, clock2,
              local0, local1, local2, local3, local4, local5, local6 or local7. If this option is
              not specified, daemon is used as the default for the local system syslog and local0
              is  used  while  sending  a  message to the target provided via the --syslog-target
              option.

       --log-file[=file]
              Enables logging to a file.  If file is specified, then it is used as the exact name
              for  the  log  file.   The  default  log  file  name  used  if  file  is omitted is
              /var/log/openvswitch/ovs-vsctl.log.

       --syslog-target=host:port
              Send syslog messages to UDP port on host, in addition to the  system  syslog.   The
              host must be a numerical IP address, not a hostname.

       --syslog-method=method
              Specify  method  how  syslog  messages  should be sent to syslog daemon.  Following
              forms are supported:

              ·      libc, use libc syslog() function.  This is the default  behavior.   Downside
                     of using this options is that libc adds fixed prefix to every message before
                     it is actually sent to the syslog daemon over /dev/log UNIX domain socket.

              ·      unix:file, use UNIX domain socket  directly.   It  is  possible  to  specify
                     arbitrary  message format with this option.  However, rsyslogd 8.9 and older
                     versions use hard coded parser  function  anyway  that  limits  UNIX  domain
                     socket use.  If you want to use arbitrary message format with older rsyslogd
                     versions, then use UDP socket to localhost IP address instead.

              ·      udp:ip:port, use UDP socket.   With  this  method  it  is  possible  to  use
                     arbitrary  message  format  also  with  older rsyslogd.  When sending syslog
                     messages over UDP socket extra precaution needs to be  taken  into  account,
                     for example, syslog daemon needs to be configured to listen on the specified
                     UDP port, accidental iptables rules could be interfering with  local  syslog
                     traffic  and  there  are  some  security  considerations  that  apply to UDP
                     sockets, but do not apply to UNIX domain sockets.

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

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

COMMANDS

       The commands implemented by ovs-vsctl are described in the sections below.

   Open vSwitch Commands
       These commands work with an Open vSwitch as a whole.

       init   Initializes the Open vSwitch database, if it is empty.  If the database has already
              been initialized, this command has no effect.

              Any  successful  ovs-vsctl  command  automatically  initializes  the  Open  vSwitch
              database if it is empty.  This command  is  provided  to  initialize  the  database
              without executing any other command.

       show   Prints a brief overview of the database contents.

       emer-reset
              Reset  the configuration into a clean state.  It deconfigures OpenFlow controllers,
              OVSDB servers, and SSL, and deletes port mirroring, fail_mode, NetFlow, sFlow,  and
              IPFIX  configuration.   This  command  also  removes all other-config keys from all
              database records, except that other-config:hwaddr is preserved if it is present  in
              a Bridge record.  Other networking configuration is left as-is.

   Bridge Commands
       These commands examine and manipulate Open vSwitch bridges.

       [--may-exist] add-br bridge
              Creates  a new bridge named bridge.  Initially the bridge will have no ports (other
              than bridge itself).

              Without --may-exist, attempting to create a bridge that exists is an  error.   With
              --may-exist, this command does nothing if bridge already exists as a real bridge.

       [--may-exist] add-br bridge parent vlan
              Creates  a  ``fake  bridge''  named  bridge within the existing Open vSwitch bridge
              parent, which must already exist and must not itself be a  fake  bridge.   The  new
              fake  bridge  will  be  on 802.1Q VLAN vlan, which must be an integer between 0 and
              4095.  The parent bridge must not already have a fake bridge for  vlan.   Initially
              bridge will have no ports (other than bridge itself).

              Without  --may-exist,  attempting to create a bridge that exists is an error.  With
              --may-exist, this command does nothing if bridge already exists as  a  VLAN  bridge
              under parent for vlan.

       [--if-exists] del-br bridge
              Deletes bridge and all of its ports.  If bridge is a real bridge, this command also
              deletes any fake bridges that were created with bridge as parent, including all  of
              their ports.

              Without --if-exists, attempting to delete a bridge that does not exist is an error.
              With --if-exists, attempting to delete a bridge that does not exist has no effect.

       [--real|--fake] list-br
              Lists all existing real and fake bridges on standard output, one  per  line.   With
              --real or --fake, only bridges of that type are returned.

       br-exists bridge
              Tests  whether  bridge  exists  as  a  real or fake bridge.  If so, ovs-vsctl exits
              successfully with exit code 0.  If not, ovs-vsctl exits  unsuccessfully  with  exit
              code 2.

       br-to-vlan bridge
              If  bridge  is a fake bridge, prints the bridge's 802.1Q VLAN as a decimal integer.
              If bridge is a real bridge, prints 0.

       br-to-parent bridge
              If bridge is a fake bridge, prints the name of its parent bridge.  If bridge  is  a
              real bridge, print bridge.

       br-set-external-id bridge key [value]
              Sets  or  clears  an ``external ID'' value on bridge.  These values are intended to
              identify entities external to Open vSwitch with which bridge  is  associated,  e.g.
              the  bridge's identifier in a virtualization management platform.  The Open vSwitch
              database schema specifies well-known key values, but key and  value  are  otherwise
              arbitrary strings.

              If  value  is  specified,  then  key  is  set  to value for bridge, overwriting any
              previous value.  If value is omitted, then key is  removed  from  bridge's  set  of
              external IDs (if it was present).

              For  real bridges, the effect of this command is similar to that of a set or remove
              command in the external-ids column of the  Bridge  table.   For  fake  bridges,  it
              actually modifies keys with names prefixed by fake-bridge- in the Port table.

       br-get-external-id bridge [key]
              Queries  the  external IDs on bridge.  If key is specified, the output is the value
              for that key or the empty string if key is unset.  If key is omitted, the output is
              key=value, one per line, for each key-value pair.

              For real bridges, the effect of this command is similar to that of a get command in
              the external-ids column of the Bridge table.  For fake  bridges,  it  queries  keys
              with names prefixed by fake-bridge- in the Port table.

   Port Commands
       These  commands  examine and manipulate Open vSwitch ports.  These commands treat a bonded
       port as a single entity.

       list-ports bridge
              Lists all of the ports within bridge on standard output, one per line.   The  local
              port bridge is not included in the list.

       [--may-exist] add-port bridge port [column[:key]=value]...
              Creates on bridge a new port named port from the network device of the same name.

              Optional  arguments set values of column in the Port record created by the command.
              For example, tag=9 would make the port an access port for VLAN 9.   The  syntax  is
              the same as that for the set command (see Database Commands below).

              Without  --may-exist,  attempting  to  create a port that exists is an error.  With
              --may-exist, this command does nothing if port already exists on bridge and is  not
              a bonded port.

       [--fake-iface] add-bond bridge port iface... [column[:key]=value]...
              Creates  on  bridge  a  new port named port that bonds together the network devices
              given as each iface.  At least two interfaces must be named.  If the interfaces are
              DPDK enabled then the transaction will need to include operations to explicitly set
              the interface type to 'dpdk'.

              Optional arguments set values of column in the Port record created by the  command.
              The syntax is the same as that for the set command (see Database Commands below).

              With  --fake-iface,  a  fake  interface with the name port is created.  This should
              only be used for compatibility with legacy software that requires it.

              Without --may-exist, attempting to create a port that exists  is  an  error.   With
              --may-exist,  this  command does nothing if port already exists on bridge and bonds
              together exactly the specified interfaces.

       [--if-exists] del-port [bridge] port
              Deletes port.  If bridge is omitted, port is removed from whatever bridge  contains
              it; if bridge is specified, it must be the real or fake bridge that contains port.

              Without  --if-exists,  attempting to delete a port that does not exist is an error.
              With --if-exists, attempting to delete a port that does not exist has no effect.

       [--if-exists] --with-iface del-port [bridge] iface
              Deletes the port named iface or that has an interface named iface.   If  bridge  is
              omitted,  the  port  is  removed  from  whatever  bridge  contains it; if bridge is
              specified, it must be the real or fake bridge that contains the port.

              Without --if-exists, attempting to delete the port for an interface that  does  not
              exist  is  an  error.   With  --if-exists,  attempting  to  delete  the port for an
              interface that does not exist has no effect.

       port-to-br port
              Prints the name of the bridge that contains port on standard output.

   Interface Commands
       These commands examine the interfaces attached to an Open vSwitch bridge.  These  commands
       treat  a  bonded  port  as a collection of two or more interfaces, rather than as a single
       port.

       list-ifaces bridge
              Lists all of the interfaces within bridge on standard output, one  per  line.   The
              local port bridge is not included in the list.

       iface-to-br iface
              Prints the name of the bridge that contains iface on standard output.

   OpenFlow Controller Connectivity
       ovs-vswitchd  can  perform  all  configured  bridging  and switching locally, or it can be
       configured to communicate with one or more external OpenFlow controllers.  The  switch  is
       typically  configured to connect to a primary controller that takes charge of the bridge's
       flow table to implement a network policy.  In addition, the switch can  be  configured  to
       listen  to  connections  from service controllers.  Service controllers are typically used
       for occasional support and maintenance, e.g. with ovs-ofctl.

       get-controller bridge
              Prints the configured controller target.

       del-controller bridge
              Deletes the configured controller target.

       set-controller bridge target...
              Sets the configured controller target or targets.  Each target may use any  of  the
              following forms:

              ssl:ip[:port]
              tcp:ip[:port]
                     The  specified  port on the host at the given ip, which must be expressed as
                     an IP address (not a DNS name) in IPv4 or IPv6 address  format.   Wrap  IPv6
                     addresses   in   square   brackets,   e.g.  tcp:[::1]:6653.   For  ssl,  the
                     --private-key, --certificate, and --ca-cert options are mandatory.

                     If port is not specified, it defaults to 6653.

              unix:file
                     On POSIX, a Unix domain server socket named file.

                     On Windows, a localhost TCP port written in file.

              pssl:[port][:ip]
              ptcp:[port][:ip]
                     Listens for OpenFlow connections on port.  The default  port  is  6653.   By
                     default,  connections  are  allowed from any IPv4 address.  Specify ip as an
                     IPv4 address or a bracketed IPv6 address (e.g. ptcp:6653:[::1]).  DNS  names
                     may  not  be used.  For pssl, the --private-key,--certificate, and --ca-cert
                     options are mandatory.

              punix:file
                     Listens for OpenFlow connections on the  Unix  domain  server  socket  named
                     file.

     Controller Failure Settings

       When  a  controller is configured, it is, ordinarily, responsible for setting up all flows
       on the switch.   Thus,  if  the  connection  to  the  controller  fails,  no  new  network
       connections can be set up.  If the connection to the controller stays down long enough, no
       packets can pass through the switch at all.

       If the value is standalone, or if neither of these settings is set, ovs-vswitchd will take
       over  responsibility  for  setting  up  flows  when  no message has been received from the
       controller for three times the inactivity probe  interval.   In  this  mode,  ovs-vswitchd
       causes  the  datapath  to  act  like  an  ordinary MAC-learning switch.  ovs-vswitchd will
       continue to retry connecting to the controller in the background and, when the  connection
       succeeds, it discontinues its standalone behavior.

       If  this  option  is set to secure, ovs-vswitchd will not set up flows on its own when the
       controller connection fails.

       get-fail-mode bridge
              Prints the configured failure mode.

       del-fail-mode bridge
              Deletes the configured failure mode.

       set-fail-mode bridge standalone|secure
              Sets the configured failure mode.

   Manager Connectivity
       These commands manipulate the manager_options column in the Open_vSwitch table and rows in
       the Managers table.  When ovsdb-server is configured to use the manager_options column for
       OVSDB connections (as described in INSTALL.Linux and in the startup scripts provided  with
       Open  vSwitch),  this  allows  the  administrator  to  use ovs-vsctl to configure database
       connections.

       get-manager
              Prints the configured manager(s).

       del-manager
              Deletes the configured manager(s).

       set-manager target...
              Sets the configured manager target or targets.  Each target  may  use  any  of  the
              following forms:

              ssl:ip:port
                     The  specified SSL port on the host at the given ip, which must be expressed
                     as an IP address (not a DNS name) in IPv4 or IPv6 address format.  If ip  is
                     an  IPv6  address,  then wrap ip with square brackets, e.g.: ssl:[::1]:6640.
                     The --private-key, --certificate, and --ca-cert options are  mandatory  when
                     this form is used.

              tcp:ip:port
                     Connect  to  the given TCP port on ip, where ip can be IPv4 or IPv6 address.
                     If ip is  an  IPv6  address,  then  wrap  ip  with  square  brackets,  e.g.:
                     tcp:[::1]:6640.

              unix:file
                     On POSIX, connect to the Unix domain server socket named file.

                     On Windows, connect to a localhost TCP port whose value is written in file.

              pssl:port[:ip]
                     Listen  on the given SSL port for a connection.  By default, connections are
                     not bound to a particular local IP address and it listens only on IPv4  (but
                     not  IPv6) addresses, but specifying ip limits connections to those from the
                     given ip, either IPv4 or IPv6 address.  If ip is an IPv6 address, then  wrap
                     ip   with   square  brackets,  e.g.:  pssl:6640:[::1].   The  --private-key,
                     --certificate, and --ca-cert options are mandatory when this form is used.

              ptcp:port[:ip]
                     Listen on the given TCP port for a connection.  By default, connections  are
                     not  bound to a particular local IP address and it listens only on IPv4 (but
                     not IPv6) addresses, but ip may be specified to listen only for  connections
                     to  the  given  ip,  either IPv4 or IPv6 address.  If ip is an IPv6 address,
                     then wrap ip with square brackets, e.g.: ptcp:6640:[::1].

              punix:file
                     On POSIX, listen  on  the  Unix  domain  server  socket  named  file  for  a
                     connection.

                     On  Windows, listen on a kernel chosen TCP port on the localhost. The kernel
                     chosen TCP port value is written in file.

   SSL Configuration
       When ovs-vswitchd  is  configured  to  connect  over  SSL  for  management  or  controller
       connectivity, the following parameters are required:

       private-key
              Specifies  a  PEM  file  containing  the  private  key used as the virtual switch's
              identity for SSL connections to the controller.

       certificate
              Specifies a PEM file containing a certificate, signed by the certificate  authority
              (CA)  used  by  the  controller  and  manager,  that certifies the virtual switch's
              private key, identifying a trustworthy switch.

       ca-cert
              Specifies a PEM file containing the CA certificate used to verify that the  virtual
              switch is connected to a trustworthy controller.

       These  files  are read only once, at ovs-vswitchd startup time.  If their contents change,
       ovs-vswitchd must be killed and restarted.

       These SSL settings apply to all SSL connections made by the virtual switch.

       get-ssl
              Prints the SSL configuration.

       del-ssl
              Deletes the current SSL configuration.

       [--bootstrap] set-ssl private-key certificate ca-cert
              Sets the SSL configuration.  The --bootstrap option is described below.

     CA Certificate Bootstrap

       Ordinarily, all of the files named in the SSL configuration must exist  when  ovs-vswitchd
       starts.   However, if the ca-cert file does not exist and the --bootstrap option is given,
       then ovs-vswitchd will attempt to obtain the CA certificate from  the  controller  on  its
       first  SSL  connection  and  save  it to the named PEM file.  If it is successful, it will
       immediately drop the connection and reconnect, and from then on all SSL  connections  must
       be authenticated by a certificate signed by the CA certificate thus obtained.

       This option exposes the SSL connection to a man-in-the-middle attack obtaining the initial
       CA certificate, but it may be useful for bootstrapping.

       This option is only useful if the controller sends its CA certificate as part of  the  SSL
       certificate  chain.   The  SSL  protocol  does  not  require the controller to send the CA
       certificate.

   Auto-Attach Commands
       The IETF Auto-Attach SPBM draft standard describes a compact method of using IEEE  802.1AB
       Link  Layer  Discovery Protocol (LLDP) together with a IEEE 802.1aq Shortest Path Bridging
       (SPB) network to automatically attach network devices to  individual  services  in  a  SPB
       network.   The  intent  here  is to allow network applications and devices using OVS to be
       able to easily take advantage of features offered by industry  standard  SPB  networks.  A
       fundamental  element  of  the  Auto-Attach  feature  is  to map traditional VLANs onto SPB
       I_SIDs. These commands manage the Auto-Attach I-SID/VLAN mappings.

       add-aa-mapping bridge i-sid vlan
              Creates a new Auto-Attach mapping on bridge for i-sid and vlan.

       del-aa-mapping bridge i-sid vlan
              Deletes an Auto-Attach mapping on bridge for i-sid and vlan.

       get-aa-mapping bridge
              Lists all of the Auto-Attach mappings within bridge on standard output.

   Database Commands
       These commands query and  modify  the  contents  of  ovsdb  tables.   They  are  a  slight
       abstraction  of  the  ovsdb interface and as such they operate at a lower level than other
       ovs-vsctl commands.

     Identifying Tables, Records, and Columns

       Each of these commands has a table parameter to identify  a  table  within  the  database.
       Many  of  them  also  take a record parameter that identifies a particular record within a
       table.  The record parameter may  be  the  UUID  for  a  record,  and  many  tables  offer
       additional  ways  to  identify  records.   Some  commands also take column parameters that
       identify a particular field within the records in a table.

       The following tables are currently defined:

       Open_vSwitch
              Global configuration for an ovs-vswitchd.  This table contains exactly one  record,
              identified by specifying . as the record name.

       Bridge Configuration  for  a  bridge within an Open vSwitch.  Records may be identified by
              bridge name.

       Port   A bridge port.  Records may be identified by port name.

       Interface
              A network device attached to a port.  Records may be identified by name.

       Flow_Table
              Configuration for a particular OpenFlow flow table.  Records may be  identified  by
              name.

       QoS    Quality-of-service  configuration  for  a  Port.  Records may be identified by port
              name.

       Queue  Configuration for one queue within  a  QoS  configuration.   Records  may  only  be
              identified by UUID.

       Mirror A  port mirroring configuration attached to a bridge.  Records may be identified by
              mirror name.

       Controller
              Configuration for an OpenFlow controller.  A controller attached  to  a  particular
              bridge may be identified by the bridge's name.

       Manager
              Configuration  for  an OVSDB connection.  Records may be identified by target (e.g.
              tcp:1.2.3.4).

       NetFlow
              A NetFlow configuration attached to a bridge.  Records may be identified by  bridge
              name.

       SSL    The  global  SSL  configuration  for  ovs-vswitchd.   The  record  attached  to the
              Open_vSwitch table may be identified by specifying . as the record name.

       sFlow  An sFlow exporter configuration attached to a bridge.  Records may be identified by
              bridge name.

       IPFIX  An IPFIX exporter configuration attached to a bridge.  Records may be identified by
              bridge name.

       Flow_Sample_Collector_Set
              An IPFIX exporter configuration attached to a bridge for sampling packets on a per-
              flow basis using OpenFlow sample actions.

       AutoAttach
              Configuration for Auto Attach within a bridge.

       Record  names  must be specified in full and with correct capitalization.  Names of tables
       and columns are not case-sensitive, and -- and  _  are  treated  interchangeably.   Unique
       abbreviations are acceptable, e.g. net or n is sufficient to identify the NetFlow table.

     Database Values

       Each  column  in  the  database accepts a fixed type of data.  The currently defined basic
       types, and their representations, are:

       integer
              A decimal integer in the range -2**63 to 2**63-1, inclusive.

       real   A floating-point number.

       Boolean
              True or false, written true or false, respectively.

       string An arbitrary Unicode string, except that null bytes are not  allowed.   Quotes  are
              optional  for  most  strings  that  begin  with an English letter or underscore and
              consist only of letters, underscores, hyphens,  and  periods.   However,  true  and
              false  and  strings  that match the syntax of UUIDs (see below) must be enclosed in
              double quotes to distinguish them from other basic types.  When double  quotes  are
              used, the syntax is that of strings in JSON, e.g. backslashes may be used to escape
              special characters.  The empty string must be  represented  as  a  pair  of  double
              quotes ("").

       UUID   Either   a   universally   unique  identifier  in  the  style  of  RFC  4122,  e.g.
              f81d4fae-7dec-11d0-a765-00a0c91e6bf6, or an  @name  defined  by  a  get  or  create
              command within the same ovs-vsctl invocation.

       Multiple  values  in  a  single column may be separated by spaces or a single comma.  When
       multiple values are present, duplicates are not  allowed,  and  order  is  not  important.
       Conversely,  some database columns can have an empty set of values, represented as [], and
       square brackets may optionally enclose other non-empty sets or single values as well.

       A few database columns are ``maps'' of key-value pairs, where the key and  the  value  are
       each  some  fixed database type.  These are specified in the form key=value, where key and
       value follow the syntax for the column's key type  and  value  type,  respectively.   When
       multiple  pairs  are  present  (separated  by  spaces  or a comma), duplicate keys are not
       allowed, and again the order is not important.  Duplicate values are  allowed.   An  empty
       map is represented as {}.  Curly braces may optionally enclose non-empty maps as well (but
       use quotes  to  prevent  the  shell  from  expanding  other-config={0=x,1=y}  into  other-
       config=0=x other-config=1=y, which may not have the desired effect).

     Database Command Syntax

       [--if-exists] [--columns=column[,column]...] list table [record]...
              Lists  the  data  in each specified record.  If no records are specified, lists all
              the records in table.

              If --columns is specified, only the requested columns are listed, in the  specified
              order.  Otherwise, all columns are listed, in alphabetical order by column name.

              Without  --if-exists,  it is an error if any specified record does not exist.  With
              --if-exists, the command ignores any record that does not exist, without  producing
              any output.

       [--columns=column[,column]...] find table [column[:key]=value]...
              Lists  the  data  in  each  record in table whose column equals value or, if key is
              specified, whose column contains a key with the  specified  value.   The  following
              operators may be used where = is written in the syntax summary:

              = != < > <= >=
                     Selects  records in which column[:key] equals, does not equal, is less than,
                     is greater than, is less than or equal to, or is greater than  or  equal  to
                     value, respectively.

                     Consider  column[:key]  and  value  as sets of elements.  Identical sets are
                     considered  equal.   Otherwise,  if  the  sets  have  different  numbers  of
                     elements,  then  the  set  with  more  elements  is considered to be larger.
                     Otherwise, consider a element from each set pairwise,  in  increasing  order
                     within each set.  The first pair that differs determines the result.  (For a
                     column that contains key-value pairs, first all the keys are  compared,  and
                     values are considered only if the two sets contain identical keys.)

              {=} {!=}
                     Test for set equality or inequality, respectively.

              {<=}   Selects  records  in  which column[:key] is a subset of value.  For example,
                     flood-vlans{<=}1,2 selects records in which the flood-vlans  column  is  the
                     empty set or contains 1 or 2 or both.

              {<}    Selects  records  in  which  column[:key]  is a proper subset of value.  For
                     example, flood-vlans{<}1,2 selects records in which the  flood-vlans  column
                     is the empty set or contains 1 or 2 but not both.

              {>=} {>}
                     Same  as  {<=}  and  {<},  respectively,  except  that  the  relationship is
                     reversed.  For example, flood-vlans{>=}1,2  selects  records  in  which  the
                     flood-vlans column contains both 1 and 2.

              For  arithmetic  operators (= != < > <= >=), when key is specified but a particular
              record's column does not contain  key,  the  record  is  always  omitted  from  the
              results.   Thus,  the  condition other-config:mtu!=1500 matches records that have a
              mtu key whose value is not 1500, but not those that lack an mtu key.

              For the set operators, when key is specified but a particular record's column  does
              not  contain key, the comparison is done against an empty set.  Thus, the condition
              other-config:mtu{!=}1500 matches records that have a mtu key  whose  value  is  not
              1500 and those that lack an mtu key.

              Don't forget to escape < or > from interpretation by the shell.

              If  --columns is specified, only the requested columns are listed, in the specified
              order.  Otherwise all columns are listed, in alphabetical order by column name.

              The UUIDs shown for rows created in the same ovs-vsctl invocation will be wrong.

       [--if-exists] [--id=@name] get table record [column[:key]]...
              Prints the value of each specified column in the given record in  table.   For  map
              columns, a key may optionally be specified, in which case the value associated with
              key in the column is printed, instead of the entire map.

              Without --if-exists, it is an error if record does not exist or key  is  specified,
              if  key  does  not  exist  in record.  With --if-exists, a missing record yields no
              output and a missing key prints a blank line.

              If @name is specified, then the UUID for record may be referred  to  by  that  name
              later in the same ovs-vsctl invocation in contexts where a UUID is expected.

              Both  --id  and  the column arguments are optional, but usually at least one or the
              other should be specified.  If both are omitted, then get has no effect  except  to
              verify that record exists in table.

              --id and --if-exists cannot be used together.

       [--if-exists] set table record column[:key]=value...
              Sets the value of each specified column in the given record in table to value.  For
              map columns, a key may optionally be specified, in which case the value  associated
              with  key  in  that  column  is  changed (or added, if none exists), instead of the
              entire map.

              Without --if-exists, it is an error if record does not  exist.   With  --if-exists,
              this command does nothing if record does not exist.

       [--if-exists] add table record column [key=]value...
              Adds the specified value or key-value pair to column in record in table.  If column
              is a map, then key is required, otherwise it is prohibited.  If key already  exists
              in  a  map  column,  then the current value is not replaced (use the set command to
              replace an existing value).

              Without --if-exists, it is an error if record does not  exist.   With  --if-exists,
              this command does nothing if record does not exist.

       [--if-exists] remove table record column value...
       [--if-exists] remove table record column key...
       [--if-exists] remove table record column key=value...
              Removes  the  specified  values  or key-value pairs from column in record in table.
              The first form applies to columns that  are  not  maps:  each  specified  value  is
              removed  from the column.  The second and third forms apply to map columns: if only
              a key is specified, then  any  key-value  pair  with  the  given  key  is  removed,
              regardless  of  its  value; if a value is given then a pair is removed only if both
              key and value match.

              It is not an error if the column does not contain the specified  key  or  value  or
              pair.

              Without  --if-exists,  it  is an error if record does not exist.  With --if-exists,
              this command does nothing if record does not exist.

       [--if-exists] clear table record column...
              Sets each column in record in table to the empty set or empty map, as  appropriate.
              This command applies only to columns that are allowed to be empty.

              Without  --if-exists,  it  is an error if record does not exist.  With --if-exists,
              this command does nothing if record does not exist.

       [--id=@name] create table column[:key]=value...
              Creates a new record in table and sets the initial values of each column.   Columns
              not  explicitly set will receive their default values.  Outputs the UUID of the new
              row.

              If @name is specified, then the UUID for the new row may be  referred  to  by  that
              name  elsewhere  in  the  same  ovs-vsctl  invocation  in  contexts where a UUID is
              expected.  Such references may precede or follow the create command.

              Caution (ovs-vsctl as exmaple)
                     Records in the Open vSwitch database are significant only when they  can  be
                     reached  directly  or  indirectly  from  the Open_vSwitch table.  Except for
                     records in the QoS or Queue tables, records that are not reachable from  the
                     Open_vSwitch  table  are  automatically  deleted  from  the  database.  This
                     deletion happens  immediately,  without  waiting  for  additional  ovs-vsctl
                     commands  or other database activity.  Thus, a create command must generally
                     be accompanied by additional commands within the same  ovs-vsctl  invocation
                     to  add a chain of references to the newly created record from the top-level
                     Open_vSwitch record.  The EXAMPLES section gives some examples that show how
                     to do this.

       [--if-exists] destroy table record...
              Deletes  each  specified  record from table.  Unless --if-exists is specified, each
              records must exist.

       --all destroy table
              Deletes all records from the table.

              Caution (ovs-vsctl as exmaple)
                     The destroy command is only useful for records in the QoS or  Queue  tables.
                     Records  in  other  tables  are automatically deleted from the database when
                     they become unreachable  from  the  Open_vSwitch  table.   This  means  that
                     deleting  the  last  reference  to  a  record is sufficient for deleting the
                     record itself.  For records in these tables, destroy  is  silently  ignored.
                     See the EXAMPLES section below for more information.

       wait-until table record [column[:key]=value]...
              Waits  until  table contains a record named record whose column equals value or, if
              key is specified, whose column contains a key with the specified value.  Any of the
              operators !=, <, >, <=, or >= may be substituted for = to test for inequality, less
              than, greater  than,  less  than  or  equal  to,  or  greater  than  or  equal  to,
              respectively.  (Don't forget to escape < or > from interpretation by the shell.)

              If  no column[:key]=value arguments are given, this command waits only until record
              exists.  If more than one such argument is given, the command waits  until  all  of
              them are satisfied.

              Caution (ovs-vsctl as exmaple)
                     Usually  wait-until  should be placed at the beginning of a set of ovs-vsctl
                     commands.  For example, wait-until bridge br0 -- get bridge br0  datapath_id
                     waits  until  a  bridge  named  br0  is created, then prints its datapath_id
                     column, whereas get bridge br0 datapath_id --  wait-until  bridge  br0  will
                     abort if no bridge named br0 exists when ovs-vsctl initially connects to the
                     database.

              Consider specifying --timeout=0 along with --wait-until, to prevent ovs-vsctl  from
              terminating after waiting only at most 5 seconds.

       comment [arg]...
              This  command has no effect on behavior, but any database log record created by the
              command will include the command and its arguments.

EXAMPLES

       Create a new bridge named br0 and add port eth0 to it:

              ovs-vsctl add-br br0
              ovs-vsctl add-port br0 eth0

       Alternatively, perform both operations in a single atomic transaction:

              ovs-vsctl add-br br0 -- add-port br0 eth0

       Delete bridge br0, reporting an error if it does not exist:

              ovs-vsctl del-br br0

       Delete bridge br0 if it exists:

              ovs-vsctl --if-exists del-br br0

       Set the qos column of the Port record for eth0 to point to a new QoS record, which in turn
       points with its queue 0 to a new Queue record:

              ovs-vsctl  --  set  port eth0 qos=@newqos -- --id=@newqos create qos type=linux-htb
              other-config:max-rate=1000000 queues:0=@newqueue  --  --id=@newqueue  create  queue
              other-config:min-rate=1000000 other-config:max-rate=1000000

CONFIGURATION COOKBOOK

   Port Configuration
       Add  an  ``internal  port''  vlan10  to  bridge br0 as a VLAN access port for VLAN 10, and
       configure it with an IP address:

              ovs-vsctl add-port br0 vlan10 tag=10 -- set Interface vlan10 type=internal

              ifconfig vlan10 192.168.0.123

       Add a GRE tunnel port gre0 to remote IP address 1.2.3.4 to bridge br0:

              ovs-vsctl    add-port    br0    gre0    --    set    Interface    gre0     type=gre
              options:remote_ip=1.2.3.4

   Port Mirroring
       Mirror  all packets received or sent on eth0 or eth1 onto eth2, assuming that all of those
       ports exist on bridge br0 (as a side-effect this causes any packets received on eth2 to be
       ignored):

              ovs-vsctl -- set Bridge br0 mirrors=@m \

              -- --id=@eth0 get Port eth0 \

              -- --id=@eth1 get Port eth1 \

              -- --id=@eth2 get Port eth2 \

              --  --id=@m  create  Mirror  name=mymirror  select-dst-port=@eth0,@eth1 select-src-
              port=@eth0,@eth1 output-port=@eth2

       Remove the mirror created above from br0, which also destroys the Mirror record (since  it
       is now unreferenced):

              ovs-vsctl -- --id=@rec get Mirror mymirror \

              -- remove Bridge br0 mirrors @rec

       The following simpler command also works:

              ovs-vsctl clear Bridge br0 mirrors

   Quality of Service (QoS)
       Create a linux-htb QoS record that points to a few queues and use it on eth0 and eth1:

              ovs-vsctl -- set Port eth0 qos=@newqos \

              -- set Port eth1 qos=@newqos \

              --   --id=@newqos   create   QoS   type=linux-htb  other-config:max-rate=1000000000
              queues=0=@q0,1=@q1 \

              --       --id=@q0        create        Queue        other-config:min-rate=100000000
              other-config:max-rate=100000000 \

              -- --id=@q1 create Queue other-config:min-rate=500000000

       Deconfigure the QoS record above from eth1 only:

              ovs-vsctl clear Port eth1 qos

       To  deconfigure  the  QoS  record  from  both eth0 and eth1 and then delete the QoS record
       (which must be done explicitly because unreferenced  QoS  records  are  not  automatically
       destroyed):

              ovs-vsctl -- destroy QoS eth0 -- clear Port eth0 qos -- clear Port eth1 qos

       (This  command will leave two unreferenced Queue records in the database.  To delete them,
       use "ovs-vsctl list Queue" to find their UUIDs, then "ovs-vsctl destroy Queue uuid1 uuid2"
       to destroy each of them or use "ovs-vsctl -- --all destroy Queue" to delete all records.)

   Connectivity Monitoring
       Monitor connectivity to a remote maintenance point on eth0.

              ovs-vsctl set Interface eth0 cfm_mpid=1

       Deconfigure connectivity monitoring from above:

              ovs-vsctl clear Interface eth0 cfm_mpid

   NetFlow
       Configure  bridge  br0 to send NetFlow records to UDP port 5566 on host 192.168.0.34, with
       an active timeout of 30 seconds:

              ovs-vsctl -- set Bridge br0 netflow=@nf \

              -- --id=@nf create NetFlow targets=\"192.168.0.34:5566\" active-timeout=30

       Update the NetFlow configuration created by the previous command to instead use an  active
       timeout of 60 seconds:

              ovs-vsctl set NetFlow br0 active_timeout=60

       Deconfigure  the  NetFlow settings from br0, which also destroys the NetFlow record (since
       it is now unreferenced):

              ovs-vsctl clear Bridge br0 netflow

   sFlow
       Configure bridge br0 to send sFlow records to a collector on 10.0.0.1 at port 6343,  using
       eth1´s IP address as the source, with specific sampling parameters:

              ovs-vsctl  --  --id=@s  create sFlow agent=eth1 target=\"10.0.0.1:6343\" header=128
              sampling=64 polling=10 \

              -- set Bridge br0 sflow=@s

       Deconfigure sFlow from br0, which  also  destroys  the  sFlow  record  (since  it  is  now
       unreferenced):

              ovs-vsctl -- clear Bridge br0 sflow

   IPFIX
       Configure  bridge  br0 to send one IPFIX flow record per packet sample to UDP port 4739 on
       host 192.168.0.34, with Observation Domain ID 123 and Observation Point  ID  456,  a  flow
       cache  active  timeout  of 1 minute (60 seconds), maximum flow cache size of 13 flows, and
       flows sampled on output port with tunnel info(sampling on input and output port is enabled
       by default if not disabled) :

              ovs-vsctl -- set Bridge br0 ipfix=@i \

              --    --id=@i    create   IPFIX   targets=\"192.168.0.34:4739\"   obs_domain_id=123
              obs_point_id=456 cache_active_timeout=60 cache_max_flows=13 \

              other_config:enable-input-sampling=false other_config:enable-tunnel-sampling=true

       Deconfigure the IPFIX settings from br0, which also destroys the IPFIX record (since it is
       now unreferenced):

              ovs-vsctl clear Bridge br0 ipfix

   802.1D Spanning Tree Protocol (STP)
       Configure bridge br0 to participate in an 802.1D spanning tree:

              ovs-vsctl set Bridge br0 stp_enable=true

       Set the bridge priority of br0 to 0x7800:

              ovs-vsctl set Bridge br0 other_config:stp-priority=0x7800

       Set the path cost of port eth0 to 10:

              ovs-vsctl set Port eth0 other_config:stp-path-cost=10

       Deconfigure STP from above:

              ovs-vsctl set Bridge br0 stp_enable=false

   Multicast Snooping
       Configure bridge br0 to enable multicast snooping:

              ovs-vsctl set Bridge br0 mcast_snooping_enable=true

       Set the multicast snooping aging time br0 to 300 seconds:

              ovs-vsctl set Bridge br0 other_config:mcast-snooping-aging-time=300

       Set the multicast snooping table size br0 to 2048 entries:

              ovs-vsctl set Bridge br0 other_config:mcast-snooping-table-size=2048

       Disable  flooding  of  unregistered  multicast packets to all ports. When set to true, the
       switch will send unregistered multicast packets  only  to  ports  connected  to  multicast
       routers.  When  it  is  set to false, the switch will send them to all ports. This command
       disables the flood of unregistered packets on bridge br0.

              ovs-vsctl     set     Bridge     br0     other_config:mcast-snooping-disable-flood-
              unregistered=true

       Enable flooding of multicast packets (except Reports) on a specific port.

              ovs-vsctl set Port eth1 other_config:mcast-snooping-flood=true

       Enable flooding of Reports on a specific port.

              ovs-vsctl set Port eth1 other_config:mcast-snooping-flood-reports=true

       Deconfigure multicasting snooping from above:

              ovs-vsctl set Bridge br0 mcast_snooping_enable=false

   802.1D-2004 Rapid Spanning Tree Protocol (RSTP)
       Configure bridge br0 to participate in an 802.1D-2004 Rapid Spanning Tree:

              ovs-vsctl set Bridge br0 rstp_enable=true

       Set the bridge address of br0 to 00:aa:aa:aa:aa:aa :

              ovs-vsctl set Bridge br0 other_config:rstp-address=00:aa:aa:aa:aa:aa

       Set  the bridge priority of br0 to 0x7000. The value must be specified in decimal notation
       and should be a multiple of 4096 (if not, it is rounded down to the  nearest  multiple  of
       4096). The default priority value is 0x800 (32768).

              ovs-vsctl set Bridge br0 other_config:rstp-priority=28672

       Set  the bridge ageing time of br0 to 1000 s. The ageing time value should be between 10 s
       and 1000000 s. The default value is 300 s.

              ovs-vsctl set Bridge br0 other_config:rstp-ageing-time=1000

       Set the bridge force protocol version of br0 to 0. The  force  protocol  version  has  two
       acceptable values: 0 (STP compatibility mode) and 2 (normal operation).

              ovs-vsctl set Bridge br0 other_config:rstp-force-protocol-version=0

       Set  the  bridge max age of br0 to 10 s. The max age value should be between 6 s and 40 s.
       The default value is 20 s.

              ovs-vsctl set Bridge br0 other_config:rstp-max-age=10

       Set the bridge forward delay of br0 to 15 s.  This value should be between 4 s and  30  s.
       The default value is 15 s.

              ovs-vsctl set Bridge br0 other_config:rstp-forward-delay=15

       Set  the bridge transmit hold count of br0 to 7 s. This value should be between 1 s and 10
       s. The default value is 6 s.

              ovs-vsctl set Bridge br0 other_config:rstp-transmit-hold-count=7

       Enable RSTP on the Port eth0:

              ovs-vsctl set Port eth0 other_config:rstp-enable=true

       Disable RSTP on the Port eth0:

              ovs-vsctl set Port eth0 other_config:rstp-enable=false

       Set the priority of port eth0 to 32. The value must be specified in decimal  notation  and
       should be a multiple of 16 (if not, it is rounded down to the nearest multiple of 16). The
       default priority value is 0x80 (128).

              ovs-vsctl set Port eth0 other_config:rstp-port-priority=32

       Set the port number of port eth0 to 3:

              ovs-vsctl set Port eth0 other_config:rstp-port-num=3

       Set the path cost of port eth0 to 150:

              ovs-vsctl set Port eth0 other_config:rstp-path-cost=150

       Set the admin edge value of port eth0:

              ovs-vsctl set Port eth0 other_config:rstp-port-admin-edge=true

       Set the auto edge value of port eth0:

              ovs-vsctl set Port eth0 other_config:rstp-port-auto-edge=true

       Set the admin point to point MAC value of port eth0.  Acceptable values are 0 (not  point-
       to-point),  1  (point-to-point,  the default value) or 2 (automatic detection).  The auto-
       detection mode is not currently implemented, and the value 2 has the same effect of 0 (not
       point-to-point).

              ovs-vsctl set Port eth0 other_config:rstp-admin-p2p-mac=1

       Set the admin port state value of port eth0.  true is the default value.

              ovs-vsctl set Port eth0 other_config:rstp-admin-port-state=false

       Set the mcheck value of port eth0:

              ovs-vsctl set Port eth0 other_config:rstp-port-mcheck=true

       Deconfigure RSTP from above:

              ovs-vsctl set Bridge br0 rstp_enable=false

   OpenFlow Version
       Configure bridge br0 to support OpenFlow versions 1.0, 1.2, and 1.3:

              ovs-vsctl set bridge br0 protocols=OpenFlow10,OpenFlow12,OpenFlow13

   Flow Table Configuration
       Limit flow table 0 on bridge br0 to a maximum of 100 flows:

              ovs-vsctl  --  --id=@ft  create Flow_Table flow_limit=100 overflow_policy=refuse --
              set Bridge br0 flow_tables=0=@ft

EXIT STATUS

       0      Successful program execution.

       1      Usage, syntax, or configuration file error.

       2      The bridge argument to br-exists specified the name  of  a  bridge  that  does  not
              exist.

SEE ALSO

       ovsdb-server(1), ovs-vswitchd(8), ovs-vswitchd.conf.db(5).