ovs-vsctl(8)                  Open vSwitch Manual                 ovs-vsctl(8)



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,  imple‐
       mented as a single atomic transaction against the database.

       The  ovs-vsctl command line begins with global options (see OPTIONS be‐
       low for details).  The global options are followed by one or more  com‐
       mands.   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 com‐
       mand-specific options, if any, followed by the command name and any ar‐
       guments.  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  desig‐
       nate  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 as‐
       signed 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.  server may be an OVSDB active or
              passive connection method, as described in  ovsdb(7).   The  de‐
              fault is unix:/var/run/openvswitch/db.sock.

       --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  ap‐
              proximately  secs  seconds.   If  the timeout expires, ovs-vsctl
              will exit with a SIGALRM signal.  (A timeout would normally hap‐
              pen  only  if the database cannot be contacted, or if the system
              is overloaded.)

       --retry
              Without this option, if ovs-vsctl connects outward to the  data‐
              base  server  (the  default)  then ovs-vsctl will try to connect
              once and exit with an error if the connection fails (which  usu‐
              ally 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  com‐
       mands.

       -f format
       --format=format
              Sets  the type of table formatting.  The following types of for
              mat 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 se‐
                     quence 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 el‐
                            ement 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 ex‐
                            pressed in the format described in the OVSDB spec‐
                            ification;  other  cells  are  simply expressed as
                            text strings.

       -d format
       --data=format
              Sets the formatting for cells within output  tables  unless  the
              table  format  is  set to json, in which case json formatting is
              always used when formatting cells.  The following types of  for
              mat are available:

              string (default)
                     The  simple  format described in the Database Values sec‐
                     tion 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   The RFC 4627 JSON format as described above.

       --no-headings
              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  read‐
              able  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.

       --max-column-width=n
              For  table  output  only,  limits the width of any column in the
              output to n columns.  Longer cell data is truncated to  fit,  as
              necessary.  Columns are always wide enough to display the column
              names, if the heading row is printed.

   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 certifi‐
              cates 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 success‐
              ful, it will immediately drop the connection and reconnect,  and
              from then on all SSL connections must be authenticated by a cer‐
              tificate 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 use‐
              ful for bootstrapping.

              This option is only useful if the SSL peer sends its CA certifi‐
              cate  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  cer‐
              tificates  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  com‐
                     mand 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 be‐
              low).

              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 --ver
              bose=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/open
              vswitch/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 dae‐
              mon.  Following forms are supported:

              •      libc, use libc syslog() function.  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 possi‐
                     ble 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 pos‐
                     sible  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 ex‐
                     ample, 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.

              •      null, discards all messages logged to syslog.

              The default is  taken  from  the  OVS_SYSLOG_METHOD  environment
              variable; if it is unset, the default is libc.

       -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 be‐
       low.

   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 ef‐
              fect.

              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 data‐
              base 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 it‐
              self  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 com‐
       mands 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  cre‐
              ated  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.

       [--if-exists] del-port [bridge] port
              Deletes  port.  If bridge is omitted, port is removed from what‐
              ever 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 inter‐
              face  that  does  not  exist is an error.  With --if-exists, at‐
              tempting 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.

   Bond Commands
       These commands work with ports that have more than one interface, which
       Open vSwitch calls ``bonds.''

       [--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 cre‐
              ated 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 cre‐
              ated.  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 speci‐
              fied interfaces.

       [--may-exist] add-bond-iface bond iface
              Adds iface as a new bond interface to the  existing  port  bond.
              If  bond previously had only one port, this transforms it into a
              bond.

              Without --may-exist, attempting to add an iface that is  already
              part  of  bond is an error.  With --may-exist, this command does
              nothing if iface is already part of bond.  (It is still an error
              if iface is an interface of some other port or bond.)

       [--if-exists] del-bond-iface [bond] iface
              Removes  iface  from its port.  If bond is omitted, iface is re‐
              moved from whatever port contains it; if bond is  specified,  it
              must be the port that contains bond.

              If  removing  iface causes its port to have only a single inter‐
              face, then that port transforms from a  bond  into  an  ordinary
              port.   It  is  an  error  if iface is the only interface in its
              port.

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

   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  Open‐
       Flow  controllers.   The switch is typically configured to connect to a
       primary controller that takes charge of the bridge's flow table to  im‐
       plement 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:host[:port]
              tcp:host[:port]
                     The  specified  port  on the given host, which can be ex‐
                     pressed either as a DNS name (if built with  unbound  li‐
                     brary)  or  an IP address in IPv4 or IPv6 address format.
                     Wrap   IPv6   addresses   in   square   brackets,    e.g.
                     tcp:[::1]:6653.   On  Linux,  use  %device to designate a
                     scope    for    IPv6    link-level    addresses,     e.g.
                     tcp:[fe80::1234%eth0]: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, connect to a local named pipe that is  repre‐
                     sented  by  a  file created in the path file to mimic the
                     behavior of a Unix domain socket.

              pssl:[port][:host]
              ptcp:[port][:host]
                     Listens for OpenFlow connections on  port.   The  default
                     port  is  6653.  By default, connections are allowed from
                     any IPv4 address.  Specify host as an IPv4 address  or  a
                     bracketed IPv6 address (e.g. ptcp:6653:[::1]).  On Linux,
                     use %device to designate a scope for IPv6 link-level  ad‐
                     dresses, e.g. ptcp:6653:[fe80::1234%eth0].  DNS names can
                     be used if built with unbound  library.   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 inac‐
       tivity probe interval.  In this mode, ovs-vswitchd causes the  datapath
       to  act  like  an ordinary MAC-learning switch.  ovs-vswitchd will con‐
       tinue 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  the startup scripts provided with Open vSwitch; the
       corresponding     ovsdb-server     command     option     is      --re
       mote=db:Open_vSwitch,Open_vSwitch,manager_options), this allows the ad‐
       ministrator 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
              be an OVSDB active or passive connection method, e.g. pssl:6640,
              as described in ovsdb(7).

   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 vir‐
              tual 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 ver‐
              ify that the virtual switch is connected to a  trustworthy  con‐
              troller.

       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 connec‐
       tion 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  boot‐
       strapping.

       This  option  is only useful if the controller sends its CA certificate
       as part of the SSL certificate chain.  The SSL protocol  does  not  re‐
       quire 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 at‐
       tach network devices to individual services in a SPB network.  The  in‐
       tent  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 identi‐
       fies a particular record within a table.  The record parameter  may  be
       the  UUID  for a record, and many tables offer additional ways to iden‐
       tify records.  Some commands also take column parameters that  identify
       a particular field within the records in a table.

       For  a list of tables and their columns, see ovs-vswitchd.conf.db(5) or
       see the table listing from the --help option.

       Record names must be specified in full and with correct capitalization,
       except  that  UUIDs  may  be abbreviated to their first 4 (or more) hex
       digits, as long as that is unique within the table.   Names  of  tables
       and  columns  are  not  case-sensitive,  and - and _ are treated inter‐
       changeably.  Unique abbreviations of table and column names are accept‐
       able, 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 cur‐
       rently 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  al‐
              lowed.   Quotes are optional for most strings that begin with an
              English letter or underscore and consist only of letters, under‐
              scores,  hyphens,  and  periods.   However,  true  and false and
              strings that match the syntax of UUIDs (see below) must  be  en‐
              closed  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 sin‐
       gle comma.  When multiple values are present, duplicates  are  not  al‐
       lowed,  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.
       For a column accepting a set of integers, database  commands  accept  a
       range.  A  range is represented by two integers separated by -. A range
       is inclusive. A range has a maximum size of 4096 elements. If more ele‐
       ments are needed, they can be specified in seperate ranges.

       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 option‐
       ally 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:

              = != gt;>gt; = >gt;>gt;=
                     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,  respec‐
                     tively.

                     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.   Other‐
                     wise,  consider  a element from each set pairwise, in in‐
                     creasing order within each set.  The first pair that dif‐
                     fers  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 iden‐
                     tical 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  con‐
                     tains 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 con‐
                     tains 1 or 2 but not both.

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

              For arithmetic operators (= != gt;>gt; = >gt;>gt;=), 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-con
              fig: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 gt;>gt; 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 invoca‐
              tion 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 con‐
              texts 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 omit‐
              ted, 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 speci‐
              fied, 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  re‐
              place 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 sec‐
              ond and third forms apply to map columns: if only a key is spec‐
              ified,  then  any  key-value pair with the given key is removed,
              regardless of its value; if a value is given then a pair is  re‐
              moved 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 de‐
              fault values.  Outputs the UUID of the new row.

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

              Caution (ovs-vsctl as example)
                     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 data‐
                     base 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 example)
                     The destroy command is only useful for records in the QoS
                     or  Queue  tables.  Records in other tables are automati‐
                     cally deleted from the database when they become unreach‐
                     able from the Open_vSwitch table.  This means that delet‐
                     ing 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 !=, gt;>gt;,
              =, or >gt;>gt;= 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 gt;>gt; from in‐
              terpretation 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 example)
                     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 pre‐
              vent 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-con
              fig: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

              ip addr add 192.168.0.123/24 dev vlan10

       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 op
              tions: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 Mir‐
       ror 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-con
              fig: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  data‐
       base.   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\"  ac
              tive-timeout=30

       Update the NetFlow configuration created by the previous command to in‐
       stead 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 Net‐
       Flow 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 sam‐
       pling parameters:

              ovs-vsctl    --    --id=@s    create   sFlow   agent=eth1   tar
              get=\"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 en‐
       abled by default if not disabled) :

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

              -- --id=@i create  IPFIX  targets=\"192.168.0.34:4739\"  obs_do
              main_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-re
              ports=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-ad
              dress=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-ver
              sion=0

       Set the bridge max age of br0 to 10 s. The max age value should be  be‐
       tween 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 be‐
       tween 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 imple‐
       mented, 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,Open
              Flow13

   Flow Table Configuration
       Make flow table 0 on bridge br0 refuse to accept more than 100 flows:

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

       Make flow table 0 on bridge br0 evict flows, with fairness based on the
       matched ingress port, when there are more than 100:

              ovs-vsctl  --  --id=@ft  create  Flow_Table flow_limit=100 over
              flow_policy=evict groups='"NXM_OF_IN_PORT[]"' -- 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).



Open vSwitch                        2.10.90                       ovs-vsctl(8)