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
       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  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
       assigned the implicit VLAN of the fake bridge of which  they  are  mem‐
       bers.   (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 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[: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 brack‐
                     ets, 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 local named pipe.  A file is cre‐
                     ated in the path file to mimic the  behavior  of  a  Unix
                     domain socket.

       --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 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
                     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  ta‐
                            ble  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 follow‐
              ing types of format 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   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 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.

   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
              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 --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.  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 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
                     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  sock‐
                     ets, 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 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
              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 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.

       [--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.

       [--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,
              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 Open‐
       Flow 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, 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][: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,--certifi
                     cate, 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), this
       allows the administrator to use ovs-vsctl to configure database connec‐
       tions.

       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 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[: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 brack‐
                     ets, 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 local named pipe.  A file is cre‐
                     ated  in  the  path  file to mimic the behavior of a Unix
                     domain socket.

   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
       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  stan‐
       dard  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.

       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  identi‐
              fied 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 specify‐
              ing . 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  sam‐
              pling 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  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
              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 sin‐
       gle  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.
       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
                     increasing  order  within  each set.  The first pair that
                     differs determines the result.  (For a column  that  con‐
                     tains  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 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
              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 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
              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 invoca‐
              tion  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  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 exmaple)
                     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
              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 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

              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  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\"
              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 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
       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-ver
              sion=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 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                        2.7.90                        ovs-vsctl(8)