Provided by: openvswitch-switch_2.11.0-0ubuntu2_amd64 bug

NAME

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

SYNOPSIS

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

DESCRIPTION

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

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

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

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

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

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

OPTIONS

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

       --db=server
              Sets  server  as  the  database  server  that ovs-vsctl contacts to query or modify
              configuration.  server may be an OVSDB active  or  passive  connection  method,  as
              described in ovsdb(7).  The default 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  approximately  secs  seconds.   If  the
              timeout  expires,  ovs-vsctl  will  exit  with  a SIGALRM signal.  (A timeout would
              normally happen only if the database cannot be  contacted,  or  if  the  system  is
              overloaded.)

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

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

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

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

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

              table  2-D text tables with aligned columns.

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

              html   HTML tables.

              csv    Comma-separated values as defined in RFC 4180.

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

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

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

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

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

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

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

              json   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 readable fashion.  Members of objects and
              elements of arrays are printed one per line, with indentation.

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

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

       --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 certificates cannot be verified to be those of
              known trusted hosts.

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

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

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

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

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

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

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

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

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

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

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

              Case is not significant within spec.

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

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

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

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

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

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

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

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

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

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

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

              ·      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 below.

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

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

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

       show   Prints a brief overview of the database contents.

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

   Bridge Commands
       These commands examine and manipulate Open vSwitch bridges.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

   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 created by the  command.
              The syntax is the same as that for the set command (see Database Commands below).

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

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

       [--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 removed 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 interface, 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 OpenFlow controllers.  The  switch  is
       typically  configured to connect to a primary controller that takes charge of the bridge's
       flow table to implement a network policy.  In addition, the switch can  be  configured  to
       listen  to  connections  from service controllers.  Service controllers are typically used
       for occasional support and maintenance, e.g. with ovs-ofctl.

       get-controller bridge
              Prints the configured controller target.

       del-controller bridge
              Deletes the configured controller target.

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

              ssl:host[:port]
              tcp:host[:port]
                     The specified port on the given host, which can be expressed either as a DNS
                     name (if built with unbound library) 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  represented  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  addresses,  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  inactivity probe interval.  In this mode, ovs-vswitchd
       causes the datapath to act  like  an  ordinary  MAC-learning  switch.   ovs-vswitchd  will
       continue  to retry connecting to the controller in the background and, when the connection
       succeeds, it discontinues its standalone behavior.

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

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

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

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

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

       get-manager
              Prints the configured manager(s).

       del-manager
              Deletes the configured manager(s).

       set-manager target...
              Sets the configured manager target or targets.  Each target may 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  virtual  switch's
              identity for SSL connections to the controller.

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

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

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

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

       get-ssl
              Prints the SSL configuration.

       del-ssl
              Deletes the current SSL configuration.

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

     CA Certificate Bootstrap

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

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

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

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

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

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

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

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

     Identifying Tables, Records, and Columns

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

       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
       interchangeably.   Unique abbreviations of table and column names are acceptable, e.g. net
       or n is sufficient to identify the NetFlow table.

     Database Values

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

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

       real   A floating-point number.

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

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

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

       Multiple values in a single column may be separated by spaces or  a  single  comma.   When
       multiple  values  are  present,  duplicates  are  not allowed, and order is not important.
       Conversely, some database columns can have an empty set of values, represented as [],  and
       square  brackets may optionally enclose other non-empty sets or single values as well. 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 elements 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 optionally enclose non-empty maps as well (but
       use  quotes  to  prevent  the  shell  from  expanding  other-config={0=x,1=y}  into other-
       config=0=x other-config=1=y, which may not have the desired effect).

     Database Command Syntax

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

              Caution (ovs-vsctl as 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 database activity.  Thus, a create command must  generally
                     be  accompanied  by additional commands within the same ovs-vsctl invocation
                     to add a chain of references to the newly created record from the  top-level
                     Open_vSwitch record.  The EXAMPLES section gives some examples that show how
                     to do this.

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

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

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

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

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

              Caution (ovs-vsctl as 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 prevent ovs-vsctl from
              terminating after waiting only at most 5 seconds.

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

EXAMPLES

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

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

       Alternatively, perform both operations in a single atomic transaction:

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

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

              ovs-vsctl del-br br0

       Delete bridge br0 if it exists:

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

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

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

CONFIGURATION COOKBOOK

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

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

              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
              options:remote_ip=1.2.3.4

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

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

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

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

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

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

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

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

              -- remove Bridge br0 mirrors @rec

       The following simpler command also works:

              ovs-vsctl clear Bridge br0 mirrors

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

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

              -- set Port eth1 qos=@newqos \

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

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

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

       Deconfigure the QoS record above from eth1 only:

              ovs-vsctl clear Port eth1 qos

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

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

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

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

              ovs-vsctl set Interface eth0 cfm_mpid=1

       Deconfigure connectivity monitoring from above:

              ovs-vsctl clear Interface eth0 cfm_mpid

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

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

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

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

              ovs-vsctl set NetFlow br0 active_timeout=60

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

              ovs-vsctl clear Bridge br0 netflow

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

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

              -- set Bridge br0 sflow=@s

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

              ovs-vsctl -- clear Bridge br0 sflow

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

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

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

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

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

              ovs-vsctl clear Bridge br0 ipfix

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

              ovs-vsctl set Bridge br0 stp_enable=true

       Set the bridge priority of br0 to 0x7800:

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

       Set the path cost of port eth0 to 10:

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

       Deconfigure STP from above:

              ovs-vsctl set Bridge br0 stp_enable=false

   Multicast Snooping
       Configure bridge br0 to enable multicast snooping:

              ovs-vsctl set Bridge br0 mcast_snooping_enable=true

       Set the multicast snooping aging time br0 to 300 seconds:

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

       Set the multicast snooping table size br0 to 2048 entries:

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

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

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

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

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

       Enable flooding of Reports on a specific port.

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

       Deconfigure multicasting snooping from above:

              ovs-vsctl set Bridge br0 mcast_snooping_enable=false

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

              ovs-vsctl set Bridge br0 rstp_enable=true

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

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

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

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

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

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

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

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

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

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

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

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

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

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

       Enable RSTP on the Port eth0:

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

       Disable RSTP on the Port eth0:

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

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

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

       Set the port number of port eth0 to 3:

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

       Set the path cost of port eth0 to 150:

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

       Set the admin edge value of port eth0:

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

       Set the auto edge value of port eth0:

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

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

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

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

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

       Set the mcheck value of port eth0:

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

       Deconfigure RSTP from above:

              ovs-vsctl set Bridge br0 rstp_enable=false

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

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

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

              ovs-vsctl -- --id=@ft create Flow_Table  flow_limit=100  overflow_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   overflow_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).