ovn: Add a case of policy based routing.

[mirror_ovs.git] / ovn / utilities / ovn-nbctl.8.xml

<?xml version="1.0" encoding="utf-8"?>
<manpage program="ovn-nbctl" section="8" title="ovn-nbctl">
    <h1>Name</h1>
    <p>ovn-nbctl -- Open Virtual Network northbound db management utility</p>

    <h1>Synopsis</h1>
    <p><code>ovn-nbctl</code> [<var>options</var>] <var>command</var> [<var>arg</var>...]</p>

    <h1>Description</h1>
    <p>This utility can be used to manage the OVN northbound database.</p>

    <h1>General Commands</h1>

    <dl>
      <dt><code>init</code></dt>
      <dd>
        Initializes the database, if it is empty.  If the database has already
        been initialized, this command has no effect.
      </dd>

      <dt><code>show [<var>switch</var> | <var>router</var>]</code></dt>
      <dd>
        Prints a brief overview of the database contents.  If
        <var>switch</var> is provided, only records related to that
        logical switch are shown. If
        <var>router</var> is provided, only records related to that
        logical router are shown.
      </dd>
    </dl>

    <h1>Logical Switch Commands</h1>

    <dl>
      <dt><code>ls-add</code></dt>
      <dd>
        <p>
          Creates a new, unnamed logical switch, which initially has no ports.
          The switch does not have a name, other commands must refer to this
          switch by its UUID.
        </p>
      </dd>

      <dt>[<code>--may-exist</code> | <code>--add-duplicate</code>] <code>ls-add</code> <var>switch</var></dt>
      <dd>
        <p>
          Creates a new logical switch named <var>switch</var>, which
          initially has no ports.
        </p>

        <p>
          The OVN northbound database schema does not require logical switch
          names to be unique, but the whole point to the names is to provide an
          easy way for humans to refer to the switches, making duplicate names
          unhelpful.  Thus, without any options, this command regards it as an
          error if <var>switch</var> is a duplicate name.  With
          <code>--may-exist</code>, adding a duplicate name succeeds but does
          not create a new logical switch.  With <code>--add-duplicate</code>,
          the command really creates a new logical switch with a duplicate
          name.  It is an error to specify both options.  If there are multiple
          logical switches with a duplicate name, configure the logical switches
          using the UUID instead of the <var>switch</var> name.
        </p>
      </dd>

      <dt>[<code>--if-exists</code>] <code>ls-del</code> <var>switch</var></dt>
      <dd>
        Deletes <var>switch</var>.  It is an error if <var>switch</var> does
        not exist, unless <code>--if-exists</code> is specified.
      </dd>

      <dt><code>ls-list</code></dt>
      <dd>
        Lists all existing switches on standard output, one per line.
      </dd>
    </dl>

    <h1>Logical Switch ACL Commands</h1>
    <dl>
      <dt>[<code>--log</code>] <code>acl-add</code> <var>switch</var> <var>direction</var> <var>priority</var> <var>match</var> <var>action</var></dt>
      <dd>
        Adds the specified ACL to <var>switch</var>.
        <var>direction</var> must be either <code>from-lport</code> or
        <code>to-lport</code>.  <var>priority</var> must be between
        <code>1</code> and <code>65534</code>, inclusive.  If
        <code>--log</code> is specified, packet logging is enabled for the
        ACL.  A full description of the fields are in <code>ovn-nb</code>(5).
      </dd>

      <dt><code>acl-del</code> <var>switch</var> [<var>direction</var> [<var>priority</var> <var>match</var>]]</dt>
      <dd>
        Deletes ACLs from <var>switch</var>.  If only
        <var>switch</var> is supplied, all the ACLs from the logical
        switch are deleted.  If <var>direction</var> is also specified,
        then all the flows in that direction will be deleted from the
        logical switch.  If all the fields are given, then a single flow
        that matches all the fields will be deleted.
      </dd>

      <dt><code>acl-list</code> <var>switch</var></dt>
      <dd>
        Lists the ACLs on <var>switch</var>.
      </dd>
    </dl>

    <h1>Logical Switch Port Commands</h1>
    <dl>
      <dt>[<code>--may-exist</code>] <code>lsp-add</code> <var>switch</var> <var>port</var></dt>
      <dd>
        <p>
          Creates on <var>lswitch</var> a new logical switch port named
          <var>port</var>.
        </p>

        <p>
          It is an error if a logical port named <var>port</var> already
          exists, unless <code>--may-exist</code> is specified.  Regardless of
          <code>--may-exist</code>, it is an error if the existing port is in
          some logical switch other than <var>switch</var> or if it has a
          parent port.
        </p>
      </dd>

      <dt>[<code>--may-exist</code>] <code>lsp-add</code> <var>switch</var> <var>port</var> <var>parent</var> <var>tag_request</var></dt>
      <dd>
        <p>
          Creates on <var>switch</var> a logical switch port named
          <var>port</var> that is a child of <var>parent</var> that is
          identified with VLAN ID <var>tag_request</var>.  If
          <var>tag_request</var> is <code>0</code>, <code>ovn-northd</code>
          generates a tag that is unique in the scope of <var>parent</var>.
          This is useful in cases such as virtualized container environments
          where Open vSwitch does not have a direct connection to the
          container's port and it must be shared with the virtual machine's
          port.
        </p>

        <p>
          It is an error if a logical port named <var>port</var> already
          exists, unless <code>--may-exist</code> is specified.  Regardless of
          <code>--may-exist</code>, it is an error if the existing port is not
          in <var>switch</var> or if it does not have the specified
          <var>parent</var> and <var>tag_request</var>.
        </p>
      </dd>

      <dt>[<code>--if-exists</code>] <code>lsp-del</code> <var>port</var></dt>
      <dd>
        Deletes <var>port</var>.  It is an error if <var>port</var> does
        not exist, unless <code>--if-exists</code> is specified.
      </dd>

      <dt><code>lsp-list</code> <var>switch</var></dt>
      <dd>
        Lists all the logical switch ports within <var>switch</var> on
        standard output, one per line.
      </dd>

      <dt><code>lsp-get-parent</code> <var>port</var></dt>
      <dd>
        If set, get the parent port of <var>port</var>.  If not set, print
        nothing.
      </dd>

      <dt><code>lsp-get-tag</code> <var>port</var></dt>
      <dd>
        If set, get the tag for <var>port</var> traffic.  If not set, print
        nothing.
      </dd>

      <dt><code>lsp-set-addresses</code> <var>port</var> [<var>address</var>]...</dt>
      <dd>
        <p>
          Sets the addresses associated with <var>port</var> to
          <var>address</var>.  Each <var>address</var> should be one of the
          following:
        </p>

        <dl>
          <dt>an Ethernet address, optionally followed by a space and one or more IP addresses</dt>
          <dd>
            OVN delivers packets for the Ethernet address to this port.
          </dd>

          <dt><code>unknown</code></dt>
          <dd>
            OVN delivers unicast Ethernet packets whose destination MAC address
            is not in any logical port's addresses column to ports with address
            <code>unknown</code>.
          </dd>

          <dt><code>dynamic</code></dt>
          <dd>
            Use this keyword to make <code>ovn-northd</code> generate a
            globally unique MAC address and choose an unused IPv4 address with
            the logical port's subnet and store them in the port's
            <code>dynamic_addresses</code> column.
          </dd>
        </dl>

        <p>
          Multiple addresses may be set.  If no <var>address</var> argument is
          given, <var>port</var> will have no addresses associated with it.
        </p>
      </dd>

      <dt><code>lsp-get-addresses</code> <var>port</var></dt>
      <dd>
        Lists all the addresses associated with <var>port</var> on standard
        output, one per line.
      </dd>

      <dt><code>lsp-set-port-security</code> <var>port</var> [<var>addrs</var>]...</dt>
      <dd>
        <p>
          Sets the port security addresses associated with <var>port</var> to
          <var>addrs</var>.  Multiple sets of addresses may be set by using
          multiple <var>addrs</var> arguments.  If no <var>addrs</var> argument
          is given, <var>port</var> will not have port security enabled.
        </p>

        <p>
          Port security limits the addresses from which a logical port may send
          packets and to which it may receive packets.  See the
          <code>ovn-nb</code>(5) documentation for the <ref
          column="port_security" table="Logical_Switch_Port"/> column in
          the <ref table="Logical_Switch_Port"/> table for details.
        </p>
      </dd>

      <dt><code>lsp-get-port-security</code> <var>port</var></dt>
      <dd>
        Lists all the port security addresses associated with <var>port</var>
        on standard output, one per line.
      </dd>

      <dt><code>lsp-get-up</code> <var>port</var></dt>
      <dd>
        Prints the state of <var>port</var>, either <code>up</code> or
        <code>down</code>.
      </dd>

      <dt><code>lsp-set-enabled</code> <var>port</var> <var>state</var></dt>
      <dd>
        Set the administrative state of <var>port</var>, either <code>enabled</code>
        or <code>disabled</code>.  When a port is disabled, no traffic is allowed into
        or out of the port.
      </dd>

      <dt><code>lsp-get-enabled</code> <var>port</var></dt>
      <dd>
        Prints the administrative state of <var>port</var>, either <code>enabled</code>
        or <code>disabled</code>.
      </dd>

      <dt><code>lsp-set-type</code> <var>port</var> <var>type</var></dt>
      <dd>
        Set the type for the logical port.  No special types have been implemented yet.
      </dd>

      <dt><code>lsp-get-type</code> <var>port</var></dt>
      <dd>
        Get the type for the logical port.
      </dd>

      <dt><code>lsp-set-options</code> <var>port</var> [<var>key=value</var>]...</dt>
      <dd>
        Set type-specific key-value options for the logical port.
      </dd>

      <dt><code>lsp-get-options</code> <var>port</var></dt>
      <dd>
        Get the type-specific options for the logical port.
      </dd>

    </dl>

    <h1>Logical Router Commands</h1>

    <dl>
      <dt><code>lr-add</code></dt>
      <dd>
        <p>
          Creates a new, unnamed logical router, which initially has no ports.
          The router does not have a name, other commands must refer to this
          router by its UUID.
        </p>
      </dd>

      <dt>[<code>--may-exist</code> | <code>--add-duplicate</code>] <code>lr-add</code> <var>router</var></dt>
      <dd>
        <p>
          Creates a new logical router named <var>router</var>, which
          initially has no ports.
        </p>

        <p>
          The OVN northbound database schema does not require logical router
          names to be unique, but the whole point to the names is to provide an
          easy way for humans to refer to the routers, making duplicate names
          unhelpful.  Thus, without any options, this command regards it as an
          error if <var>router</var> is a duplicate name.  With
          <code>--may-exist</code>, adding a duplicate name succeeds but does
          not create a new logical router.  With <code>--add-duplicate</code>,
          the command really creates a new logical router with a duplicate
          name.  It is an error to specify both options.  If there are multiple
          logical routers with a duplicate name, configure the logical routers
          using the UUID instead of the <var>router</var> name.
        </p>
      </dd>

      <dt>[<code>--if-exists</code>] <code>lr-del</code> <var>router</var></dt>
      <dd>
        Deletes <var>router</var>.  It is an error if <var>router</var> does
        not exist, unless <code>--if-exists</code> is specified.
      </dd>

      <dt><code>lr-list</code></dt>
      <dd>
        Lists all existing routers on standard output, one per line.
      </dd>
    </dl>

    <h1>Logical Router Port Commands</h1>

    <dl>
      <dt>[<code>--may-exist</code>] <code>lrp-add</code> <var>router</var> <var>port</var> <var>mac</var> <var>network</var>... [<code>peer=</code><var>peer</var>]</dt>
      <dd>
        <p>
          Creates on <var>router</var> a new logical router port named
          <var>port</var> with Ethernet address <var>mac</var> and one
          or more IP address/netmask for each <var>network</var>.
        </p>

        <p>
          The optional argument <code>peer</code> identifies a logical
          router port that connects to this one.  The following example
          adds a router port with an IPv4 and IPv6 address with peer
          <code>lr1</code>:
        </p>

        <p>
          <code>lrp-add lr0 lrp0 00:11:22:33:44:55 192.168.0.1/24 2001:db8::1/64 peer=lr1</code>
        </p>

        <p>
          It is an error if a logical router port named <var>port</var>
          already exists, unless <code>--may-exist</code> is specified.
          Regardless of <code>--may-exist</code>, it is an error if the
          existing router port is in some logical router other than
          <var>router</var>.
        </p>
      </dd>

      <dt>[<code>--if-exists</code>] <code>lrp-del</code> <var>port</var></dt>
      <dd>
        Deletes <var>port</var>.  It is an error if <var>port</var> does
        not exist, unless <code>--if-exists</code> is specified.
      </dd>

      <dt><code>lrp-list</code> <var>router</var></dt>
      <dd>
        Lists all the logical router ports within <var>router</var> on
        standard output, one per line.
      </dd>

      <dt><code>lrp-set-enabled</code> <var>port</var> <var>state</var></dt>
      <dd>
        Set the administrative state of <var>port</var>, either
        <code>enabled</code> or <code>disabled</code>.  When a port is
        disabled, no traffic is allowed into or out of the port.
      </dd>

      <dt><code>lrp-get-enabled</code> <var>port</var></dt>
      <dd>
        Prints the administrative state of <var>port</var>, either
        <code>enabled</code> or <code>disabled</code>.
      </dd>
    </dl>

    <h1>Logical Router Static Route Commands</h1>

    <dl>
      <dt>[<code>--may-exist</code>] [<code>--policy</code>=<var>POLICY</var>] <code>lr-route-add</code> <var>router</var> <var>prefix</var> <var>nexthop</var> [<var>port</var>]</dt>
      <dd>
        <p>
          Adds the specified route to <var>router</var>.
          <var>prefix</var> describes an IPv4 or IPv6 prefix for this
          route, such as <code>192.168.100.0/24</code>.
          <var>nexthop</var> specifies the gateway to use for this
          route, which should be the IP address of one of
          <var>router</var> logical router ports or the IP address of a
          logical port.  If <var>port</var> is specified, packets that
          match this route will be sent out that port.  When
          <var>port</var> is omitted, OVN infers the output port based
          on <var>nexthop</var>.
        </p>

        <p>
          <code>--policy</code> describes the policy used to make routing
          decisions.  This should be one of "dst-ip" or "src-ip".  If not
          specified, the default is "dst-ip".
        </p>

        <p>
          It is an error if a route with <var>prefix</var> already exists,
          unless <code>--may-exist</code> is specified.
        </p>
      </dd>

      <dt>[<code>--if-exists</code>] <code>lr-route-del</code> <var>router</var> [<var>prefix</var>]</dt>
      <dd>
        <p>
          Deletes routes from <var>router</var>.  If only <var>router</var>
          is supplied, all the routes from the logical router are
          deleted.  If <var>prefix</var> is also specified, then all the
          routes that match the prefix will be deleted from the logical
          router.
        </p>

        <p>
          It is an error if <code>prefix</code> is specified and there
          is no matching route entry, unless <code>--if-exists</code> is
          specified.
        </p>
      </dd>

      <dt><code>lr-route-list</code> <var>router</var></dt>
      <dd>
        Lists the routes on <var>router</var>.
      </dd>
    </dl>

    <h1>Load Balancer Commands</h1>
    <dl>
      <dt>[<code>--may-exist</code> | <code>--add-duplicate</code>] <code>lb-add</code> <var>lb</var> <var>vip</var> <var>ips</var> [<var>protocol</var>]</dt>
      <dd>
        <p>
         Creates a new load balancer named <var>lb</var> with the provided
         <var>vip</var> and <var>ips</var> or adds the <var>vip</var> to
         an existing <var>lb</var>.  <var>vip</var> should be a
         virtual IPv4 address (or an IPv4 address and a port number with
         <code>:</code> as a separator).  Examples for <var>vip</var> are
         <code>192.168.1.4</code> and <code>192.168.1.5:8080</code>.
         <var>ips</var> should be comma separated IPv4 endpoints (or comma
         separated IPv4 addresses and port numbers with <code>:</code> as a
         separator).  Examples for <var>ips</var> are <code>10.0.0.1,10.0.0.2
         </code>or <code>20.0.0.10:8800,20.0.0.11:8800</code>.
        </p>

        <p>
         The optional argument <var>protocol</var> must be either
         <code>tcp</code> or <code>udp</code>.  This argument is useful when
         a port number is provided as part of the <var>vip</var>.  If the
         <var>protocol</var> is unspecified and a port number is provided as
         part of the <var>vip</var>, OVN assumes the <var>protocol</var> to
         be <code>tcp</code>.
        </p>

        <p>
         It is an error if the <var>vip</var> already exists in the load
         balancer named <var>lb</var>, unless <code>--may-exist</code> is
         specified.  With <code>--add-duplicate</code>, the command really
         creates a new load balancer with a duplicate name.
        </p>

        <p>
         The following example adds a load balancer.
        </p>

        <p>
         <code>lb-add lb0 30.0.0.10:80
         192.168.10.10:80,192.168.10.20:80,192.168.10.30:80 udp</code>
        </p>
      </dd>

      <dt>[<code>--if-exists</code>] <code>lb-del</code> <var>lb</var> [<var>vip</var>]</dt>
      <dd>
        Deletes <var>lb</var> or the <var>vip</var> from <var>lb</var>.
        If <var>vip</var> is supplied, only the <var>vip</var> will be
        deleted from the <var>lb</var>.  If only the <var>lb</var> is supplied,
        the <var>lb</var> will be deleted.  It is an error if <var>vip</var>
        does not already exist in <var>lb</var>, unless
        <code>--if-exists</code> is specified.
      </dd>

      <dt><code>lb-list</code> [<var>lb</var>]</dt>
      <dd>
        Lists the LBs.  If <var>lb</var> is also specified, then only the
        specified <var>lb</var> will be listed.
      </dd>

      <dt>[<code>--may-exist</code>] <code>ls-lb-add</code> <var>switch</var> <var>lb</var></dt>
      <dd>
        Adds the specified <var>lb</var> to <var>switch</var>.
        It is an error if a load balancer named <var>lb</var> already exists
        in the <var>switch</var>, unless <code>--may-exist</code> is specified.
      </dd>

      <dt>[<code>--if-exists</code>] <code>ls-lb-del</code> <var>switch</var> [<var>lb</var>]</dt>
      <dd>
        Removes <var>lb</var> from <var>switch</var>.  If only
        <var>switch</var> is supplied, all the LBs from the logical switch are
        removed.  If <var>lb</var> is also specified, then only the
        <var>lb</var> will be removed from the logical switch.
        It is an error if <var>lb</var> does not exist in the
        <var>switch</var>, unless <code>--if-exists</code> is specified.
      </dd>

      <dt><code>ls-lb-list</code> <var>switch</var></dt>
      <dd>
        Lists the LBs for the given <var>switch</var>.
      </dd>

      <dt>[<code>--may-exist</code>] <code>lr-lb-add</code> <var>router</var> <var>lb</var></dt>
      <dd>
        Adds the specified <var>lb</var> to <var>router</var>.
        It is an error if a load balancer named <var>lb</var> already exists
        in the <var>router</var>, unless <code>--may-exist</code> is specified.
      </dd>

      <dt>[<code>--if-exists</code>] <code>lr-lb-del</code> <var>router</var> [<var>lb</var>]</dt>
      <dd>
        Removes <var>lb</var> from <var>router</var>.  If only
        <var>router</var> is supplied, all the LBs from the logical router are
        removed.  If <var>lb</var> is also specified, then only the
        <var>lb</var> will be removed from the logical router.
        It is an error if <var>lb</var> does not exist in the
        <var>router</var>, unless <code>--if-exists</code> is specified.
      </dd>

      <dt><code>lr-lb-list</code> <var>router</var></dt>
      <dd>
        Lists the LBs for the given <var>router</var>.
      </dd>
    </dl>


    <h1>DHCP Options commands</h1>

    <dl>
      <dt><code>dhcp-options-create</code> <var>cidr</var> [<var>key=value</var>]</dt>
      <dd>
        Creates a new DHCP Options entry in the <code>DHCP_Options</code> table
        with the specified <code>cidr</code> and optional <code>external-ids</code>.
      </dd>

      <dt><code>dhcp-options-list</code></dt>
      <dd>
        Lists the DHCP Options entries.
      </dd>

      <dt><code>dhcp-options-del</code> <var>dhcp-option</var></dt>
      <dd>
        Deletes the DHCP Options entry referred by <var>dhcp-option</var> UUID.
      </dd>

      <dt><code>dhcp-options-set-options</code> <var>dhcp-option</var> [<var>key=value</var>]...</dt>
      <dd>
        Set the DHCP Options for the <var>dhcp-option</var> UUID.
      </dd>

      <dt><code>dhcp-options-get-options</code> <var>dhcp-option</var></dt>
      <dd>
        Lists the DHCP Options for the <var>dhcp-option</var> UUID.
      </dd>
    </dl>

    <h1>Database Commands</h1>
    <p>These commands query and modify the contents of <code>ovsdb</code> tables.
    They are a slight abstraction of the <code>ovsdb</code> interface and
    as suchthey operate at a lower level than other <code>ovn-nbctl</code> commands.</p>
    <p><var>Identifying Tables, Records, and Columns</var></p>
    <p>Each of these commands has a <var>table</var> parameter to identify a table
    within the database.  Many of them also take a <var>record</var> parameter
    that identifies a particular record within a table.  The <var>record</var>
    parameter may be the UUID for a record, and many tables offer
    additional ways to identify records.  Some commands also take
    <var>column</var> parameters that identify a particular field within the
    records in a table.</p>
    <p>The following tables are currently defined:</p>
    <dl>
      <dt><code>Logical_Switch</code></dt>
      <dd>
        An L2 logical switch.  Records may be identified by name.
      </dd>

      <dt><code>Logical_Switch_Port</code></dt>
      <dd>
        A port within an L2 logical switch.  Records may be identified by name.
      </dd>

      <dt><code>ACL</code></dt>
      <dd>
        An ACL rule for a logical switch that points to it through its <var>acls</var> column.
      </dd>

      <dt><code>Logical_Router</code></dt>
      <dd>
        An L3 logical router.  Records may be identified by name.
      </dd>

      <dt><code>Logical_Router_Port</code></dt>
      <dd>
        A port within an L3 logical router.  Records may be identified by name.
      </dd>

      <dt><code>Logical_Router_Static_Route</code></dt>
      <dd>
        A static route belonging to an L3 logical router.
      </dd>

      <dt><code>Address_Set</code></dt>
      <dd>
        An address set that can be used in ACLs.
      </dd>

      <dt><code>Load_Balancer</code></dt>
      <dd>
        A load balancer for a logical switch that points to it through its <var>load_balancer</var> column.
      </dd>

      <dt><code>NAT</code></dt>
      <dd>
        A NAT rule for a Gateway router.
      </dd>

      <dt><code>DHCP_Options</code></dt>
      <dd>
        DHCP options.
      </dd>

      <dt><code>NB_Global</code></dt>
      <dd>
        North bound global configurations.
      </dd>

    </dl>

    <xi:include href="lib/db-ctl-base.xml" xmlns:xi="http://www.w3.org/2003/XInclude"/>

    <h1>Synchronization Commands</h1>

    <dl>
      <dt>sync</dt>
      <dd>
        Ordinarily, <code>--wait=sb</code> or <code>--wait=hv</code> only waits
        for changes by the current <code>ovn-nbctl</code> invocation to take
        effect.  This means that, if none of the commands supplied to
        <code>ovn-nbctl</code> change the database, then the command does not
        wait at all.  With the <code>sync</code> command, however,
        <code>ovn-nbctl</code> waits even for earlier changes to the database
        to propagate down to the southbound database or all of the OVN chassis,
        according to the argument to <code>--wait</code>.
      </dd>
    </dl>

    <h1>Options</h1>

    <dl>
      <dt><code>--no-wait</code> | <code>--wait=none</code></dt>
      <dt><code>--wait=sb</code></dt>
      <dt><code>--wait=hv</code></dt>

      <dd>
        <p>
          These options control whether and how <code>ovn-nbctl</code> waits
          for the OVN system to become up-to-date with changes made in an
          <code>ovn-nbctl</code> invocation.
        </p>

        <p>
          By default, or if <code>--no-wait</code> or <code>--wait=none</code>,
          <code>ovn-nbctl</code> exits immediately after confirming that
          changes have been committed to the northbound database, without
          waiting.
        </p>

        <p>
          With <code>--wait=sb</code>, before <code>ovn-nbctl</code> exits, it
          waits for <code>ovn-northd</code> to bring the southbound database
          up-to-date with the northbound database updates.
        </p>

        <p>
          With <code>--wait=hv</code>, before <code>ovn-nbctl</code> exits, it
          additionally waits for all OVN chassis (hypervisors and gateways) to
          become up-to-date with the northbound database updates.  (This can
          become an indefinite wait if any chassis is malfunctioning.)
        </p>

        <p>
          Ordinarily, <code>--wait=sb</code> or <code>--wait=hv</code> only
          waits for changes by the current <code>ovn-nbctl</code> invocation to
          take effect.  This means that, if none of the commands supplied to
          <code>ovn-nbctl</code> change the database, then the command does not
          wait at all.  Use the <code>sync</code> command to override this
          behavior.
        </p>
      </dd>

    <dt><code>--db</code> <var>database</var></dt>
    <dd>
      The OVSDB database remote to contact.  If the <env>OVN_NB_DB</env>
      environment variable is set, its value is used as the default.
      Otherwise, the default is <code>unix:@RUNDIR@/db.sock</code>, but this
      default is unlikely to be useful outside of single-machine OVN test
      environments.
    </dd>
    </dl>

    <h1>Logging options</h1>
    <xi:include href="lib/vlog.xml" xmlns:xi="http://www.w3.org/2003/XInclude"/>
    <h2>PKI Options</h2>
    <p>
      PKI configuration is required to use SSL for the connection to the
      database.
    </p>
    <xi:include href="lib/ssl.xml" xmlns:xi="http://www.w3.org/2003/XInclude"/>

    <h2>Other Options</h2>

    <xi:include href="lib/common.xml" xmlns:xi="http://www.w3.org/2003/XInclude"/>

</manpage>