утилита для запроса и настройки базы данных OVN_Southbound  (utility for querying and configuring OVN_Southbound database)
  
Описание (Description)
The ovn-sbctl program configures the OVN_Southbound database by
       providing a high-level interface to its configuration database.
       See ovn-sb(5) for comprehensive documentation of the database
       schema.
       ovn-sbctl connects to an ovsdb-server process that maintains an
       OVN_Southbound configuration database.  Using this connection, it
       queries and possibly applies changes to the database, depending
       on the supplied commands.
       ovn-sbctl can perform any number of commands in a single run,
       implemented as a single atomic transaction against the database.
       The ovn-sbctl 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.