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.. _nova-amqp:

.. list-table:: Description of AMQP configuration options
   :header-rows: 1
   :class: config-ref-table

   * - Configuration option = Default value
     - Description
   * - **[DEFAULT]**
     -
   * - ``control_exchange`` = ``openstack``
     - (String) The default exchange under which topics are scoped. May be overridden by an exchange name specified in the transport_url option.
   * - ``default_publisher_id`` = ``None``
     - (String) Default publisher_id for outgoing notifications
   * - ``transport_url`` = ``None``
     - (String) A URL representing the messaging driver to use and its full configuration. If not set, we fall back to the rpc_backend option and driver specific configuration.