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.. _common_node_attributes:

``ref``
-------

Human readable name used as reference for the |NODE|. Not used in code.

``hostname``
------------

The hostname of the |NODE|. This will be used to reference the |NODE|.

``operating_state``
-------------------

The initial operating state of the node.

Optional. Default value is ``ON``.

Options available are:

- ``ON``
- ``OFF``
- ``BOOTING``
- ``SHUTTING_DOWN``

Note that YAML may assume non quoted ``ON`` and ``OFF`` as ``True`` and ``False`` respectively. To prevent this, use ``"ON"`` or ``"OFF"``

See :py:mod:`primaite.simulator.network.hardware.node_operating_state.NodeOperatingState`


``dns_server``
--------------

Optional. Default value is ``None``.

The IP address of the node which holds an instance of the :ref:`DNSServer`. Some applications may use a domain name e.g. the :ref:`WebBrowser`

``start_up_duration``
---------------------

Optional. Default value is ``3``.

The number of time steps required to occur in order for the node to cycle from ``OFF`` to ``BOOTING_UP`` and then finally ``ON``.

``shut_down_duration``
----------------------

Optional. Default value is ``3``.

The number of time steps required to occur in order for the node to cycle from ``ON`` to ``SHUTTING_DOWN`` and then finally ``OFF``.