.. _network_config_eni:

Network Configuration ENI (Legacy)

----------------------------------

`Cloud-init`_ supports reading and writing network config in the ``ENI``

format which is consumed by the ``ifupdown`` tool to parse and apply network

configuration.

As an input format this is **legacy**.  In cases where ENI format is available

and another format is also available, it will prefer to use the other format.

This can happen in either :ref:`datasource_nocloud` or

:ref:`datasource_openstack` datasources.

Please reference existing `documentation`_ for the

``/etc/network/interfaces(5)`` format.

.. _Cloud-init: https://launchpad.net/cloud-init

.. _documentation: http://manpages.ubuntu.com/manpages/trusty/en/man5/interfaces.5.html

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