.. _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 .. vi: textwidth=78