.. code-block:: json

    { "isis": { "external": {} } }


.. list-table::
   :widths: 25 50 25
   :header-rows: 1

   * - Attribute
     - Description
     - Default
   * - `purge`
     - Automatically purge all external LSP during teardown
     - true
   * - `auto-refresh`
     - Automatically refresh all external LSP
     - false
   * - `mrt-file`
     - ISIS MRT file
     - 