.. code-block:: json

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

+-----------------------------------+----------------------------------------------------------------------+
| Attribute                         | Description                                                          |
+===================================+======================================================================+
| **purge**                         | | Automatically purge all external LSP during teardown. This option  |
|                                   | | requires a reasonable teardown-time depending on the database size.|
|                                   | | Default: true                                                      |
+-----------------------------------+----------------------------------------------------------------------+
| **auto-refresh**                  | | Automatically refresh all external LSP.                            |
|                                   | | Default: false                                                     |
+-----------------------------------+----------------------------------------------------------------------+
| **mrt-file**                      | | MRT file                                                           |
+-----------------------------------+----------------------------------------------------------------------+
