|Stable| |Tag| |License| |Build| |Coverage| |Quality|

.. raw:: html

Overview

This NApp is responsible for tracking the network topology and supplying network topology information to any NApp that requires it.

This NApp intends to be protocol agnostic. Therefore, if you want to provide network topology data from any network protocol, check the listened events section and generate them from your NApp.

Installing

To install this NApp, first, make sure to have the same venv activated as you have kytos installed on:

.. code:: shell

$ git clone https://github.com/kytos-ng/topology.git $ cd topology $ python3 -m pip install --editable .

To install the kytos environment, please follow our development environment setup <https://github.com/kytos-ng/documentation/blob/master/tutorials/napps/development_environment_setup.rst>_.

Requirements

• kytos/of_core <https://github.com/kytos-ng/of_core.git>_
• MongoDB <https://github.com/kytos-ng/kytos#how-to-use-with-mongodb>_

Events

Subscribed

• .*.switch.(new|reconnected)
• .*.connection.lost
• .*.switch.interface.created
• .*.switch.interface.deleted
• .*.switch.interface.link_up
• .*.switch.interface.link_down
• .*.switch.port.created
• .*.switch.port.modified
• .*.switch.port.deleted
• .*.interface.is.nni
• .*.network_status.updated
• kytos/core.interface_tags
• kytos/maintenance.start_link
• kytos/maintenance.end_link
• kytos/maintenance.start_switch
• kytos/maintenance.end_switch
• kytos/.*.liveness.(up|down)
• kytos/.*.liveness.disabled
• kytos/topology.notify_link_up_if_status

Published

kytos/topology.topology_loaded

Event reporting that the topology was loaded from the database. It contains the
most updated topology.

Content:

.. code-block:: python3

   {
     'topology': <Topology object>,
     'failed_switches': {<description of failed switches>},
     'failed_links': {<description of failed links>}
   }

kytos/topology.updated

Event reporting that the topology was updated. It contains the most updated topology.

Content:

.. code-block:: python3

{ 'topology': }

kytos/topology.switch.enabled

Event reporting that the switch was enabled. It contains the switch id.

Content:

.. code-block:: python3

   {
     'dpid': <switch.id>
   }

kytos/topology.switch.disabled

Event reporting that the switch was disabled. It contains the switch id.

Content:

.. code-block:: python3

{ 'dpid': }

kytos/topology.link.up

Event reporting that the link was changed to 'up'. It contains the link instance.

Content:

.. code-block:: python3

   {
     'link': <Link object>
   }

kytos/topology.link.down

Event reporting that the link was changed to 'down'. It contains the link instance.

Content:

.. code-block:: python3

{ 'link': }

kytos/topology.(switches|interfaces|links).(added|removed)

Event reporting metadata changes. 

Content:

.. code-block:: python3

   {
     'switch|interface|link': <object>,
     'metadata': object's metadata dict
   }

.. |License| image:: https://img.shields.io/github/license/kytos-ng/kytos.svg
   :target: https://github.com/kytos-ng/topology/blob/master/LICENSE
.. |Build| image:: https://scrutinizer-ci.com/g/kytos-ng/topology/badges/build.png?b=master
  :alt: Build status
  :target: https://scrutinizer-ci.com/g/kytos-ng/topology/?branch=master
.. |Coverage| image:: https://scrutinizer-ci.com/g/kytos-ng/topology/badges/coverage.png?b=master
  :alt: Code coverage
  :target: https://scrutinizer-ci.com/g/kytos-ng/topology/?branch=master
.. |Quality| image:: https://scrutinizer-ci.com/g/kytos-ng/topology/badges/quality-score.png?b=master
  :alt: Code-quality score
  :target: https://scrutinizer-ci.com/g/kytos-ng/topology/?branch=master
.. |Stable| image:: https://img.shields.io/badge/stability-stable-green.svg
   :target: https://github.com/kytos-ng/topology
.. |Tag| image:: https://img.shields.io/github/tag/kytos-ng/topology.svg
   :target: https://github.com/kytos-ng/topology/tags

kytos/topology.notify_link_up_if_status

Event reporting that the link was changed to 'down'. It contains the link instance.

Content:

.. code-block:: python3

{ 'reason': 'link enabled' 'link': }

kytos/topology.link.deleted

Event reporting that a link was deleted. It contains the link instance.

Content:

.. code-block:: python3
  {
    'link': <Link object>
  }

kytos/topology.switch.deleted

Event reporting that a switch was deleted. It contains the switch instance.

Content:

.. code-block:: python3 { 'switch': }

kytos/topology.link.(enabled|disabled)

Event reporting that a link status has changed to enabled or disabled.

Content:

.. code-block:: python3
  {
    'link': <switch object>
  }