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Topology Viewer
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os_ken.app.gui_topology.gui_topology provides topology visualization.

This depends on following os_ken applications.

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os_ken.app.rest_topology Get node and link data.
os_ken.app.ws_topology   Being notified change of link up/down.
os_ken.app.ofctl_rest    Get flows of datapaths.
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Usage
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Run mininet (or join your real environment)::

    $ sudo mn --controller remote --topo tree,depth=3

Run GUI application::

    $ PYTHONPATH=. ./bin/os_ken run --observe-links os_ken/app/gui_topology/gui_topology.py

Access http://<ip address of os_ken host>:8080 with your web browser.

Screenshot
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.. image:: gui.png
   :width: 640 px