====== RYU ======

==== Installation: ====

[[ne:sdn:ryu:ryu_install|Install]]

==== Tutorials: ====

  * http://sdnhub.org/tutorials/ryu/
  * https://thenewstack.io/sdn-series-part-iv-ryu-a-rich-featured-open-source-sdn-controller-supported-by-ntt-labs/

==== Run with Mininet ====

  * https://stackoverflow.com/questions/37998065/understanding-ryu-openflow-controller-mininet-wireshark-and-tcpdump
  * https://github.com/osrg/ryu/wiki/OpenFlow_Tutorial
  * https://dokuwiki.alu4u.com/doku.php?id=einstieg-in-sdn-mit-mininet-vm-und-ryu-controller
  * https://www.grotto-networking.com/SDNfun.html
==== First App Tutorial ====
   * http://ryu.readthedocs.io/en/latest/writing_ryu_app.html
   * https://inside-openflow.com/2016/07/21/ryu-api-dissecting-simple-switch/
==== Topology Discovery ====

   * https://github.com/Ehsan70/RyuApps/blob/master/TopoDiscoveryInRyu.md
   * https://sdn-lab.com/2014/12/31/topology-discovery-with-ryu/
   * https://sdn-lab.com/2014/12/25/shortest-path-forwarding-with-openflow-on-ryu/
   * http://forums.northboundnetworks.com/index.php?topic=322.0
   * http://ryu.readthedocs.io/en/latest/gui.html

<code bash>
> sudo service openvswitch-testcontroller stop
> sudo mn --topo linear,3 --switch ovsk --controller remote #oder
> sudo mn --topo tree,depth=3 --switch ovsk --controller remote
> ryu-manager --observe-links RyuApps/topo_learner_nx.py
</code>

=== Latency aware routing ===
   * https://de.slideshare.net/KnightBaron/designing-of-sdnassisted-bandwidth-and-latency-aware-route-allocation
==== Paket Library ====
  * http://ryu.readthedocs.io/en/latest/library_packet.html

==== Testing / Benchmarking ====
  * https://sourceforge.net/p/ryu/mailman/message/35802984/
==== Ryu als IPv6 ND Proxy ====
   * [[https://www.hindawi.com/journals/scn/2017/5838657/|Paper: An SDN-Based Authentication Mechanism for Securing Neighbor Discovery Protocol in IPv6 ]]

   * https://osrg.github.io/ryu-book/en/html/traffic_monitor.html
   * https://osrg.github.io/ryu-book/en/html/switching_hub.html#implementation-of-switching-hub-using-ryu
   * https://stackoverflow.com/questions/40485109/matching-tcp-flows-based-on-tcp-ports-ryu-controller

Matching
   * http://www.openvswitch.org//support/dist-docs/ovs-fields.7.pdf
   * https://stackoverflow.com/questions/40485109/matching-tcp-flows-based-on-tcp-ports-ryu-controller

Scapy:
   * http://linton.tw/2015/01/26/saving-captured-packets-in-ryu-controller/
   * https://www.sdnlab.com/17993.html
   * http://scapy.readthedocs.io/en/latest/extending.html
==== REST API ====

1.  run mininet
     $ sudo mn --topo single,2 --mac --switch ovsk --controller remote -x
2. set OpenFlow version to s1
     s1> ovs-vsctl set Bridge s1 protocols=OpenFlow13
3. run application
     c0> ryu-manager ryu/app/simple_switch_13.py ryu/app/ofctl_rest.py
4. send ping
     mininet> h1 ping h2
5. get flow stats
     c0> curl -X GET http://localhost:8080/stats/flow/1
     #(I got "OUTPUT:CONTROLLER", "OUTPUT:1", "OUTPUT:2")
6. clear flows
     c0> curl -X DELETE http://localhost:8080/stats/flowentry/clear/1
7. send ping again
     mininet> h1 ping h2
     #(the ping is not reachable at this time)
8. get flow stats
     c0> curl -X GET http://localhost:8080/stats/flow/1
     #(I got no flows)

Source: https://sourceforge.net/p/ryu/mailman/message/35979349/

Noch ausprobieren: https://inside-openflow.com/2016/06/23/interactive-ryu-with-postman/