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Topology Discovery

In this section, we discuss how RYU controller discovers the topology.

  1. Switch Discovery

LLDP(Link Layer Discovery protocol)

  1. Host Discovery

(write our algo in the packet_in handler to discover the hosts, connected in the switch)

Program overview:

Testing

# References:

  1. https://en.wikipedia.org/wiki/Link_Layer_Discovery_Protocol

  2. http://vlkan.com/blog/post/2013/08/06/sdn-discovery/

  3. https://sdn-lab.com/2014/12/25/shortest-path-forwarding-with-openflow-on-ryu/

  4. https://github.com/castroflavio/ryu/blob/master/ryu/app/shortestpath.py