Hi Windhya, Topology is usually discovered using LLDP frames. If you are using Floodlight as your controller, you should see some PacketOuts and PacketIns with this term. The topology discovery is a proactive action taken by the controller periodically, and lasts as long as is needed to send PacketOuts with LLDP, collect all PacketIns and build the topology graph based on them.
-- Henrique Rodrigues http://www.dcc.ufmg.br/~hsr On Monday, September 30, 2013, Windhya Rankothge wrote: > Hi all, > > For my experiments, I want to measure the time taken for the openflow > topology discovery.. I am using wireshark to analyze the traffic.. > > I can see many entries with OFP protocol.. > Is the "OFP : hello messages" are regarding to this openflow topology > discovery process ?? > > I would like to know more information on these messages and how to > intepret them.. > > Highly appreciate any help on this.. > > > Best Regards, > > Windhya Rankothge.... > -- Henrique Rodrigues http://www.dcc.ufmg.br/~hsr
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