Ryu Controller - Traffic Monitor (Cont.)

- Try to block a flow if the traffic of that flow is abnormally large!

- A traffic monitor request switches info for every 5 seconds

- Topology: Tree topology with depth=2 and fanout=3

- Try: h1 ping h9 and see the flow entries of switches

- Now try a huge traffic: h1 ping h9 -i 0.0005

- Calculate the traffic (# of pkt/secs) and block the flow for seconds (set as 1000 secs here)
- h1 cannot ping h9 now

P.S.
- If there are more than one match in flow table, the flow with higher priority will be matched.
- A flow with empty action could drop the packets.
- Adding "hard_timeout" attribute in add_flow function could specify the expire time of the rule.