Monitoring integration

As you start to migrate more devices toward OpenFlow, it becomes increasingly important to monitor the links. We discussed various monitoring tool options in Chapter 7, Network Monitoring with Python – Part 1 and Chapter 8, Network Monitoring with Python – Part 2. Next we can easily integrate monitoring for the migrated devices. We will show the built-in topology viewer that came with Ryu (http://ryu.readthedocs.io/en/latest/gui.html). For easier demonstration, I have used the same Mininet topology we saw earlier in the chapter, but have changed the controller port back to 6633 in chapter13_mininet_3.py:

net = Mininet( controller=RemoteController, switch=OVSKernelSwitch )
c1 = net.addController('c2', controller=RemoteController,
 ip='127.0.0.1', port=6633)

Launch the Mininet topology and the Gui Topology application:

# Mininet Topology
$ sudo python mastering_python_networking/Chapter13/chapter13_mininet_3.py

# Ryu Application
$ PYTHONPATH=. ./bin/ryu run --observe-links...