ELEC5517: Software Defined Networks
Project II with ONOS controller
Background
In Information Technology (IT) environment, topologies such as single, linear and tree can be
utilised to connect all IT services. Depending on the nature of business and interdependencies
amongst IT services, the arrangement of nodes must support efficient operation across the
business. Imagine an Internet Service Provider (ISP) providing related IT services to various
customers in the telecommunications, banks, and media industries. In this project, your task is
to create a simple tree topology based on the IT services provided to these industries. Below is
an example of a tree network topology having two levels of switches and a fanout of three (3).
h1 h2 h4h3 h5 h6 h8h7
s3s2 s4
s1
h9
Poor
bandwidth
path

Figure 1: Tree Network Topology
Please perform the following tasks based on the required topology as specified in the
background section:
Task 1:
I. Create a topology showing these industries in a network controlled by the ISP.
Please avoid exchange of information amongst these industries.
II. Send HTTP amongst nodes and capture the OpenFlow packets. Analyse the
captured packets for each industry and show possible similarities and differences of
the results.
III. Show and assign the bandwidth paths to these industries based on the properties
below:
a. Voice network
b. Data network
c. Integrated voice and data network
Task 2:
We are required to speed up the network paths as a result of unforeseen delays affecting the
network. These delays can have impacts on the read and write access in the network. Based on
the new speed on the network paths, specify the bandwidth paths and corresponding industries
to be assigned the following properties in the Mininet environment:
I. Read access
II. Write access
III. Read and write access
IV. Show the similarities between the results I, II and III above.

Task 3:
Based on the created topology as specified in the background, the ISP has decided to divide
the network into two to support inter-communication amongst two industries. In this
customised topology, two industries are allowed to communicate with each other while the
third industry should not be able communication with the others. Bandwidth paths are equal
across all the switches. Below is an example of a sliced topology based on the Figure 1.
h1 h2 h4h3 h5 h6 h8h7
s3s2 s4
s1
h9

Figure 2: Sliced Tree Network Topology

Perform the following tasks based on the new sliced topology:
I. Implement the customised topology using ONOS as the controller.
II. Use ONOS flow endpoint API to achieve isolation of the third industry from the
rest of the network.
III. Display and analyse flow statistics at each of the edge switches using ONOS flow
statistics end point API.
IV. Using host endpoint API please add a new host to edge switch s4.

Please submit all your codes along with the results of this project. Good luck!
ELEC5517 Teaching Team

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