Day 57: Scaling up the network

The controller architecture is now almost complete. It is highly available since the switch-over mechanism takes care of longevity of running controller even under a DoS attack. I tried to drop few packets in the load balancer based on the threshold as decided in the Day 45's post.

This would only mean dropping even legitimate packets and would increase the false positives. Thus I have decided not to pursue a thresholding mechanism before contacting the ML server. Suppose I already decide to drop few packets before contacting the ML server, the data sent to ML server would be incomplete and thus incorrect.

Also, if a threshold is decided even before sending the data to the ML server, there will be some bias introduced in the dataset which the ML model wouldn't be aware of. Thus, I am dropping the idea of threshold from the implementation of a secure distributed SDN controller architecture.

The only important phase left in the project is to check for scalability. If the controller architecture can handle more than 1 FX switch in the SDN network side. So far we have only experimented with only 1 FX switch. Now, I have increased the SDN network to having 3 switches. A video would be soon uploaded to show the same set-up and working. The load balancer code seen in Day 53's post is as per the scalable topology.

Refer to previous and next posts here.

Author: Shravanya
Co-author: Swati

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