SDN Mininet | RYU | Creating Topologies

I am working with SDNs, specifically using mininet to create various topologies like tree, fat tree, and linear. These topologies are connected to the Ryu controller for flow monitoring, with OVSK switches and TC links with specific settings like bw=0.01MBps, delay=1s, loss=50-90%, queue size=5-100packets, and use_htp=True. I have attempted to modify the queue and QoS using the command "ovs-vsctl -- set Port s1-eth1 qos=@newqos .....", but despite these efforts, the monitored flow shows consistently zero collisions and Tx/Rx drop/errors. I have used continuous ping, Iperf3, and python server/clients script to generate traffic.

I am seeking a dataset that includes non-zero values for collisions and Tx/Rx drop/error, and I am willing to pay for both the dataset and the methodology used to obtain it. I have a Ryu script that can assist in flow monitoring.