TestCases to send packets to the switch are failing

[VijayM02]

I have created a simple mininet topology (1 controller, 1 switch and 2 host) and ran the topology.

Then after I ran the oftest suite by following all the steps as mentioned in the doc
TestCases that use SimpleProtocol Class i.e. all those dealing with communication between controller and switch are passing,
while the TestCases using SimpleDataPlane Class( i.e. to send packets to the switch and among different interfaces) are failing.
E.g. Classes like PacketIn, PacketOut of basic.py file are failing at verify_packet() function check.

Can you please tell if there are any more prerequisites for running oftest suite
Do we need to make any changes in the configuration files ?

run_switch.py (file used for creating interfaces) that we run before running the oftest creates interfaces on different networks. We even tried putting the interfaces in the same network. But it even didn't help.

Thanks