Openflow in ns3

[Aswanth P P]

Hi all!

We have created a topology with 2 switches connected to a single controller as shown below:

Network topology:

                Controller

                    *

                  *   *

                *       *  

             *             *

       --------------     ---------------

       | Switch1 |----| Switch2  |

       --------------     --------------- 

           |         |        |               |   

          n1      n2     n3           n4

Source code for the same is attached below.

We have created normal traffic from n1 to n4. But  switches are just broadcasting packets, i.e., the controller is not learning. A sample of  output is given below:

UID is 1

Received packet from 00:00:00:00:00:03 looking for ff:ff:ff:ff:ff:ff

Creating Openflow buffer from packet.

Parsed EthernetHeader

Parsed ArpHeader

Matching against the flow table.

Flow not matched.

Sending packet to controller

Input Port ____0

UDPSRC_____0

Dest_____0

Is this a problem in the controller logic or do we need to modify our source code? Any kind of help will be much appreciated!

Regards

Aswanth P P