Hi,
I have just started writing controllers using Openflow. I am using Mininet
2.0.0 to create a network with 2 OVS Switches. I wrote a controller that
behaves like a learning switch, similar to what is shown in l2_learning.py.
I was trying to view the flows I installed by issuing the dpctl command to the
switch in my terminal as:
mininet@mininet-vm:~/pox$ dpctl show tcp:127.0.0.1:6633
dpctl: talking to tcp:127.0.0.1:6633: unexpected end of file
I am running mininet and controller in the same virtual image and hence,
127.0.0.1.
I am getting the following error on my controller(pox) terminal:
ERROR:openflow.of_01:[Con 5/None]: Exception while handling OpenFlow message:
[Con 5/None] ofp_features_request
[Con 5/None] header:
[Con 5/None] version: 1
[Con 5/None] type: 5 (OFPT_FEATURES_REQUEST)
[Con 5/None] length: 8
[Con 5/None] xid: 862702809
Traceback (most recent call last):
File "/home/mininet/pox/pox/openflow/of_01.py", line 622, in read
h(self, msg)
TypeError: 'NoneType' object is not callable
I am not able to figure out why this error is caused. Should I be handling
anything in my controller code?
Any pointers will be helpful.
Thanks!
Navina
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