Hi,

I am new to ODL and I couldn't find a users mailing list. I hope this is
the right one.

I was trying to do an experiment with the ODL controller and mininet. I
needed reactive flows and since l2switch was not included in the latest
fluorine release I used Carbon instead, for now. This is the topology that
I am using for my experiment.

[image: 02-hostsfound.png]
But the flow table entries for the  OVS switch in mininet was (for switch
OpenFlow:1):


NXST_FLOW reply (xid=0x4):
 cookie=0x2b00000000000002, duration=30.63s, table=0, n_packets=0,
n_bytes=0, idle_age=30, priority=2,in_port=3
actions=output:2,output:1
 cookie=0x2b00000000000001, duration=30.633s, table=0, n_packets=0,
n_bytes=0, idle_age=30, priority=2,in_port=1
actions=output:2,output:3,CONTROLLER:65535
 cookie=0x2b00000000000000, duration=30.636s, table=0, n_packets=0,
n_bytes=0, idle_age=30, priority=2,in_port=2
actions=output:1,output:3
 cookie=0x2b00000000000004, duration=36.03s, table=0, n_packets=14,
n_bytes=1190, idle_age=4, priority=100,dl_type=0x88cc
actions=CONTROLLER:65535
 cookie=0x2b00000000000004, duration=36.03s, table=0, n_packets=0,
n_bytes=0, idle_age=36, priority=0 actions=drop

It seems that the packets are being flooded to all the other ports all the
time. At first, I thought it was for LLDP packets, but the flow entries are
not changing even after sending traffic between the hosts and even after
removing one of the paths from host1 to host2. The main requirement for me
is that we get a traffic matrix and that the connectivity retains even
after links are switched off. But here the traffic through all the other
ports will be the same for a  switch and thus can't find the way traffic is
behaving.


   1.  Am I doing something wrong or is there some configuration in the
   l2switch feature that I need to change?
   2. ODL being a well-known controller is there any other way by which we
   can achieve reactive flows (other than using l2switch).

PS: Where do I begin if I wanted to get involved in the development and get
the l2switch feature for a later release of ODL.
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