Dear all,
I am starting to work with SDN concepts and I am noticing there is a lot of
challenging issues behind this paradigm. After solving the ARP flooding
problems (thanks to contributors of the mailing list), I have discovered
another interesting issue.
I am working with the mininet(OpenVswitch) +Ryu environment and I am trying
to get familiar with rules and flow tables. In order to do so, I use iperf
to generate traffic. My question comes here:
Normally, I work with UDP flows of 1M and I have realised that there are
some packets that are out-of order. This is due to the latency in the
communication between switch and controller. Of course, if I increase the
bit rate of the flow, more out-of-order packets are produced.
Is there any way to control it? I mean, can we configure the openvswitch to
buffer packets until the packet-in is received?
I have came out with a solution that is to store information about flows
and datapath ids at the controller to discard the packet in messages if the
come replicated, but I think is not a smart enough solution. What do you
think?
(when I say discard is to return from the _packet_in_handler function of
the app "simple_switch_13.py" without doing anything)
Thank you very much for your time and attention,
Kind regards,
Jordi Baranda
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