My first guess is that you're not installing flows that match multiple UDP packets, so every UDP packet is being sent as a packet_in to NOX and then back to the switch as a packet_out or flow_mod. You can confirm this by using the OpenFlow dissector for Wireshark and monitoring the switch<-->controller traffic.
-- Murphy On Mar 27, 2012, at 9:47 AM, Francesco Pocci wrote: > Hi guys, > I'm testing a network that uses the OpenFlow protocol and nox as > controller, and I am using iperf to test it. The results I get are > strange, because when I use iperf with TCP packets the resulting > bandwith is 30MBits/sec, while when using iperf with UDP the resulting > bandwidth 1.05MBits/sec and this happens in every test that I make. > the topology of my net is > > nox > | > pc1--------OFswitch------pc2 > > are there limitations in controller nox for UDP packets? > what could be the problem ? > best regards > F.P.
