Hi Kyriakos, Thank you very much for this clear answer, now I don't get the error. I will have an other question. Now, when I ping between two host, I get the information of this ping on my controller, I use the NOX GUI right now and I have tried a lot of different controller. But all the time, I get almost the same problem. I don't see any flow. I was thinking by pinging between two host the informations would go to my controller and these informations wil be display on the GUI. In my case, I just get the topology, not more.
2012/5/9 Kyriakos Zarifis <[email protected]> > Hi Julien, > > you get this because your network has a loop, and pyswitch doesn't deal > with loop (unless you run spanning_tree with it) > pyswitch initially floods packets for which it doesn't know where the > destination is, and keeps track of where it received packets from given > source hosts. > For example, in your plan1 topology, when client1 sends a packet to > client2 or client3, OFswitch1 will register that client1 is on its port1, > and will then flood the packet to the other 2 ports. > Since there is a loop, however, those flooded packets will return back to > those 2 "internal" ports (2 and 3), and that's when you get that message. > > > On Wed, May 9, 2012 at 5:30 AM, Julien Ratinaud <[email protected]>wrote: > >> Hello everybody, >> >> I am student in Bachelor Computer Networks and Telecommunications and the >> project I have to realized for the end of my year is to create an Openflow >> network. I am currently using a NOX controller which is connected to three >> openflow switch. My three Openflow switch are well connected to my >> controller. But, when I am launching a ping for example, I am getting this >> error on my controller : >> >> *pyswitch|ERR:'**warning** learned port = inport'* >> *pyswitch|ERR:'**warning** learned port = inport'* >> * >> * >> *My topology** : **http://hpics.li/f8a9209 and http://hpics.li/ee64160* >> * >> * >> Thank You ! >> * >> * >> * >> * >> * >> * >> >> * >> * >> * * >> * >> * >> * >> * >> * >> * >> * >> * >> > >
