Hi Charles, Nox can learn the topology of the local network though packet_in (when clients sent out packets that don't match a flow entry in the datapath). In addition you could program NOX to probe machines via arp request or some other manor in order to get hosts to speak (and then learn about them from the packet_in).
Right now I don't believe there is a discovery protocol for switches to find controllers. You need to preconfigure the openflow switches with the controller's IP/port. Aaron On Mon, Mar 12, 2012 at 5:31 AM, Charles-Alexandre Lelu <[email protected]> wrote: > Hello everyone, > > I am quite new in the nox thing and wanted to know if it was possible for a > controller to retrieve the topology of a local > network (one openflow switch/one nox controller). So I can see how many > devices (IP address) are actually in the network and on which port they are > connected. > Also, I wanted to know if it was possible for a controller to connect to an > OF switch knowing it IP address. or if isn't, can the switch discover the > controller by itself considering that the switch does not know neither the IP > address and the listening port of the controller. > > Thanks in advance, > Cheers > Charles -- Aaron O. Rosen Masters Student - Network Communication 306B Fluor Daniel
