Hi Minh, As far as I know, most controllers will include OpenFlow protocol implementation. They communicate with switches by OpenFlow message. In this way, ovs-ofctl makes no difference, it sends / receives messages via sockets (unix, tcp, etc.). Some controller might also have OVSDB southbound, which manipulates OVS bridges as ovs-vsctl. Some applications (like Openstack, IIRC) might have an agent running on the host to call OVS utils.
Thanks, Xiao From: discuss [mailto:[email protected]] On Behalf Of Minh Nghiem Gia Sent: Tuesday, September 15, 2015 16:43 To: [email protected] Subject: [ovs-discuss] way to speak with OpenFlow module Hello, It is easy to push OpenFlow rules to OVS by using the OVS utility such as ovs-ofctl. Thanks all OVS developers! However, I now want to try that function with a SDN controller and I wonder that does the SDN controller (i.e., pox, nox or floodlight) will call ovs-ofctl to install OF flows or they implement their own way (which probably works in a similar way to ovs-ofctl) to complete that tasks? Anyone please help on my dummy question. Thanks a lot, Minh.
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