All, I am working on an SDN project using Floodlight (v1.1) as a controller and Mininet (v2.1.1) as my network emulator; I have OVS 2.3.2 installed. My computer is running Ubuntu 14.04 and I am not using any VMs.
I am trying to get my controller to respond to a network event (i.e. a link goes down) and have it respond appropriately. The issue I am having is that when I try to stimulate the response by bringing a link down, it automatically reverts back to an UP state. At first I suspected the controller but, through a series of tests, have concluded the it pitentially an issue with OVS (or me). I have seen the behavior in various configurations but I will explain the simplest which removes Floodlight and Mininet from the equation. I manually created two switches which are connected; I have one host on each switch. When I brink down a link (ovs-ofctl mod-port s1 2 down) I am able to see the link in fact is down by reviewing "ovs-ofctl show s1" and seeing "config: PORT-DOWN" and "state: LINK-DOWN" for s1-eth2. After a couple minutes, this link then goes back to an UP state (i.e. 0's). Any thoughts on where I might be going wrong? I have not seen any discussions on this specific issue but have seen other issues addressed by just removing the port but a) that does not explain the issue and b) is not a solution that want to implement. Thanks in advance.
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