There's a ConnectionDown event when switches disconnect. For hosts, it's possible you'll see this reflected in port status. Also, the host_tracker component tries to track the state of hosts. But in the case of hosts, it's all really just inference -- the only entities OpenFlow is really concerned with are switches.
Hope that helps. -- Murphy On Nov 13, 2013, at 10:47 PM, Muhammad Furqan Gagan <furqan.ga...@gmail.com> wrote: > Hello.. > > I want to clear all the data that my switches stored when they disconnect. is > there any way to track disconnection of switches and host? > > Any idea? > > Thanks > > Muhammad
