Operating System: All
Platform: All

Equal role is a required functionality and it's good to provide an configuration knob that can be used to enable/disable the equal role. But this will have impact on the openflowplugin dependent applications as well. So to enable the equal role functionality we will to carefully review applications and what changes are required there.

To answer your question about switch connecting to single controller, in that case controller will always send master role to the device. Although when switch initially connect, it blindly sends the slave role to the device, but once clustering service determine the owner ( in this case only one controller is connected to the device, so it;s going to be the owner of device), it will send the master role. So eventually switch should have the master role in it. If you don't see this behavior please open an bug for this issue.

xiaoxiaome2008@163.com Equal role is not implemented in master branch and oxygen branch. You need to enable the config knob (enable-equal-role=true)  in openflowplugin.cfg file to enable it. Please re-open the bug if you don't see that fixes your problem.