On Tue, Feb 07, 2012 at 09:58:04AM +0530, selen jia wrote: > I used the ovs-vswitchd.conf.db table for controller to set master and > slave controller. The controller table reports a controller connection's current role. It cannot be used to set a role. To set a role, use the NXT_ROLE_REQUEST request documented in nicira-ext.h.