This object specifies whether check for non-DFS channel should be done on DCA channel list or not. Generally at least one non-DFS channel should be present in DCA channel list. But there are locations like EU(European Union) where there is no non-DFS channel available for outdoor deployment. Customers deploying outdoor APs in EU or regions with similar regulations should set this variable to 'true'. When set to 'true' Controller will not perform check for non-DFS channels in DCA list.