def bd_total_range_with_vlans
      hash = Vlan.vlans
      arr = []
      hash.keys.each do |id|
        arr << id.to_i
      end
      Utils.array_to_str(arr)
      ret_arr = []
      ret_arr << Utils.array_to_str(arr)
    end
def bd_total_range_with_vlans
      hash = Vlan.vlans
      arr = []
      hash.keys.each do |id|
        arr << id.to_i
      end
      Utils.array_to_str(arr)
      ret_arr = []
      ret_arr << Utils.array_to_str(arr)
    end
bridge-domain and vlans are mutually exclusive
 so when there are vlans, we need to remove them
 from the bd range while restting