Need to correctly configure the template's options.

pull the config through the bridged interface configuration routine

template debugging

add another test line

set the setting in the correct areas, yay dynamic method calls

lib/vagrant/action/vm/network.rb

@@ -389,13 +389,14 @@ module Vagrant
             :type        => :bridged,
             :bridge      => chosen_bridge,
             :mac_address => config[:mac],
-            :nic_type    => config[:nic_type],
+            :nic_type    => config[:nic_type]
           }
         end
 
         def bridged_network_config(config)
           return {
-            :type => :dhcp
+            :type => :dhcp,
+            :use_dhcp_assigned_default_route => config[:use_dhcp_assigned_default_route]
           }
         end
       end