Disable layer 3 topology discovery NPM 10.2

Is there a way to disable the layer 3 topology discovery on NPM 10.2. Once I do a discovery when I use the connectnow feature on the network atlas it shows both layer 2 and 3 connections. I manually went to each switch on the list resources and unchecked the layer 3 topology and then when I used the connect now feature it made only the layer 2 connections. Is the a way to disable the layer 3 and then add it when necessary?