[Nav-users] SW vs GSW

Hello, Could someone explain to me how NAV interprets SW and GSW categories. It is not making sense to me. For example, a Cisco Catalyst 6513 has three cards: 1 for switching and 3 for MSFC routing. So I suppose that the first one should be set to SW and the MSFCs to GW. Then, the Catalyst 4006 switches that we use, NAV did not get data when I entered them as SW. It gets all the data when I change them to GSW. However, these 4006 are only doing switching on layer 2. SImilarly for Catalyst 3500 series switches.

I could not find anything in the NAV wiki, any information will be appreciated. Thanks!