@isratrade I understand how it works, but I don't understand why it works this way. A > B > C was simplest example where I wanted to show that we 'inherit' in both directions. So when I select B1 (Brno) I will see also all subnets assigned to A (Czech Republic) and C1 (Building 1) and C2 (Building 2). I'm confused, why should I see all of these? I think I shouldn't touch subnet from A (Czech Republic) when I'm in B1 (Brno) since I don't know what impact will it have on others B2 (e.g. Prague). Maybe I just don't see some usecases but 'inheriting' both directions seems strange to me.