How to set up a hierarchy of switches, routers in icinga2 director?

Question

D-Link

There is a network. In it, two routers (R1 and R2) are connected by a separate vlan for load balancing. The ports of these routers are plugged into the switches (s1 and s2), more switches are connected from these switches (s1.1 s1.2 s2.1 s2.2). How to set it up so that, for example, if the switch s1 falls, the icing does not bring down notifications from s.1.1 and s1.2? Can this be done at all? I'm sorry if this is a stupid question and thanks for your attention and answers!