hobbit hierachy

Does hobbit work off of a parent/child relationship with hosts? Say i
have a router at a site and 20 or so devices off of that router. If
the router goes down will i get a page from all 20 something devices
or can i set it up to where if that happens that i only get a page
from the router. By the way Henrik, great job on bbgen/bb integration
with Hobbit. This is fairly easy to setup and comes with alot of pre- packaged things that is really nice. Great Job!!!!!

Josh