-The purpose of this entity is to define a route between two ASes.
-This is mainly useful when you're in the \ref pf_routing_model_full "Full routing model".
+The purpose of this entity is to define a route between two
+NetZones. Recall that all zones form a tree, so to connect two
+sibiling zones, you must give such a zoneRoute specifying the source
+and destination zones, along with the gateway in each zone (ie, the
+point to reach within that zone to reach the netzone), and the list of
+links in the ancestor zone to go from one zone to another.
+
+So, to go from an host \c src_host that is within zone \c src, to an
+host \c dst_host that is within \c dst, you need to:
+
+ - move within zone \c src, from \c src_host to the specified \c gw_src;
+ - traverse all links specified by the zoneRoute (they are supposed to be within the common ancestor);
+ - move within zone \c dst, from \c gw_dst to \c dst_host.