Zone Routing Protocol: How does it perform the other way round?

In order to have the benefits offered by Proactive Routing and Reactive Routing while reducing the undesirable effects of both respectively, Hybrid Routing is suggested to be used in ad-hoc and Mobile Ad-hoc Networks (MANETs). One such hybrid routing protocol is the Zone Routing Protocol (ZRP). ZRP attempts to reduce the initial route discovery delay in case of reactive routing, and the control traffic in case of proactive routing by dividing the network into zones. Within each zone proactive routing is used while between zones, reactive routing is used. In this paper we evaluate the performance of ZRP when instead of proactive routing, reactive routing is used within zones and proactive routing is used between zones. Apparently this approach might indicate that the whole purpose of using hybrid routing is defeated. However, we take into account the parameters of throughput and delay while evaluating the performance. We also compare our reverse approach with the conventional ZRP to check the effect on routing traffic.