In a Mobile Ad Hoc Network (MANET), the routing process presents a solution that allows two nodes to communicate even if they are separated and one is out of reach from each other. However, this process is among the most complicated tasks to be implemented. Indeed, in addition to several constraints usually associated with limited resources nodes, the routing protocols to confront other problems mainly from the dynamic network topology, the absence of a network infrastructure, centralized administration can manage all nodes and significant property is that the entire network itself depends on individual behavior of each node. As part of a proactive protocol such as OLSR (Optimized Link State Routing: Routing State Links Optimized), this nature can be drawn to a set of attacks of selshness and greatly impact network performance and especially the connectivity between each node and its MPRs (MultiPoint Relays: Relays MultiPoint).