Wireless ad-hoc network is self-organizing, rapidly deployable and without fixed infrastructure. The hosts in ad-hoc network communicate with each other over a wireless channel without any centralized control. The basic problem is to obtain a distributed routing scheme so that any mobile host can transmit/receive data from any other host in the network. As we know, in terms of the way in which nodes obtain information, routing protocols for ad-hoc network have been classified as table-driven and on-demand. In table-driven routing protocols, the interactive mode of control message has great effect on network performance. In this paper, a novel concept that "different interactive mode for different scale of network" is presented. The network performance is optimized by using appropriate periodical or non-periodical interactive mode based on the scale of the network. Different interactive mode is given for different scale of the network by the theoretic analyzing and algorithm simulating. The simulation result is of great practicability.