Abstract: Based on the layered graph, a delay and bandwidth constrained intelligent static traffic grooming scheme is proposed in IP over DWDM optical Internet. With the idea of orthogonal design evolution, ecological-niche population and the hybridization are introduced into the scheme to maximize the comprehensive user traffic request delay satisfaction degree and minimize the network cost simultaneously. The scheme proposed was simulated with VC++6.0 and compared with certain existing traffic grooming scheme. Several performance indices of the scheme were evaluated, such as the comprehensive measure and blockage rate of traffic grooming request, over some actual network topologies. Simulation results showed that the proposed scheme is both feasible and effective with better performance.