This paper proposes a dynamic traffic management (DTM) mechanism which addresses the problem of cost-optimal distribution of inevitable overlay inter-domain traffic on multiple links. The paper extends the DTM mechanism to the 95th percentile charging rule enabling dynamic overlay traffic management and adaptation to constantly changing traffic patterns to meet cost optimization goals. The mechanism allows for the management of traffic generated by overlay applications such as content delivery platforms, online storage systems, or P2P. We discuss simulation results performed for the DTM in case of two inter-domain links charged according to the 95th percentile rule.