Аннотация:The paper discusses approaches to organizing the service “Bandwidth on Demand” for data transfer betweenData Centers (DC). In this paper wepresentan analysis of the routes' aggregation protocols, considerroutingthat uses aggregation and constructa mathematical model of the data flow distribution amonggeneratedroutes. Thismodel makes possible to determine the existence of a flow load distribution for the case of a single flowand some particular cases of the solution absencein the multiflow case.