Method and system for calculating routing convergence ability

The invention discloses a method and system for calculating the routing convergence ability. The method comprises the steps of setting the number of topological nodes, the number of routing subnets and the quantitative proportion of nodes at each layer, defining a link relation of each node and subnet routing distribution rules, and outputting a layered topology model comprising a core layer, a tandem layer and an edge layer; injecting mixed service flows with the mixed message length into evaluated router equipment, wherein the sum of the sum-rate of the service flows is Rs, and the service flows flow to a topology network with the layered topology model through the evaluated router equipment; responding to an interruption instruction, and interrupting connection with a preferred routing path of the topology network; and calculating the routing convergence time according to the total number Ps of sent messages, the total number Pr of received messages and the sum-rate Rs of the service flows. The method and the system disclosed by the invention enhance the authenticity of a test, and realize effective verification for the present network topology.