Wide area load sharing control system

A wide area load sharing control system comprising:

• statistic information gathering means for obtaining from respective nodes, as statistic information, a traffic state of links connected to said respective nodes in a network;
• route determining means determining, based on the obtained statistic information, at least one route for extending a plurality of paths between ingress edge nodes and egress edge nodes that correspond to a traffic engineering section in the network;
• and
• load sharing determining means for determining, based on the obtained statistic information, a distribution ratio at which a traffic should be distributed to respective paths on the determined route,
• wherein said statistic information gathering means, said route determining means and said load sharing determining means are switched over to between said ingress edge nodes and a network control device concentratedly controlling said respective nodes, mutually.

A wide area load sharing control method executed by one of a control device and ingress edge nodes being a computer respectively, the method comprising:

• obtaining from respective nodes, as statistic information, a traffic state of links connected to said respective nodes in a network;
• determining, based on the obtained statistic information, at least one route for extending a plurality of paths between ingress edge nodes and egress edge nodes that correspond to a traffic engineering section in the network;
• determining, based on the obtained statistic information, a distribution ratio at which a traffic should be distributed to respective paths on the determined route;
• and
• switching over processing means of said obtaining and said determinings to between said ingress edge nodes and a said control device concentratedly controlling said respective nodes, mutually.