Routing control system for L3VPN service network

摘要

A routing control system comprising a system controller (50) and master and slave routing servers (40-1, 40-2), wherein the master routing server (40-1) includes a plurality of logical controllers (49), each of which performs routing control for each of the user networks (NW-a, NW-b, NW-c), the system controller (50) monitors a load state of the master routing server (40-1) and migrates at least one of the plurality of logical controllers (49) from the master routing server (40-1) to the slave routing server (40-2) when the load state has satisfied a predetermined condition, so that the slave routing server (40-2) inherits routing control for a particular user network (NW-a; NW-b; NW-c) associated with the migrated logical controller (49).