NETWORK, ROUTER DEVICE, ROUTE UPDATING SUPPRESSION METHOD USED FOR THE SAME, AND PROGRAM THEREOF

摘要

A router (1) introduces virtual interfaces (3-1 to 3-n) between network interfaces (2-1 to 2-n) and a routing processing unit (4). The virtual interfaces (3-1 to 3-n) have a function to conceal a state such as an instantaneous break of the network interfaces (2-1 to 2-n) from the routing processing unit (4). One virtual interface is provided for each of the network interfaces (2-1 to 2-n). In the virtual interfaces (3-1 to 3-n), an up state, a down state, and an instantaneous break state are available as the state for the link. In the case of the instantaneous break, the virtual interfaces (3-1 to 3-n) do not report modification of the link state to the routing processing unit (4).