Patent ID: 9369337
Filing Date: 2016-06-14
CPC Classification: H04L

Claim Text:
1. An operation method in a network system, comprising: starting to check states of ports of network equipments connected to n (n is a natural number equal to or greater than 1) terminals, respectively, according to a predetermined sequence; determining whether a fault has occurred in a current port of a network equipment among the ports of the network equipments using a signal output from the network equipment and transmitted to a terminal corresponding to the network equipment, the signal indicating an operation state of the network equipment, and generating a control signal based on the signal output from the network equipment and transmitted to the terminal corresponding to the network equipment when it is determined that a fault has occurred in the current port of the network equipment; when it is determined that a fault has occurred in the current port of the network equipment, checking whether there is a faulty port in which a fault has occurred among the other ports of the ports; when there is no faulty port among the other ports, switching from the current port to a backup port connected to a backup network equipment according to the control signal; when there is a faulty port among the other ports, comparing a priority of the current port and that of the faulty port; and when the current port has a higher priority than the faulty port, switching from the current port to the backup port according to the control signal, wherein the priority of the current port when it is determined that a fault has occurred in the current port is the same as the priority of the current port when it is determined that a fault has not occurred in the current port.