Patent ID: 9509398
Filing Date: 2016-11-29
CPC Classification: H04B,H04L

Claim Text:
1. A relay method executed by a plurality of computers included in a ring network, the relay method comprising: transmitting, by a first computer among the plurality of computers, a first control frame in which information of the first computer is stored, through a first port different from a second port where a communication failure is detected; receiving, by a second computer among the plurality of computers, the first control frame through a third port; when the communication failure does not occur at a side of a fourth port of the second computer, the fourth port being different from the third port, storing information of the second computer in the first control frame, and transmitting the first control frame through the fourth port; when the communication failure occurs at the side of the fourth port, determining, by the second computer, whether a communication path of a data frame flowing into the ring network includes a path where the communication failure occurred for every virtual local area network (VLAN) based on the first control frame; and switching, by the second computer, the communication path to another communication path when determining that the communication path includes the path where the communication failure occurred.