Patent ID: 7916737
Filing Date: 2011-03-29
Classification: H04L

Abstract:
1. A network system comprising: a first, a second, and a third relaying devices that relay packets; wherein the first relaying device includes N (the number N is an integer at least 2) ports configured to connect to lines, the N ports including a first port and a second port, the first port being connected to a line from the second relaying device, the second port being connected to a line from the third relaying device, wherein among the N ports, J (the number J is an integer at least 2 and at most N) candidate ports are capable of communication with a specific common destination, the J candidate ports including the first port and the second port, wherein the first relaying device further comprises: the third relaying device comprises a power mode controller that controls a power mode of the third relaying device, the power mode controller selects the power mode from among a plurality of power modes including a first power mode and a second power mode, a power consumption of the third relaying device being relatively small in the first power mode, the power consumption being relatively large in the second power mode, the packet processor has a first selecting mode and a second selecting mode for selecting the output port, the first selecting mode relating to a case where the power mode of the third relaying device is the first power mode, the second selecting mode relating to a case where the power mode of the third relaying device is the second power mode, wherein in the first selecting mode, the packet processor: in the second selecting mode, the packet processor: