METHOD, APPARATUS, AND SYSTEM OF TRANSFERRING PACKET

PROBLEM TO BE SOLVED: To reduce electric power of a network when a traffic amount circulating the network is small. SOLUTION: An edge router measures a traffic amount inputted to a network 100 to inform a management server 130 of measurement results. When the management server 130 determines that the informed traffic amount is "smaller" than the capacity of a core router 120, it directs a core router 110 to move to a power-saving mode. The core router 110 informs the edge router of transition to the power saving mode. The edge router updates a routing table so that a packet to the core router 110 is bypassed to a core router 120. The core router 110 shifts to the power saving mode in which no packet is transferred to achieve electrical power reduction. COPYRIGHT: (C)2010,JPO&INPIT