| 主权项 |
1. A first network switching device communicable to and from a second network switching device of which at least one of a device configuration and a device performance is different from the first network switching device, comprising:
a plurality of network interface units for transmitting and receiving a packet to and from a network; a packet forwarding unit for determining a forwarding destination of the packet received by any one of the plurality of network interface units, and forwarding the packet to any one of the plurality of network interface units; and a power state control unit for controlling a power state of at least one of the plurality of network interface units and the packet forwarding unit, wherein the at least one of the plurality of network interface units and the packet forwarding unit is a power state control subject which is controllable to be brought into a plurality of power states different in power consumption, whose forwarding performance increases as the power consumption increases and decreases as the power consumption decreases, wherein the power state control unit transmits, in order to change the power state of the second network switching device, a forwarding performance notification including the forwarding performance of a power state control subject after the change to the second network switching device, wherein the first network switching device is configured to be redundant with the second network switching device, wherein the first network switching device further comprises:
a redundancy management table for managing a relationship in the redundancy; anda protocol control unit for managing a redundancy protocol used for configuring the network to be redundant, wherein the protocol control unit refers to the redundancy management table, and determines whether to operate the first network switching device as a device actually to forward the packet, or as a device not to forward the packet, and wherein the power state control unit transmits, in a case where the first network switching device is determined to operate as the device actually to forward the packet, and the power state of at least one of the power state control subjects is changed, in order to change the power state of the second network switching device operating as the device not to forward the packet, the forwarding performance notification including the forwarding performance of the power state control subject after the change to the second network switching device, and changes, in a case where the first network switching device is determined to operate as the device not to forward the packet, and receives the forwarding performance notification from the second network switching device operating as the device actually to forward the packet, the power state of the power state control subject so as to satisfy the forwarding performance included in the received forwarding performance notification. |
