Patent ID: 7532634

Claim:
A resilient packet ring (RPR) device, which is connected to one or more rings to constitute an RPR network, comprising: a storage unit for registering a correspondence between RPR device addresses, each indicating an RPR device connected to said one or more rings and user device addresses, each indicating a user device accommodated in the RPR device; a transfer control unit receiving data, which is addressed to a predetermined user device, from a user device accommodated in the RPR device itself, and when an RPR device address of an RPR device accommodating the predetermined user device is registered in the storage unit, adding an RPR header, in which the RPR device address is set as a destination RPR device address, to the data; a unit transmitting the data with the RPR header to the RPR network; a receiving unit receiving the data with the RPR header from the RPR network; and an address learning unit receiving at least a transmission source address of the data with the RPR header and a transmission source RPR device address set for the RPR header from the receiving unit, and when the transmission source address is not registered in the storage unit, registering correspondence between the transmission source address and the transmission source RPR device address to the storage unit.