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Abstract

A multilayer ATM communication equipment includes a port VPI-VCI table, an ATM switch, an MAC frame forming section, a flow VPI-VCI table, a flow identification section, a port MAC address table, and an MAC switch section. The port VPI-VCI table stores transfer route information and input/output port information. The ATM switch transfers the ATM cell from the output port corresponding to the output port information on the basis of the transfer route information and the input port number. The MAC frame forming section forms an MAC frame on the basis of the transfer route information. The flow VPI-VCI table stores flow information and transfer output information. The flow identification section transfers the MAC frame on the basis of the transfer output information. The port MAC address table stores the destination information of the MAC frame and transfer output information. When transfer output information is stored in the port MAC address table, the MAC switch section transfers the MAC frame on the basis of the transfer output information. Otherwise, the MAC switch section assigns a new input port, notifies a transmission-side switch of the flow information and the input port, sets a shortcut path, and transfers the MAC frame from the notified output port.

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First Claim