Node device for ring system, and system and method for constructing multiple spanning trees by using the same node device
AssigneeNEC Corporation
InventorYasuo Sato
Life of this patent
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Abstract
An object of the present invention is to provide a multiple spanning tree system in which a plurality of spanning trees are constructed in a ring system to effectively use a band of the ring system. A plurality of bridge protocol processing sections are provided in a node device to enable a plurality of bridge protocol processings to be performed in a transmission path connected to one node device. Thereby, a plurality of spanning trees can be constructed and a root bridge can be placed every each node device.
Claims14
A node device constituting a ring system, comprising a plurality of bridge protocol processing sections each of which independently performs bridge protocol processing.
A multiple spanning tree construction system for constructing multiple spanning trees in a ring system, comprising a plurality of node devices and a transmission path in ring form connecting said node devices to each other, said transmission path in ring form being divided into a plurality of logic topologies,
- wherein each of said node devices comprises a plurality of bridge protocol processing sections provided by being respectively related at least to the logic topologies, each of said bridge protocol processing sections independently performing bridge protocol processing, and
- multiple spanning trees are constructed in said ring system by execution of the bridge protocol processing with said plurality of bridge protocol processing sections.
A method of constructing multiple spanning trees in a ring system which is constituted by a plurality of node devices and a transmission path in ring form connecting the node devices to each other, and in which the transmission path in ring form is divided into a plurality of logic topologies,
- wherein each of said node devices comprises the steps of:
- independently performing a plurality of bridge protocol processings in correspondence with the logic topologies;
- and
- constructing multiple spanning trees in the ring system by executing the plurality of bridge protocol processings.
A method of controlling each of a plurality of node devices connected to each other by a transmission path in ring form in a ring system, the transmission path in ring form being divided into a plurality of logic topologies, comprising the steps of:
- independently performing a plurality of bridge protocol processings in correspondence with the logic topologies;
- and
- constructing multiple spanning trees in the transmission path in ring form by executing the plurality of bridge protocol processings.
A recording medium on which is stored a program for executing a method of controlling each of a plurality of node devices connected to each other by a transmission path in ring form in a ring system, the transmission path in ring form being divided into a plurality of logic topologies,
- wherein said program comprises the steps of:
- independently performing a plurality of bridge protocol processings in correspondence with the logic topologies;
- and
- constructing multiple spanning trees in the transmission path in ring form by executing the plurality of bridge protocol processings.
Dependencies are inferred from the claim text.