Network system and node redundancy method of network system
AssigneeFujitsu Limited
InventorAkio Endo
Life of this patent
Estimating the term…
Abstract
In a star type network which distributes loads by a plurality of multi-point switches MP-SWs, the information on the number of normal ports for each identifier of the logical connection is sent from an MP-SW to a slave SW, and the slave SW selects an MP-SW having a higher number of normal ports as the transfer destination of the data frame for each identifier. This node redundancy method can switch lines easily at high-speed when a link down occurs.
Claims12
A network system comprising:
- a plurality of master nodes performing multi-point connection of logical connections;
- and
- a plurality of slave nodes under said plurality of master nodes,
- wherein each master node notifies a number of normal ports for each logical connection to each slave node, and each slave node selects a traffic transfer destination master node out of said plurality of master nodes for each logical connection, based on the comparison of said number of normal ports received from each master node.
A node redundancy method for a network system which comprises a plurality of master nodes performing multi-point connection of logical connections and a plurality of slave nodes under said plurality of master nodes, the node redundancy method comprising:
- a notification step in which each master node notifies a number of normal ports for each logical connection to each slave node;
- and
- a selection step in which each slave node selects a traffic transfer destination master node out of said plurality of master nodes for each logical connection, based on the comparison of said number of normal ports received from each master node.
A switch for switching traffic for each logical connection accommodated in a plurality of ports respectively, comprising:
- a management unit for managing information on a number of normal ports for each logical connection, and
- a transmission unit for transmitting the information on said number of normal ports to a plurality of slave switches.
A switch for switching traffic for each logical connection accommodated in a plurality of ports respectively, comprising:
- a receiving unit for receiving information on a number of normal ports for each logical connection in each master switch, that is sent from a plurality of master switches respectively;
- and
- a selection unit for selecting a traffic transfer destination master switch for each logical connection, based on the comparison of the number of normal ports of each master switch received by said receiving unit, wherein
- traffic is switched to the port of said selected master switch for each logical connection.
Dependencies are inferred from the claim text.