Patent application number | Description | Published |
20090063679 | NETWORK RELAY APPARATUS - A network relay apparatus which conducts data transfer by using a plurality of network LSIS includes a transfer engine unit having at least two network LSIs and a central control unit which controls the operation state of the network relay apparatus. The transfer engine unit includes the network LSIs capable of changing over at least one of a clock and an operation which differ every function block, a load judgment unit for judging a load laid upon each of function blocks in the network LSI, and a frequency voltage control unit for individually changing over at least one of the clock and operation voltage supplied to each function block on the basis of the load judged by the load judgment unit. | 03-05-2009 |
20090103554 | DATA TRANSFER DEVICE FOR RING PROTOCOL HIGH SPEED SWITCHING AND METHOD FOR THE SAME - The present invention provides a data transfer device. This data transfer device comprises a number n (where n is an integer equal to 2 or greater) of transfer resources functioning as nodes of ring networks and connection lines connecting a number m (where m is an integer equal to 2 or greater) of ring networks and the number n of transfer resources. The connection lines are configured to be capable to connect at least some of the m ring networks and at least some of the n transfer resources. A controller controls transfer resource specified among at least some of the transfer resources to manage at least some of m number of ring networks. | 04-23-2009 |
20090109985 | Packet forwarding device - A power-saving packet forwarding device realizing electric power that accords to the number of lines in which communication is performed and a traffic volume inputted from the lines. A header processing unit with which the packet forwarding device is equipped has a plurality of packet processing circuits for performing a packet processing. A line number decision circuit monitors the number of lines in which communication is performed and a traffic volume inputted from the line, and decides presence or absence of an operation of a packet processing circuit. Based on this decision result, a power supply and a clock of the packet processing circuit that does not need to operate are interrupted, and accordingly power saving of the packet forwarding device is realized. | 04-30-2009 |
20090141641 | COMMUNICATION DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION FAULT DETECTION METHOD - The communication device has a frame transfer unit that executes frame transfer via the first communication link and the second communication link, a link confirmation frame sending unit, and a return link confirmation frame monitoring unit. The link confirmation frame sending unit causes the frame transfer processing unit to send a link confirmation frame for use in confirming a normal link status via the first communication link from the communication device to the counterpart communication device. The return link confirmation frame monitoring unit performs fault detection of the first and second communication links by monitoring a return link confirmation frame which is to be returned from the counterpart communication device to the communication device via the second communication link when the counterpart communication device receives the link confirmation frame via the first communication link. | 06-04-2009 |
20090190600 | RELAYING DEVICE, NETWORK SYSTEM, AND NETWORK SYSTEM CONTROLLING METHOD - The first relaying device uses the first port (the second relaying device) for the first priority in the first selecting mode, and uses a port other than the second port (the third relaying device) for the second priority. The first relaying device uses the first port for the first priority and uses the second port for the second priority, in the second selecting mode. In a case where the selecting mode is the first selecting mode, the power mode of the third relaying device is the first power mode wherein the power consumption is relatively small. In a case where the selecting mode is the second selecting mode, the power mode of the third relaying device is the second power mode wherein the power consumption is relatively high. | 07-30-2009 |
20090304008 | NETWORK RELAY DEVICE AND NETWORK RELAY METHOD - A network relay device for relaying communication for a regular terminal via a port includes an acquiring module, a regular terminal information storing module, and a determination process module. The acquiring module acquires a regular layer 2 address, a regular layer 3 address, regular VLAN information representing a VLAN assigned to the regular terminal, and regular port information representing a port to which the regular terminal is connected. The regular terminal information storing module stores regular terminal information representing a combination of the acquired regular layer 2 address, the regular layer 3 address, the regular VLAN information, and the regular port information. The determination process module determines whether the combination of source layer 2 address, source layer 3 address, assigned VLAN, and reception port of target frame data received via the port is stored as the regular terminal information. | 12-10-2009 |
20100103933 | NETWORK RELAY APPARATUS - The network relay apparatus includes: a plurality of distributed processing units configured to receive and send a packet from and to an external device; an integrated processing unit connected with the plurality of distributed processing units; and a mode selector configured to change over a processing mode of the network relay apparatus between a distributed processing mode and an integrated processing mode, based on at least either one of a load applied to the network relay apparatus and a packet type determined according to header information of the received packet. | 04-29-2010 |
20100229016 | ASSESSING CONDITIONS OF POWER CONSUMPTION IN COMPUTER NETWORK - A network system forms a computer network, and includes: a collecting unit; a calculating unit; and a display unit. The collecting unit collects power consumption information from a connecting device. The power consumption information shows power consumption of the connecting device. The calculating unit calculates power consumption of the computer network based on the collected power consumption information. The calculated power consumption is itemized into constituent units based on a configuration of the computer network. The display unit displays the calculated power consumption. | 09-09-2010 |
20110002337 | NETWORK RELAY APPARATUS - Network relay arrangements including: multiple ports; MAC address storage; flooding indication storage; plane number management storage; table manager; and frame processor. The table manager: utilizes the plane number management storage to specify current identification information being currently used and next identification information to be used next, with regard to a preset element of the key item for identifying a target of deletion of the information of correlating the transmit port to the MAC address from the MAC address storage; sets the requirement of the flooding operation in registry of a certain information group in the flooding indication storage having the preset element and being correlated to the current identification information; and sets the non-requirement of the flooding operation in registry of a certain information group in the flooding indication storage having the preset element and being correlated to the next identification information. | 01-06-2011 |
20110019679 | NETWORK RELAY APPARATUS - The network relay apparatus is provided. The network relay apparatus includes: multiple ports, each being provided to send and receive a frame to and from one of multiple external devices; and a frame processor configured to perform flooding, in order to relay a received frame that is received via one of the multiple ports as a receiving port, with a preset flooding target according to an attribute of a transmit port that sends the received frame. | 01-27-2011 |
20110058564 | NETWORK RELAY DEVICE AND MEMORY CONTROL METHOD - A network relay device includes a packet buffer for temporarily storing a received packet, and a packet buffer control section for changing an effective buffer number depending on the received amount of packet. When a traffic amount is small, the packet buffer control section reduces the power consumption by stopping the feeding of power or the supply of clock to a part of the packet buffers. The network relay device further includes plural table memories storing a table for deciding the transfer destination of packet, and a table memory control section for changing an effective table number according to a required number of table entries. When the required table entry number is small, the table memory control section reduces the power consumption by stopping the feeding of power or the supply of clock to a part of the table memories. | 03-10-2011 |
20110107127 | NETWORK RELAY APPARATUS - A network relay apparatus which conducts data transfer by using a plurality of network LSIs includes a transfer engine unit having at least two network LSIs and a central control unit which controls the operation state of the network relay apparatus. The transfer engine unit includes the network LSIs capable of changing over at least one of a clock and an operation which differ every function block, a load judgment unit for judging a load laid upon each of function blocks in the network LSI, and a frequency voltage control unit for individually changing over at least one of the clock and operation voltage supplied to each function block on the basis of the load judged by the load judgment unit. | 05-05-2011 |
20110228792 | NETWORK SWITCHING DEVICE - Network switching arrangements including: setting an operation mode of a target switching block to a operation mode that is different from an operation mode of a first switching block while the first switching block is handling a switching process, the target switching block being one switching block selected from second switching blocks; performing a switchover process including starting the switching process using the target switching block instead of the first switching block, after completion of setting the operation mode of the target switching block; and copying the switching information held by the first switching block to the target switching block, prior to starting the switching process using the target switching block, after completion of setting the operation mode of the target switching block. | 09-22-2011 |
20110255534 | DEVICE AND METHOD FOR RELAYING PACKETS - A system having a plurality of network devices, each including: an interface module including a plurality of physical ports to transmit and receive packets; a computing module configured to execute a computing process with a computational expression using seed information, the seed information including at least one of destination information and source information associated with a received packet; a destination search module configured to, based on the result of the computation, select a physical port for transmission of the received packet from a plurality of candidate ports among the plurality of physical ports; and a modifying module configured to modify the computational expression, wherein the plurality of network devices include preceding-stage and subsequent-stage network devices, the subsequent-stage network device being directly coupled to the preceding-stage network device with physical wiring, and wherein the subsequent-stage and preceding-stage network devices are configured to use different expressions in the computing process. | 10-20-2011 |
20120008623 | Packet forwarding device - A power-saving packet forwarding device realizing electric power that accords to the number of lines in which communication is performed and a traffic volume inputted from the lines. A header processing unit with which the packet forwarding device is equipped has a plurality of packet processing circuits for performing a packet processing. A line number decision circuit monitors the number of lines in which communication is performed and a traffic volume inputted from the line, and decides presence or absence of an operation of a packet processing circuit. Based on this decision result, a power supply and a clock of the packet processing circuit that does not need to operate are interrupted, and accordingly power saving of the packet forwarding device is realized. | 01-12-2012 |
20120026894 | COMMUNICATION DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION FAULT DETECTION METHOD - The communication device has a frame transfer unit that executes frame transfer via the first communication link and the second communication link, a link confirmation frame sending unit, and a return link confirmation frame monitoring unit. The link confirmation frame sending unit causes the frame transfer processing unit to send a link confirmation frame for use in confirming a normal link status via the first communication link from the communication device to the counterpart communication device. The return link confirmation frame monitoring unit performs fault detection of the first and second communication links by monitoring a return link confirmation frame which is to be returned from the counterpart communication device to the communication device via the second communication link when the counterpart communication device receives the link confirmation frame via the first communication link. | 02-02-2012 |
20120039184 | NETWORK SYSTEM, LAYER 2 SWITCH, AND METHOD OF DETECTING OCCURRENCE OF A FAULT IN A NETWORK - A network system comprises a first communication device being set up with a first address; and a second communication device connected with the first communication device via a network and being set up with a second address, wherein the first communication device includes a monitor frame transmitter configured to generate a monitor frame including the second address as a destination address and the first address as a source address, and to output the generated monitor frame to the network; and a monitoring-response frame monitor configured to monitor reception of a monitoring-response frame sent back from the second communication device, wherein the second communication device includes: a monitoring-response frame transmitter configured to, in response to reception of the monitor frame, generate the monitoring-response frame by exchanging the destination address in the received monitor frame for a source address and the source address in the received monitor frame for a destination address, and output the generated monitoring-response frame to the network. | 02-16-2012 |
20120263044 | RELAY DEVICE, NETWORK SYSTEM, AND NETWORK FAILURE DETECTION METHOD - A relay device comprises: a packet type determining unit that determines: whether a received packet is a monitoring packet, sent by a first communication device that monitors a network connection state, set the first communication device as the sending source, and set a second communication device that is monitored as the sending destination; and whether the received packet is a monitoring response packet sent as the response to the monitoring packet with sending source address and destination address of monitoring packet interchanged; a transfer processing unit that receives the monitoring packet and transfers it to a destination; a monitoring unit that monitors receipt of the monitoring response packet within a specified period; and a failure notification packet sending unit that generates a failure notification packet and sends it to a specified destination, when the monitoring response packet is not received within the specified period. | 10-18-2012 |
20120307823 | PACKET TRANSFERRING NODE - In a conventional “distributed” integrated network node architecture, specific judgment processes cannot be executed in any routing and transferring unit. The routing and transferring unit is required to share judgment process related information with an enhanced processing unit or other routing and transferring units. Thus, when using enhanced processing units, manufacturing costs increase, while processing speed decreases when routing and transferring units cooperate. If any flow is disposed during a transfer from a packet transferring unit in a routing and transferring unit to a processing unit, the packet is disposed regardless of packet priority. In the present invention, a packet related to a specific judgment process is always transmitted to a specific routing and transferring unit from a line interface unit. If an inputted flow is over the transferring capacity, the line interface unit analyzes the packet header and determines the type, transport priority, and disposal priority of the packet. | 12-06-2012 |
20120311169 | NETWORK RELAY APPARATUS - A network relay apparatus which conducts data transfer by using a plurality of network LSIs includes a transfer engine unit having at least two network LSIs and a central control unit which controls the operation state of the network relay apparatus. The transfer engine unit includes the network LSIs capable of changing over at least one of a clock and an operation which differ every function block, a load judgment unit for judging a load laid upon each of function blocks in the network LSI, and a frequency voltage control unit for individually changing over at least one of the clock and operation voltage supplied to each function block on the basis of the load judged by the load judgment unit. | 12-06-2012 |
20130103831 | ASSESSING CONDITIONS OF POWER CONSUMPTION IN COMPUTER NETWORK - A display apparatus including: a collecting unit that collects power consumption information, wherein the power consumption information shows power consumption of a connecting device, and the connecting device interconnects a plurality of communication paths in a computer network; and a display unit that displays power consumption of the computer network, based on the power consumption information and constituent units based on a virtual network which is configured virtually on the computer network. | 04-25-2013 |
20140003280 | NETWORK SWITCHING DEVICE | 01-02-2014 |