Abstract: The communication apparatus includes: a first circuit board unit including, on a front surface of the communication apparatus, a port for transmitting and receiving data to and from the network; a second circuit board unit including a plurality of first connectors connected to at least one of the first circuit board units, a second connector being capable of accommodating at least a bandwidth accommodated by the plurality of first circuit board units, and being connected, via a cable, to the other communication apparatus of a standby system; and a cross bar switch for selectively outputting data to the first connectors or the second connector as a data output destination, and a ventilation control unit for controlling a flow of air flowing between each of the first circuit board unit and the second circuit board unit, and outside of the communication apparatus.

Abstract: A virtual tunnel endpoint that makes a communication of a specific tenant is separated from virtual tunnel endpoints that make communications of the other tenants. A forwarding route from the virtual tunnel endpoint that makes a communication of the specific tenant is separated from a forwarding route from the virtual tunnel endpoints that make communications of the other tenants. Accordingly, a communication of the specific tenant is forwarded with priority.

Abstract: A communication device includes a transfer control unit and a function execution module having a physical processor. The communication device migrates a first process execution unit operated by the function execution module and a management memory to a function execution module of a migration destination. The function execution module notifies the function execution module of the migration destination of information to specify a program allocated to a second process execution unit and information regarding allocation of the physical processor. The function execution module of the migration destination downloads a program file to start the second process execution unit, operates a program of a new second process execution unit by the function execution module of the migration destination, discards the temporary data on the memory of the second process execution unit, and migrates the second process execution unit to the function execution module of the migration destination.

Abstract: A communication apparatus comprises a CAM, an action determination unit, and a CAM diagnosis unit. The CAM includes, a plurality of entries each storing therein at least a portion of header information of frame, and a search circuit for each entry configured to determine whether or not a search key matches data stored at the entry. The search key is correlated with information indicating whether or not an entry matching the search key and an expected value of a search result including identification information of an entry matching the search key. The CAM diagnosis unit causes the CAM to search for an entry matching the search key. The CAM diagnosis unit diagnoses a failure occurring at the search circuit of an entry to be the test object when the result of the search does not match the expected value of a search result correlated to the search key.

Abstract: It is intended to reduce a power consumption without degrading a communication quality of a packet transfer device. One or more of a receiver, a switch unit, and a transmitter include a QoS control circuit for applying QoS control to received packets. There is provided a power saving operation mode that enables power saving operation by changing a grain size of the QoS control according to a flow rate of the packets, and controlling whether or not to supply an electric power to the QoS control circuit or a part of the QoS control circuit, according to the flow rate of the packets.

Abstract: There is a need for a network interface supporting various line speeds to have a smaller size and provide more flexible accommodation than the related art. In the present invention, provided is a communication device including a transfer processing unit which has four connectors capable of coupling with network interface units to be accommodated in one slot, and a packet processing circuit configured to process a packet input from the network interface via any one of the connectors and output the packet toward the network interface unit to be coupled with the connector, and a path control unit configured to manage a path between the packet processing circuit and the connector.

Abstract: It is provided a relay apparatus, comprising: a plurality of ports coupled to a network; a Layer 2 processing module for relaying, via the network, a frame comprising a Layer 2 header and a Layer 2 data segment, the Layer 2 data segment comprising a Layer 3 header and a Layer 3 data segment; and an output unit, wherein the module updates a value of a particular field of the Layer 3 header, uses a first characteristic value related to the Layer 3 header, which is stored in a given field, and a pre-update value and post-update value of the particular field to compute a second characteristic value related to the Layer 3 header, and updates the value of the given field from the first characteristic value to the second characteristic value, and wherein the output unit outputs the updated frame as an output destination of the updated frame.

Abstract: A packet relay device has a packet receiving unit, a switch, a packet sending unit, an associative memory, and a packet search unit. The packet search unit has action registers which hold information specifying an action to be executed, holds address range information including consecutive address ranges of the associative memory and the action registers in association with each other, and registers a plurality of flow entries at a plurality of addresses in the same address range. The flow entries have conditions identifying the flows associated with the same action. The device inputs header information of the packets into the associative memory, determines the action to be executed in accordance with information read out from the action register corresponding to the address range including an address output from the associative memory, and executes the determined action.

Abstract: 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.

Abstract: To improve fault tolerance of a ring network, provided is a data transfer device system belonging to a ring network system. The data transfer device system includes a plurality of data transfer devices; the plurality of data transfer devices including a first data transfer device and a second data transfer device connected with the first data transfer device; the first data transfer device having a first ring port; and the second data transfer device having a second ring port. The first data transfer device controls whether to permit the first ring port and the second ring port to transfer data based on a state of the network system, an attribute of the first data transfer device in the data transfer device system, and an attribute of the data transfer device system in the network system.

Abstract: A network relay system includes a plurality of communication devices. Each of the communication devices includes a data plane that transfers an input packet according to routing information, and a control plane having a processing unit that learns the routing information, and a control system repeater. The data planes of the respective communication devices can realize a non-blocking communication therebetween. Also, the control system repeater of an operational system receives the routing information from the processing unit, sets the routing information for the data plane of the subject communication device, and transmits the routing information to the control system repeater of the other communication device. The control system repeater of a standby system receives the routing information, and sets the routing information for the data plane of the subject communication device.

Abstract: A connector housing apparatus includes a main body section that has a plurality of connectors confronting a plurality of external connectors of an external housing and a moving guide section that guides movement of the main body section toward the external housing. The moving guide section has a latching section that latches the moving guide section on the external housing. The main body section is connected to the moving guide section so as to be movable in a fitting direction of the plurality of connectors. The latching section latches the moving guide section on a position at which the plurality of connectors are fitted to the plurality of external connectors. The main body section moves along the moving guide section in the fitting direction of the plurality of connectors, and thereby the plurality of connectors are fitted to the plurality of external connectors.

Abstract: 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.

Abstract: A system manager sets a port connected to a specific device (for example, a router device) among a plurality of ports of a switch device as a reliable port. If a packet is received in the reliable port, the switch device manages an IP address and a MAC address of the router device by a reliable port information table. When a packet is received from a port not set as the reliable port, the switch device refers to the reliable port information table. At this time, when the received packet is an address resolution packet having impersonated a router device, the switch device discards the packet without transmitting the packet, thereby preventing a cyber attack on a terminal.

Abstract: The communication apparatus includes: a first circuit board unit including, on a front surface of the communication apparatus, a port for transmitting and receiving data to and from the network; a second circuit board unit including a plurality of first connectors connected to at least one of the first circuit board units, a second connector being capable of accommodating at least a bandwidth accommodated by the plurality of first circuit board units, and being connected, via a cable, to the other communication apparatus of a standby system; and a cross bar switch for selectively outputting data to the first connectors or the second connector as a data output destination, and a ventilation control unit for controlling a flow of air flowing between each of the first circuit board unit and the second circuit board unit, and outside of the communication apparatus.

Abstract: A first communication apparatus to be coupled to a second communication apparatus and a third communication apparatus via a ring network, including: a first port to coupled to the ring network; and a second port to coupled to the ring network; wherein the first port and the second port is set to receive a control frame from the second communication apparatus and the third communication apparatus, and either the first port or the second port is set to be disabled to relay a user frame.

Abstract: A connector housing apparatus includes a main body section that has a plurality of connectors confronting a plurality of external connectors of an external housing and a moving guide section that guides movement of the main body section toward the external housing. The moving guide section has a latching section that latches the moving guide section on the external housing. The main body section is connected to the moving guide section so as to be movable in a fitting direction of the plurality of connectors. The latching section latches the moving guide section on a position at which the plurality of connectors are fitted to the plurality of external connectors. The main body section moves along the moving guide section in the fitting direction of the plurality of connectors, and thereby the plurality of connectors are fitted to the plurality of external connectors.

Abstract: A transfer apparatus includes a CPU, a memory, a recovery control unit, a non-volatile memory coupled to the recovery control unit, a transfer engine, and a volatile memory, wherein the volatile memory stores a first transfer information base, wherein the non-volatile memory stores a second transfer information base, and the recovery control unit is configured to update the second transfer information base in a case of receiving an instruction to update the second transfer information base, transmit an instruction to update the first transfer information base to the transfer engine, check the consistency of the first transfer information base and the second transfer information base in a case where the transfer apparatus is rebooted, and recover the first transfer information base by using the second transfer information base in a case where the first transfer information base and the second transfer information base are consistent.

Abstract: A Provider Edge PE3 replicates a received packet and relays these to virtual circuits VC1, VC2 respectively, and Provider Edges PE2, PE2 respectively receive the packets from the virtual circuits VC1, VC2, whereupon the Provider Edges PE2, PE2, on the basis of an agreement between them, decide to handle the received packets such that one of the first edges relays the packet to a Customer Edge CE1 for forwarding to a Host A, while the other edge discards the packet without relaying it to the Customer Edge CE1.

Abstract: Distribution of a certificate and a private key via a network includes a certificate/private key storage unit by which a certificate and a private key prepared for distribution to one or more devices are stored; a security level storage unit by which a security level for each device belonging to a device group is stored; and a display/instruction unit by which a selection screen prompting a user to select one or more devices from the device group is displayed. An instruction for the selection made by the user is received; and a certificate/private key distribution unit by which, via the network, the certificate and the private key for each device are distributed to the one or multiple devices for which the instruction for selection was made. For each device, the selection screen displays the device security level.