Denso Corporation

Taichi Itagawa

Yoshifumi Kaku

Yasuhiro Kotani

Kazuya Ohata

A relay device for relaying a frame includes: communication ports respectively connected with communication lines; a receiver receiving a frame addressed to a transfer destination device connected through one communication port; a selector selecting one or more communication ports respectively connected to one or more transfer destination devices, based on connection information of the communication ports and the transfer destination devices and group information indicating whether the transfer destination devices belong to a predetermined group; and a transmitter transmitting the frame through selected communication ports.

Relay device

A network switch includes: a table record portion that records an address solution table that records multiple address information; an information addition portion that adds new address information for a new communication device based on the address solution data to the address information table; a relay portion that relays data other than the address solution data; and a rewrite portion that rewrites at least one of the address solution table or propriety information in accordance with an external instruction output from an external device. The address solution table includes the propriety information indicating availability propriety of the address information for each of the multiple address information. The relay portion relays the data by utilizing the address information set to be utilizable in the propriety information.

Network switch

A relay device for relaying a frame between a plurality of communication lines includes: a rewriting unit configured to rewrite at least one predetermined target field among a plurality of fields included in a received frame; and an execution unit configured to execute a process on the received frame according to a predetermined filtering rule. The execution unit executes the process based on a description of an applied frame which is prepared by applying a description after rewriting the target field in the received frame by the rewriting unit.

A relay device for relaying a frame between communication lines includes: a classification acquisition unit for acquiring at least one classification item group having classification items and representing a classification condition for classifying a received frame to perform a predetermined process; a condition generation unit for generating at least one condition item group having condition items and representing a filtering rule for the frame based on the classification item group; and an execution unit for performing the process on the received frame based on the filtering rule. The classification acquisition unit acquires the classification item group in which a numerical number of the classification items is less than a numerical number of the condition items.

A relay apparatus relays a frame by connection type communication in which the frame is transmitted and received between communication devices, and includes: communication ports each of which is connected to one of the communication devices; a determiner that receives a reception frame from a communication port among the communication ports, the communication port being connected to a communication device as a frame transmission source among the communication devices, and performs determination of the reception frame by referring a header portion of the reception frame; a rewriter that generates a transmission frame obtained by rewriting the header portion of the reception frame in accordance with a predetermined condition; and a transmitter that transmits the transmission frame from a communication port connected to a communication device as transmission destination among the communication ports.

Relay apparatus

A relay device includes: multiple ports for transmitting and receiving a frame; at least one queue arranged for each of the ports, storing a transmission scheduled frame, and having a variable storage capacity; and a capacity controller controlling the storage capacity of each of queues for the ports. A distribution pattern of a value of the storage capacity allocated to each of the queues is defined as a capacity distribution pattern. The capacity distribution pattern includes a first pattern which is the capacity distribution pattern in an initial state and a second pattern which is different from the first pattern. The capacity controller switches the capacity distribution pattern from the first pattern to the second pattern when a predetermined switching condition is satisfied.

A relay apparatus executes either (i) transmitting a received frame, which is received from a communication line, to a different communication line or (ii) discarding the received frame as a discarded frame, according to a preset filtering rule. The relay apparatus stores discard information indicating information on the discarded frame in a preset discard recording storage when discarding the received frame as the discarded frame.

A relay device includes: multiple ports; a queue for each port storing a transmission scheduled frame and having a variable storage capacity with a minimum guarantee value; a shared storage area having a predetermined storage capacity for each queue; and a storage controller controlling to store the transmission scheduled frame in each queue. The storage controller stores the transmission scheduled frame in a storage destination queue when a usage storage capacity of the storage destination queue does not exceed the minimum guarantee value. The storage controller uses a free area as the storage destination queue and stores the transmission scheduled frame in the storage destination queue when the shared storage area has the free storage area for storing the transmission scheduled frame and the usage storage capacity of the storage destination queue exceeds the minimum guarantee value.

A relay apparatus relays a frame between communication lines. The relay apparatus includes an item group record portion that records at least one item group that includes classification items for identifying a received frame; a condition record portion that records action conditions each of which includes a setting of whether each of the classification items is set to be valid, and a process content for the frame; a rule generation portion that generates a filtering rule for the received frame by extracting at least one of the classification items set to be valid for each of the action conditions and by associating the extracted classification item with the process content, when receiving the frame; and a process execution portion that executes a process on the received frame in accordance with the filtering rule.

A repeater device in a communication network includes a microcomputer configured to determine whether the repeater device will function as a mirroring switch that generates and transfers a mirror frame, or as a mirror-transfer switch that transfers the mirror frame. When the repeater device functions as a mirror switch and performs port mirroring, the repeater device adds monitor port and destination port information of the mirroring switch to the mirror frame. When the repeater device functions as a mirror-transfer switch, the repeater device adds sender port and destination port information of the mirror-transfer switch to the mirror frame. A monitor device in the communication network uses information in the mirror frame to identify a mirror source device in the network.

Repeater device

A relay device in a communication network includes: a configuration determination unit determining whether a configuration frame is received; a comparison unit; first and second configuration units; and a configuration transfer unit. The comparison unit determines whether the propagation number at reception time is equal to the total number of target devices in a configuration frame. When the propagation number is not equal to the total number, the first configuration unit sets a port in the transfer destination information to the mirror output port. When the propagation number is not equal to the total number, the configuration transfer unit outputs the updated configuration frame from the mirror input port. When the propagation number is equal to the total number, the second configuration unit sets a port in the transfer destination information to the mirror output port.

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Kariya, Japan

Taichi Itagawa