Fujitsu Corporation

Atsushi Kitada

Kazuto Nishimura

Masato Okuda

Naoki Matsuoka

Hiroshi Tomonaga

Masatake Miyabe

Yuji Ikegami

Haruyuki Takeyoshi

Akihiro Hata

Tsutomu Noguchi

Sotaro Oda

A method for determining a container to be migrated is implemented by a first node executing a plurality of containers. The method includes determining a first container included in the plurality of the containers as the container to be migrated to a second node, and migrating the first container from the first node to the second node via a network. The plurality of containers in which a response time increases in a time zone in which a usage rate of a resource used by the first node increases, includes the first container and a second container each having an increase amount of a usage amount of the resource in the time zone and an increase amount of a data processing amount in the time zone that affects the increase in the response time.

Method for determining container to be migrated and non-transitory computer-readable medium

A communication coupling verification method executed by a computer, the communication coupling verification method includes identifying both setting information before a setting change of each of network devices arranged in a network and forwarding information before the setting change; identifying both setting information after the setting change and the forwarding information after the setting change; generating a first model before the setting change and a second model after the setting change by using the setting information before the setting change, the forwarding information before the setting change, the setting information after the setting change, and the forwarding information after the setting change; and determining influence of the setting change on the network based on a difference between the generated first model and the generated second model.

Communication coupling verification method, storage medium, and network verification apparatus

There is provided a transmission apparatus including at least one memory in which a first data including a first destination information and a second data including a second destination information are stored, and at least one processor coupled to the at least one memory and the at least one processor configured to control the at least one memory to output the first data and the second data stored in the at least one memory according to a set rate, and control the set rate to output one of the first data and the second data according to a priority degree.

Transmission apparatus and transmission processing method

A communication device, includes: a plurality of queues each configured to accumulate a packet; a scheduler configured to provide a permissible readout amount to each of the plurality of queues in accordance with an order that is based on a priority of each queue; a read processor configured to read out the packet from the plurality of queues, the permissible readout amount being consumed according to amount of the packets read out; and an accumulation amount counter configured to count an accumulation amount of the packets accumulated in each of the plurality of queues, wherein the accumulation amount counter notifies the scheduler of a change in the accumulation amount, and wherein the scheduler adjusts the priority of, among the plurality of queues, the queue of which the accumulation amount has changed, in response to the notification from the accumulation amount counter.

Communication device and packet scheduling method

A packet exchanging device includes queues each configured to accumulate one or more packets, a scheduler unit configured to give a certain permissible reading amount indicating amounts of data of readable packets to each of the queues, and a reading processing unit configured to read the one or more packets from the queues by the permissible reading amount in an order in which a reading condition regarding the permissible reading amount for each queue and an amount of data in the one or more packets accumulated in each queue is satisfied.

Packet exchanging device, transmission apparatus, and packet scheduling method

A bandwidth control device includes: a management unit to subtract, when a first bandwidth control device (first device) or one or more second bandwidth control devices (second devices) allow a packet to pass, an amount of the passed packet from a permissible passage amount to be passed the first device; and a correction unit to correct the permissible passage amount of the first device or a threshold value of the first device based on a result of a comparison between a passage amount of packets passed the first device and passage amounts of packets passed the second devices, wherein the first device determines whether a packet is to be allowed to pass through or not based on a result of a comparison between the permissible passage amount and the threshold value and allows the packet to pass or discard the packet according to the determination result.

Bandwidth control device and method to reduce difference in pass bandwidth

A packet processing apparatus includes a processor configured to execute a process. The process includes: determining a memory from which packets are read, out of a first memory that stores the packets and a second memory that stores the packets, in accordance with number of pointers indicative of storage locations of the packets in the first memory; and reading the packets stored at the storage locations indicated by the pointers, from the memory determined at the determining.

Packet processing apparatus and packet processing method

A method includes scheduling a packet to be transmitted to a second relay device instead of a first relay device, when a plurality of packets actually transmitted or to be transmitted under a rule, which causes the packets to dispersively pass through different relay devices when destination addresses of the packets are the same, are disproportionally transmitted to the first relay device, and the rule indicates that the packet is to be transmitted to the first relay device.

Information processing method, information processing circuit, and information processing apparatus

A packet relay apparatus includes a first packet processing circuit and a second packet processing circuit. The first packet processing circuit executes, discarding data packets from among data packets, and transferring the rest of the data packets to the second packet processing circuit, counting discard number of the data packets, determining whether or not the discard number is equal to or greater than a threshold and transferring, if the discard number is equal to or greater than the threshold, a discard number information packet including discard number information indicating the discard number to the second packet processing circuit. The second packet processing circuit executes discarding data packets from among the data packets, counting discard number of the data packets and collecting the discard number counted by the second packet processing circuit and the discard number indicated by the discard number information included in the discard number information packet.

Packet relay apparatus and measurement method for measuring discard number of data packets

A packet processing apparatus includes a packet processing unit that performs a packet output process, an extraction unit that extracts information about each packet before the packet is inputted to the packet processing unit, and a contention handling unit that performs a process avoiding occurrence of contention between/among predetermined processes before the packet is inputted in the packet processing unit, the contention being predicted based on the information about the packet. As a process avoiding contention among series of processes including, for example, processes performed by the packet processing unit to read an amount of transmission rights from a storage unit, do subtraction, and write the amount of transmission rights back into the storage unit, the contention handling unit detects packets belonging to a same flow from information about predetermined number of successive packets and reports the information to the packet processing unit on a flow by flow basis.

A transmission system including: transmission apparatuses; and a destination management apparatus including: first ports which are coupled to the transmission apparatuses; and a first processor configured to manage an address entry which indicates a relation between the first port which receives the frame from among the first ports and a transmission source address included in the frame; and to transfer the frame received by one of the first ports, to the first port in association with the transmission destination address from among the first ports based on the address entry, wherein one of the transmission apparatuses including: second ports which are coupled to another transmission apparatus in the network; a third port which is coupled to the destination management apparatus; and a second processor configured to transmit the frame received by one of the second ports only to the third port.

Transmission system, transmission apparatus, destination management apparatus

A packet transmission device includes a buffer stores packet data in any of queues, a queue manager outputs queue-status signals indicating whether or not transmittable packet data exists in the corresponding one of the queues, a bandwidth controller outputs token-status signals indicating whether or not an amount of the tokens accumulated at a certain period for the corresponding queue is larger than a token threshold provided for the corresponding queue, a queue selector preferentially selects any queue whose duration time of a transmittable state in which the corresponding queue status signal indicates that transmittable packet data exists in the corresponding queue and the corresponding token-status signal indicates that the amount of the accumulated tokens is larger than the token threshold provided for the corresponding queue is greater than a duration-time threshold provided for the corresponding queue, and a buffer reader controls reading of the packet data from the selected queue.

Packet transmission device, memory control circuit, and packet transmission method

A first apparatus receives, at a first transmission rate, packets belonging to a target packet flow on which packet-shaping processing for controlling network traffic is to be performed, and stores the received packets in a first packet buffer. Then, the first apparatus performs first packet-shaping processing on the target packet flow by transmitting, at a second transmission rate, packets that belong to the target packet flow and read out from the first packet buffer. A second apparatus stores packets received from the first apparatus in a second packet buffer. When a shortage of buffer resource for storing packets belonging to the target packet flow occurs in the first packet buffer, the second apparatus performs second packet-shaping processing on the target packet flow by transmitting, at a third transmission rate, packets that belong to the target packet flow and are read out from the second packet buffer.

Apparatus for performing packet-shaping on a packet flow

A communication device of the present invention performs communication over a network where a session is identified based on a source address set in a frame. The communication device comprises an interface unit for connecting to the network, a management unit for managing a plurality of addresses, a request unit for transmitting a frame including a session establishment request to an authenticator system provided on the network through said interface unit, and an address setting unit for setting one of the plurality of addresses managed by said management unit as a source address of the frame including the session establishment request.

Communication device

A client terminal at one location a is accommodated in an edge node (gateway) having a redundant configuration composed of a primary node and a secondary node. Normally a primary edge node PE A is used to enable communications with partner client terminals at locations b and c via opposing edge nodes PE B and PE C. Normally, a database storing the information of a label used by the primary edge node is synchronized with the database of the secondary edge node. A primary loopback address is stored in the secondary edge node and nullified. When the primary edge node fails, the loopback address of the primary edge node is validated and the secondary edge node restarts communications with the opposing edge nodes using the information of the database storing the information of the label used by the primary PE and the same label as the primary edge node.

Growing community of inventors

Kawasaki, Japan

Atsushi Kitada