Nippon Telegraph and Telephone Corporation

Yuki Takei

Masayuki Nishiki

Masato Nishiguchi

Yuta Watanabe

Satoshi Nishiyama

Takayuki Fujiwara

Satoshi Nakatsukasa

Tomonori Takeda

A traffic transfer system includes a switch () and a switch () and distributes and transfers traffic of communication on a network to a plurality of devices. The switch () determines a device of a transfer destination of input traffic among a plurality of devices by a hash function. The switch () transfers traffic to a first device when the first device determined to be a transfer destination is available and transfers traffic to the switch () when the first device is not available. The switch () determines a device to which the traffic transferred by the switch () is transferred, from available devices by a hash function. The switch () transfers the traffic to a second device determined to be a transfer destination.

Traffic transferring device, switch, traffic transferring method, and traffic transferring program

A communication system sets a first priority as a priority of a BGP in a path connecting from a terminal to a terminal through an active system connection unit, sets a second priority lower than the first priority as a priority of a BGP in a path connecting from the terminal to the terminal through the standby system connection unit, and sets a third priority which is lower than the first priority and higher than the second priority as a priority of a BGP in a path connecting the active system connection unit and the standby system connection unit. The communication system discards traffic other than a BGP among traffic from the standby system connection unit to the active system connection unit.

Communication control device, communication control method, communication control program, and communication control system

A layer 2 (L2) switch receives session information and destination information included in upstream communication transmitted from a network device, and compresses the received session information and destination information. Then, the L2 switch stores compressed information that has been compressed, into a memory unit that stores a session table to be referred to when downstream communication is received.

L2 switch, communication control method, and communication control program

A level 2 (L2) switch receives a packet of upstream communication and a packet of downstream communication that are transmitted from a network device. Further, in a case where it is determined whether or not the received packet is a packet of upstream communication, and when it is determined that the packet is of session upstream communication and is a packet at a session start time, the L2 switch acquires session information and destination information included in the packet of the upstream communication, and stores in a session table. Further, when it is determined that the packet is of upstream communication and is not a packet at a session start time, and destination information of the packet is different from destination information stored in the session table, the L2 switch updates the destination information of the packet to the destination information stored in the session table.

In a network management device, a storage unit stores priority of each of a plurality of users using a network system and a plurality of spare configurations used when a failure occurs in an active edge router, and, when a failure occurs in the active edge router, a setting unit sets each of the plurality of spare configurations to any of a plurality of edge routers included in the network system, in order from a user having higher priority, on the basis of the priority of the user.

Network system management apparatus and method

When a controller receives a tunnel setting order from a high-order Ops (operation system), the controller divides the setting order into a first setting processing step related to setting registration of a user, a second setting processing step related to a transfer surface of the tunnel, a third setting processing step related to an interface of each transfer apparatus used for a tunnel of the transfer surface, and a fourth setting processing step related to a parameter to be set to the interface and stores the setting processing steps in a setting management DB. Subsequently, the controller creates a configuration for executing each setting processing step indicated in the tunnel setting order by reflecting information indicated in each divided setting processing step to a template of each setting processing step. In addition, the controller inputs the created configuration to a transfer apparatus at a setting destination of the tunnel.

Configuration feeding device, configuration feeding method, and configuration feeding program

Upon receiving a copy of upstream communication from a first switch, a second switch specifies an NF apparatus serving as a transmission source of the upstream communication, based on apparatus information indicating a MAC address of each apparatus and a transmission source MAC address contained in the copy of the upstream communication. The second switch refers to the apparatus information, and MAC address information indicating, for each port of the switch, a MAC address of an apparatus connected via the port, thereby specifying a port of the second switch connected to the NF apparatus, and a MAC address of the transmission source via the port. The second switch stores session information in which information on the specified port and MAC address is associated with header information set for the copy of the upstream communication. Upon receiving downstream communication, the second switch transfers the downstream communication to the NF apparatus.

L2 switch, communication method, and communication program

A packet transfer apparatus registers time information from a system clock on a CPU region to a time information holding table on a hardware region, adds a receiving time to a received packet using a counter value on a hardware clock and the time information registered in the table, and transfers, to a transfer destination, the packet to which the receiving time has been added.

Packet transfer device, packet transfer method, and packet transfer program

A storage unit stores statistical information including an amount of resource consumption and performance information, which represents a performance, of each piece of hardware of a plurality of types that are candidates for an arrangement destination of a function, an accepting unit accepts inputs of description details of a function in a high-level language corresponding to the hardware of the plurality of types, and a performance requirement that represents a required performance, a performance predicting unit calculates a predicted performance, and a predicted amount of resource consumption, using the description details and a predetermined algorithm for each piece of hardware; and a device selecting unit selects, as an arrangement destination, hardware with the calculated predicted performance and the performance information satisfying the performance requirement and a total value of the predicted amount of resource consumption and the amount of resource consumption being equal to or smaller than a resource capacity.

Installation device and installation method

A communication system includes a programmable switch configured to perform packet transfer and queuing, a plurality of VNFs configured to execute network functions on packets, and a controller configured to control the programmable switch including a queue distribution unit configured to distribute input packets to any of the plurality of VNFs according to an instruction of the controller with respect to a queue group, the plurality of VNFs each include a load measurement unit configured to measure an amount of consumption of server resources and notify the controller of a load status, and the controller includes a load analysis unit configured to analyze a load of each of the plurality of VNFs based on a certain rule, and a queue control unit configured to change a queue distribution rule.

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Tokyo, Japan

Yuki Takei