Nec Corporation

Nippon Steel Corporation

Junichi Higuchi

Youichi Hidaka

Jun Suzuki

Takashi Yoshikawa

Atsushi Iwata

Hideyuki Shimonishi

Shigeyuki Yanagimachi

Yuki Hayashi

Masato Yasuda

Hiroyuki Hirata

Nobuyuki Enomoto

Yukihiro Hara

Nobuharu Kami

Hideya Kaminaka

Junko Imamura

Katsuki Tanaka

Mikiharu Yamashita

Teruyuki Baba

Yoshiaki Yamade

Provided a device that performs at least one of an input and an output, a device power supply control unit that controls power supply to the device, and a device power supply control instruction unit that instructs the device power supply control unit to stop power supply to the device based on an instruction from an operation unit arranged in the apparatus, wherein stopping power supply to the device makes it possible to set the device that is fixedly connected in the apparatus to a pseudo removed state.

Remote terminal apparatus enabled to reset a plug-and-play compatible device even fixedly connected without removing the device from the apparatus, control method thereof, computer system, and non-transitory recording medium

A bridge connecting apparatus comprises: a connection state control part that controls a first connection state between the bridge connecting apparatus and the other bridge connecting apparatus; and a connection state monitoring part that monitors the first connection state recognized on the connection state control part and a second connection state between the first device recognized on the OS and the second device. The connection state monitoring part instructs to the connection state control part so that the first connection state does not come into connection when it is detected that the first connection state is at non-connection. The connection state control part controls so that the first connection state does not come into connection according to the instruction from the connection state monitoring part.

Bridge connecting apparatus, communication control system, method and program

An information processing device includes a bridge unit that connects with one or a plurality of IO device groups via a network, a connection management unit that manages a connection of the bridge unit, an allocation priority instruction unit that stores an instruction or a fixed value that is a priority condition for allocating resources, a resource amount search unit that searches resources used by IO devices of an entire system that includes the IO devices, a remaining resource calculation unit that calculates a remaining resource amount, a reservation resource amount output unit that calculates and outputs a number of virtual PCI bridges and a reservation resource amount, and a virtual bridge resource setting unit that sets the bridge unit based on the number of virtual PCI bridges and the reservation resource amount.

Information processing device, resource allocation method, and computer-readable recording medium

A network system of the present invention includes a computer and a device connected via a network, and a system management device. The computer and the device include, respectively, bridges that encapsulate transmission/reception data transmitted and received to and from each other and transmit and receive the data to and from each other via the network. Each of the bridges includes a control data transmitting means for generating control data for controlling the state of the system based on control auxiliary data issued from the computer or the device and used for controlling the state of the system, and transmitting the control data to the system management device via the network. The system management device includes a system controlling means for controlling the state of the system in accordance with the control data received thereby.

Network system

An information processing device that are capable of continuing access to an I/O device by operational computers even when a failure has occurred in a management computer is provided. A virtualization bridge () includes a monitoring unit () and a backup control unit (). The virtualization bridge () provides operational computers () with virtual functions of an I/O device (). The monitoring unit () detects failures in a management computer (). The backup control unit () generates backup management information () on the basis of packets transmitted and received between the management computer () and the I/O device (), and, when a failure in the management computer () is detected by the monitoring unit (), controls the I/O deviceon the basis of the backup management information () in place of the management computer ().

Information processing device, I/O system, and I/O control method

An I/O device sharing system characterized by comprising: an I/O device () shared by a plurality of hosts (-to-N); a system manager () which sets the I/O device (); a virtual bridge () which virtualizes the I/O device (); and a network () which connects the I/O device (), the system manager (), the plurality of hosts (-to-N) and the virtual bridge () to each other, wherein the virtual bridge () includes a connection virtualization unit () by which it is detected that an address setting of a plurality of virtual functions provided in the I/O device () that is set by the system manager () is performed, the virtual function is enabled, or both of them are performed and each host is permitted to access each virtual function.

I/O device sharing system and I/O device sharing method

A host monitoring unit in a host connection device () detects a change in a connection status between a host device () and the host connection device () based on a change in power status of the host device (), and notifies a host connection controller. The host connection controller notifies an I/O connection controller in an I/O connection device () connected with an I/O device () having a power linking permitted of the change in the connection status, and sets or cancels an interconnection. After the completion of the setting or cancellation of the interconnection, the I/O connection controller notifies an I/O power supply controller of the change in the connection status, and the I/O power supply controller controls an I/O power supply ().

Computer system, connection device, power supply control method, and power supply control program recording medium

Any packet loss is detected very quickly by means of only a series of sequence number in a multi-path environment where a transmitter and a receiver are connected to each other by way of a plurality of networks when no inversion of sequence arises in any of the networks. A communication apparatus includes a plurality of sequence buffers arranged at each network to accumulate packets until a sequence acknowledgement and an absence detecting section adapted to determine the occurrence of an absence of a packet when one or more packets are accumulated in all the sequence buffers. With this arrangement, the absence detecting section of the receiver monitors the packets staying in the sequence guaranteeing buffer arranged in each of the network, paying attention to the characteristic that packets are stored in the sequence buffers of all the networks when a packet loss takes place.

Communication apparatus, communication system, absent packet detecting method and absent packet detecting program

Fault tolerance is improved, a functional limitation at the time of start-up of an I/O system is avoided, and a start-up time is shortened. A downstream PCI Express bridge sets a PCI Express device connected to the downstream PCI Express bridge itself, among a plurality of single root-compatible PCI Express devices shared by a plurality of root complexes connected to a plurality of upstream PCI Express bridges that exchange data with the downstream PC Express bridge itself through a network, controls and monitors a state of a physical link with the PCI Express device connected to the downstream PCI Express bridge itself, and performs monitoring and notification of an error of the PCI Express device connected to the downstream PCI Express bridge itself.

I/O system, downstream PCI express bridge, interface sharing method, and program

A trouble analysis apparatus is provided which includes: a system topology storing portion; an error detection information receiving portion which collects error detection information; and a trouble source determination portion which, based on both the error detection information collected by the error detection information receiving portion and system topology information stored in the system topology information storing portion, determines a trouble source functional element that is presumed as a functional element which is a source of a system trouble. Links included in the system topology information have information indicating spreading directions of error operations between the functional elements when trouble occurs. When the trouble source detection portion receives the error detection information with regard to multiple error functional elements, the trouble source determination portion sequentially selects one of the multiple error functional elements. The trouble source detection portion determines whether or not directions from the selected error functional element to other error functional elements conform to the spreading directions included in the system topology information. The trouble source determination portion determines the selected error functional element as the trouble source functional element when the spreading directions are conformable.

Trouble analysis apparatus

Provided are a first PCI-PCI bridge that handles Multi Root to connect to a plurality of root complexes; a second PCI-PCI bridge that connects to an endpoint; a virtual PCI Express switch that performs a switching process between the first and second PCI-PCI bridges; and a network control device that transfers data that is to be processed in the virtual PCI Express switch to an external switch through a network without passing through a PCI-PCI bridge.

PCI express switch, PCI express system, and network control method

A switch () includes a plurality of bridges () and a switch forwarding mechanism (). Each of the bridges transmits and receives a TLP frame complying with PCI express to and from a device connected to each of the bridges. The switch forwarding mechanism includes a plurality of ports () to which the bridges are connected, respectively, selects an output port in dependence on a combination of destination information on the TLP frame input from one of the plurality of ports and the port which input the TLP frame, and outputs the TLP frame from the selected output port.

Internet connection switch and internet connection system

An I/O equipment sharing system includes CPUs, a plurality of route complexes coupled to the CPUs, upstream PCI Express-bridges coupled to the route complexes, downstream PCI Express-bridges coupled to the upstream PCI Express-bridges through a network, and I/O equipment coupled to the downstream PCI Express-bridges. In the above configuration, the I/O equipment are shared between the CPUs using the identifiers of the network (for example, Ethernet VLAN IDs), the identifiers are set so that they do not overlap between the respective CPUs and necessary I/O equipment is set to a set identifier. Further, an identifier is set to a plurality of the same I/O equipment required by the respective CPUs.

Shared system of I/O equipment, shared system of information processing apparatus, and method used thereto

A network system that is part of a main system includes: a first PCI express-network bridge with a first control unit and a first PCI express adapter terminating a first PCI express bus; and a second PCI express-network bridge connected to the first PCI express-network bridge through a network. The second PCI express-network bridge includes a second control unit and a second PCI express adapter terminating a second PCI express bus, wherein the first control unit detects a destination of a packet sent from the first PCI express adapter, searches a physical address of the destination from a packet encapsulating table, and encapsulates the packet in a frame so that the frame includes the physical address, and wherein the second control unit removes the encapsulation tagged to the packet, and transfers the packet to the destination through the second PCI express bus by referring to a PCI express configuration register.

Switch and network bridge apparatus

A packet communication device autonomously selects an appropriate operation mode according to a connection environment to an external device before a service of the device is started. When the device is connected to the external buses, connection interface units notify an external device discrimination unit of connection of the device. The external device discrimination unit issues a polling packet to the connected device, discriminates the connected external device on the basis of the response packet, and notifies an operation mode switching unit. The operation mode switching unit selects an operation mode conforming to a connection environment of the packet communication device to the external device and switches the operation mode of the device to the mode. The selection of the operation modes is completed before the entire device or a portion of the device which is influenced by the selection of the operation mode starts a service to the external device to which the packet communication device is connected.

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Tokyo, Japan

Junichi Higuchi