公开(公告)号：US08537692B2

公开(公告)日：2013-09-17

申请号：US12607214

申请日：2009-10-28

申请人： Jun Ogawa ,  Takeshi Yasuie ,  Makoto Kubota

发明人： Jun Ogawa ,  Takeshi Yasuie ,  Makoto Kubota

IPC分类号： H04L1/00

CPC分类号： H04L41/0677 ,  H04L41/12

摘要： A network failure detecting method for detecting a failure of a network including a number of transferring devices by tracing data flow rates of the transferring devices based on physical topologies of the transferring devices for the network, composing a group of the transferring devices adjacent to one another, data flow rates of which have failed to be obtained, as one virtual transferring device; and replacing physical topologies of the group of the transferring devices adjacent to one another, data flow rates of which have failed to be obtained, with a physical topology of the composed virtual transferring device.

摘要翻译： 一种网络故障检测方法，用于通过基于所述网络的传送设备的物理拓扑来跟踪传送设备的数据流速来检测包括多个传送设备的网络的故障，构成彼此相邻的一组传送设备 作为一个虚拟传送设备，其数据流速未能获得; 并且通过组合的虚拟传送设备的物理拓扑来替换彼此相邻的传输设备的组的物理拓扑，其数据流速不能获得。

公开(公告)号：US20120158895A1

公开(公告)日：2012-06-21

申请号：US13276513

申请日：2011-10-19

申请人： Taichi SUGIYAMA ,  Takeshi Yasuie ,  Yuji Nomura

发明人： Taichi SUGIYAMA ,  Takeshi Yasuie ,  Yuji Nomura

IPC分类号： G06F15/16

CPC分类号： H04L43/04 ,  H04L43/0864 ,  H04L43/10 ,  H04L43/50

摘要： A testing apparatus includes a storage to store a communication log including a communication time and a response confirmation number of packets, and a processing circuit to generate an additional packet having a communication time and a response confirmation number between two consecutive packets having an interval greater than or equal to a threshold value in the communication log. The interval may be an interval of the communication times of or, an interval of the response confirmation numbers of the two consecutive packets. The testing apparatus also includes an interface unit to send the packets stored in the storage and the additional packet to a destination at a time interval based on communication times thereof.

摘要翻译： 测试装置包括存储包括通信时间和分组的响应确认次数的通信日志的存储器，以及生成具有间隔大于的间隔的两个连续分组之间的通信时间和响应确认号码的附加分组的处理电路 或等于通信日志中的阈值。 该间隔可以是两个连续分组的响应确认编号的通信时间的间隔或间隔。 测试装置还包括一个接口单元，用于根据其通信时间以一定时间间隔将存储在存储器中的分组和附加分组发送到目的地。

公开(公告)号：US20110058482A1

公开(公告)日：2011-03-10

申请号：US12874613

申请日：2010-09-02

申请人： Yuji Nomura ,  Takeshi Yasuie

发明人： Yuji Nomura ,  Takeshi Yasuie

IPC分类号： H04L12/26

CPC分类号： H04L61/2046 ,  H04L29/12264 ,  H04L43/04

摘要： A monitoring apparatus for monitoring packet communication by a plurality of information processing apparatuses. The monitoring apparatus includes a receiving unit for receiving packets transmitted from the plurality of information processing apparatuses, a storage unit for storing a first identification value of a first packet and a first transmission source address of the first packet, and a processing unit for comparing a second identification value of a second packet with the first identification value of the first packet when a second transmission source address of the second packet matches the first transmission source address of the first packet to detect duplication of IP addresses when a difference between the first identification value and the second identification value exceeds a predetermined value.

摘要翻译： 一种用于监视由多个信息处理装置进行分组通信的监视装置。 监视装置包括：接收单元，用于接收从多个信息处理设备发送的分组;存储单元，用于存储第一分组的第一标识值和第一分组的第一发送源地址;以及处理单元，用于比较 当第二分组的第二发送源地址与第一分组的第一发送源地址匹配时，具有第一分组的第一标识值的第二分组的第二识别值与第一分组的第一识别值之间的差异匹配，以检测IP地址的复制 并且第二识别值超过预定值。

公开(公告)号：US20100142395A1

公开(公告)日：2010-06-10

申请号：US12632022

申请日：2009-12-07

申请人： Takeshi Yasuie ,  Yuji Nomura

发明人： Takeshi Yasuie ,  Yuji Nomura

IPC分类号： H04J1/16

CPC分类号： H04L43/0888 ,  H04L43/0864 ,  H04L43/10

摘要： A band measurement method for measuring a band available for communication with a target device connected via a network includes: transmitting a first request having a first data size and requesting a response having a fixed size to the target device via the network; determining a first time between the transmitting of the first request and the receipt of the response upon receipt of the response; transmitting a second request having a second data size and requesting a response having the fixed size to the target device via the network; determining a second time between transmitting of the second request and the receipt of the response upon receipt of the response; and calculating a first communication band available for transmitting data to the target device by dividing the difference between the first and second data sizes by the difference between the first and second times.

摘要翻译： 一种用于测量可用于经由网络连接的目标设备进行通信的频带的频带测量方法，包括：经由网络向目标设备发送具有第一数据大小并且请求具有固定大小的响应的第一请求; 确定在接收到所述响应之后所述第一请求的发送和所述响应的接收之间的第一时间; 通过网络发送具有第二数据大小的第二请求并向目标设备请求具有固定大小的响应; 在接收到所述响应之后确定所述第二请求的发送和所述响应的接收之间的第二时间; 以及通过将所述第一和第二数据大小之间的差除以所述第一和第二次之间的差来计算可用于向所述目标设备发送数据的第一通信频带。

公开(公告)号：US20100103946A1

公开(公告)日：2010-04-29

申请号：US12603803

申请日：2009-10-22

申请人： Yuji Nomura ,  Takeshi Yasuie

发明人： Yuji Nomura ,  Takeshi Yasuie

IPC分类号： H04L12/56

CPC分类号： H04L43/0852 ,  H04L43/0829

摘要： A next sequence number, which is a sequence number that a next packet should have, is compared with the sequence number of a current packet, an identifier of a previous packet is compared with the identifier of the current packet, and a delay is judged to be a simple delay when the next sequence number matches the sequence number of the current packet and the identifier of the previous packet is followed by the identifier of the current packet. Or the delay is judged to be caused by a retransmission when the identifier of the previous packet is not followed by the identifier of the current packet.

摘要翻译： 将下一个分组应该具有的序列号的下一个序列号与当前分组的序列号进行比较，将先前分组的标识符与当前分组的标识符进行比较，并将延迟判断为 当下一个序列号与当前数据包的序列号匹配，而前一个数据包的标识符跟随当前数据包的标识符时，这是一个简单的延迟。 或者当前一个分组的标识符不跟随当前分组的标识符时，延迟被判断为由重传引起。

公开(公告)号：US07672245B2

公开(公告)日：2010-03-02

申请号：US11788686

申请日：2007-04-20

申请人： Takeshi Yasuie ,  Yuji Nomura

发明人： Takeshi Yasuie ,  Yuji Nomura

IPC分类号： H04L12/26 ,  H04L12/28 ,  H04L12/56

CPC分类号： H04L45/18 ,  H04L12/462 ,  H04L43/50 ,  H04L45/00

摘要： A request-packet transmitting unit transmits a predetermined number of request packets having a non-unicast destination address that can be received by a target network including a network identified by a first network address, from a monitoring network identified by a second network address different from the first network address through a layer 3 relay device. A layer 2 loop detecting unit receives response packets corresponding to transmitted request packets through the layer 3 relay device, and detects a layer 2 loop in the target network based on number of received response packets and number of transmitted request packets.

摘要翻译： 请求分组发送单元从由不同于第一网络地址的第二网络地址识别的监视网络发送预定数量的具有可由包括由第一网络地址标识的网络的目标网络接收的非单播目的地地址的请求分组 第一个网络地址通过第3层中继设备。 层2环路检测单元通过层3中继设备接收与发送的请求报文相对应的响应报文，根据接收到的响应报文数量和发送的请求报文数量，检测目标网络中的二层环路。

公开(公告)号：US07197014B2

公开(公告)日：2007-03-27

申请号：US11019547

申请日：2004-12-23

申请人： Tsuneo Katsuyama ,  Masanobu Morinaga ,  Hideaki Miyazaki ,  Yuji Nomura ,  Takeshi Yasuie ,  Noriyuki Fukuyama ,  Masaaki Wakamoto ,  Satoshi Nojima

发明人： Tsuneo Katsuyama ,  Masanobu Morinaga ,  Hideaki Miyazaki ,  Yuji Nomura ,  Takeshi Yasuie ,  Noriyuki Fukuyama ,  Masaaki Wakamoto ,  Satoshi Nojima

IPC分类号： H04J3/14

CPC分类号： H04L47/10 ,  H04L41/0631 ,  H04L43/0829 ,  H04L43/0864 ,  H04L43/0888 ,  H04L47/12 ,  H04L47/22 ,  H04L47/25

摘要： A computer-readable recording medium recording a program capable of accurately analyzing the cause of a performance fault at the very end point of a client system, server system, etc. Outgoing and incoming packets are captured during execution of a communication application to measure a round trip time, and a communication window size of the transmitting source is estimated based on the captured incoming packets. A throughput estimate is calculated from the round trip time and the communication window size, and the estimated value and actual measured value of the throughput are displayed on, for example, a display, together with various other communication parameters including the communication window size and the round trip time, whereby the cause of a performance fault can be accurately located by quantitative analysis.

摘要翻译： 记录能够准确地分析客户端系统，服务器系统等的终点处的性能故障的原因的程序的计算机可读记录介质。在执行通信应用期间捕获出去的和进入的分组以测量一轮 跳闸时间，并且基于所捕获的传入分组来估计发送源的通信窗口大小。 从往返时间和通信窗口大小计算吞吐量估计，并且将吞吐量的估计值和实际测量值与各种其他通信参数一起显示在例如显示器上，包括通信窗口大小和 往返时间，通过定量分析可以准确定位性能故障的原因。

公开(公告)号：US20060285487A1

公开(公告)日：2006-12-21

申请号：US11229689

申请日：2005-09-20

申请人： Takeshi Yasuie ,  Yuji Nomura

发明人： Takeshi Yasuie ,  Yuji Nomura

IPC分类号： H04J1/16

CPC分类号： H04L41/0681 ,  H04L41/0213

摘要： The network failure detection apparatus is realized as a function of a terminal in a network. The network failure detection apparatus acquires packet reception statistic information on a port-by-port basis of a relay unit, and extracts a port having a large amount of packet reception per unit time. When there is one port having a large reception amount in a certain relay unit, the network failure detection apparatus decides that the L2 (layer 2) loop is occurred in the downstream direction of the port concerned. Also, when there are two ports having a large reception amount in a certain relay unit, the network failure detection apparatus decides that a loop is formed at the relevant two ports, in which the L2 loop is occurred.

公开(公告)号：US20060280130A1

公开(公告)日：2006-12-14

申请号：US11266176

申请日：2005-11-04

申请人： Yuji Nomura ,  Takeshi Yasuie

发明人： Yuji Nomura ,  Takeshi Yasuie

IPC分类号： H04L12/28

CPC分类号： H04L12/462 ,  H04L12/4625 ,  H04L69/324 ,  H04L69/40

摘要： In a communication system, transmission/reception of data can be performed between end hosts connected to a relay switch in a subnet even in an improper connection at a L2 level in the relay switch in a communication. Communication failure due to a packet loop generated by the improper connection of the L2 level is recovered by wherein the packet loop is stopped by continuously transmitting long-size MAC packets longer than a packet generating the packet loop into the subnet, which have destinations as a broadcast MAC address or multicast MAC address.

摘要翻译： 在通信系统中，即使在通信中的中继交换机中的L2级别的不正确连接中，也可以在与子网中的中继交换机连接的终端主机之间进行数据的发送/接收。 由于通过L2级别的不正确连接产生的分组环路导致的通信故障被恢复，其中通过连续地发送比生成分组环的分组长的长度大的MAC分组来停止分组环路，该分组环路具有作为 广播MAC地址或组播MAC地址。

公开(公告)号：US09015830B2

公开(公告)日：2015-04-21

申请号：US13357720

申请日：2012-01-25

申请人： Takeshi Yasuie ,  Yuji Nomura ,  Taichi Sugiyama

发明人： Takeshi Yasuie ,  Yuji Nomura ,  Taichi Sugiyama

IPC分类号： G06F11/36 ,  G06F21/44 ,  H04L29/06

CPC分类号： G06F21/44 ,  G06F2221/2119 ,  G06F2221/2129 ,  G06F2221/2149 ,  H04L63/0861

摘要： A verification apparatus for verifying a verified apparatus corresponding to a first apparatus included in a plurality of information processing apparatuses includes a storage and a processor. The storage stores captured data acquired by capturing data transmitted and received among the plurality of information processing apparatuses. The processor receives first data transmitted from the verified apparatus. The first data is destined for a second apparatus included in the plurality of information processing apparatuses. The processor extracts, from the storage, second data transmitted from the second apparatus in response to third data transmitted from the first apparatus to the second apparatus. The third data corresponds to the first data. The processor transmits the extracted second data to the verified apparatus.

摘要翻译： 用于验证与包括在多个信息处理设备中的第一设备相对应的验证设备的验证设备包括存储器和处理器。 存储器通过捕获在多个信息处理设备之间发送和接收的数据而获取的捕获数据。 处理器接收从验证装置发送的第一数据。 第一数据指定给多个信息处理装置中包括的第二装置。 处理器响应于从第一装置发送到第二装置的第三数据，从存储器提取从第二装置发送的第二数据。 第三数据对应于第一数据。 处理器将提取的第二数据发送到经验证的装置。