[go: up one dir, main page]

WO2015114714A1 - Système, procédé et programme de détection de topologie de réseau, et appareil de commande - Google Patents

Système, procédé et programme de détection de topologie de réseau, et appareil de commande Download PDF

Info

Publication number
WO2015114714A1
WO2015114714A1 PCT/JP2014/006140 JP2014006140W WO2015114714A1 WO 2015114714 A1 WO2015114714 A1 WO 2015114714A1 JP 2014006140 W JP2014006140 W JP 2014006140W WO 2015114714 A1 WO2015114714 A1 WO 2015114714A1
Authority
WO
WIPO (PCT)
Prior art keywords
connection
port
group
detection
protocol packet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2014/006140
Other languages
English (en)
Japanese (ja)
Inventor
市川　富彦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Publication of WO2015114714A1 publication Critical patent/WO2015114714A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport

Definitions

  • the present invention relates to a network topology detection system, a network topology detection method, a network topology detection program, and a control device that detect connection of a network.
  • Patent Document 1 An example of a system that automatically detects a network topology and detects an erroneous connection is described in Patent Document 1.
  • Patent Document 1 describes a method of manually inputting connection information between devices of a network and a method of using a unique protocol provided by a device developer for network topology detection.
  • a general OpenFlow (OpenFlow) control device uses a protocol (connection detection protocol) that detects the connection state between OFS (OpenFlow Switch, OpenFlow switch) when automatically acquiring network topology information. To do. When a packet of the connection detection protocol is transmitted to port 1 of OFS1, if a corresponding packet is received from port 2 of OFS2, it is determined that there is a connection (link) from port 1 of OFS1 to port 2 of OFS2. .
  • connection detection protocol connection detection protocol
  • an OpenFlow control device (not shown) transmits a connection detection protocol packet to all ports of all OFS under control. Then, the OpenFlow control device confirms the connection states of all the ports based on whether or not a connection detection protocol packet has been received.
  • the OpenFlow control device transmits connection detection protocol packets to a total of 12 ports of 3 each for OFS 1, OFS 2, OFS 3, and OFS 4 under control. Since OFS1 port 1 is an external connection, the OpenFlow control device does not receive the connection detection protocol packet transmitted to OFS1 port 1 from anywhere. Therefore, it is determined that OFS1 port 1 is an external connection (1). Since the OFS 1 port 2 is connected to the OFS 2 port 1, the OpenFlow control device receives the connection detection protocol packet transmitted to the OFS 1 port 2 from the OFS 2 port 1. Therefore, it is determined that there is a connection (link) from OFS1 port 2 to OFS2 port 1 (2).
  • connection detection protocol packet transmitted to OFS2 port 1 from OFS1 port 2
  • connection detection protocol packet transmitted to OFS2 port 1 from OFS1 port 2
  • connection opposite to (2) there is also a connection from OFS2 port 1 to OFS1 port 2 (connection opposite to (2)).
  • the same determination is made for reception of the remaining connection detection protocol packets.
  • connection detection protocol is executed by transmitting a packet on a communication path used by a general user, if the frequency is high, it becomes a factor that hinders communication of the general user. Therefore, it is desirable that the number of packet transmissions of the connection detection protocol is as small as possible.
  • an object of the present invention is to provide a network topology detection system, method, program, and control device that reduce the number of times of transmission of connection detection protocol packets for detecting the topology of the network.
  • a network topology detection system includes a plurality of switches that transmit and receive packets to each other and a control device that controls the plurality of switches, and the control device does not detect a connection among ports of the plurality of switches.
  • Storage means for storing a plurality of connection undetected groups holding information indicating ports, and a plurality of connection detection groups holding information indicating ports detected to be connected among ports of a plurality of switches, and a connection undetected group
  • Topology management means for transmitting a connection detection protocol packet, which is a packet for detecting a connection state between the plurality of switches, to each port belonging to the group, and the topology management means includes a first connection undetected group. After sending a connection detection protocol packet to the first port belonging to If the second ports belonging to discovery group has received the connection detection protocol packets, and wherein the moving information indicating the information and the second port of a first port for connection detection group.
  • a control device is a control device that controls a plurality of switches that mutually transmit and receive packets, and that has a plurality of unconnected connections that hold information indicating a port from which no connection is detected among the ports of the plurality of switches.
  • a storage means for storing a plurality of connection detection groups that hold information indicating a detection detected port among the ports of the detection group and a plurality of switches, and a port belonging to the connection non-detection group between the plurality of switches.
  • Topology management means for transmitting a connection detection protocol packet, which is a packet for detecting a connection state, for each group, and the topology management means sends a connection detection protocol packet to the first port belonging to the first connection undetected group. Is transmitted from the second port belonging to the second undetected connection group.
  • a network topology detection method is a network topology detection method used in a network topology detection system including a plurality of switches that transmit and receive packets to each other and a control device that controls the plurality of switches.
  • a plurality of connection undetected groups that hold information indicating ports in which no connection is detected among switch ports, and a plurality of connection detection groups that hold information indicating ports in which connections are detected among ports of a plurality of switches
  • a connection detection protocol packet which is a packet for detecting a connection state between the plurality of switches, is transmitted for each group to a port belonging to the connection undetected group. After sending a connection detection protocol packet to port 1, When the connection detection protocol packet is received from the second port belonging to the connection undetected group, information indicating the first port and information indicating the second port are moved to the connection detection group.
  • a network topology detection program is a network topology detection program used in a network topology detection system including a plurality of switches that mutually transmit and receive packets and a control device that controls the plurality of switches.
  • a plurality of connection undetected groups that hold information indicating ports that are not detected in connection among a plurality of switch ports, and a plurality of information that indicate information indicating ports in which connections are detected among ports of a plurality of switches.
  • Run topology management processing When the connection detection protocol packet is received from the second port belonging to the second connection undetected group after transmitting the connection detection protocol packet to the first port belonging to the first connection undetected group, The information indicating the first port and the information indicating the second port are moved to the connection detection group.
  • connection detection protocol packet transmissions for detecting the topology of the network can be reduced.
  • FIG. 5 is an explanatory diagram showing a state of the system after a distribution operation after connection detection is performed on the other undetected group from the state of the system shown in FIG. 4.
  • the network topology detection system of the present embodiment uses this property to reduce the number of connection detection protocol packet transmissions.
  • FIG. 1 is a block diagram showing a configuration in an embodiment of a network topology detection system.
  • the network topology detection system of the present embodiment includes an OpenFlow control device 10 and a plurality of OFSs 20.
  • the OpenFlow control device 10 includes a topology management unit 11 that manages the network topology of the OFS 20 to be controlled, and a storage unit 13.
  • the storage unit 13 stores the topology management table 12.
  • the topology management table 12 holds network topology data.
  • the topology management table 12 includes information indicating the ports of the OFS 20, including a plurality of connection undetected groups including a port where connection is not detected, and a plurality of ports including a port where connection is detected among ports of a plurality of OpenFlow switches. Separately hold the connection detection group.
  • the topology management table 12 holds information indicating the ports of the OFS 20 in four groups of connection undetected A, connection undetected B, connection detected A, and connection detected B.
  • the topology management unit 11 transmits a connection detection protocol packet, which is a packet for detecting a connection state between the OFSs 20, to the ports of the OFS 20 belonging to the connection undetected group for each group.
  • the topology management unit 11 is realized by, for example, hardware designed to perform specific arithmetic processing or the like, or an information processing device such as a CPU (Central Processing Unit) that operates according to a program.
  • the program is stored in a non-transitory computer-readable storage medium.
  • the storage unit 13 is realized by a storage device such as an HDD (Hard disk drive).
  • the OFS 20 includes a connection detection protocol transmission unit 21 and a connection detection protocol reception unit 22.
  • the connection detection protocol transmission unit 21 transmits the connection detection protocol packet sent from the OpenFlow control device 10 to its own port to the other OFS 20.
  • connection detection protocol receiving unit 22 receives a connection detection protocol packet sent from another OFS 20 from its own port, and sends it to the OpenFlow control device 10.
  • FIG. 2 is a flowchart showing the operation of the connection detection phase in the embodiment of the network topology detection system.
  • the topology management unit 11 collectively distributes all ports of the OFS into the group of connection undetected A and connection undetected B in the order of recognition of the OFS (step A1).
  • FIG. 3 is an explanatory diagram showing the state of the system after this group distribution operation has been performed.
  • the topology management unit 11 transmits a connection detection protocol packet to the port of connection not detected A (step A2). Then, the topology management unit 11 waits for a predetermined time to receive the connection detection protocol packet (step A3). When the topology management unit 11 receives the connection detection protocol packet, the topology management unit 11 moves the transmission source port to the connection detection A, moves the reception destination port to the connection detection B, and determines that these two ports are connected. (Step A4). At this time, when the topology management unit 11 receives both directions, the topology management unit 11 determines a group based on the previously received direction. The topology management unit 11 does nothing if the connection detection protocol packet is not received.
  • FIG. 4 is an explanatory view showing a state after the distribution operation after the connection detection from step A2 to A4 is performed from the state shown in FIG.
  • connection not detected A includes six data of OFS 1 port 1, OFS 1 port 2, OFS 1 port 3, OFS 3 port 1, OFS 3 port 2, and OFS 3 port 3. Therefore, topology management unit 11 transmits a connection detection protocol packet to these six ports (step A2). Since OFS1 port 1 is an external connection, topology management unit 11 does not receive the connection detection protocol packet transmitted to OFS1 port 1 (“not received” in step A3).
  • OFS1 port 1 remains in connection undetected A as it is. Since the OFS1 port 2 is connected to the OFS2 port 1, the topology management unit 11 receives the connection detection protocol packet transmitted to the OFS1 port 2 from the OFS2 port 1 (“received” in step A3). In this case, topology management unit 11 moves OFS1 port 2 to connection detection A and moves OFS2 port 1 to connection detection B (step A4).
  • the topology management unit 11 receives the connection detection protocol packet transmitted to the OFS 1 port 3 from the OFS 3 port 3. Further, the topology management unit 11 receives the connection detection protocol packet transmitted to the OFS 3 port 3 from the OFS 1 port 3.
  • topology management unit 11 moves OFS1 port 3 to connection detection A, moves OFS3 port 3 to connection detection B, and determines that these two ports are connected. (Step A4). The same processing is performed for the reception of the remaining connection detection protocol packets, and the ports of the OFS belonging to each group are in the state shown in FIG.
  • the topology management unit 11 transmits a connection detection protocol packet to the port of connection undetected B (step A5). Then, topology management unit 11 waits for a certain period of time to receive the connection detection protocol packet (step A6). When the topology management unit 11 receives the connection detection protocol packet, the topology management unit 11 moves the transmission source port to the connection detection B, moves the reception destination port to the connection detection A, and determines that these two ports are connected. (Step A7). When the topology management unit 11 receives a connection detection protocol packet between two ports in both directions, the topology management unit 11 determines a group based on the previously received direction. The topology management unit 11 does nothing if the connection detection protocol packet is not received. Thereafter, the processing after step A2 is repeated.
  • FIG. 5 is an explanatory diagram showing the state of the system after performing the operations from steps A5 to A7 from the state shown in FIG.
  • the connection undetected B includes four of the OFS 2 port 2, the OFS 2 port 3, the OFS 4 port 2, and the OFS 4 port 3. Therefore, topology management unit 11 transmits a connection detection protocol packet to these four ports (step A5). Since OFS2 port 2 is an external connection, topology management unit 11 does not receive the connection detection protocol packet transmitted to OFS2 port 2 (“not received” in step A6). Therefore, OFS2 port 2 remains in connection undetected B as it is. Since the OFS 2 port 3 is connected to the OFS 4 port 3, the topology management unit 11 receives the connection detection protocol packet transmitted to the OFS 2 port 3 from the OFS 4 port 3 (“received” in step A 6).
  • the topology management unit 11 receives the connection detection protocol packet transmitted to the OFS 4 port 3 from the OFS 2 port 3 (“received” in step A 6). If the reception from the OFS2 port 3 is early, the topology management unit 11 assigns the OFS4 port 3 to the connection detection B, assigns the OFS2 port 3 to the connection detection A, and determines that these two ports are connected ( Step A7). The same processing is performed for reception of the remaining connection detection protocol packets, and the topology management table 12 is in the state shown in FIG.
  • the connection detection protocol packet is transmitted to all ports as in the example shown in FIG. 11, the number of packet transmissions in the connection detection phase is 12, which is the total number of ports. Therefore, the network topology detection system can reduce the number of times of connection detection protocol packet transmission compared to a system that transmits ports to all ports without grouping the ports.
  • FIG. 6 is a flowchart showing the operation in the connection maintenance confirmation phase of the network topology detection system.
  • the topology management unit 11 transmits a connection detection protocol packet to the connection detection A port (step B1). Then, topology management unit 11 waits for a certain period of time to receive the connection detection protocol packet (step B2). When the topology management unit 11 receives the connection detection protocol packet, the topology management unit 11 checks whether the destination port has changed (step B3). If there is no change, one connection maintenance confirmation is completed. When the topology management unit 11 does not receive the connection detection protocol packet from anywhere, the topology management unit 11 moves each port from the connection detection A to the connection non-detection A, and moves from the connection detection B to the connection non-detection B (step). B4).
  • topology management unit 11 moves the old destination port to the connection undetected B and moves the new destination port to the connection detection B.
  • topology management unit 11 moves the source port to connection undetected A (step B5).
  • FIG. 7 is an explanatory diagram showing a specific operation in the connection maintenance confirmation phase.
  • connection detection A since connection detection A includes four ports, OFS1 port 2, OFS1 port 3, OFS3 port 2, and OFS2 port 3, connection detection protocol packets are transmitted to these four ports (step B1). If the connection between OFS1 port 2 and OFS2 port 1 is maintained, topology management unit 11 receives the connection detection protocol packet transmitted to OFS1 port 2 from OFS2 port 1 (“received” in step B2). Since there is no change in the destination port (NO in step B3), the connection maintenance confirmation is completed. The topology management unit 11 performs the same process for the remaining three ports.
  • the topology management unit 11 receives the connection detection protocol packet transmitted to the OFS1 port 2 from the OFS2 port 1, thereby confirming that the connection between the OFS1 port 2 and the OFS2 port 1 is maintained. .
  • the detected ports are distributed to different groups in the connection detection phase, it can be considered that all connection maintenance confirmations have been made by checking only one group.
  • the network topology detection system confirms connection from the opposite direction after a predetermined period of time when confirmation of connection from one direction is performed. That is, the network topology detection system alternately performs the operation shown in FIG. 6 and the reverse operation shown in FIG.
  • an operation indicating confirmation of connection from the reverse direction in the connection maintenance confirmation phase will be described.
  • FIG. 8 is a flowchart showing the operation of the connection maintenance confirmation phase in the reverse direction.
  • the topology management unit 11 transmits a connection detection protocol packet to the connection detection B port (step B6). Then, topology management unit 11 waits for a predetermined time to receive the connection detection protocol packet (step B7). When the topology management unit 11 receives the connection detection protocol packet, the topology management unit 11 checks whether the destination port has changed (step B8). If there is no change, one connection maintenance confirmation is completed. When the topology management unit 11 does not receive the connection detection protocol packet from anywhere, the topology management unit 11 moves each port from the connection detection B to the connection non-detection B, and moves from the connection detection A to the connection non-detection A (step). B9).
  • topology management unit 11 moves the old destination port to the connection not detected A and moves the new destination port to the connection detection A.
  • topology management unit 11 moves the port to connection undetected B (step B10).
  • connection detection B includes four ports, OFS2 port 1, OFS3 port 3, OFS4 port 1, and OFS4 port 3, topology management unit 11 transmits a connection detection protocol packet to these four ports (step B6). If the connection between OFS2 port 1 and OFS1 port 2 is maintained, topology management unit 11 receives the connection detection protocol packet transmitted to OFS2 port 1 from OFS1 port 2 (“received” in step B7). Since there is no change in the destination port (NO in step B8), the connection maintenance confirmation is completed. The topology management unit 11 performs the same process for the remaining three ports.
  • the number of packet transmissions in the connection maintenance confirmation phase is 4 in the configuration example shown in FIG.
  • the number of packet transmissions in the connection maintenance confirmation phase is 8. Therefore, the network topology detection system can reduce the number of transmissions of connection detection protocol packets for connection maintenance confirmation, compared to a method of transmitting ports to all ports without grouping the ports. In particular, in the connection detection phase, since the detected ports are allocated to different groups, the number of protocol packet transmissions can be more reliably reduced in the connection maintenance confirmation phase.
  • FIG. 9 is an explanatory diagram showing another configuration example of the network topology detection system of the present embodiment.
  • the connection between OFS1 and OFS4 and the connection between OFS2 and OFS3 are increased compared to the configuration shown in FIG.
  • the effect of the connection detection phase is further increased.
  • the network topology detection system of the present embodiment can reduce the number of connection detection protocol packet transmissions by managing network topology detection system ports in a plurality of groups and performing connection detection for each group. The reason is that the network topology detection system of the present embodiment does not detect in the reverse direction, assuming that a bidirectional connection is possible if a one-way connection is detected between certain ports.
  • the way of allocating unconnected groups before detection is not limited to the way shown in step A1 and FIG. It is preferable that the storage unit 13 store the ports for which connection detection is performed in different groups as much as possible, and store the ports for which connection detection is not performed in the same group.
  • the topology management unit 11 transmits connection detection protocol packets to the two ports in a lump, and therefore the number of detections between the ports. This is because it cannot be reduced.
  • the storage unit 13 since the ports included in the same OFS are not connected, stores the ports included in the same OFS in the same connection undetected group.
  • the group is divided into four groups, but the number of groups is not necessarily four.
  • the topology management unit 11 may further divide the connection undetected A and the connection undetected B into two groups so as to be divided into different groups for each OFS. As a result, the number of detections can be further reduced. However, since the time required for the detection process increases as the number of groups increases, it is preferable to determine the number of groups in consideration of the time.
  • connection detection protocol used in the network topology detection system of this embodiment is assumed to be used as a unique protocol provided by the device developer.
  • OpenFlow a network in which only devices conforming to the same OpenFlow standard is generally configured, so that the topology of the entire network can be detected using the unique protocol.
  • the network topology detection system of the present embodiment can be used for networks other than networks using the open flow technology.
  • the Openflow device 10 may be a device that controls a switch, and is realized using a general server or the like.
  • the OFS 20 may be a switch that can switch the communication path.
  • FIG. 10 is a block diagram showing the configuration of the main part of the network topology detection system according to the present invention.
  • the network topology detection system according to the present invention includes, as main components, a plurality of switches 40 that mutually transmit and receive packets, and a control device 30 that controls the plurality of switches 40.
  • the control device 30 indicates a plurality of connection undetected groups that hold information indicating ports for which connections are not detected among the ports of the plurality of switches 40, and ports for which connections are detected among the ports of the plurality of switches 40.
  • Storage means 33 for storing a plurality of connection detection groups holding information, and connection detection protocol packets, which are packets for detecting the connection state between the plurality of switches 40, for each port belonging to the connection undetected group.
  • Topology management means 31 for transmitting to the network.
  • the topology management unit 31 receives the connection detection protocol packet from the second port belonging to the second connection undetected group after transmitting the connection detection protocol packet to the first port belonging to the first connection undetected group. In this case, the information indicating the first port and the information indicating the second port are moved to the connection detection group.
  • network topology detection systems shown in the following (1) to (4) are also disclosed.
  • a plurality of switches (for example, OFS 20) that transmit and receive packets to and from each other and a control device (for example, OpenFlow control device 10) that controls the plurality of switches.
  • a connection is detected among a plurality of connection undetected groups (for example, a group of connection undetected A, a group of connection undetected B) that holds information indicating ports for which connection is not detected, and a plurality of switch ports.
  • Storage means for example, the storage unit 13 for storing a plurality of connection detection groups (for example, a group of connection detection A and a group of connection detection B) that hold information indicating the connected ports, and ports belonging to the connection undetected group , A connection detection protocol packet that is a packet for detecting a connection state between the plurality of switches is transmitted for each group.
  • Topology management means for example, topology management unit 11
  • the topology management means is a first port (for example, OFS1 port 2) belonging to the first connection undetected group (for example, group of connection undetected A).
  • connection detection protocol packet When the connection detection protocol packet is received from the second port (for example, OFS2 port 1) belonging to the second connection undetected group (for example, the group of connection undetected B) after transmitting the connection detection protocol packet to A network topology detection system that moves information indicating the first port and information indicating the second port to a connection detection group.
  • the second port for example, OFS2 port 1
  • the second connection undetected group for example, the group of connection undetected B
  • the topology management means transmits a connection detection protocol packet to the first port (for example, OFS1 port 2) belonging to the first connection undetected group (for example, connection not detected A).
  • a second port for example, OFS2 port 1 belonging to the second connection undetected group (for example, connection not detected B)
  • information indicating the first port is displayed.
  • Move to a first connection detection group for example, connection detection A
  • move information indicating the second port to a second connection detection group for example, connection detection B
  • the first port By transmitting a connection detection protocol packet to the first port and receiving the connection detection protocol packet from the second port. It may be configured to verify that the connection between the second port is maintained.
  • the detected ports are distributed to different groups, so it can be considered that all connection maintenance confirmations have been made only by checking one group. .
  • the topology management means transmits a connection detection protocol packet to the first port (for example, OFS1 port 2), and the connection detection protocol from the second port (for example, OFS2 port 1). After a predetermined period in which the connection maintenance between the first port and the second port is confirmed by receiving a packet, the connection maintenance between the first port and the second port is performed again.
  • the connection between the first port and the second port is transmitted by transmitting a connection detection protocol packet to the second port and receiving the connection detection protocol packet from the first port. It may be configured to confirm maintenance.
  • the number of packet detections can be reduced even in a system in which a failure may occur only in one-way communication, such as when an optical cable is used for a network line.
  • a decrease in accuracy of connection maintenance confirmation can be suppressed.
  • ports of the same switch for example, OFS1, OFS2, OFS3, or OFS4 are stored in the same connection undetected group (for example, connection undetected A or connection undetected B). It may be configured as follows. According to such a network topology detection system, the number of connection detection protocol packet transmissions can be reduced more effectively.
  • the present invention can be applied to a network using OpenFlow, for example, and is not limited to OpenFlow, and can be applied to detection of a general network topology.
  • Topology management unit 10 OpenFlow control device 11 Topology management unit 12 Topology management table 13 Storage unit 20 OFS 21 Connection Detection Protocol Transmitting Unit 22 Connection Detection Protocol Receiving Unit 30 Control Device 31 Topology Management Unit 33 Storage Unit 40 Switch

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un système de détection de topologie de réseau qui est pourvu d'une pluralité de commutateurs (40) et d'un appareil de commande (30). L'appareil de commande (30) comprend : un moyen de stockage (33) qui stocke une pluralité de groupes à connexion non détectée et une pluralité de groupes à connexion détectée ; un moyen de gestion de topologie (31) qui transmet un paquet de protocole de détection de connexion à un port appartenant à chacun des groupes à connexion non détectée. Lorsque le moyen de gestion de topologie (31), après la transmission du paquet de protocole de détection de connexion à un premier port appartenant à un premier groupe à connexion non détectée, reçoit le paquet d'un second port appartenant à un second groupe à connexion non détectée, le moyen de gestion de topologie (31) amène des informations indiquant le premier port et des informations indiquant le second port à être décalées vers les groupes à connexion détectée.
PCT/JP2014/006140 2014-02-03 2014-12-09 Système, procédé et programme de détection de topologie de réseau, et appareil de commande Ceased WO2015114714A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014018185 2014-02-03
JP2014-018185 2014-02-03

Publications (1)

Publication Number Publication Date
WO2015114714A1 true WO2015114714A1 (fr) 2015-08-06

Family

ID=53756337

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/006140 Ceased WO2015114714A1 (fr) 2014-02-03 2014-12-09 Système, procédé et programme de détection de topologie de réseau, et appareil de commande

Country Status (1)

Country Link
WO (1) WO2015114714A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011080870A1 (fr) * 2009-12-28 2011-07-07 日本電気株式会社 Système de communications et procédé de collecte d'informations de ports
WO2011108205A1 (fr) * 2010-03-05 2011-09-09 日本電気株式会社 Système de communication, appareil de commande de voie, appareil d'acheminement de paquet et procédé de commande de voie
WO2013115177A1 (fr) * 2012-01-30 2013-08-08 日本電気株式会社 Système de réseau et procédé de gestion de topologie

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011080870A1 (fr) * 2009-12-28 2011-07-07 日本電気株式会社 Système de communications et procédé de collecte d'informations de ports
WO2011108205A1 (fr) * 2010-03-05 2011-09-09 日本電気株式会社 Système de communication, appareil de commande de voie, appareil d'acheminement de paquet et procédé de commande de voie
WO2013115177A1 (fr) * 2012-01-30 2013-08-08 日本電気株式会社 Système de réseau et procédé de gestion de topologie

Similar Documents

Publication Publication Date Title
US9059909B2 (en) System and method for configuration of link aggregation groups
US9455916B2 (en) Method and system for changing path and controller thereof
US9876698B2 (en) Interconnect congestion control in a storage grid
CN104468236B (zh) Sdn控制器集群、sdn交换机及其连接控制方法
EP2983342A2 (fr) Adressage par protocole internet de dispositifs de commande industriels utilisant la topologie de réseau en anneau
US10491504B2 (en) System for support in the event of intermittent connectivity, a corresponding local device and a corresponding cloud computing platform
CN105207971A (zh) 一种数据传输方法及装置
CN105591817B (zh) 一种协商模式处理方法及智能网络设备
CN104935614B (zh) 一种数据传输方法及装置
KR101576833B1 (ko) 이중화 장치에서 수신 버퍼를 이용한 통신 데이터의 중복 검사 방법
US20200235815A1 (en) Methods and sysems for reconfigurable network topologies
WO2015114714A1 (fr) Système, procédé et programme de détection de topologie de réseau, et appareil de commande
CN113328917B (zh) 用于epa链路诊断的方法、epa设备和计算机存储介质
CN103684888A (zh) 一种批量配置网络设备的方法
CN104618021B (zh) 一种基于光纤的数据传输方法、装置及系统
CN109067666B (zh) 一种报文传输的方法及装置
JP5212152B2 (ja) 通信システム
JP6062394B2 (ja) 中継装置および中継方法
CN106357429B (zh) 一种数据处理方法及系统
CN104113436B (zh) 双多路服务器监控方法、装置和系统
JP5922601B2 (ja) ネットワーク装置
JP6339438B2 (ja) 産業機器制御用ネットワークシステム
CN103457766A (zh) 一种堆叠分裂时管理设备的方法及装置
JP6162996B2 (ja) ネットワーク制御装置及び方法
KR101136401B1 (ko) 무손실 절체 가능한 플랜트 다중화 통신 시스템 및 그 방법

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14881148

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14881148

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP