WO2010125883A1 - Système de communication, dispositif d'émission, dispositif de réception, procédé d'émission, procédé de réception et programme - Google Patents

Système de communication, dispositif d'émission, dispositif de réception, procédé d'émission, procédé de réception et programme Download PDF

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Publication number
WO2010125883A1
WO2010125883A1 PCT/JP2010/055414 JP2010055414W WO2010125883A1 WO 2010125883 A1 WO2010125883 A1 WO 2010125883A1 JP 2010055414 W JP2010055414 W JP 2010055414W WO 2010125883 A1 WO2010125883 A1 WO 2010125883A1
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Prior art keywords
management frame
frame
links
management
unit
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PCT/JP2010/055414
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English (en)
Japanese (ja)
Inventor
珍龍 崔
宏之 都木
龍一 池松
正樹 厩橋
和男 高木
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日本電気株式会社
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Publication of WO2010125883A1 publication Critical patent/WO2010125883A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications

Definitions

  • the present invention relates to a communication system, a transmission device, a reception device, a transmission method, a reception method, and a program for transmitting and receiving a frame via a plurality of links constituting a link aggregation.
  • Ethernet registered trademark
  • SONET Synchronous Optical NETwork
  • Ethernet which was born as a LAN (Local Area Network) technology
  • operation and maintenance management functions such as fault management and performance measurement of the Ethernet network were insufficient.
  • standardization organizations such as IEEE and ITU-T have standardized OAM (Operation administration and maintenance) technology for operating and managing the Ethernet network at the layer (Layer 2) specified by Ethernet, and the content is IEEE802.1ag. And Y. 1731.
  • ITU-T Y.M. The OAM technology described in 1731 (Non-patent Document 1) can realize an operation and maintenance management function substantially equivalent to SONET on the Ethernet network.
  • a communication device that enables high-capacity traffic between communication devices in order to increase the switching processing capacity for transferring data to other communication devices and increase the communication speed between communication devices as the network speeds up It is necessary to realize a main pipe that connects the two.
  • link aggregation As a technology for realizing such a main pipe.
  • Link aggregation is a technology that aggregates multiple physical links stretched between two communication devices and treats them as if they were one logical link. Since the connection can be maintained by the physical link, there is a fault tolerance capability.
  • a physical link established between two communication devices is referred to as a link.
  • the OAM frame used for the operation and maintenance management of the network stipulated in 1731 is a frame for layer 2, and is transferred within the same band as the data frame for mainly transmitting data such as voice and images (in-band transfer). Therefore, a communication apparatus that terminates the OAM frame can perform processing for operation and maintenance management defined in the OAM frame only for the link through which the OAM frame passes.
  • Patent Document 1 describes a communication device for detecting a failure occurring in a part of a plurality of links constituting a link aggregation stretched between a first communication device and a second communication device. Yes.
  • the first communication device described in Patent Document 1 duplicates the management frames for network operation and maintenance management by the number of the plurality of links, and the duplicated management frames are transmitted through all of the plurality of links. Send to communication device.
  • the second communication device when there is a port that could not receive the management frame among the ports provided corresponding to the plurality of links, the second communication device indicates that a failure has occurred in the link corresponding to the port. To detect.
  • the second communication device displays an error message indicating that a failure has occurred in the link for all paths passing through the link established between the first communication device and the second communication device. Send.
  • a path is a route from the transmission source to the transmission destination of a frame, and is a route obtained by connecting links established between communication devices in the order in which the frame passes.
  • the communication device described in Patent Document 1 is configured for all paths that pass through one of the plurality of links even when a failure occurs in a part of the plurality of links that form the link aggregation. Send an error message.
  • Patent Document 1 has a problem that an error message is transmitted even to a path passing through a link in which no failure has occurred.
  • the transmission device of the present invention provides: A receiving device that receives a management frame used for network operation and maintenance management, and a transmission device that is connected via a plurality of links and transmits the management frame via the plurality of links, A determination unit for determining whether to copy the management frame; A replication unit that replicates the management frame determined to be replicated by the determination unit by the number of the plurality of links; The first management frame that is the management frame duplicated by the duplication unit is transmitted to the receiving apparatus via all of the plurality of links, and is the management frame that is judged not to be duplicated by the determination unit A transmission unit configured to transmit a second management frame to the reception device via an arbitrary link among the plurality of links.
  • the receiving apparatus of the present invention provides: A transmission device that transmits a management frame used for network operation and maintenance management, and a reception device that is connected via a plurality of links and that receives the management frame transmitted via the plurality of links;
  • the first management frame which is the management frame duplicated by the number of the plurality of links by the transmission device, is sent from all of the plurality of links to a plurality of ports provided corresponding to the plurality of links, respectively.
  • a receiving unit that receives the second management frame, which is the management frame that is not duplicated by the transmission device, via an arbitrary port among the plurality of ports, Port information indicating the port through which the second management frame has been received, received by the receiving unit, and a higher path that is set in the second management frame and is a path through which the second management frame is transmitted
  • a recording unit for recording fault information associated with a path A detection unit that detects a failure of the link based on a reception status of the first management frame; The upper path set in the second management frame that passes through the port corresponding to the link in which a failure is detected by the detection unit is extracted from the failure information recorded by the recording unit and extracted. And a processing unit that notifies the upper path that a failure has occurred in the link.
  • the transmission method of the present invention comprises: A transmission method applied to a transmission apparatus that is connected to a reception apparatus that receives a management frame used for network operation and maintenance management via a plurality of links and transmits the management frame via the plurality of links. And Determine whether to duplicate the management frame; Duplicating the management frame determined to be duplicated by the number of the plurality of links, The first management frame that is the duplicated management frame is transmitted to the receiving device via all of the plurality of links, and the second management frame that is the management frame that is determined not to be duplicated is It transmits to the said receiving device via arbitrary links among several links.
  • the receiving method of the present invention comprises: Applied to a transmitting device that transmits a management frame used for network operation and maintenance management, and a receiving device that is connected via a plurality of links and receives the management frame transmitted via the plurality of links.
  • a receiving method The first management frame, which is the management frame duplicated by the number of the plurality of links by the transmission device, is sent from all of the plurality of links to a plurality of ports provided corresponding to the plurality of links, respectively.
  • the second management frame that is the management frame that is not duplicated by the transmission device is received via any port of the plurality of ports, Associating port information indicating the port through which the received second management frame has passed with an upper path, which is a path through which the second management frame is transmitted, set in the second management frame. Record fault information, Detecting a failure of the link based on the reception status of the first management frame; The upper path set in the second management frame that passes through the port corresponding to the link in which the failure is detected is extracted from the recorded failure information, and the extracted upper path , Notify that a failure has occurred in the link.
  • the first program of the present invention provides: A receiving device that receives a management frame used for network operation and maintenance management, and a transmission device that is connected via a plurality of links and transmits the management frame via the plurality of links.
  • a determination procedure for determining whether to copy the management frame A duplication procedure for duplicating the management frame determined to be duplicated by the judgment procedure by the number of the plurality of links;
  • the first management frame, which is the management frame duplicated by the duplication procedure, is transmitted to the receiving apparatus via all of the plurality of links, and is the management frame that is judged not to be duplicated by the judgment procedure.
  • the second program of the present invention provides: A transmission device that transmits a management frame used for network operation and maintenance management, and a reception device that is connected via a plurality of links and that receives the management frame transmitted via the plurality of links.
  • the first management frame which is the management frame duplicated by the number of the plurality of links by the transmission device, is sent from all of the plurality of links to a plurality of ports provided corresponding to the plurality of links, respectively.
  • a recording procedure for recording failure information associated with a path A detection procedure for detecting a failure of the link based on a reception status of the first management frame;
  • the upper path set in the second management frame that passes through the port corresponding to the link in which a failure is detected by the detection procedure is extracted from the failure information recorded by the recording procedure and extracted. And a step of notifying the upper path that a failure has occurred in the link.
  • the transmission device duplicates the management frame by the number of the plurality of links and transmits the management frame as a first management frame to the reception device via the plurality of links, or the management frame itself is transmitted to the second frame.
  • a management frame is transmitted to a receiving apparatus via an arbitrary link.
  • the receiving device when receiving the second management frame, the receiving device receives the port from which the second management frame is received among the plurality of ports provided corresponding to the plurality of links, and the second management frame
  • the host path that is the route to be transmitted is recorded as link failure information.
  • the receiving device detects a link failure based on the reception status at the time of receiving the first management frame
  • the receiving device is set to the second management frame received at the port provided corresponding to the link. Informs the higher level path that the link has failed.
  • the receiving apparatus can identify the link in which the failure has occurred and notify that the failure has occurred in the link only to the upper path set in the management frame passing through the link.
  • FIG. 3 is a flowchart illustrating an example of the operation of the transmission device illustrated in FIG. 2.
  • 3 is a flowchart illustrating an example of an operation of the receiving device illustrated in FIG. 2.
  • FIG. 1 is a diagram for explaining an outline of network operation and maintenance management using an OAM frame described in Non-Patent Document 1.
  • devices 1 to 9 constituting Customer equipment, Operator A bigges, and Operator B bigiges each indicate a communication device.
  • a solid line connecting the communication devices with a triangle mark indicates a section (Maintenance Entity) in the network managed using the OAM frame.
  • a group of a plurality of communication devices connected by one solid line constitutes a group (MEG: Maintenance Group) in which communication devices managed using an OAM frame are grouped.
  • MAG Maintenance Group
  • a communication device marked with a triangle indicates a communication device (MEP: MEG End Point) that terminates the OAM frame in the MEG.
  • MEP MEG End Point
  • a communication device with a circle indicates a communication device (MIP: MEG Intermediate Point) that relays the OAM frame in the MEG.
  • MIP MEG Intermediate Point
  • the OAM frame uses the communication devices 1 to 9 as the MEG, and the communication device 1 that is the MEP changes to the communication device that is the MIP. 2 and 8, it is transmitted to the communication device 9 which is a MEP.
  • the ME level, MEG, MIP, and the like are set in each OAM frame by the administrator, and the processing specified in the OAM frame is performed on the set section and the communication device that performs termination processing.
  • FIG. 2 is a diagram illustrating an example of a configuration of a communication system according to an embodiment of the present invention.
  • the communication system includes a transmission device 10 that transmits an OAM frame and a data frame via a plurality of links that form a link aggregation, and reception that receives an OAM frame and a data frame transmitted from the transmission device 10.
  • Device 20 The communication system according to the present embodiment includes a transmission device 10 that transmits an OAM frame and a data frame via a plurality of links that form a link aggregation, and reception that receives an OAM frame and a data frame transmitted from the transmission device 10.
  • Device 20 is a transmission device 10 that transmits an OAM frame and a data frame via a plurality of links that form a link aggregation, and reception that receives an OAM frame and a data frame transmitted from the transmission device 10.
  • a single communication device may be configured to have both a block in the transmission device 10 and a block in the reception device 20.
  • the 2 includes a first port 11, a plurality of second ports 12, a frame analysis unit 13, an OAM processing unit 14, an OAM duplication unit 15, and a LAG function unit 16. Have.
  • the OAM duplicating unit 15 includes a determination unit 151 and a duplicating unit 152.
  • the LAG function unit 16 is an example of a transmission unit.
  • the first port 11 receives frames from other communication devices.
  • Each of the plurality of second ports 12 is provided corresponding to each of the plurality of links constituting the link aggregation, and transmits the OAM frame and the data frame to the receiving device 20 via the corresponding link.
  • the frame analysis unit 13 analyzes whether the frame received at the first port 11 is an OAM frame or a data frame.
  • FIG. 3 is a diagram illustrating an example of a frame format of the OAM frame.
  • Each OAM frame defines a process for managing and managing a network using the OAM frame, such as connectivity management, error notification, or measurement of relay band, frame loss, and bit error.
  • the type of OAM frame is divided according to the specified processing.
  • an OAM frame in which processing for constantly monitoring connectivity from the own device (MEP) to another MEP is defined as an ETH-CC (Ethernet Continuity Check) frame.
  • ETH-CC Ethernet Continuity Check
  • the frame format of this ETH-CC frame is shown in FIG. 3A.
  • an OAM frame in which processing for confirming the connectivity of bidirectional communication between the own device (MEP) and another MEP is defined is called an ETH-LB (Ethernet Loopback) frame.
  • the frame format of this ETH-LB frame is shown in FIG. 3B.
  • an OAM frame in which processing for confirming a path from its own device (MEP) to another MEP or MIP is defined is called an ETH-LT (Ethernet link trace) frame.
  • the frame format of this ETH-LT frame is shown in FIG. 3C.
  • Non-Patent Document 1 stipulates that in the OAM frame, “Ethernet Type” of the frame format shown in FIGS. 3A to 3C is set to [0x8902].
  • the frame analysis unit 13 analyzes whether it is an OAM frame or a data frame depending on whether the “Ethernet Type” of the frame received at the first port 11 is [0x8902].
  • 3A to 3C are diagrams illustrating examples of the frame format of the OAM frame, but the “Ethernet type” is also included in the data frame.
  • the frame analysis unit 13 outputs the OAM frame to the OAM processing unit 14.
  • the frame analysis unit 13 outputs the data frame to the LAG function unit 16.
  • the OAM processing unit 14 confirms an identifier indicating a target device that is a communication device that terminates the OAM frame output from the frame analysis unit 13.
  • the identifier indicating the target device includes the MAC address indicating the transmission destination communication device of the OAM frame set in “MACDA” of the frame format shown in FIGS. 3A to 3C, and the ETH-LT frame shown in FIG. 3C. There is a MAC address indicating the MEP of the OAM frame, which is set in “Target MAC Address”.
  • the OAM processing unit 14 terminates the OAM frame.
  • the OAM processing unit 14 outputs the OAM frame to the OAM duplication unit 15.
  • the OAM duplication unit 15 duplicates the OAM frame according to the type of the OAM frame.
  • the determination unit 151 determines whether to copy the OAM frame based on the type of the OAM frame output from the OAM processing unit 14.
  • examples of the OAM frame to be duplicated include an OAM frame for failure management such as an ETH-CC frame and an ETH-LB frame.
  • examples of the OAM frame that is not duplicated include an ETH-TEST (Ethernet test signal) frame that is transmitted to measure a relay band, a frame loss, and a bit error.
  • ETH-TEST Ethernet test signal
  • the reason why the ETH-TEST frame is not duplicated is that if the ETH-TEST frame is duplicated for each of a plurality of links constituting the link aggregation, the measurement load becomes high and an error may occur in the measurement result.
  • an ETH-TEST frame is given here as an example of an OAM frame that is not duplicated, the present invention is not limited to this, and an OAM frame that is not duplicated can be defined as necessary.
  • the duplicating unit 152 duplicates the OAM frames determined to be duplicated by the judging unit 151 by the number of the second ports 12.
  • the duplication unit 152 sets a flag indicating that the OAM frame is a duplicated frame, for example, in a Reserved area of a PDU (Protocol Data Unit) of the duplicated OAM frame.
  • PDU Protocol Data Unit
  • PDU refers to the part after “MEL” in the frame format shown in FIGS. 3A to 3C.
  • the OAM duplication unit 15 outputs the duplicated OAM frame to the LAG function unit 16.
  • the OAM duplicating unit 15 outputs the original OAM frame determined not to be duplicated by the judging unit 151 to the LAG function unit 16 as it is.
  • the LAG function unit 16 implements link aggregation with the receiving device 20 by the plurality of second ports 12.
  • the LAG function unit 16 performs link aggregation between the data frame output from the frame analysis unit 13 and the OAM frame output from the OAM duplication unit 15 via the plurality of second ports 12. It transmits to the receiving apparatus 20 via the some link which comprises.
  • the link through which the frame is transmitted depends on the implementation of the device manufacturer.
  • the LAG function unit 16 passes through all of the plurality of second ports 12 so that the OAM frame duplicated by the OAM duplication unit 15 is transmitted via all the links. Send to.
  • the LAG function unit 22 is an example of a reception unit
  • the OAM integration unit 25 is an example of a detection unit.
  • Each of the plurality of third ports 21 is provided corresponding to each of a plurality of links constituting the link aggregation, and receives a frame transmitted from the transmission device 10 via the link.
  • the LAG function unit 22 implements link aggregation with the transmission device 10 by the plurality of third ports 21.
  • the LAG function unit 22 receives frames transmitted from the transmission apparatus 10 via a plurality of third ports 21 via a plurality of links constituting the link aggregation.
  • the LAG function unit 22 outputs the data frame to the fourth port 27.
  • the LAG function unit 22 displays the OAM frame and port information indicating the third port 21 that has received the OAM frame. And output to the path OAM monitoring unit 23.
  • the path OAM monitoring unit 23 monitors the OAM frame output from the LAG function unit 22 and identifies the path set in the OAM frame and the third port 21 that has received the OAM frame.
  • the OAM frame that specifies the path set in the OAM frame by the path OAM monitoring unit 23 and the third port that has received the OAM frame has a plurality of communication devices connected to the path set in the OAM frame. It is an OAM frame that is a path that passes through and is an original OAM frame that is not duplicated by the transmission device 10.
  • an OAM frame in which the route set in the OAM frame is a path that passes through a plurality of communication devices is referred to as an inter-path OAM frame.
  • a path set in the inter-path OAM frame is referred to as an upper path.
  • the path set in the inter-path OAM frame is specified by specifying the upper path set in the inter-path OAM frame transmitted via the link between the transmitting apparatus 10 and the receiving apparatus 20. Because.
  • the third port 21 that has received the original OAM frame that has not been duplicated by the transmission device 10 is specified because the duplicated OAM frame is transmitted via all of the plurality of links that constitute the link aggregation.
  • the link through which the original OAM frame is transmitted can be specified.
  • a communication device Normally, a communication device only transmits an inter-path OAM frame to another communication device in the same manner as a data frame unless the own device is set to MEP.
  • the path OAM monitoring unit 23 specifies the information of the upper path set in the inter-path OAM frame and the port information of the third port 21 through which the inter-path OAM frame passes.
  • path OAM monitoring unit 23 specifies information on the upper path based on the ME level, MEG, MIP, and the like set in the inter-path OAM frame.
  • the ME level set for each OAM frame is set to “MEL” of the frame format shown in FIGS. 3A to 3C.
  • the MEG and MIP set for each OAM frame are set to “MEG ID (Maintenance Entity Group ID)” for identifying the MEG included in the frame format shown in FIG. 3A, for example.
  • MEG ID Maintenance Entity Group ID
  • VLAN ID Very Local Area Network ID
  • the path OAM monitoring unit 23 records, for each of the plurality of third ports 21, information on the upper path set in the inter-path OAM frame passing through the port as link failure information in the link failure information recording unit 24. To do.
  • FIG. 4 is a diagram showing an example of the configuration of link failure information recorded in the link failure information recording unit 24. As shown in FIG.
  • the path OAM monitoring unit 23 associates each port of the third port 21 with the information of the higher-order path set in the inter-path OAM frame passing through the port, Information is recorded in the link failure information recording unit 24 as information.
  • the path OAM monitoring unit 23 outputs the OAM frame output from the LAG function unit 22 and the port information indicating the third port 21 that has received the OAM frame to the OAM integration unit 25.
  • the OAM integration unit 25 receives one duplicated OAM frame received by each of the plurality of third ports 21. And the integrated OAM frame is output to the OAM processing unit 26.
  • Integration refers to outputting one OAM frame identical to the duplicated OAM frame for a plurality of duplicated OAM frames received at each of the plurality of third ports 21.
  • the OAM processing unit 26 indicates that a failure has occurred in the link constituting the link aggregation.
  • the OAM integration unit 25 notifies the OAM processing unit 26 of port information indicating the third port 21 that has not received the duplicated OAM frame.
  • the OAM integration unit 25 outputs the OAM frame to the OAM processing unit 26 as it is.
  • the OAM processing unit 26 confirms an identifier indicating the target device of the OAM frame output from the OAM integration unit 25. When the identifier indicating the target device of the OAM frame indicates the own device, the OAM processing unit 26 terminates the OAM frame.
  • the OAM processing unit 26 outputs the OAM frame to the fourth port 27 when the identifier indicating the target device of the OAM frame does not indicate the own device.
  • the OAM processing unit 26 generates an error message such as an alarm forwarding AIS (Alarm Indication Signal) frame for notifying that a failure has occurred, and sends the generated error message via the fourth port 27. To the extracted upper path.
  • AIS Alarm Indication Signal
  • the OAM processing unit 26 since the failure has occurred in the port “1” among the third ports 21, the OAM processing unit 26 performs the upper paths “MEG-1” and “MEG” that pass through the port “1”. -2 ”is extracted, and an error message is transmitted to the extracted higher-order path via the fourth port 27.
  • the fourth port 27 transmits the data frame output from the LAG function unit 22, the OAM frame output from the OAM processing unit 26, and an error message to other communication devices.
  • FIG. 5 is a flowchart showing an example of the operation of the transmission apparatus 10.
  • the first port 11 receives a frame from another communication device (step S501).
  • the frame analysis unit 13 analyzes whether the frame received at the first port 11 is an OAM frame or a data frame (step S502).
  • step S503 When the frame received at the first port 11 is an OAM frame (step S503: YES), the frame analysis unit 13 outputs the OAM frame to the OAM processing unit 14.
  • the OAM processing unit 14 determines whether to terminate the OAM frame based on whether the identifier indicating the target device of the OAM frame output from the frame analysis unit 13 indicates the own device (step S504).
  • step S504 When the identifier indicating the target device of the OAM frame indicates the own device and the OAM frame is terminated (step S504: YES), the OAM processing unit 14 terminates the OAM frame and returns to step S501.
  • step S504 the OAM processing unit 14 outputs the OAM frame to the OAM duplicating unit 15. .
  • the determination unit 151 determines whether to duplicate the OAM frame output from the OAM processing unit 14 (step S505).
  • step S505 determines that the OAM frame output from the OAM processing unit 14 is to be duplicated (step S505: YES)
  • the duplication unit 152 duplicates the OAM frame by the number of the second ports 12. (Step S506) A flag indicating that the OAM frame is a duplicated frame is set on the duplicated OAM frame.
  • the OAM duplicating unit 15 outputs the duplicated OAM frame to the LAG function unit 16.
  • step S505 determines that the OAM frame output from the OAM processing unit 14 is not replicated (step S505: NO).
  • the OAM replication unit 15 determines that the OAM frame output from the OAM processing unit 14 is The data is output to the LAG function unit 16 as it is.
  • the LAG function unit 16 transmits the OAM frame output from the OAM processing unit 14 to the reception device 20 via the plurality of second ports 12 and the links constituting the link aggregation (Ste S507).
  • step S503 when the frame received at the first port 11 is a data frame (step S503: NO), the frame analysis unit 13 outputs the data frame to the LAG function unit 16.
  • the LAG function unit 16 transmits the data frame output from the frame analysis unit 13 to the reception device 20 via the plurality of second ports 12 and the links constituting the link aggregation (Ste S507).
  • FIG. 6 is a flowchart showing an example of the operation of the receiving device 20.
  • the third port 21 receives a frame from the transmission device 10 (step S601).
  • the LAG function unit 22 analyzes whether the frame received at the third port 21 is an OAM frame or a data frame (step S602).
  • step S603 If the frame received at the third port 21 is a data frame (step S603: NO), the LAG function unit 22 transmits the data frame to another communication device via the fourth port 27. (Step S610).
  • step S603 when the frame received at the third port 21 is an OAM frame (step S603: YES), the LAG function unit 22 indicates the OAM frame and the port indicating the third port 21 that has received the OAM frame. Information is output to the path OAM monitoring unit 23.
  • the path OAM monitoring unit 23 checks whether a flag indicating that the frame is a duplicated frame is set in the OAM frame output from the LAG function unit 22.
  • the path OAM monitoring unit 23 determines that the OAM frame is between paths based on the ME level set to “MEL” of the OAM frame. Check if it is an OAM frame.
  • the path OAM monitoring unit 23 reports the port information of the third port 21 through which the inter-path OAM frame passes and the inter-path OAM frame. Is identified and recorded in the link failure information recording unit 24 as link failure information (step S604).
  • the path OAM monitoring unit 23 outputs the OAM frame output from the LAG function unit 22 and the port information indicating the third port 21 that has received the OAM frame to the OAM integration unit 25.
  • the OAM integration unit 25 integrates the duplicated OAM frame among the OAM frames output from the path OAM monitoring unit 23 (step S605), and the integrated OAM frame and the duplicated OAM frame are duplicated.
  • the original OAM frame that has not been received is output to the OAM processing unit 26.
  • the OAM integration unit 25 determines whether there is a third port 21 that has not received the duplicated OAM frame (step S606).
  • step S606 When there is no third port 21 that has not received the duplicated OAM frame (step S606: NO), the OAM processing unit 26 has an identifier indicating the target device of the OAM frame output from the OAM integration unit 25 as its own device. Whether or not the OAM frame is to be terminated is determined (step S607).
  • step S607 When the identifier indicating the target device of the OAM frame indicates the own device and the OAM frame is terminated (step S607: YES), the OAM processing unit 26 terminates the OAM frame and returns to step S601.
  • step S607 when the identifier indicating the target device of the OAM frame does not indicate the own device and the OAM frame is not terminated (step S607: NO), the OAM processing unit 26 transmits the OAM frame to the fourth port 27. Via the transmission to another communication device (step S610).
  • step S606 when there is the third port 21 that has not received the replicated OAM frame (step S606: YES), the OAM integration unit 25 determines that a failure has occurred in the link that constitutes the link aggregation, and the replicated OAM Port information indicating the third port 21 that has not received the frame is notified to the OAM processing unit 26.
  • the OAM processing unit 26 determines whether the port information notified from the OAM integration unit 25 as a path affected by the failed link.
  • the higher-order path set in the inter-path OAM frame passing through is extracted (step S608).
  • the OAM processing unit 26 generates an error message such as an AIS frame for alarm transfer (step S609), and transmits the generated error message to the extracted upper path via the fourth port 27 ( Step S610).
  • the transmitting apparatus 10 determines whether or not to duplicate the OAM frame by the number of the second ports 12 based on the type of the OAM frame, and determines the duplicated OAM frame or the original OAM frame.
  • the OAM frame is transmitted to the receiving device 20.
  • the receiving device 20 If the received OAM frame is an original OAM frame that has not been copied and is an inter-path OAM frame, the receiving device 20 includes port information of the third port 21 through which the inter-path OAM frame passes, Information on the upper path set in the inter-path OAM frame is recorded as link failure information. Then, when there is an OAM frame that has not been received by the third port 21 among the copied OAM frames, the receiving device 20 has not received the copied OAM frame based on the link failure information. 3 is notified to the upper path set in the inter-path OAM frame via the third port 21 that a failure has occurred in the link.
  • the transmission apparatus 10 performs replication according to the type of the OAM frame, the OAM frame can be replicated in consideration of the load on the reception apparatus 20 or the communication system.
  • the receiving device 20 can detect a failure that has occurred in the link that constitutes the link aggregation from the reception status of the copied OAM frame at the third port 21, and via the link in which the failure has occurred. It is possible to notify that a failure has occurred in the link only to the upper path set in the inter-path OAM frame.
  • the method performed by the transmission device and the reception device of the present invention may be applied to a program for causing a computer to execute.
  • the program can be stored in a storage medium and can be provided to the outside via a network.

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  • Computer Networks & Wireless Communication (AREA)
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  • Small-Scale Networks (AREA)

Abstract

L'invention porte sur un système de communication qui comporte un dispositif d'émission qui émet une trame de gestion, et un dispositif de réception qui reçoit la trame de gestion à travers une pluralité de liaisons, le dispositif d'émission comprenant une unité de détermination qui détermine si la trame de gestion devrait être dupliquée ou non, une unité de duplication qui duplique la trame de gestion pour le nombre de liaisons, et une unité d'émission qui émet la première trame de gestion dupliquée à travers la totalité des liaisons, et émet une seconde trame de gestion qui a été déterminée comme n'ayant pas été dupliquée sur une liaison arbitraire ; et le dispositif de réception comprend une unité de réception qui reçoit la première trame de gestion et la seconde trame de gestion à travers des ports correspondant aux liaisons, une unité d'enregistrement qui enregistre des informations de dysfonctionnement, dans lesquelles des informations des ports à travers lesquels la seconde trame de gestion est passée sont associées à un trajet qui est un passage à travers lequel la seconde trame de gestion doit être émise, et une unité de traitement qui extrait un trajet qui passe à travers le port correspondant à la liaison dans laquelle le dysfonctionnement est détecté à partir des informations de dysfonctionnement, et notifie l'occurrence du dysfonctionnement au trajet extrait.
PCT/JP2010/055414 2009-04-30 2010-03-26 Système de communication, dispositif d'émission, dispositif de réception, procédé d'émission, procédé de réception et programme WO2010125883A1 (fr)

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JP2009110810 2009-04-30

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012089955A (ja) * 2010-10-15 2012-05-10 Fujitsu Ltd 監視プログラム、監視装置、および監視方法
JP2012129868A (ja) * 2010-12-16 2012-07-05 Nec Corp 通信システム
JP2013211680A (ja) * 2012-03-30 2013-10-10 Fujitsu Ltd 通信装置
JP2015002413A (ja) * 2013-06-14 2015-01-05 富士通テレコムネットワークス株式会社 フレーム伝送装置および正常性確認方法
WO2016017206A1 (fr) * 2014-07-28 2016-02-04 日本電気株式会社 Dispositif de communication, procede de communication, programme et systeme de communication

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005020492A (ja) * 2003-06-27 2005-01-20 Hitachi Ltd ネットワーク中継装置
JP2008131615A (ja) * 2006-11-27 2008-06-05 Kddi Corp リンクアグリゲーション用の通信装置及びプログラム
JP2008131614A (ja) * 2006-11-27 2008-06-05 Kddi Corp 運用保守管理フレームを処理する通信装置、データ構造及びプログラム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005020492A (ja) * 2003-06-27 2005-01-20 Hitachi Ltd ネットワーク中継装置
JP2008131615A (ja) * 2006-11-27 2008-06-05 Kddi Corp リンクアグリゲーション用の通信装置及びプログラム
JP2008131614A (ja) * 2006-11-27 2008-06-05 Kddi Corp 運用保守管理フレームを処理する通信装置、データ構造及びプログラム

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012089955A (ja) * 2010-10-15 2012-05-10 Fujitsu Ltd 監視プログラム、監視装置、および監視方法
JP2012129868A (ja) * 2010-12-16 2012-07-05 Nec Corp 通信システム
US9240935B2 (en) 2010-12-16 2016-01-19 Nec Corporation Communication system
JP2013211680A (ja) * 2012-03-30 2013-10-10 Fujitsu Ltd 通信装置
JP2015002413A (ja) * 2013-06-14 2015-01-05 富士通テレコムネットワークス株式会社 フレーム伝送装置および正常性確認方法
WO2016017206A1 (fr) * 2014-07-28 2016-02-04 日本電気株式会社 Dispositif de communication, procede de communication, programme et systeme de communication

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