JP5111656B2 - Communication network system, autonomous monitoring data communication method of communication network system and communication device - Google Patents

Description

  The present invention relates to a communication network system, an autonomous monitoring data communication method for the communication network system, and a communication apparatus therefor.

  In a communication system comprising a management device and a transmission device, when the management device performs remote control of the transmission device, the transmission device performs processing such as block setting or configuration change, and then performs connection confirmation processing with the management device. A communication system is known that executes and cancels processing such as blocking setting and configuration change if normal connection cannot be confirmed.

  This communication system is a communication system capable of avoiding a state in which the management device cannot perform remote control on the transmission device, that is, a state in which remote control is not possible. In addition, it is known that when the connection with the management apparatus cannot be confirmed and the control channel is restored, the management apparatus is notified of the restoration completion. That is, there has been proposed a communication system in which the management apparatus can know that the configuration change control for the transmission apparatus has failed.

  Such a communication system transmits a connection confirmation request to the connection transmission apparatus after performing control based on the remote control information from the management apparatus received via the connection transmission apparatus. Then, a connection confirmation response is received as a response to the connection confirmation request, and a remote control completion notification is transmitted to the management device when the normal connection is confirmed. On the other hand, if the control channel is blocked and a connection confirmation response cannot be received even after a certain period of time, remote transmission is performed to restore the control channel and send a restoration completion notification to the management device when the control channel is restored Equipment.

The above-described communication system and the like that can avoid the remote control impossible state even when the in-band monitoring control method is adopted is disclosed in, for example, Patent Document 1 below.
JP 2003-234743 A

  In the in-band monitoring method, the communication device transmits monitoring information to the monitoring device by using, for example, a communication port for a user and a line without using a monitoring port dedicated for monitoring. For this reason, if there is a communication port blockage or the like or a communication failure in a line interface unit that transmits monitoring information, typically a communication port that transmits monitoring information, or the like, transmission of monitoring information becomes impossible.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a communication device and the like that can perform notification processing more reliably when a notification event to a monitoring device occurs.

  A communication network system according to the present invention includes a communication device including a line interface unit and a CPU for controlling the line interface unit, and monitoring for controlling the communication device via a communication network line connected to a communication port of the line interface unit. In a communication network system comprising a control device, when the communication device transmits start-up information of the communication device to the monitoring control device via the communication network line, the presence or absence of a communication failure in the communication port is detected. If there is a communication failure in the communication port, the startup startup information is sent to the monitoring and control device after waiting for a predetermined time. If there is no communication failure in the communication port, the startup startup is started without waiting for the predetermined time. The raising information is transmitted to the monitoring control device.

  In the communication network system according to the present invention, preferably, when the communication device transmits start-up information of the communication device to the monitoring control device via the communication network line, the line interface unit and the monitoring control device If there is a communication failure between the line interface unit and the supervisory control device, the startup startup information is sent to the supervisory control device after waiting for a predetermined time. When there is no communication failure between the unit and the monitoring control device, the startup startup information is transmitted to the monitoring control device without waiting for a predetermined time.

  In the communication network system according to the present invention, more preferably, the startup information of the communication device transmitted from the communication device to the monitoring control device via the communication network line may be startup information of the line interface unit. Good.

  In the communication network system according to the present invention, more preferably, the start-up information of the communication apparatus transmitted from the communication apparatus to the monitoring control apparatus via the communication network line may be port state information of the communication apparatus.

  In the communication network system according to the present invention, more preferably, the communication device includes a redundantly configured line interface unit, and the communication device startup start-up information transmitted from the communication device to the monitoring control device via the communication network line. May be line interface unit switching information.

  The communication network system according to the present invention preferably further includes a communication port in which the line interface unit is configured redundantly, and the communication apparatus start-up information transmitted from the communication apparatus to the monitoring control apparatus via the communication network line is Communication port switching information may also be used.

  The communication network system according to the present invention preferably further includes a redundantly configured communication device, and the communication device start-up information transmitted from the communication device to the monitoring control device via the communication network line is stored in the communication device. It may be switching information.

  In addition, an autonomous monitoring data communication method for a communication network system according to the present invention includes a communication device including a line interface unit and a CPU for controlling the line interface unit, and a communication network line connected to a communication port of the line interface unit. In the autonomous monitoring data communication method of a communication network system comprising a monitoring control device that monitors and controls the communication device, the communication device transmits start-up information of the communication device to the monitoring control device via the communication network line In addition, a temporary storage process for temporarily storing startup information of the communication device, a communication port fault presence / absence detection process for detecting the presence / absence of a communication failure in the communication port, and a communication port fault presence / absence detection process are detected. If this happens, wait for a predetermined time If a communication failure of the communication port is not detected in the retry step for transmitting the startup startup information temporarily stored in the temporary storage step to the monitoring control device and the communication port failure presence / absence detection step, do not wait for a predetermined time. And a transmission step of transmitting the startup startup information temporarily stored in the temporary storage step to the monitoring control device.

  Further, the autonomous monitoring data communication method of the communication network system according to the present invention is preferably such that when the communication device transmits start-up information of the communication device to the monitoring control device via the communication network line. A temporary storage step for temporarily storing startup startup information, a communication port failure presence / absence detection step for detecting presence / absence of a communication failure between the line interface unit and the monitoring control device, and a communication port failure presence / absence detection step; When a communication failure with the monitoring and control device is detected, the line interface unit and the retry step for transmitting the startup startup information to the monitoring and control device after waiting for a predetermined time, and the communication port failure detection step If a communication failure with the monitoring and control device is not detected, it will start without waiting for a predetermined time. And a sending step of sending a start-up information to the monitoring control unit.

  Further, in the autonomous monitoring data communication method of the communication network system according to the present invention, it is more preferable that the start-up information of the communication device transmitted from the communication device to the monitoring control device via the communication network line is the line interface unit. Startup information may also be used.

  Further, in the autonomous monitoring data communication method of the communication network system according to the present invention, more preferably, the start-up information of the communication device transmitted from the communication device to the monitoring control device via the communication network line is port state information of the communication device. It may be.

  The autonomous monitoring data communication method of the communication network system according to the present invention is more preferably a communication device including a line interface unit in which the communication device is configured redundantly, and the communication device transmits to the monitoring control device via the communication network line. The startup startup information may be line interface unit switching information.

  Further, the autonomous monitoring data communication method of the communication network system according to the present invention is more preferably a communication device comprising a communication port in which the line interface unit is configured redundantly, and the communication device transmits to the monitoring control device via the communication network line. May be communication port switching information.

  The autonomous monitoring data communication method of the communication network system according to the present invention is more preferably a communication device that includes a communication device in which the communication network system is redundantly configured, and the communication device transmits to the monitoring control device via the communication network line. The start-up information may be communication device switching information.

  According to another aspect of the present invention, there is provided a communication apparatus including a line interface unit and a CPU for controlling the line interface unit, and monitoring and controlling the communication apparatus via a communication network line connected to a communication port of the line interface unit. When the communication device startup / startup information is transmitted to the monitoring control device via the communication network line connected to the monitoring control device, the communication device detects whether there is a communication failure in the communication port, and communicates with the communication port. If there is a failure, the startup startup information is sent to the monitoring controller after waiting for a predetermined time. If there is no communication failure of the communication port, the startup startup information is monitored without waiting for the predetermined time. It transmits to a control apparatus, It is characterized by the above-mentioned.

  Further, the communication device according to the present invention is preferably configured such that when the communication device startup start information is transmitted to the monitoring control device via the communication network line, the communication device is connected between the line interface unit and the monitoring control device. If there is a communication failure between the line interface unit and the monitoring and control device, the startup information is transmitted to the monitoring and control device after waiting for a predetermined time, and the line interface unit When there is no communication failure between the monitoring control device and the monitoring control device, startup startup information is transmitted to the monitoring control device without waiting for a predetermined time.

  In the communication device according to the present invention, more preferably, the startup information of the communication device transmitted to the monitoring control device via the communication network line may be startup information of the line interface unit.

  In the communication apparatus according to the present invention, more preferably, the start-up information of the communication apparatus transmitted to the monitoring control apparatus via the communication network line may be port state information of the communication apparatus.

  The communication apparatus according to the present invention preferably further includes a redundantly configured line interface unit, and the communication apparatus start-up information transmitted from the communication apparatus to the monitoring control apparatus via the communication network line is the line interface unit. Switching information may be used.

  Further, the communication device according to the present invention preferably includes a communication port in which the line interface unit is configured redundantly, and the startup start information of the communication device that the communication device transmits to the monitoring control device via the communication network line is: It may be communication port switching information.

  Further, the communication device according to the present invention is more preferably configured so that the communication device is redundantly configured, and the communication device start-up information transmitted from the communication device to the monitoring control device via the communication network line is the switching of the communication device. It may be information.

  It is possible to provide a communication device or the like that can reliably perform notification processing when a notification event to the monitoring control device occurs.

1 is a conceptual diagram illustrating an in-band monitoring communication network system according to an embodiment. It is a block diagram explaining the structural example of the communication apparatus concerning 1st embodiment. It is a flowchart explaining the outline | summary of operation | movement and a process of the communication apparatus concerning 1st embodiment. It is a block diagram explaining the structural example of the communication apparatus concerning 2nd embodiment. It is a flowchart explaining the outline | summary of operation | movement and a process of the communication apparatus concerning 2nd embodiment. It is a conceptual diagram explaining the communication network system of an out-band monitoring system. It is a figure which shows the general view of the structural example of the layer 2 switch apparatus which is an application object of this invention. It is a conceptual diagram which shows the structural example inside a layer 2 switch apparatus. It is a figure showing an example of failure occurrence. It is a figure showing an example of failure occurrence. It is a figure which shows the hardware constitutions of another L2 switch. It is a conceptual diagram which shows the functional block of a frame relay process part. It is a flowchart explaining the outline | summary of the operation | movement process of L2 switch. It is a conceptual block diagram which shows the structure of a communication network provided with two communication paths including L2 switch and L3 switch. It is a conceptual diagram explaining a frame format.

Explanation of symbols

  100..Communication network system, 110..Monitoring control device, 120..Communication network line, 130..Communication device, 131..CPU, 132..Line interface unit, 132P..Communication port.

  In the communication device described in the embodiment, the communication device that is monitored and controlled by the in-band monitoring method autonomously performs “Syslog” or “SNMP Trap” with respect to the monitoring control device independently of the control from the monitoring control device. Etc. (also referred to as autonomous monitoring data).

  “Syslog” is a system log that is a standard for transferring log messages over an IP network. In addition, a communication network system using an SNMP (Simple Network Management Protocol) network includes a network management device (also referred to as NMS) having an SNMP manager function and a monitoring target device (Network Element: NE) having an SNMP agent function. It is comprised from.

  The network management device is, for example, a monitoring control device of a communication network system, and the monitoring target device is, for example, a communication device of a communication network system. The NE can detect status change and event occurrence information such as occurrence of port blockage or device communication failure, recovery from failure, and the like. Further, the NE notifies the NMS of the detected state change and event occurrence information using an SNMP trap command (also referred to as asynchronous interrupt notification: TRAP).

  Since the communication apparatus described in the embodiment is an in-band monitoring system, autonomous monitoring data is transmitted to the monitoring control apparatus using a so-called user line port. In addition, the communication device checks whether there is an abnormality in the user line port before transmitting the autonomous monitoring data to the monitoring control device. In addition, the communication device checks whether there is an abnormality in the communication network line between the user line port and the monitoring control device before transmitting the autonomous monitoring data to the monitoring control device.

  In addition, if there is an abnormality in the communication line between the user line port or the user line port and the monitoring control apparatus, the communication apparatus is autonomous monitoring data for a predetermined time of about several seconds (for example, 1-2 seconds). Wait for transmission. In addition, after the communication apparatus waits for transmission for a predetermined time, if the abnormality of the user line port is solved, the communication apparatus executes transmission processing of autonomous monitoring data. As a result, the communication device can reliably transmit the autonomous monitoring data to the monitoring control device.

  FIG. 1 is a conceptual diagram illustrating an in-band monitoring communication network system 100 according to an embodiment. In the in-band monitoring communication network system 100, a monitoring control device (OPS: Operation System) 110 monitors a communication device 130 via a communication network line (also referred to as a user network) 120 serving as a so-called user line.

  The communication device 130 controls n (n is an arbitrary natural number) line interface units 132 (1),..., 132 (n) (hereinafter, appropriately referred to as line interface units 132) and the line interface units 132. CPU131.

  The line interface unit 132 includes communication ports 132P (1),... 132P (n) (hereinafter referred to as communication ports 132P as appropriate). The CPU 131 includes a monitoring port 131P. The communication network line 120 is connected to the communication port 132P of the line interface unit 132.

  1 shows an example in which the communication network line 120 is connected only to the communication port 132P (n) of the line interface unit 132 (n) for the sake of simplicity of explanation, the communication network line 120 may be any one or You may connect to the communication port 132P of the some line interface unit 132. FIG. Further, the communication device 130 transmits autonomous monitoring data to the monitoring control device 110 from the communication port 132P via the communication network line 120. Note that the communication device 130 may be configured redundantly, and the communication port 132P may also be configured redundantly.

  On the other hand, in the communication network system 100 (2) illustrated in FIG. 6, the monitoring control device 110 monitors the communication device 130 via the dedicated monitoring control network 140. FIG. 6 is a conceptual diagram illustrating an out-of-band monitoring communication network system 100 (2). In FIG. 6, the same portions as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted here in order to avoid duplication of description.

  In the out-band monitoring communication network system 100 (2), the monitoring control device 110 performs monitoring control using a monitoring port 131 </ b> P dedicated to monitoring control bundled with the CPU 131 included in the communication device 130. The CPU 131 may include a monitoring control unit that monitors and controls the line interface unit 132, and the monitoring port 131P may be provided in the monitoring control unit.

  The communication network system 100 (2) performs monitoring control using the monitoring control network 140, which is a dedicated monitoring control network, using the monitoring port 131P dedicated to monitoring in the communication device 130. Not affected. For this reason, the communication network system 100 (2) has an advantage that stable monitoring control is possible.

  However, it is necessary to provide the monitoring control network 140 separately from the communication network line 120, and the cost of the monitoring control network 140 increases as the number of communication devices 130 included in the communication network system 100 (2) increases. In this respect, the in-band monitoring communication network system 100 that performs monitoring control using the user network 120 is advantageous in terms of cost because it is not necessary to provide the monitoring control network 140.

  In the in-band monitoring communication network system 100, the autonomous monitoring data notified autonomously from the communication device 130 to the monitoring control device 110 includes, for example, the following.

(1a) Information notifying completion of activation of the communication device 130,
(2a) Information for notifying the start-up completion of a line interface unit (also referred to as a line card) 132 (n) that accommodates a communication port 132P (n) that is a user line port;
(3a) Information for notifying the failure state of the line interface unit 132 and the recovery from the blocked state of the communication port 132P,
(4a) Line interface unit 132 Information for notifying switching of the line interface unit 132 in the redundant configuration,
(5a) Information for notifying communication port 132P switching in the communication port 132P redundant configuration;
(6a) Information for notifying switching of the communication device 130 in the redundant configuration of the communication device 130.

  In addition, the CPU 131 of the communication device 130 autonomously monitors the above-described autonomous monitoring information notification factors (1a) to (6a), and includes any one or more of the autonomous monitoring information items (1a) to (6a). It is preferable to notify the monitoring control device 110 immediately when a notification factor occurs.

  In this case, since the out-of-band monitoring communication network system 100 (2) uses the dedicated monitoring port 131P tied to the monitoring control unit 110, as long as the monitoring function of the CPU 131 is operating (1a ) To (6a), it is possible to transmit information of one or a plurality of autonomous monitoring data.

  However, in the in-band monitoring communication network system 100, even if the monitoring function of the CPU 131 is operating, if the line interface unit 132 (n) or the notification port 132P (n) is not normal, the autonomous monitoring data Can not be notified. For this reason, in the communication network system 100, when any one or a plurality of autonomous monitoring information notification factors (1a) to (6a) occurs, corresponding to (1a) to (6a), It seems that the problems (1b) to (6b) occur.

  (1b) When the start-up of the monitoring control unit (not shown) of the CPU 131, particularly the CPU 131, is completed, the CPU 131 can monitor and control the communication device 130. For this reason, the communication device 130 attempts to notify the monitoring control device 110 when the start-up of the monitoring control unit (not shown) is completed, but the line interface responsible for communication with the monitoring control device 110 for in-band monitoring control. If the start-up of the unit 132 (n) or the notification port 132P (n) is not completed, the communication device 130 cannot be notified. When the notification cannot be made, the communication device 130 discards the notification event (typically, the autonomous monitoring data that was scheduled to be notified).

  (2b) When the startup of the line interface unit 132 (n) is completed, the communication device 130 performs a process of trying to notify the monitoring control device 110 at that time. However, since the communication port 132P (n) responsible for in-band monitoring is a port in the line interface unit 132 (n) immediately after the start-up is completed, even if the start-up of the line interface unit 132 (n) is completed, the communication port It is assumed that 132P (n) has not been started up. In this case, the communication device 130 cannot notify the monitoring control device 110 from the communication port 132P (n) that has not been started up. When the notification cannot be made, the communication device 130 discards the notification event (typically, the autonomous monitoring data that was scheduled to be notified).

  (3b) When the failure state of the line interface unit 132 or the port blocking state of the communication port 132P is released and the communication is restored, the communication device 130 attempts to notify the monitoring control device 110 of the restoration information at the time of the restoration. However, when the communication port 132P responsible for in-band monitoring is the communication port 132P (n) in the line interface unit 132 (n) that has been recovered from failure, or is a recovery port that has been released from the blocked state. It is assumed that the communication port 132P (n) is not ready for notification. In this case, the communication device 130 cannot notify the monitoring control device 110 of autonomous monitoring data. When the notification cannot be made, the communication device 130 discards the notification event (typically, the autonomous monitoring data that was scheduled to be notified).

  (4b) When the line interface unit 132 has a redundant configuration, when the line interface unit 132 is switched, the communication device 130 notifies the monitoring control device 110 of the switching information of the line interface unit 132. However, when the communication port 132P responsible for in-band monitoring is the communication port 132P (n) in the line interface unit 132 (n) to be switched, the communication port 132P (n) is not in a state that can be notified. Is assumed. In this case, the communication device 130 cannot notify the monitoring control device 110 of autonomous monitoring data. When the notification cannot be made, the communication device 130 discards the notification event (typically, the autonomous monitoring data that was scheduled to be notified).

  (5b) When the communication port 132P has a redundant configuration, when the communication port 132P is switched, the communication device 130 notifies the monitoring control device 110 of the switching of the communication port 132P. However, when the communication port 132P responsible for in-band monitoring is a port to be switched, it is assumed that the communication port 132P is not ready for notification. In this case, the communication device 130 cannot notify the monitoring control device 110 of autonomous monitoring data. When the notification cannot be made, the communication device 130 discards the notification event (typically, the autonomous monitoring data that was scheduled to be notified).

  (6b) When the communication device 130 has a redundant configuration, when the communication device 130 is switched, the communication device 130 notifies the monitoring control device 110 of the switching of the communication device 130. However, it is assumed that the communication port 132P that performs in-band monitoring is not in a communicable state as the communication device 130 is switched. In this case, the communication device 130 cannot notify the monitoring control device 110 of autonomous monitoring data. When the notification cannot be made, the communication device 130 discards the notification event (typically, the autonomous monitoring data that was scheduled to be notified).

  In order to deal with the above concerns (1b) to (6b), the communication device 130 of the communication network system 100 typically uses the following two methods.

  One is to confirm the link state of the communication port 132P (n) responsible for in-band monitoring before the communication device 130 notifies the monitoring control device 110 of autonomous monitoring data. If the communication port 132P (n) responsible for in-band monitoring is in the LinkUP state (so-called Link is established), the communication device 130 notifies the monitoring control device 110 of autonomous monitoring data.

  If the communication port 132P (n) responsible for in-band monitoring is not in the LinkUP state (so-called Link established state), the communication device 130 notifies the monitoring control device 110 of autonomous monitoring data after a predetermined time has elapsed. To do. That is, if not in the LinkUP state, the communication device 130 waits for a predetermined time, and then notifies the monitoring control device 110 of autonomous monitoring data. The predetermined time can be set to, for example, about 1 second determined in advance.

  As a result, the communication device 130 typically confirms the link establishment state with other adjacent communication devices, monitoring control devices, etc. on the communication network directly linked to the communication device 130, and then the autonomous monitoring data. Can be sent.

  The other is that before the communication device 130 notifies the monitoring control device 110 of the autonomous monitoring data, an “ARP frame” is sent from the communication port 132P (n) that performs in-band monitoring to the monitoring control device 110. Send. If there is a response to the transmitted “ARP frame”, the communication device 130 notifies the monitoring control device 110 of the autonomous monitoring data. The “ARP frame” is a frame according to ARP (Address Resolution Protocol) which is a TCP / IP protocol for linking an IP address and a MAC address.

  If there is no response to the transmitted “ARP frame”, the communication device 130 notifies the monitoring control device 110 of autonomous monitoring data after a predetermined time has elapsed. That is, if there is no response response to the transmitted “ARP frame”, the communication device 130 waits for a predetermined time and then notifies the monitoring control device 110 of autonomous monitoring data. The predetermined time can be set to, for example, about 1 second determined in advance.

  As a result, the communication device 130 typically checks whether or not there is a response to the “ARP frame”, and typically whether or not a loop line has been established, and then transmits the autonomous monitoring data. can do. Here, the loop line refers to a regression line that can return a transmitted signal to a signal destination via at least one closed optical line path for a desired signal transmission. means. For example, if a communication failure occurs somewhere on the loop line, the transmitted signal cannot return to the destination unless there is another bypass route that complements the route that caused the communication failure. Therefore, the loop line is not established.

(First embodiment)
An outline of the configuration of the communication apparatus 130 according to the first embodiment will be described with reference to a block diagram. FIG. 2 is a block diagram illustrating a configuration example of the communication device 130 (2) according to the embodiment. In FIG. 2, the communication device 130 (2) includes a monitoring control unit 131 (2) included in the CPU 131 and an autonomous monitoring data collection unit 212 that collects autonomous monitoring data.

  The autonomous monitoring data collection unit 212 includes autonomous monitoring data collection units 212 (1) to 212 (6) corresponding to each individual dedicated to the autonomous monitoring data to be collected, for example, (1a) to (6a) described above. However, in FIG. 2, for convenience of explanation, the single autonomous monitoring data collection unit 212 is illustrated.

  The communication device 130 (2) also includes an autonomous monitoring data storage unit 213 that temporarily stores the autonomous monitoring data collected by the autonomous monitoring data collection unit 212. In addition, the communication device 130 (2) includes a communication port normality determination unit 214 that determines the normality of the communication port 132P (n) responsible for transmission of autonomous monitoring data in the in-band monitoring method.

  In addition, when the communication port normality determination unit 214 determines that the communication port 132P (n) is not normal, the communication device 130 (2) waits for a predetermined time, and then returns to the communication port normality determination unit 214 again. A retry unit 215 for determining whether or not the communication port 132P (n) is normal is provided.

  The retry unit 215 counts a predetermined time each time until the number of retries that causes the communication port normality determination unit 214 to determine whether or not the communication port 132P (n) is normal exceeds a predetermined set number n. And However, if the communication port normality determination unit 214 determines that the communication port 132P (n) is normal during the retry, the communication device 130 (2) performs communication processing of autonomous monitoring data.

  Further, the communication device 130 (2) includes an autonomous monitoring data transmission unit 216 serving as a driver that causes the hardware unit 220 of the communication device 130 (2) to perform transmission processing. The monitoring control unit 131 (2), the autonomous monitoring data collection unit 212, the autonomous monitoring data storage unit 213, the communication port normality determination unit 214, the retry unit 215, and the autonomous monitoring data transmission unit 216 are each programmed. The software unit 210 may be provided for processing.

  The monitoring control unit 131 (2) instructs the autonomous monitoring data collection unit 212 to collect autonomous monitoring data, and temporarily stores the collected autonomous monitoring data in the autonomous monitoring data storage unit 213.

  In addition, the monitoring control unit 131 (2) indicates to the communication port normality determination unit 214 that the communication port 132P (n) is normal before transmitting the collected autonomous monitoring data to the monitoring control device 110 (2). Confirm whether or not.

  If the communication port 132P (n) is normal, the monitoring control unit 131 (2) transmits the autonomous monitoring data temporarily stored in the autonomous monitoring data transmission unit 216 to the communication port 132P ( n) to perform transmission processing.

  If the communication port 132P (n) is not normal, the monitoring controller 131 (2) causes the retry unit 215 to count up for a predetermined time and wait. The retry unit 215 increments the standby count for a predetermined time, and then causes the communication port normality determination unit 214 to confirm and determine again whether or not the communication port 132P (n) is normal.

  While the communication port 132P (n) is not normal, the retry unit 215 makes the communication port normality determination unit 214 check and determine whether or not the communication port 132P (n) is normal. It shall be repeatedly confirmed and judged until the number of times is reached.

  If the communication port normality determination unit 214 determines that the communication port 132P (n) is normal in an iterative process (which may be referred to as a retry process), the monitoring control unit 131 (2) transmits autonomous monitoring data. The unit 216 transmits the autonomous monitoring data temporarily stored in the autonomous monitoring data storage unit 213 via the communication port 132P (n). For this reason, the retry unit 215 may include a timer, a predetermined time storage unit that stores a predetermined time in advance, and a predetermined number storage unit that stores a predetermined number of times (the upper limit of the number of retry times described above). .

  The hardware unit 220 of the communication device 130 (2) includes a buffer memory 221 serving as a transmission buffer and a communication port 132P (n) serving as a line I / F. The communication port 132P (n) (n is an arbitrary natural number) is a port that is communicably connected to the monitoring control device 110 (2) via the communication network line 120 that is a user network as described above.

  Next, the operation and processing of the communication device 130 (2) will be described with reference to FIG. FIG. 3 is a flowchart for explaining the outline of the operation and processing of the communication device 130 (2). Therefore, the operation and processing of the communication device 130 (2) will be described below based on the steps shown in FIG.

(Step S310)
The monitoring control unit 131 (2) monitors the autonomous monitoring data collected by the autonomous monitoring data collection unit 212, and whether or not autonomous monitoring data (or a notification factor) to be notified to the monitoring control device 110 (2) has occurred. Determine whether. If a factor for notifying the autonomous monitoring data is generated, the process proceeds to step S320. If no factor for notifying the autonomous monitoring data has occurred, the process waits in step S310. Note that the monitoring control unit 131 (2) temporarily stores the autonomous monitoring data collected by the autonomous monitoring data collection unit 212 in the autonomous monitoring data storage unit 213.

(Step S320)
The monitoring control unit 131 (2) determines whether the communication port 132P (n) used when notifying the monitoring control device 110 (2) is not in a port closed state but in an outputable (that is, usable) state. Is determined by the communication port normality determination unit 214. If the communication port 132P (n) is ready to output, the process proceeds to step S330. If the communication port 132P (n) is not ready for output, the process proceeds to step S340.

(Step S330)
The monitoring control unit 131 (2) causes the autonomous monitoring data transmission unit 216 to perform autonomous monitoring data transmission processing. Upon receiving the instruction from the monitoring control unit 131 (2), the autonomous monitoring data transmission unit 216 sends the autonomous monitoring data temporarily stored in the autonomous monitoring data storage unit 213 to the hardware unit 220 as the communication port 132P. A process of transmitting from (n) to the supervisory control device 110 (2) is performed.

(Step S340)
The monitoring control unit 131 (2) causes the retry unit 215 to count up the standby time for a predetermined time. The retry unit 215 may include a predetermined time storage unit (not shown) that stores a predetermined time, and a timer (not shown).

(Step S350)
The retry unit 215 determines whether the number of retries is a predetermined number n or more. If the number of retries is greater than or equal to the predetermined number n, the process proceeds to step S360. If the number of retries is not greater than or equal to the predetermined number n, the process returns to step S320.

  Here, the number of retries is the number of times the retry unit 215 has caused the communication port normality determination unit 214 to determine whether or not the communication port 132P (n) can be output.

(Step S360)
The communication device 130 (2) gives up the notification of the autonomous monitoring data to the monitoring control device 110. The monitoring control unit 131 (2) does not instruct the autonomous monitoring data transmission unit 216 to perform autonomous monitoring data transmission processing. In addition, the monitoring control unit 131 (2) may erase the autonomous monitoring data temporarily stored in the autonomous monitoring data storage unit 213, for example.

  After the start-up of the monitoring control unit 131 (2), the communication device 130 (2) temporarily buffers the device start-up completion notification information in the autonomous monitoring data storage unit 213, and typically the communication device 130 (2). When all the restoration processes are completed, the output enable / disable state of the communication port 132P (n) responsible for in-band monitoring is confirmed.

  If the communication port 132P (n) is ready for notification, the communication device 130 (2) reads the autonomous monitoring data from the autonomous monitoring data storage unit 213 and starts notification. If the communication port 132P (n) is in a notification disabled state, the communication device 130 (2) causes the retry unit 215 to keep time and waits for transmission processing for a predetermined time.

  When the predetermined time has elapsed, the communication port normality determination unit 214 confirms the state of the communication port 132P (n) again, and when the communication port 130P (n) is ready for notification, the communication device 130 (2) Autonomous monitoring data is read from 213 and notified. When a predetermined time corresponding to a sufficient time that can be notified in normal time has elapsed, and the communication port 132P (n) does not enter a notification enabled state even after retrying n times or more. May clear (initialize) the autonomous monitoring data storage unit 213 and give up the notification.

  In addition, the communication device 130 (2) temporarily buffers the line interface unit 132 start-up completion notification information in the autonomous monitoring data storage unit 213 after the start-up of the line interface unit 132, and the communication port 132P responsible for in-band monitoring. Check the state of (n).

  If the communication port 132P (n) is in a notification enabled state, the communication device 130 (2) reads the autonomous monitoring data from the autonomous monitoring data storage unit 213 and notifies the monitoring control device 110 (2) of the autonomous monitoring data.

  If the communication port 132P (n) is in a port state that cannot be notified, the communication device 130 (2) causes the retry unit 215 to count the timer and waits for a predetermined time. When the predetermined time elapses, the communication port normality determination unit 214 confirms the state of the communication port 132P (n) again, and when the communication port 130P (n) is ready for notification, the communication device 130 (2) reads from the autonomous monitoring data storage unit 213. Read autonomous monitoring data and start notification.

  The retry unit 215 performs a standby process corresponding to a sufficient amount of time that can be notified in a normal time, and also notifies the communication port 132P (n) status check retry for a predetermined number of times n or more. When the communication device 130 (2) does not become possible, the communication device 130 (2) may initialize (clear) the autonomous monitoring data storage unit 213 and give up the notification.

  In addition, the communication device 130 (2) temporarily returns the recovery notification information after the line interface unit 132 (n) is recovered from the failure state or the communication port 132P (n) is recovered from the port closed (or LinkDown) state. Buffer in the autonomous monitoring data storage unit 213 and check the state of the communication port 132P (n) responsible for in-band monitoring.

  If the communication port 132P (n) is in a notification enabled state, the autonomous monitoring data is read from the autonomous monitoring data storage unit 213, and the autonomous monitoring data is notified to the monitoring control device 110 (2).

  If the communication port 132P (n) is in a port state that cannot be used for notification, the communication device 130 (2) causes the retry unit 215 to count the timer and waits for a predetermined time. When the predetermined time elapses, the communication port normality determination unit 214 confirms the state of the communication port 132P (n) again, and when the communication port 130P (n) is ready for notification, the communication device 130 (2) reads from the autonomous monitoring data storage unit 213. Read autonomous monitoring data and start notification.

  The retry unit 215 performs a standby process corresponding to a sufficient amount of time that can be notified in a normal time, and also notifies the communication port 132P (n) status check retry for a predetermined number of times n or more. When the communication device 130 (2) does not become possible, the communication device 130 (2) may initialize (clear) the autonomous monitoring data storage unit 213 and give up the notification.

  In addition, the communication device 130 (2), when the line interface unit 132 is configured redundantly, after switching the line interface unit 132, once the line interface unit 132 switching notification information is stored in the autonomous monitoring data storage unit 213. And the state of the communication port 132P (n) responsible for in-band monitoring is confirmed.

  If the communication port 132P (n) is in a notification enabled state, the communication device 130 (2) reads the autonomous monitoring data from the autonomous monitoring data storage unit 213 and notifies the monitoring control device 110 (2) of the autonomous monitoring data.

  If the communication port 132P (n) is in a port state that cannot be used for notification, the communication device 130 (2) causes the retry unit 215 to count the timer and waits for a predetermined time. When the predetermined time elapses, the communication port normality determination unit 214 confirms the state of the communication port 132P (n) again, and when the communication port 130P (n) is ready for notification, the communication device 130 (2) reads from the autonomous monitoring data storage unit 213. Read autonomous monitoring data and start notification.

  The retry unit 215 performs a standby process corresponding to a sufficient amount of time that can be notified in a normal time, and also notifies the communication port 132P (n) status check retry for a predetermined number of times n or more. When the communication device 130 (2) does not become possible, the communication device 130 (2) may initialize (clear) the autonomous monitoring data storage unit 213 and give up the notification.

  In addition, when the communication port 132P is redundantly configured, the communication device 130 (2) temporarily buffers the communication port 132P switching notification information as autonomous monitoring data in the autonomous monitoring data storage unit 213 after switching the communication port 132P. The state of the communication port 132P (n) responsible for in-band monitoring is confirmed.

  If the communication port 132P (n) is in a notification enabled state, the communication device 130 (2) reads the autonomous monitoring data from the autonomous monitoring data storage unit 213 and notifies the monitoring control device 110 (2) of the autonomous monitoring data.

  If the communication port 132P (n) is in a port state that cannot be used for notification, the communication device 130 (2) causes the retry unit 215 to count the timer and waits for a predetermined time. When the predetermined time elapses, the communication port normality determination unit 214 confirms the state of the communication port 132P (n) again, and when the communication port 130P (n) is ready for notification, the communication device 130 (2) reads from the autonomous monitoring data storage unit 213. Read autonomous monitoring data and start notification.

  The retry unit 215 performs a standby process corresponding to a sufficient amount of time that can be notified in a normal time, and also notifies the communication port 132P (n) status check retry for a predetermined number of times n or more. When the communication device 130 (2) does not become possible, the communication device 130 (2) may initialize (clear) the autonomous monitoring data storage unit 213 and give up the notification.

  In addition, when the communication device 130 (2) is configured redundantly, the communication device 130 (2) temporarily switches the device switching notification information to the autonomous monitoring data storage unit 213 as autonomous monitoring data after switching the communication device 130 (2). Buffering and checking the state of the communication port 132P (n) responsible for in-band monitoring.

  If the communication port 132P (n) is ready for notification, the communication device 130 (2) reads the autonomous monitoring data from the autonomous monitoring data storage unit 213 and notifies the monitoring control device 110 of the autonomous monitoring data.

  If the communication port 132P (n) is in a port state that cannot be used for notification, the communication device 130 (2) causes the retry unit 215 to count the timer and waits for a predetermined time. When the predetermined time elapses, the communication port normality determination unit 214 confirms the state of the communication port 132P (n) again, and when the communication port 130P (n) is ready for notification, the communication device 130 (2) reads from the autonomous monitoring data storage unit 213. Read autonomous monitoring data and start notification.

  The retry unit 215 performs a standby process corresponding to a sufficient amount of time that can be notified in a normal time, and also notifies the communication port 132P (n) status check retry for a predetermined number of times n or more. When the communication device 130 (2) does not become possible, the communication device 130 (2) may initialize (clear) the autonomous monitoring data storage unit 213 and give up the notification.

(Second embodiment)
An outline of the configuration of the communication apparatus 130 according to the second embodiment will be described with reference to a block diagram. FIG. 4 is a block diagram illustrating a configuration example of the communication device 130 (3) according to the embodiment. In FIG. 4, the components corresponding to those in FIG. 2 are denoted by the corresponding reference numerals, and the description will be simplified in order to avoid duplication of description.

  In FIG. 4, the communication device 130 (3) includes a monitoring control unit 131 (2) included in the CPU 131 and an autonomous monitoring data collection unit 212 that collects autonomous monitoring data. The autonomous monitoring data collection unit 212 includes autonomous monitoring data collection units 212 (1) to 212 (6) that are dedicated to individual collection of the autonomous monitoring data to be collected, for example, (1a) to (6a) described above. However, in FIG. 4, for convenience of explanation, it is illustrated as a single autonomous monitoring data collection unit 212.

  Further, the communication device 130 (3) includes an autonomous monitoring data storage unit 213 that temporarily stores the autonomous monitoring data collected by the autonomous monitoring data collection unit 212. In addition, the communication device 130 (3) includes a communication port that determines the normality of communication between the communication port 132P (n) responsible for transmission of autonomous monitoring data in the in-band monitoring method and the monitoring control device 110 (2). A communication confirmation unit 214 (2) with the OPS is provided. The communication confirmation unit 214 (2) between the communication port and the OPS is in a state in which the communication network line 120 (2) as the user network can communicate between the communication device 130 (3) and the monitoring control device 110 (2). It shall be determined by checking whether or not.

  The communication device 130 (3) waits for a predetermined time when the communication confirmation unit 214 (2) between the communication port and the OPS determines that the communication network line 120 (2) is not communicable. In addition, the communication port / OPS communication confirmation unit 214 (2) again includes a retry unit 215 that confirms whether or not the communication network line 120 (2) is in a communicable state.

  The retry unit 215 causes the communication confirmation unit 214 (2) for communication between the communication port and the OPS to determine whether or not the communication network line 120 (2) is in a communicable state. The predetermined time is counted a plurality of times until the time is exceeded. However, if the communication confirmation unit 214 (2) between the communication port and the OPS determines that the communication network line 120 (2) is communicable during the retry, the communication device 130 (3) Performs monitoring data communication processing.

  Further, the communication device 130 (3) includes an autonomous monitoring data transmission unit 216 serving as a driver that causes the hardware unit 220 of the communication device 130 (3) to perform transmission processing. Monitoring control unit 131 (2), autonomous monitoring data collection unit 212, autonomous monitoring data storage unit 213, communication confirmation unit 214 (2) between communication port and OPS, retry unit 215, autonomous monitoring data transmission unit 216 may be included in the software unit 210 (2) as a program process.

  The monitoring control unit 131 (2) instructs the autonomous monitoring data collection unit 212 to collect autonomous monitoring data, and temporarily stores the collected autonomous monitoring data in the autonomous monitoring data storage unit 213.

  In addition, the monitoring control unit 131 (2) sends the communication network line 120 to the communication confirmation unit 214 (2) between the communication port and the OPS before transmitting the collected autonomous monitoring data to the monitoring control device 110 (2). Whether or not (2) is in a communicable state is confirmed.

  If the communication network line 120 (2) is in a communicable state, the monitoring control unit 131 (2) stores the autonomous monitoring data temporarily stored in the autonomous monitoring data storage unit 213 in the autonomous monitoring data transmission unit 216. Transmission processing is performed via the communication port 132P (n).

  If the communication network line 120 (2) is not in a communicable state, the monitoring control unit 131 (2) causes the retry unit 215 to count up for a predetermined time and wait. The retry unit 215 counts up the standby time for a predetermined time, and then again checks whether the communication network line 120 (2) can communicate with the communication confirmation unit 214 (2) between the communication port and the OPS. Make a confirmation.

  The retry unit 215 causes the communication confirmation unit 214 (2) for communication between the communication port and the OPS to confirm and determine whether or not the communication network line 120 (2) is in a communicable state. It is assumed to repeatedly confirm and determine until

  If the communication confirmation unit 214 (2) between the communication port and the OPS determines that the communication network line 120 (2) is communicable in the repetition process, the monitoring control unit 131 (2) The transmission unit 216 transmits the autonomous monitoring data temporarily stored in the autonomous monitoring data storage unit 213 via the communication port 132P (n). Therefore, the retry unit 215 may include a timer, a predetermined time storage unit that stores a predetermined time in advance, and a predetermined number storage unit that stores a predetermined number of times (n times).

  In addition, the hardware unit 220 of the communication device 130 (3) includes a buffer memory 221 serving as a transmission buffer and a communication port 132P (n) serving as a line I / F. As described above, the communication port 132P (n) is communicably connected to the monitoring control device 110 (2) via the communication network line 120 (2) which is a user network.

  Next, the operation and processing of the communication device 130 (3) will be described with reference to FIG. FIG. 5 is a flowchart for explaining the outline of the operation and processing of the communication device 130 (3). Therefore, the operation and processing of the communication device 130 (3) will be described below based on the steps shown in FIG.

(Step S510)
The monitoring control unit 131 (2) monitors the autonomous monitoring data collected by the autonomous monitoring data collection unit 212, and determines whether or not a factor for notifying the monitoring control device 110 (2) of the autonomous monitoring data has occurred. To do. If a factor for notifying the autonomous monitoring data is generated, the process proceeds to step S520. If no factor for notifying the autonomous monitoring data has occurred, the process stands by in step S510. Note that the monitoring control unit 131 (2) temporarily stores the autonomous monitoring data collected by the autonomous monitoring data collection unit 212 in the autonomous monitoring data storage unit 213.

(Step S520)
The monitoring control unit 131 (2) determines whether the communication network line 120 (2) used when notifying the monitoring control device 110 (2) is in a communicable state, and communicates between the communication port and the OPS. Instruct the confirmation unit 214 (2) to make a determination.

  The communication confirmation unit 214 (2) between the communication port and the OPS sends an “ARP frame” from the communication port 132P (n) to the monitoring control device 110 (2) based on an instruction from the monitoring control unit 131 (2). To do.

(Step S530)
The communication confirmation unit 214 (2) between the communication port and the OPS determines whether or not there is a response to the “ARP frame” sent in step S520. If there is a response of the sent “ARP frame”, the process proceeds to step S540. If there is no response to the transmitted “ARP frame”, the process proceeds to step S550.

  That is, when the communication network line 120 (2) is in a communicable state, the process proceeds to step S540. If the communication network line 120 (2) is not in a communicable state, the process proceeds to step S550.

(Step S540)
The monitoring control unit 131 (2) causes the autonomous monitoring data transmission unit 216 to perform autonomous monitoring data transmission processing. Upon receiving the instruction from the monitoring control unit 131 (2), the autonomous monitoring data transmission unit 216 sends the autonomous monitoring data temporarily stored in the autonomous monitoring data storage unit 213 to the hardware unit 220 as the communication port 132P. A process of transmitting from (n) to the monitoring control device 110 (2) via the communication network line 120 (2) is performed.

(Step S550)
The monitoring control unit 131 (2) causes the retry unit 215 to count up the standby time for a predetermined time. The retry unit 215 may include a predetermined time storage unit that stores a predetermined time, and a timer.

(Step S560)
The retry unit 215 determines whether the number of retries is a predetermined number n or more. If the number of retries is greater than or equal to the predetermined number n, the process proceeds to step S570. If the number of retries is not greater than or equal to the predetermined number n, the process returns to step S520.

  Here, the number of retries is the number of times that the retry unit 215 causes the communication confirmation unit 214 (2) between the communication port and the OPS to determine whether or not the communication network line 120 (2) is in a communicable state. Suppose that In other words, the number of retries means that the communication confirmation unit 214 (2) between the communication port and the OPS sends “ARP” from the communication port 132P (n) to the monitoring control device 110 (2) after the notification factor is generated in step S510. Corresponds to the number of times "frame" has been sent.

(Step S570)
The communication device 130 (3) gives up the notification of the autonomous monitoring data to the monitoring control device 110. The monitoring control unit 131 (2) does not instruct the autonomous monitoring data transmission unit 216 to perform autonomous monitoring data transmission processing. In addition, the monitoring control unit 131 (2) may erase the autonomous monitoring data temporarily stored in the autonomous monitoring data storage unit 213, for example.

  After the start-up of the monitoring control unit 131 (2) is completed, the communication device 130 (3) temporarily buffers the device start-up completion notification information in the autonomous monitoring data storage unit 213 as autonomous monitoring data, and the communication device 130 (3). When all the restoration processes are completed, an ARP request is sent from the communication port 132P (n) responsible for in-band monitoring to the monitoring controller 110 (2).

  If the communication device 130 (3) can recognize the ARP reply, the communication device 130 (3) reads the autonomous monitoring data from the autonomous monitoring data storage unit 213 and notifies the monitoring control device 110 (2). If the communication confirmation unit 214 (2) between the communication port and the OPS cannot recognize the ARP reply, the retry unit 215 puts a timer on standby for a predetermined time.

  If the predetermined time elapses, the communication confirmation unit 214 (2) between the communication port and the OPS sends the ARP request again, and if the communication confirmation unit 214 (2) between the communication port and the OPS can recognize the ARP reply, autonomous monitoring is performed. Autonomous monitoring data is read from the data storage unit 213 and notified to the monitoring control device 110 (2). If the communication device 130 (3) has a predetermined standby time equivalent to a sufficient time enough to enable ARP reply at normal time and the ARP reply cannot be recognized even after retrying a predetermined number of times n or more. The autonomous monitoring data storage unit 213 may be initialized (cleared) to give up the notification.

  In addition, the communication device 130 (3) temporarily buffers the line interface unit 132 start-up completion notification information as autonomous monitoring data in the autonomous monitoring data storage unit 213 after the line interface unit 132 has been started up, and performs in-band monitoring. An ARP request is transmitted from the communication port 132P (n) responsible for the monitoring control device 110 (2).

  If the communication device 130 (3) can recognize the ARP reply, the communication device 130 (3) reads the autonomous monitoring data from the autonomous monitoring data storage unit 213 and notifies the monitoring control device 110 (2). If the communication confirmation unit 214 (2) between the communication port and the OPS cannot recognize the ARP reply, the retry unit 215 puts a timer on standby for a predetermined time.

  If the predetermined time elapses, the communication confirmation unit 214 (2) between the communication port and the OPS sends the ARP request again, and if the communication confirmation unit 214 (2) between the communication port and the OPS can recognize the ARP reply, autonomous monitoring is performed. Autonomous monitoring data is read from the data storage unit 213 and notified to the monitoring control device 110 (2). If the communication device 130 (3) has a predetermined standby time equivalent to a sufficient time enough to enable ARP reply at normal time and the ARP reply cannot be recognized even after retrying a predetermined number of times n or more. The autonomous monitoring data storage unit 213 may be initialized (cleared) to give up the notification.

  In addition, the communication device 130 (3) temporarily stores the recovery notification information when the line interface unit 132 is recovered from the failure state, or the recovery notification information after the communication port 132P is recovered from the blockage (or link down), as autonomous monitoring data. The ARP request is sent from the communication port 132P (n) responsible for in-band monitoring to the monitoring control device 110 (2).

  If the communication device 130 (3) can recognize the ARP reply, the communication device 130 (3) reads the autonomous monitoring data from the autonomous monitoring data storage unit 213 and notifies the monitoring control device 110 (2). If the communication confirmation unit 214 (2) between the communication port and the OPS cannot recognize the ARP reply, the retry unit 215 puts a timer on standby for a predetermined time.

  If the predetermined time elapses, the communication confirmation unit 214 (2) between the communication port and the OPS sends the ARP request again, and if the communication confirmation unit 214 (2) between the communication port and the OPS can recognize the ARP reply, autonomous monitoring is performed. Autonomous monitoring data is read from the data storage unit 213 and notified to the monitoring control device 110 (2). If the communication device 130 (3) has a predetermined standby time equivalent to a sufficient time enough to enable ARP reply at normal time and the ARP reply cannot be recognized even after retrying a predetermined number of times n or more. The autonomous monitoring data storage unit 213 may be initialized (cleared) to give up the notification.

  Further, when the line interface unit 132 is redundantly configured, the communication device 130 (3) temporarily buffers the line interface unit 132 switching information as autonomous monitoring data in the autonomous monitoring data storage unit 213 after switching the line interface unit 132. The ARP request is transmitted from the communication port 132P (n) responsible for in-band monitoring to the monitoring control device 110 (2).

  If the communication device 130 (3) can recognize the ARP reply, the communication device 130 (3) reads the autonomous monitoring data from the autonomous monitoring data storage unit 213 and notifies the monitoring control device 110 (2). If the communication confirmation unit 214 (2) between the communication port and the OPS cannot recognize the ARP reply, the retry unit 215 puts a timer on standby for a predetermined time.

  If the predetermined time elapses, the communication confirmation unit 214 (2) between the communication port and the OPS sends the ARP request again, and if the communication confirmation unit 214 (2) between the communication port and the OPS can recognize the ARP reply, autonomous monitoring is performed. Autonomous monitoring data is read from the data storage unit 213 and notified to the monitoring control device 110 (2). If the communication device 130 (3) has a predetermined standby time equivalent to a sufficient time enough to enable ARP reply at normal time and the ARP reply cannot be recognized even after retrying a predetermined number of times n or more. The autonomous monitoring data storage unit 213 may be initialized (cleared) to give up the notification.

  In addition, when the communication port 132P is configured redundantly, the communication device 130 (3) temporarily buffers the communication port 132P switching information as autonomous monitoring data in the autonomous monitoring data storage unit 213 after switching the communication port 132P. An ARP request is sent from the communication port 132P (n) responsible for in-band monitoring to the monitoring control device 110 (2).

  If the communication device 130 (3) can recognize the ARP reply, the communication device 130 (3) reads the autonomous monitoring data from the autonomous monitoring data storage unit 213 and notifies the monitoring control device 110 (2). If the communication confirmation unit 214 (2) between the communication port and the OPS cannot recognize the ARP reply, the retry unit 215 puts a timer on standby for a predetermined time.

  If the predetermined time elapses, the communication confirmation unit 214 (2) between the communication port and the OPS sends the ARP request again, and if the communication confirmation unit 214 (2) between the communication port and the OPS can recognize the ARP reply, autonomous monitoring is performed. Autonomous monitoring data is read from the data storage unit 213 and notified to the monitoring control device 110 (2). If the communication device 130 (3) has a predetermined standby time equivalent to a sufficient time enough to enable ARP reply at normal time and the ARP reply cannot be recognized even after retrying a predetermined number of times n or more. The autonomous monitoring data storage unit 213 may be initialized (cleared) to give up the notification.

  Further, when the communication device 130 (3) is redundantly configured, the communication device 130 (3) switching information (corresponding to device notification) is temporarily stored in the autonomous monitoring data storage unit 213 after the communication device 130 (3) is switched. Buffered as autonomous monitoring data, an ARP request is sent from the communication port 132P (n) responsible for in-band monitoring to the monitoring control device 110 (2).

  If the communication device 130 (3) can recognize the ARP reply, the communication device 130 (3) reads the autonomous monitoring data from the autonomous monitoring data storage unit 213 and notifies the monitoring control device 110 (2). If the communication confirmation unit 214 (2) between the communication port and the OPS cannot recognize the ARP reply, the retry unit 215 puts a timer on standby for a predetermined time.

  If the predetermined time elapses, the communication confirmation unit 214 (2) between the communication port and the OPS sends the ARP request again, and if the communication confirmation unit 214 (2) between the communication port and the OPS can recognize the ARP reply, autonomous monitoring is performed. Autonomous monitoring data is read from the data storage unit 213 and notified to the monitoring control device 110 (2). If the communication device 130 (3) has a predetermined standby time equivalent to a sufficient time enough to enable ARP reply at normal time and the ARP reply cannot be recognized even after retrying a predetermined number of times n or more. The autonomous monitoring data storage unit 213 may be initialized (cleared) to give up the notification.

  As an example of the communication device 130, a layer 2 switch device to which the present invention can be applied is already well known. However, as a precaution, a line interface unit (LIU) to which multiple communication cables are connected and a central processing unit (CPU) that controls the hardware functions of the line interface unit (LIU) are implemented. The layer 2 switching device will be briefly described below. The line interface unit is also called a so-called line card.

  FIG. 7 is a diagram showing an overview of a configuration example of a layer 2 switch device to which the present invention is applied. As shown in FIG. 7, the layer 2 switch device is a CPU card equipped with a plurality of line interface units LIU1 to LIUn (n is an arbitrary natural number) and a central processing unit (CPU) that controls the line interface units LIU1 to LIUn. And are implemented. Each of the line interface units LIU1 to LIUn has a plurality of ports to which Ethernet (Registered Trademark) standard LAN (Local Area Network) cables are connected, and selectively forms connection paths between the cables connected to the ports. It has the function to do.

  FIG. 8 is a conceptual diagram showing a configuration example inside the layer 2 switch device. In FIG. 8, each of the line interface units LIU1 to LIUn is serially connected to other line interface units by serializers / deserializers (SerDes) 11 to 13, for example, in a mesh shape. Inside, ports 21 to 23 to which LAN cables are attached, input processing units (Ingress) 31 to 33, distribution blocks 311 to 313, output processing units (Egress) 41 to 43, control LAN ports 51 to 53, line Interface units CPU (LIU-CPU) 61-63 are provided. In addition to the connections shown in FIG. 8, a switch card that relays exchanges between line cards may be mounted in a slot of a shelf-type relay device (such as a layer 2 switch). The shelf-type relay device may include a housing called a shelf having a plurality of slots, a switch card mounted in the slot, and the like. The switch card may be electrically connected through a BWB wiring provided on a BWB (Back Wired Board) wiring board, for example. The switch card functions as a switch for other cards to exchange data and has a CPU and a switch unit. The CPU is an arithmetic device that executes various controls, and the switch unit may be a switch that relays data and the like exchanged by other cards.

  The subscripts attached to the constituent elements of the line interface units LIU1 to LIUn are respectively shown in correspondence with the line interface units LIU1 to LIUn, and are assigned to the line interface units LIU1 to LIUn. When the distinction is unnecessary, the subscript is omitted.

  Each functional unit in the layer 2 switch device will be described below. The port 2 is connected to another communication device or the like with an Ethernet (registered trademark) standard LAN cable, and transmits and receives packets to and from the communication device. There are various types such as 10BASE-T, 100BASE-TX, 1000BASE-SX, and 10GBASE-R depending on the communication speed and the type of transmission medium. They are standardized by IEEE 802.3.

  The input processing unit 3 is a functional block that controls received packets input from the port 2, learning MAC (Media Access Control) addresses, packet control according to VLAN (Virtual LAN) settings, packet filtering, QoS (Quality of Service) It has functions for performing bandwidth control according to settings, adding a layer 1 header, and the like.

  The distribution block 31 has a function of packet transfer (forwarding), and has a function of transferring a packet to the transfer destination line interface unit based on the layer 1 header given by the input processing unit 3. The serializer / deserializer 1 converts the parallel signal of the packet to be transferred into a serial signal and transmits it to another line interface unit, and converts the packet received as a serial signal from the other line interface unit into a parallel signal. It has a function of outputting to the output processing unit 4 in its own card.

  The output processing unit 4 has a function to control the transmission packet, and deletes the layer 1 header given by the input processing unit 3, learns the MAC address, shaping, bandwidth control according to the QoS setting, packet discard control And the like. The control LAN port 5 is a port for communicating control packets with a central processing unit (CPU) 71 of the CPU card 7.

  The line interface unit CPU 6 is a central processing unit (CPU) that controls / monitors the serializer / deserializer 1, the port 2, the input processing unit 3, and the output processing unit 4. A request for setting a hardware function or reading status information from the CPU card 7 is received via the control LAN port 5, control is performed according to the request, and the control result is sent to the central processing unit (CPU) ( CPU) 71.

  A CPU card 7 on which a central processing unit (CPU) is mounted is connected to each line interface unit LIU1 to LIUn by control LAN ports 721 to 723, and transmits control packets to each line interface unit LIU1 to LIUn and the control LAN. The line interface unit CPU6 exchanged via the ports 721 to 723 and mounted in each of the line interface units LIU1 to LIUn controls the own line interface unit according to the control packet.

  The signal transmission / reception operation in each of the line interface units LIU1 to LIUn is as follows. For example, a packet input from the port 21 of the line interface unit LIU1 passes through the input processing unit 31, is distributed based on the layer 1 header by the distribution block 311 in the input processing unit 31, and is transferred to the destination line interface unit such as LIU2. To the serializer / deserializer 11.

  The transfer destination line interface unit LIU2 sends a packet input from the serializer / deserializer 11 of the transfer source line interface unit LIU1 via the serializer / deserializer 12 to the outside through the output processing unit 42.

  In the layer 2 switch device having a plurality of line interface units as described above, when a communication error occurs between the line interface units or between the line interface units and the CPU card, the following A failure occurs.

(1c) When a communication error occurs between the line interface units LIUX-LIUY in the same device, packet transfer within the same device between the line interface units LIUX-LIUY becomes impossible.

(2c) When a communication abnormality occurs between the line interface unit LIUX and the CPU card 7 in the same device, various settings cannot be made on the line interface unit LIUX where the communication abnormality has occurred.

  FIG. 9 is a diagram showing an example of the occurrence of the failure (1c) described above, and shows a case where a failure has occurred in the serializer / deserializer 12 of the line interface unit LIU2. The serializer / deserializer 12 is assumed to be connected to the line interface unit LIU1. A packet that is input through the port 21 of the line interface unit LIU1 and is to be transferred to the line interface unit LIU2 passes through the input processing unit 31 and is sent to the destination line interface unit LIU2 in the distribution block 311 based on the layer 1 header. It is output to the connected serializer / deserializer 11.

  However, because a failure has occurred in the serializer / deserializer 12 of the line interface unit LIU2 connected to the line interface unit LIU1, packets cannot be transferred from the line interface unit LIU1 to the line interface unit LIU2, and the line interface unit LIU1 Communication to the line interface unit LIU2 is interrupted, and a communication failure is given to the user equipment connected to the ports 21 and 22 of the line interface units LIU1 and LIU2.

  Similarly, when the packet input from the port 22 of the line interface unit LIU2 is transferred to the line interface unit LIU1, the serializer / deserializer 12 connected to the line interface unit LIU1 is out of order. Packets cannot be transferred from the LIU 2 to the line interface unit LIU 1.

  As a method for recovering from such a packet transfer failure, the line interface unit LIU2 including the failed serializer / deserializer 12 is replaced. Until the replacement work is performed, the communication between the line interface unit LIU1 and the line interface unit LIU2 is disconnected.

  FIG. 10 is a diagram showing an example of the occurrence of the failure (2c) described above. When the control LAN port 52 of the line interface unit LIU2 is blocked, the LAN connection between the CPU card 7 and the line interface unit LIU2 is disconnected. Shows the case. In this state, communication between the CPU card 7 and the line interface unit LIU2 becomes impossible, and all control packets for hardware setting from the CPU card 7 to the line interface unit LIU2 cannot be transmitted. The LIU 2 hardware function cannot be set.

  As a method for recovering from such a failure in hardware function setting, the line interface unit LIU2 including the control LAN port 52 is replaced. Until the replacement work is performed, the CPU card 7 cannot control the line interface unit LIU2.

  In the above description, for example, when the ports 21 to 23 (line ports) to which the LAN cable is attached are blocked, not only the communication function is impaired, but in the in-band monitoring method, the startup startup information to the monitoring control device 110 Etc. cannot be notified. For this reason, it is preferable to apply 1st embodiment, 2nd embodiment, or embodiment which combined 1st and 2nd.

  Next, the hardware configuration and ARP frame of another L2 switch to which the present invention can be applied will be described. FIG. 11 is a diagram illustrating a hardware configuration of another L2 switch. In FIG. 11, the L2 switch transmits / receives a frame to / from a storage unit 22 that is a storage area such as a memory, a processing unit 23 that performs data processing and control, and a frame relay processing unit 21 that performs frame relay processing. Interfaces 24-1 and 24-2.

  FIG. 12 is a conceptual diagram illustrating functional blocks of the frame relay processing unit 21. As shown in FIG. 12, the frame relay processing unit 21 includes a timer 35 that measures the timing of transmitting an ARP request frame to the IP host (1), and an ARP request transmission unit 31 that transmits the ARP request frame to the IP host (1). The ARP reply receiving unit 32 that receives the ARP reply frame from the IP host (1), the destination MAC address converting unit 33 that converts the destination MAC address of the received ARP reply frame into a broadcast address, and the converted ARP frame, An ARP frame transmission unit that transmits the ARP reply frame to all interfaces other than the interface that has received the ARP reply frame.

  11 and 12, the L2 switch performs processing as shown in FIG. FIG. 13 is a flowchart illustrating an outline of operation processing of the L2 switch. First, when an event occurs in S41 or when a certain time elapses, the process proceeds to S42, and an ARP request frame is transmitted from the ARP request transmission unit 31 of the frame relay processing unit 21. Thereafter, when the ARP reply frame from the IP host is received in S43, the process proceeds to S44, where the destination MAC address conversion unit 33 converts the destination MAC address of the received ARP reply frame into broadcast, and in S45, the converted ARP The frame is transmitted from the ARP frame transmission unit 34. This series of processing is repeated at regular intervals or at specific timing based on the time measured by the timer 35.

  Further, the L2 switch may be configured as shown in FIG. 14, for example. FIG. 14 is a conceptual configuration diagram illustrating a configuration of a communication network including two communication channels including an L2 switch and an L3 switch.

  The IP address of the IP host (1) is 10.0.1.1, and the MAC addresses are 00: 00: 0e: 00: 00: 11 and 00: 00: 0e: 00: 00: 12. The IP address of the L2 switch # 1 is 10.0.1.2, and the MAC address is 00: 00: 0e: 00: 00: 02.

  In the communication network system shown in FIG. 14, ARP frames defined in RFC826 are exchanged. The ARP frame in Ethernet (registered trademark) is defined as a frame format shown in FIG. FIG. 15 is a conceptual diagram illustrating a frame format.

  As shown in FIG. 15, the ARP frame is configured as follows.

(A) Ethernet Address of Destination: destination MAC address,
(B) Ethernet Address of Source: source MAC address, (c) Protocol Type: protocol type,
(D) Hardware Address Space: Specifies the physical layer type such as Ethernet.
(E) Protocol Address Space: Specifies the protocol type.
(F) Byte Length of Each Hardware Address: Byte length of MAC address,
(G) Byte Length of Each Protocol Address: byte length of IP address,
(H) Opcode: Specify either ARP request or ARP reply,
(I) Hardware address of sender: sender MAC address of the frame,
(J) Protocol Address of Sender: Frame transmission source IP address,
(K) Hardware address of target: target MAC address,
(L) Protocol Address of Target: Target IP address.

  The above is an outline description of another L2 switch to which the first and second embodiments can be applied, and an ARP frame for confirming loop regression of a line between the monitoring control device 110 and the communication device 130. In the second embodiment, the communication device 130 outputs the above-mentioned ARP frame from the line port, and confirms whether or not the monitoring control device 110 can be notified.

  The communication apparatus according to the present invention is a communication apparatus comprising a line interface unit and a CPU for controlling the line interface unit, and monitoring control for monitoring and controlling the communication apparatus via a communication network line connected to a communication port of the line interface unit. Checks whether the communication device can notify the monitoring control device from the communication device when transmitting startup information of the communication device to the monitoring control device via the communication network line connected to the device. If notification is impossible, the startup startup information is sent to the monitoring and control device after notification is possible after waiting for a predetermined time. If notification is possible, startup startup is not performed without waiting for the predetermined time. Information is sent to the monitoring control device. The transmission process of the communication device is an autonomous transmission process of autonomous monitoring data that does not depend on an instruction from the monitoring control device.

  The in-band monitoring communication network system 100 described in the embodiment typically has a communication event when the communication device 130 is not in an autonomous monitoring data transmission state when a communication event to the monitoring control device 110 occurs. Waits until transmission is possible before transmitting. Therefore, the communication device 130 can be configured to suppress unnecessary notification of autonomous monitoring data being discarded.

  The configuration of the present invention is not limited to the description in the above-described embodiment, and the configurations of the communication network system 100 and the communication device 130 and the monitoring control device 110 constituting the communication network system 100 are appropriately changed within a self-evident range. Can be used.

  Further, the communication device 130 (2) described in the first embodiment and the communication device 130 (3) described in the second embodiment include a communication abnormality detection unit 214 (3) with a monitoring control unit. May be. That is, the communication device 130 (2) may include a communication abnormality detection unit 214 (3) with the monitoring control device instead of the communication port normality determination unit 214. Further, the communication device 130 (3) may include a communication abnormality detection unit 214 (3) with the monitoring control unit instead of the communication confirmation unit 214 (2) between the communication port and the OPS.

  The communication port normality determination unit 214 and the communication port / OPS communication confirmation unit 214 (2) collectively determine whether or not the autonomous monitoring data can be transmitted to the monitoring control device 110. ), 130 (3) side, it is also considered that it has a function to confirm in the possible range. For this reason, the communication devices 130 (2) and 130 (3) may include a communication abnormality detection unit 214 (3) with the monitoring control device.

  The operations and processes of the present invention are not limited to those described in the above-described embodiment, and the operations and processes of the communication network system 100 and the communication device 130 and the monitoring control device 110 constituting the communication network system 100 are described. The operation and processing can be changed as appropriate within the obvious range.

  In addition, the blockage of the communication port in the above description is not limited to the blockage / unblocking of the port that occurs in connection with the occurrence / recovery of the communication failure, but the port is blocked or blocked by command instruction control from the operator. The release control may be performed. For example, when the operator controls to release the blockage from the port blockage state, the communication port can be restored according to the operator's command control.

  The present invention can be used for a communication network system including a communication device, a transmission device, a relay device, and a monitoring control device.

Claims (18)

A communication device including a line interface unit and a CPU that controls the line interface unit; and a monitoring control device that monitors and controls the communication device via a communication network line connected to a communication port of the line interface unit. In a communication network system,
When the communication device transmits start-up information of the communication device to the monitoring and control device via the communication network line,
Detect the presence or absence of communication failure of the communication port,
When there is a communication failure in the communication port, the communication port waits for a predetermined time that is assumed to be restored to a normal state, repeats the detection of the presence or absence of the communication failure in the communication port a predetermined number of times, and When the port is restored to a normal state, the startup startup information is transmitted to the monitoring control device,
When there is no communication failure of the communication port, the start-up information is transmitted to the monitoring control device without waiting for the predetermined time ,
Whether or not there is a communication failure between the line interface unit and the monitoring control device, depending on whether an ARP request is transmitted from the line interface unit to the monitoring control device and an ARP reply is received from the monitoring control device Detect
When there is a communication failure between the line interface unit and the monitoring control device, the monitoring control device waits for a predetermined time when the communication state with the monitoring control device is assumed to be restored to a normal state. When the ARP reply is accepted, the start-up information is transmitted to the monitoring and control device.
When there is no communication failure between the line interface unit and the monitoring control device, the start-up information is transmitted to the monitoring control device without waiting for the predetermined time. . The communication network system according to claim 1 ,
The communication network system is characterized in that the startup information of the communication device transmitted from the communication device to the monitoring control device via the communication network line is startup information of the line interface unit. The communication network system according to claim 1 ,
The communication network system characterized in that the startup information of the communication device transmitted from the communication device to the monitoring control device via the communication network line is port state information of the communication device. The communication network system according to claim 1 ,
The communication device includes the line interface unit configured redundantly,
The communication network system, wherein the communication device start-up information transmitted from the communication device to the monitoring control device via the communication network line is switching information of the line interface unit. The communication network system according to claim 1 ,
The line interface unit includes the communication port configured redundantly,
The communication network system is characterized in that the startup information of the communication device transmitted from the communication device to the monitoring control device via the communication network line is switching information of the communication port. The communication network system according to claim 1 ,
A redundantly configured communication device;
The communication network system, wherein the communication device start-up information transmitted from the communication device to the monitoring control device via the communication network line is switching information of the communication device. A communication device including a line interface unit and a CPU that controls the line interface unit; and a monitoring control device that monitors and controls the communication device via a communication network line connected to a communication port of the line interface unit. In an autonomous monitoring data communication method of a communication network system,
When the communication device transmits start-up information of the communication device to the monitoring and control device via the communication network line,
A temporary storage step of temporarily storing startup startup information of the communication device;
A communication port failure presence / absence detection step for detecting the presence or absence of a communication failure in the communication port;
When a communication failure of the communication port is detected in the communication port failure presence / absence detection step, the communication port waits for a predetermined time that is assumed to be restored to a normal state, and determines whether or not the communication port has a communication failure again. Detecting a predetermined number of times, and when the communication port recovers to a normal state, a first retry step of transmitting the startup startup information temporarily stored in the temporary storage step to the monitoring control device;
If no communication failure of the communication port is detected in the communication port failure presence / absence detection step, the monitoring and control device stores the startup startup information temporarily stored in the temporary storage step without waiting for the predetermined time. A first transmission step of transmitting to
Whether or not there is a communication failure between the line interface unit and the monitoring control device, depending on whether an ARP request is transmitted from the line interface unit to the monitoring control device and an ARP reply is received from the monitoring control device A communication path failure presence / absence detection step for detecting,
When a communication failure between the line interface unit and the monitoring control device is detected in the communication path failure presence / absence detection step, it is assumed that the communication state between the monitoring control device is restored to a normal state. A second retry step of waiting for a predetermined time, repeatedly transmitting an ARP request to the monitoring control device a predetermined number of times, and transmitting the startup startup information to the monitoring control device when the ARP reply is received; ,
If no communication failure is detected between the line interface unit and the monitoring control device in the communication path failure presence / absence detection step, the startup control information is sent to the monitoring control device without waiting for the predetermined time. A second transmission step of transmitting to the autonomous monitoring data communication method of the communication network system. In the autonomous monitoring data communication method of the communication network system according to claim 7 ,
The communication network system startup information transmitted from the communication device to the monitoring and control device via the communication network line is startup information of the line interface unit. Monitoring data communication method. In the autonomous monitoring data communication method of the communication network system according to claim 7 ,
Autonomous monitoring of a communication network system, wherein the communication device start-up information transmitted from the communication device to the monitoring control device via the communication network line is port state information of the communication device. Data communication method. In the autonomous monitoring data communication method of the communication network system according to claim 7 ,
The communication device includes the line interface unit configured redundantly,
Autonomous monitoring of a communication network system, wherein the communication device start-up information transmitted from the communication device to the monitoring control device via the communication network line is switching information of the line interface unit. Data communication method. In the autonomous monitoring data communication method of the communication network system according to claim 7 ,
The line interface unit includes the communication port configured redundantly,
Autonomous monitoring data of a communication network system, wherein the communication device start-up information transmitted from the communication device to the monitoring control device via the communication network line is switching information of the communication port. Communication method. In the autonomous monitoring data communication method of the communication network system according to claim 7 ,
The communication network system includes the communication device configured redundantly,
Autonomous monitoring data of a communication network system, wherein the communication device start-up information transmitted from the communication device to the monitoring and control device via the communication network line is switching information of the communication device. Communication method. In a communication apparatus comprising a line interface unit and a CPU for controlling the line interface unit,
Connected to a monitoring control device for monitoring and controlling the communication device via a communication network line connected to a communication port of the line interface unit;
When transmitting startup information of the communication device to the monitoring control device via the communication network line,
The communication device detects the presence or absence of a communication failure in the communication port;
When there is a communication failure in the communication port, the communication port waits for a predetermined time that is assumed to be restored to a normal state, repeats the detection of the presence or absence of the communication failure in the communication port a predetermined number of times, and When the port is restored to a normal state, the startup startup information is transmitted to the monitoring control device,
When there is no communication failure of the communication port, the start-up information is transmitted to the monitoring control device without waiting for the predetermined time ,
Depending on whether or not the communication device transmits an ARP request from the line interface unit to the supervisory control device and accepts an ARP reply from the supervisory control device, between the line interface unit and the supervisory control device. Detects whether there is a communication failure,
When there is a communication failure between the line interface unit and the monitoring control device, the monitoring control device waits for a predetermined time when the communication state with the monitoring control device is assumed to be restored to a normal state. When the ARP reply is accepted, the start-up information is transmitted to the monitoring and control device.
A communication apparatus, wherein when there is no communication failure between the line interface unit and the monitoring control apparatus, the start-up information is transmitted to the monitoring control apparatus without waiting for the predetermined time . The communication apparatus according to claim 13 .
The communication apparatus start-up information transmitted to the monitoring control apparatus via the communication network line is start-up information of the line interface unit. The communication apparatus according to claim 13 .
The communication apparatus start-up information transmitted to the monitoring control apparatus via the communication network line is port state information of the communication apparatus. The communication apparatus according to claim 13 .
Comprising the line interface unit configured redundantly;
The communication apparatus start-up information transmitted from the communication apparatus to the monitoring control apparatus via the communication network line is switching information of the line interface unit. The communication apparatus according to claim 13 .
The line interface unit includes the communication port configured redundantly,
The communication device start-up information transmitted from the communication device to the monitoring control device via the communication network line is switching information of the communication port. The communication apparatus according to claim 13 .
The communication device is configured redundantly,
The communication apparatus start-up information transmitted from the communication apparatus to the monitoring control apparatus via the communication network line is switching information of the communication apparatus.

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